2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/driver-api/libata.rst
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
53 #include <linux/ioprio.h>
56 #include "libata-transport.h"
58 #define ATA_SCSI_RBUF_SIZE 4096
60 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
61 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
63 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
65 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
66 const struct scsi_device
*scsidev
);
67 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
68 const struct scsi_device
*scsidev
);
70 #define RW_RECOVERY_MPAGE 0x1
71 #define RW_RECOVERY_MPAGE_LEN 12
72 #define CACHE_MPAGE 0x8
73 #define CACHE_MPAGE_LEN 20
74 #define CONTROL_MPAGE 0xa
75 #define CONTROL_MPAGE_LEN 12
76 #define ALL_MPAGES 0x3f
77 #define ALL_SUB_MPAGES 0xff
80 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
82 RW_RECOVERY_MPAGE_LEN
- 2,
84 0, /* read retry count */
86 0, /* write retry count */
90 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
99 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
101 CONTROL_MPAGE_LEN
- 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
108 static const char *ata_lpm_policy_names
[] = {
109 [ATA_LPM_UNKNOWN
] = "max_performance",
110 [ATA_LPM_MAX_POWER
] = "max_performance",
111 [ATA_LPM_MED_POWER
] = "medium_power",
112 [ATA_LPM_MIN_POWER
] = "min_power",
115 static ssize_t
ata_scsi_lpm_store(struct device
*device
,
116 struct device_attribute
*attr
,
117 const char *buf
, size_t count
)
119 struct Scsi_Host
*shost
= class_to_shost(device
);
120 struct ata_port
*ap
= ata_shost_to_port(shost
);
121 struct ata_link
*link
;
122 struct ata_device
*dev
;
123 enum ata_lpm_policy policy
;
126 /* UNKNOWN is internal state, iterate from MAX_POWER */
127 for (policy
= ATA_LPM_MAX_POWER
;
128 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
129 const char *name
= ata_lpm_policy_names
[policy
];
131 if (strncmp(name
, buf
, strlen(name
)) == 0)
134 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
137 spin_lock_irqsave(ap
->lock
, flags
);
139 ata_for_each_link(link
, ap
, EDGE
) {
140 ata_for_each_dev(dev
, &ap
->link
, ENABLED
) {
141 if (dev
->horkage
& ATA_HORKAGE_NOLPM
) {
148 ap
->target_lpm_policy
= policy
;
149 ata_port_schedule_eh(ap
);
151 spin_unlock_irqrestore(ap
->lock
, flags
);
155 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
156 struct device_attribute
*attr
, char *buf
)
158 struct Scsi_Host
*shost
= class_to_shost(dev
);
159 struct ata_port
*ap
= ata_shost_to_port(shost
);
161 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
164 return snprintf(buf
, PAGE_SIZE
, "%s\n",
165 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
167 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
168 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
169 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
171 static ssize_t
ata_scsi_park_show(struct device
*device
,
172 struct device_attribute
*attr
, char *buf
)
174 struct scsi_device
*sdev
= to_scsi_device(device
);
176 struct ata_link
*link
;
177 struct ata_device
*dev
;
179 unsigned int uninitialized_var(msecs
);
182 ap
= ata_shost_to_port(sdev
->host
);
184 spin_lock_irq(ap
->lock
);
185 dev
= ata_scsi_find_dev(ap
, sdev
);
190 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
197 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
198 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
199 time_after(dev
->unpark_deadline
, now
))
200 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
205 spin_unlock_irq(ap
->lock
);
207 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
210 static ssize_t
ata_scsi_park_store(struct device
*device
,
211 struct device_attribute
*attr
,
212 const char *buf
, size_t len
)
214 struct scsi_device
*sdev
= to_scsi_device(device
);
216 struct ata_device
*dev
;
221 rc
= kstrtol(buf
, 10, &input
);
226 if (input
> ATA_TMOUT_MAX_PARK
) {
228 input
= ATA_TMOUT_MAX_PARK
;
231 ap
= ata_shost_to_port(sdev
->host
);
233 spin_lock_irqsave(ap
->lock
, flags
);
234 dev
= ata_scsi_find_dev(ap
, sdev
);
235 if (unlikely(!dev
)) {
239 if (dev
->class != ATA_DEV_ATA
&&
240 dev
->class != ATA_DEV_ZAC
) {
246 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
251 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
252 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
253 ata_port_schedule_eh(ap
);
254 complete(&ap
->park_req_pending
);
258 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
261 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
266 spin_unlock_irqrestore(ap
->lock
, flags
);
268 return rc
? rc
: len
;
270 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
271 ata_scsi_park_show
, ata_scsi_park_store
);
272 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
274 static ssize_t
ata_ncq_prio_enable_show(struct device
*device
,
275 struct device_attribute
*attr
,
278 struct scsi_device
*sdev
= to_scsi_device(device
);
280 struct ata_device
*dev
;
281 bool ncq_prio_enable
;
284 ap
= ata_shost_to_port(sdev
->host
);
286 spin_lock_irq(ap
->lock
);
287 dev
= ata_scsi_find_dev(ap
, sdev
);
293 ncq_prio_enable
= dev
->flags
& ATA_DFLAG_NCQ_PRIO_ENABLE
;
296 spin_unlock_irq(ap
->lock
);
298 return rc
? rc
: snprintf(buf
, 20, "%u\n", ncq_prio_enable
);
301 static ssize_t
ata_ncq_prio_enable_store(struct device
*device
,
302 struct device_attribute
*attr
,
303 const char *buf
, size_t len
)
305 struct scsi_device
*sdev
= to_scsi_device(device
);
307 struct ata_device
*dev
;
311 rc
= kstrtol(buf
, 10, &input
);
314 if ((input
< 0) || (input
> 1))
317 ap
= ata_shost_to_port(sdev
->host
);
318 dev
= ata_scsi_find_dev(ap
, sdev
);
322 spin_lock_irq(ap
->lock
);
324 dev
->flags
|= ATA_DFLAG_NCQ_PRIO_ENABLE
;
326 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
328 dev
->link
->eh_info
.action
|= ATA_EH_REVALIDATE
;
329 dev
->link
->eh_info
.flags
|= ATA_EHI_QUIET
;
330 ata_port_schedule_eh(ap
);
331 spin_unlock_irq(ap
->lock
);
333 ata_port_wait_eh(ap
);
336 spin_lock_irq(ap
->lock
);
337 if (!(dev
->flags
& ATA_DFLAG_NCQ_PRIO
)) {
338 dev
->flags
&= ~ATA_DFLAG_NCQ_PRIO_ENABLE
;
341 spin_unlock_irq(ap
->lock
);
344 return rc
? rc
: len
;
347 DEVICE_ATTR(ncq_prio_enable
, S_IRUGO
| S_IWUSR
,
348 ata_ncq_prio_enable_show
, ata_ncq_prio_enable_store
);
349 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable
);
351 void ata_scsi_set_sense(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
352 u8 sk
, u8 asc
, u8 ascq
)
354 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
359 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
361 scsi_build_sense_buffer(d_sense
, cmd
->sense_buffer
, sk
, asc
, ascq
);
364 void ata_scsi_set_sense_information(struct ata_device
*dev
,
365 struct scsi_cmnd
*cmd
,
366 const struct ata_taskfile
*tf
)
373 information
= ata_tf_read_block(tf
, dev
);
374 if (information
== U64_MAX
)
377 scsi_set_sense_information(cmd
->sense_buffer
,
378 SCSI_SENSE_BUFFERSIZE
, information
);
381 static void ata_scsi_set_invalid_field(struct ata_device
*dev
,
382 struct scsi_cmnd
*cmd
, u16 field
, u8 bit
)
384 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
385 /* "Invalid field in CDB" */
386 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
390 static void ata_scsi_set_invalid_parameter(struct ata_device
*dev
,
391 struct scsi_cmnd
*cmd
, u16 field
)
393 /* "Invalid field in parameter list" */
394 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
395 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
400 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
401 const char *buf
, size_t count
)
403 struct Scsi_Host
*shost
= class_to_shost(dev
);
404 struct ata_port
*ap
= ata_shost_to_port(shost
);
405 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
406 return ap
->ops
->em_store(ap
, buf
, count
);
411 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
414 struct Scsi_Host
*shost
= class_to_shost(dev
);
415 struct ata_port
*ap
= ata_shost_to_port(shost
);
417 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
418 return ap
->ops
->em_show(ap
, buf
);
421 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
422 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
423 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
426 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
429 struct Scsi_Host
*shost
= class_to_shost(dev
);
430 struct ata_port
*ap
= ata_shost_to_port(shost
);
432 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
434 DEVICE_ATTR(em_message_type
, S_IRUGO
,
435 ata_scsi_em_message_type_show
, NULL
);
436 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
439 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
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
);
446 if (atadev
&& ap
->ops
->sw_activity_show
&&
447 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
448 return ap
->ops
->sw_activity_show(atadev
, buf
);
453 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
454 const char *buf
, size_t count
)
456 struct scsi_device
*sdev
= to_scsi_device(dev
);
457 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
458 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
459 enum sw_activity val
;
462 if (atadev
&& ap
->ops
->sw_activity_store
&&
463 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
464 val
= simple_strtoul(buf
, NULL
, 0);
466 case OFF
: case BLINK_ON
: case BLINK_OFF
:
467 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
476 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
477 ata_scsi_activity_store
);
478 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
480 struct device_attribute
*ata_common_sdev_attrs
[] = {
481 &dev_attr_unload_heads
,
482 &dev_attr_ncq_prio_enable
,
485 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
488 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
489 * @sdev: SCSI device for which BIOS geometry is to be determined
490 * @bdev: block device associated with @sdev
491 * @capacity: capacity of SCSI device
492 * @geom: location to which geometry will be output
494 * Generic bios head/sector/cylinder calculator
495 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
496 * mapping. Some situations may arise where the disk is not
497 * bootable if this is not used.
500 * Defined by the SCSI layer. We don't really care.
505 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
506 sector_t capacity
, int geom
[])
510 sector_div(capacity
, 255*63);
517 * ata_scsi_unlock_native_capacity - unlock native capacity
518 * @sdev: SCSI device to adjust device capacity for
520 * This function is called if a partition on @sdev extends beyond
521 * the end of the device. It requests EH to unlock HPA.
524 * Defined by the SCSI layer. Might sleep.
526 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
528 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
529 struct ata_device
*dev
;
532 spin_lock_irqsave(ap
->lock
, flags
);
534 dev
= ata_scsi_find_dev(ap
, sdev
);
535 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
536 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
537 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
538 ata_port_schedule_eh(ap
);
541 spin_unlock_irqrestore(ap
->lock
, flags
);
542 ata_port_wait_eh(ap
);
546 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
548 * @sdev: SCSI device to get identify data for
549 * @arg: User buffer area for identify data
552 * Defined by the SCSI layer. We don't really care.
555 * Zero on success, negative errno on error.
557 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
560 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
561 u16 __user
*dst
= arg
;
567 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
570 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
571 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
574 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
575 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
578 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
579 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
586 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
587 * @scsidev: Device to which we are issuing command
588 * @arg: User provided data for issuing command
591 * Defined by the SCSI layer. We don't really care.
594 * Zero on success, negative errno on error.
596 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
599 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
600 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
602 enum dma_data_direction data_dir
;
603 struct scsi_sense_hdr sshdr
;
609 if (copy_from_user(args
, arg
, sizeof(args
)))
612 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
616 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
619 argsize
= ATA_SECT_SIZE
* args
[3];
620 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
621 if (argbuf
== NULL
) {
626 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
627 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
628 block count in sector count field */
629 data_dir
= DMA_FROM_DEVICE
;
631 scsi_cmd
[1] = (3 << 1); /* Non-data */
632 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
636 scsi_cmd
[0] = ATA_16
;
638 scsi_cmd
[4] = args
[2];
639 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
640 scsi_cmd
[6] = args
[3];
641 scsi_cmd
[8] = args
[1];
645 scsi_cmd
[6] = args
[1];
647 scsi_cmd
[14] = args
[0];
649 /* Good values for timeout and retries? Values below
650 from scsi_ioctl_send_command() for default case... */
651 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
652 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
654 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
655 u8
*desc
= sensebuf
+ 8;
656 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
658 /* If we set cc then ATA pass-through will cause a
659 * check condition even if no error. Filter that. */
660 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
661 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
662 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
663 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
666 /* Send userspace a few ATA registers (same as drivers/ide) */
667 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
668 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
669 args
[0] = desc
[13]; /* status */
670 args
[1] = desc
[3]; /* error */
671 args
[2] = desc
[5]; /* sector count (0:7) */
672 if (copy_to_user(arg
, args
, sizeof(args
)))
684 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
693 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
694 * @scsidev: Device to which we are issuing command
695 * @arg: User provided data for issuing command
698 * Defined by the SCSI layer. We don't really care.
701 * Zero on success, negative errno on error.
703 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
706 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
707 u8 args
[7], *sensebuf
= NULL
;
708 struct scsi_sense_hdr sshdr
;
714 if (copy_from_user(args
, arg
, sizeof(args
)))
717 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
721 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
722 scsi_cmd
[0] = ATA_16
;
723 scsi_cmd
[1] = (3 << 1); /* Non-data */
724 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
725 scsi_cmd
[4] = args
[1];
726 scsi_cmd
[6] = args
[2];
727 scsi_cmd
[8] = args
[3];
728 scsi_cmd
[10] = args
[4];
729 scsi_cmd
[12] = args
[5];
730 scsi_cmd
[13] = args
[6] & 0x4f;
731 scsi_cmd
[14] = args
[0];
733 /* Good values for timeout and retries? Values below
734 from scsi_ioctl_send_command() for default case... */
735 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
736 sensebuf
, &sshdr
, (10*HZ
), 5, 0, 0, NULL
);
738 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
739 u8
*desc
= sensebuf
+ 8;
740 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
742 /* If we set cc then ATA pass-through will cause a
743 * check condition even if no error. Filter that. */
744 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
745 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
746 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
747 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
750 /* Send userspace ATA registers */
751 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
752 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
753 args
[0] = desc
[13]; /* status */
754 args
[1] = desc
[3]; /* error */
755 args
[2] = desc
[5]; /* sector count (0:7) */
756 args
[3] = desc
[7]; /* lbal */
757 args
[4] = desc
[9]; /* lbam */
758 args
[5] = desc
[11]; /* lbah */
759 args
[6] = desc
[12]; /* select */
760 if (copy_to_user(arg
, args
, sizeof(args
)))
775 static int ata_ioc32(struct ata_port
*ap
)
777 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
779 if (ap
->pflags
& ATA_PFLAG_PIO32
)
784 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
785 int cmd
, void __user
*arg
)
793 spin_lock_irqsave(ap
->lock
, flags
);
795 spin_unlock_irqrestore(ap
->lock
, flags
);
796 return put_user(val
, (unsigned long __user
*)arg
);
799 val
= (unsigned long) arg
;
801 spin_lock_irqsave(ap
->lock
, flags
);
802 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
804 ap
->pflags
|= ATA_PFLAG_PIO32
;
806 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
808 if (val
!= ata_ioc32(ap
))
811 spin_unlock_irqrestore(ap
->lock
, flags
);
814 case HDIO_GET_IDENTITY
:
815 return ata_get_identity(ap
, scsidev
, arg
);
818 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
820 return ata_cmd_ioctl(scsidev
, arg
);
822 case HDIO_DRIVE_TASK
:
823 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
825 return ata_task_ioctl(scsidev
, arg
);
834 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
836 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
838 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
841 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
844 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
845 * @dev: ATA device to which the new command is attached
846 * @cmd: SCSI command that originated this ATA command
848 * Obtain a reference to an unused ata_queued_cmd structure,
849 * which is the basic libata structure representing a single
850 * ATA command sent to the hardware.
852 * If a command was available, fill in the SCSI-specific
853 * portions of the structure with information on the
857 * spin_lock_irqsave(host lock)
860 * Command allocated, or %NULL if none available.
862 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
863 struct scsi_cmnd
*cmd
)
865 struct ata_queued_cmd
*qc
;
867 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
870 qc
->scsidone
= cmd
->scsi_done
;
872 qc
->sg
= scsi_sglist(cmd
);
873 qc
->n_elem
= scsi_sg_count(cmd
);
875 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
882 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
884 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
886 qc
->extrabytes
= scmd
->request
->extra_len
;
887 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
891 * ata_dump_status - user friendly display of error info
892 * @id: id of the port in question
893 * @tf: ptr to filled out taskfile
895 * Decode and dump the ATA error/status registers for the user so
896 * that they have some idea what really happened at the non
897 * make-believe layer.
900 * inherited from caller
902 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
904 u8 stat
= tf
->command
, err
= tf
->feature
;
906 pr_warn("ata%u: status=0x%02x { ", id
, stat
);
907 if (stat
& ATA_BUSY
) {
908 pr_cont("Busy }\n"); /* Data is not valid in this case */
910 if (stat
& ATA_DRDY
) pr_cont("DriveReady ");
911 if (stat
& ATA_DF
) pr_cont("DeviceFault ");
912 if (stat
& ATA_DSC
) pr_cont("SeekComplete ");
913 if (stat
& ATA_DRQ
) pr_cont("DataRequest ");
914 if (stat
& ATA_CORR
) pr_cont("CorrectedError ");
915 if (stat
& ATA_SENSE
) pr_cont("Sense ");
916 if (stat
& ATA_ERR
) pr_cont("Error ");
920 pr_warn("ata%u: error=0x%02x { ", id
, err
);
921 if (err
& ATA_ABORTED
) pr_cont("DriveStatusError ");
922 if (err
& ATA_ICRC
) {
923 if (err
& ATA_ABORTED
)
925 else pr_cont("Sector ");
927 if (err
& ATA_UNC
) pr_cont("UncorrectableError ");
928 if (err
& ATA_IDNF
) pr_cont("SectorIdNotFound ");
929 if (err
& ATA_TRK0NF
) pr_cont("TrackZeroNotFound ");
930 if (err
& ATA_AMNF
) pr_cont("AddrMarkNotFound ");
937 * ata_to_sense_error - convert ATA error to SCSI error
938 * @id: ATA device number
939 * @drv_stat: value contained in ATA status register
940 * @drv_err: value contained in ATA error register
941 * @sk: the sense key we'll fill out
942 * @asc: the additional sense code we'll fill out
943 * @ascq: the additional sense code qualifier we'll fill out
944 * @verbose: be verbose
946 * Converts an ATA error into a SCSI error. Fill out pointers to
947 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
948 * format sense blocks.
951 * spin_lock_irqsave(host lock)
953 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
954 u8
*asc
, u8
*ascq
, int verbose
)
958 /* Based on the 3ware driver translation table */
959 static const unsigned char sense_table
[][4] = {
961 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
962 // Device busy Aborted command
964 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
965 // Device busy Aborted command
967 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
968 // Device fault Hardware error
969 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
970 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
971 // Data CRC error SCSI parity error
972 /* MC|ID|ABRT|TRK0|MARK */
973 {0x37, NOT_READY
, 0x04, 0x00},
974 // Unit offline Not ready
976 {0x09, NOT_READY
, 0x04, 0x00},
977 // Unrecovered disk error Not ready
978 /* Bad address mark */
979 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
980 // Address mark not found for data field
981 /* TRK0 - Track 0 not found */
982 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
984 /* Abort: 0x04 is not translated here, see below */
985 /* Media change request */
986 {0x08, NOT_READY
, 0x04, 0x00},
987 // FIXME: faking offline
988 /* SRV/IDNF - ID not found */
989 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
990 // Logical address out of range
991 /* MC - Media Changed */
992 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
993 // Not ready to ready change, medium may have changed
994 /* ECC - Uncorrectable ECC error */
995 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
996 // Unrecovered read error
997 /* BBD - block marked bad */
998 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
999 // Block marked bad Medium error, unrecovered read error
1000 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1002 static const unsigned char stat_table
[][4] = {
1003 /* Must be first because BUSY means no other bits valid */
1004 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
1005 // Busy, fake parity for now
1006 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
1007 // Device ready, unaligned write command
1008 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
1009 // Device fault, internal target failure
1010 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
1011 // Timed out in xfer, fake parity for now
1012 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
1013 // Recovered ECC error Medium error, recovered
1014 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1018 * Is this an error we can process/parse
1020 if (drv_stat
& ATA_BUSY
) {
1021 drv_err
= 0; /* Ignore the err bits, they're invalid */
1025 /* Look for drv_err */
1026 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
1027 /* Look for best matches first */
1028 if ((sense_table
[i
][0] & drv_err
) ==
1029 sense_table
[i
][0]) {
1030 *sk
= sense_table
[i
][1];
1031 *asc
= sense_table
[i
][2];
1032 *ascq
= sense_table
[i
][3];
1033 goto translate_done
;
1039 * Fall back to interpreting status bits. Note that if the drv_err
1040 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1041 * is not descriptive enough.
1043 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
1044 if (stat_table
[i
][0] & drv_stat
) {
1045 *sk
= stat_table
[i
][1];
1046 *asc
= stat_table
[i
][2];
1047 *ascq
= stat_table
[i
][3];
1048 goto translate_done
;
1053 * We need a sensible error return here, which is tricky, and one
1054 * that won't cause people to do things like return a disk wrongly.
1056 *sk
= ABORTED_COMMAND
;
1062 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1063 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
1068 * ata_gen_passthru_sense - Generate check condition sense block.
1069 * @qc: Command that completed.
1071 * This function is specific to the ATA descriptor format sense
1072 * block specified for the ATA pass through commands. Regardless
1073 * of whether the command errored or not, return a sense
1074 * block. Copy all controller registers into the sense
1075 * block. If there was no error, we get the request from an ATA
1076 * passthrough command, so we use the following sense data:
1077 * sk = RECOVERED ERROR
1078 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1084 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
1086 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1087 struct ata_taskfile
*tf
= &qc
->result_tf
;
1088 unsigned char *sb
= cmd
->sense_buffer
;
1089 unsigned char *desc
= sb
+ 8;
1090 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1091 u8 sense_key
, asc
, ascq
;
1093 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1095 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1098 * Use ata_to_sense_error() to map status register bits
1099 * onto sense key, asc & ascq.
1102 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1103 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1104 &sense_key
, &asc
, &ascq
, verbose
);
1105 ata_scsi_set_sense(qc
->dev
, cmd
, sense_key
, asc
, ascq
);
1108 * ATA PASS-THROUGH INFORMATION AVAILABLE
1109 * Always in descriptor format sense.
1111 scsi_build_sense_buffer(1, cmd
->sense_buffer
,
1112 RECOVERED_ERROR
, 0, 0x1D);
1115 if ((cmd
->sense_buffer
[0] & 0x7f) >= 0x72) {
1118 /* descriptor format */
1120 desc
= (char *)scsi_sense_desc_find(sb
, len
+ 8, 9);
1122 if (SCSI_SENSE_BUFFERSIZE
< len
+ 14)
1125 desc
= sb
+ 8 + len
;
1130 * Copy registers into sense buffer.
1133 desc
[3] = tf
->feature
; /* == error reg */
1134 desc
[5] = tf
->nsect
;
1137 desc
[11] = tf
->lbah
;
1138 desc
[12] = tf
->device
;
1139 desc
[13] = tf
->command
; /* == status reg */
1142 * Fill in Extend bit, and the high order bytes
1145 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1147 desc
[4] = tf
->hob_nsect
;
1148 desc
[6] = tf
->hob_lbal
;
1149 desc
[8] = tf
->hob_lbam
;
1150 desc
[10] = tf
->hob_lbah
;
1153 /* Fixed sense format */
1154 desc
[0] = tf
->feature
;
1155 desc
[1] = tf
->command
; /* status */
1156 desc
[2] = tf
->device
;
1157 desc
[3] = tf
->nsect
;
1159 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1163 if (tf
->hob_lbal
|| tf
->hob_lbam
|| tf
->hob_lbah
)
1167 desc
[10] = tf
->lbam
;
1168 desc
[11] = tf
->lbah
;
1173 * ata_gen_ata_sense - generate a SCSI fixed sense block
1174 * @qc: Command that we are erroring out
1176 * Generate sense block for a failed ATA command @qc. Descriptor
1177 * format is used to accommodate LBA48 block address.
1182 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1184 struct ata_device
*dev
= qc
->dev
;
1185 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1186 struct ata_taskfile
*tf
= &qc
->result_tf
;
1187 unsigned char *sb
= cmd
->sense_buffer
;
1188 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1190 u8 sense_key
, asc
, ascq
;
1192 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1194 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1196 if (ata_dev_disabled(dev
)) {
1197 /* Device disabled after error recovery */
1198 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1199 ata_scsi_set_sense(dev
, cmd
, NOT_READY
, 0x04, 0x21);
1202 /* Use ata_to_sense_error() to map status register bits
1203 * onto sense key, asc & ascq.
1206 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1207 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1208 &sense_key
, &asc
, &ascq
, verbose
);
1209 ata_scsi_set_sense(dev
, cmd
, sense_key
, asc
, ascq
);
1211 /* Could not decode error */
1212 ata_dev_warn(dev
, "could not decode error status 0x%x err_mask 0x%x\n",
1213 tf
->command
, qc
->err_mask
);
1214 ata_scsi_set_sense(dev
, cmd
, ABORTED_COMMAND
, 0, 0);
1218 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1219 if (block
== U64_MAX
)
1222 scsi_set_sense_information(sb
, SCSI_SENSE_BUFFERSIZE
, block
);
1225 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1227 sdev
->use_10_for_rw
= 1;
1228 sdev
->use_10_for_ms
= 1;
1229 sdev
->no_write_same
= 1;
1231 /* Schedule policy is determined by ->qc_defer() callback and
1232 * it needs to see every deferred qc. Set dev_blocked to 1 to
1233 * prevent SCSI midlayer from automatically deferring
1236 sdev
->max_device_blocked
= 1;
1240 * atapi_drain_needed - Check whether data transfer may overflow
1241 * @rq: request to be checked
1243 * ATAPI commands which transfer variable length data to host
1244 * might overflow due to application error or hardware bug. This
1245 * function checks whether overflow should be drained and ignored
1252 * 1 if ; otherwise, 0.
1254 static int atapi_drain_needed(struct request
*rq
)
1256 if (likely(!blk_rq_is_passthrough(rq
)))
1259 if (!blk_rq_bytes(rq
) || op_is_write(req_op(rq
)))
1262 return atapi_cmd_type(scsi_req(rq
)->cmd
[0]) == ATAPI_MISC
;
1265 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1266 struct ata_device
*dev
)
1268 struct request_queue
*q
= sdev
->request_queue
;
1270 if (!ata_id_has_unload(dev
->id
))
1271 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1273 /* configure max sectors */
1274 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1276 if (dev
->class == ATA_DEV_ATAPI
) {
1279 sdev
->sector_size
= ATA_SECT_SIZE
;
1281 /* set DMA padding */
1282 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1284 /* configure draining */
1285 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1287 ata_dev_err(dev
, "drain buffer allocation failed\n");
1291 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1293 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1294 sdev
->manage_start_stop
= 1;
1298 * ata_pio_sectors() expects buffer for each sector to not cross
1299 * page boundary. Enforce it by requiring buffers to be sector
1300 * aligned, which works iff sector_size is not larger than
1301 * PAGE_SIZE. ATAPI devices also need the alignment as
1302 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1304 if (sdev
->sector_size
> PAGE_SIZE
)
1306 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1309 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1311 if (dev
->flags
& ATA_DFLAG_AN
)
1312 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1314 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1317 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1318 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1319 scsi_change_queue_depth(sdev
, depth
);
1322 blk_queue_flush_queueable(q
, false);
1324 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
1325 sdev
->security_supported
= 1;
1332 * ata_scsi_slave_config - Set SCSI device attributes
1333 * @sdev: SCSI device to examine
1335 * This is called before we actually start reading
1336 * and writing to the device, to configure certain
1337 * SCSI mid-layer behaviors.
1340 * Defined by SCSI layer. We don't really care.
1343 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1345 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1346 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1349 ata_scsi_sdev_config(sdev
);
1352 rc
= ata_scsi_dev_config(sdev
, dev
);
1358 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1359 * @sdev: SCSI device to be destroyed
1361 * @sdev is about to be destroyed for hot/warm unplugging. If
1362 * this unplugging was initiated by libata as indicated by NULL
1363 * dev->sdev, this function doesn't have to do anything.
1364 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1365 * Clear dev->sdev, schedule the device for ATA detach and invoke
1369 * Defined by SCSI layer. We don't really care.
1371 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1373 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1374 struct request_queue
*q
= sdev
->request_queue
;
1375 unsigned long flags
;
1376 struct ata_device
*dev
;
1378 if (!ap
->ops
->error_handler
)
1381 spin_lock_irqsave(ap
->lock
, flags
);
1382 dev
= __ata_scsi_find_dev(ap
, sdev
);
1383 if (dev
&& dev
->sdev
) {
1384 /* SCSI device already in CANCEL state, no need to offline it */
1386 dev
->flags
|= ATA_DFLAG_DETACH
;
1387 ata_port_schedule_eh(ap
);
1389 spin_unlock_irqrestore(ap
->lock
, flags
);
1391 kfree(q
->dma_drain_buffer
);
1392 q
->dma_drain_buffer
= NULL
;
1393 q
->dma_drain_size
= 0;
1397 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1398 * @ap: ATA port to which the device change the queue depth
1399 * @sdev: SCSI device to configure queue depth for
1400 * @queue_depth: new queue depth
1402 * libsas and libata have different approaches for associating a sdev to
1406 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1409 struct ata_device
*dev
;
1410 unsigned long flags
;
1412 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1413 return sdev
->queue_depth
;
1415 dev
= ata_scsi_find_dev(ap
, sdev
);
1416 if (!dev
|| !ata_dev_enabled(dev
))
1417 return sdev
->queue_depth
;
1420 spin_lock_irqsave(ap
->lock
, flags
);
1421 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1422 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1423 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1426 spin_unlock_irqrestore(ap
->lock
, flags
);
1428 /* limit and apply queue depth */
1429 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1430 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1431 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1433 if (sdev
->queue_depth
== queue_depth
)
1436 return scsi_change_queue_depth(sdev
, queue_depth
);
1440 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1441 * @sdev: SCSI device to configure queue depth for
1442 * @queue_depth: new queue depth
1444 * This is libata standard hostt->change_queue_depth callback.
1445 * SCSI will call into this callback when user tries to set queue
1449 * SCSI layer (we don't care)
1452 * Newly configured queue depth.
1454 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1456 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1458 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1462 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1463 * @qc: Storage for translated ATA taskfile
1465 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1466 * (to start). Perhaps these commands should be preceded by
1467 * CHECK POWER MODE to see what power mode the device is already in.
1468 * [See SAT revision 5 at www.t10.org]
1471 * spin_lock_irqsave(host lock)
1474 * Zero on success, non-zero on error.
1476 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1478 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1479 struct ata_taskfile
*tf
= &qc
->tf
;
1480 const u8
*cdb
= scmd
->cmnd
;
1484 if (scmd
->cmd_len
< 5) {
1489 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1490 tf
->protocol
= ATA_PROT_NODATA
;
1492 ; /* ignore IMMED bit, violates sat-r05 */
1497 goto invalid_fld
; /* LOEJ bit set not supported */
1499 if (((cdb
[4] >> 4) & 0xf) != 0) {
1502 goto invalid_fld
; /* power conditions not supported */
1506 tf
->nsect
= 1; /* 1 sector, lba=0 */
1508 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1509 tf
->flags
|= ATA_TFLAG_LBA
;
1514 tf
->device
|= ATA_LBA
;
1517 tf
->lbal
= 0x1; /* sect */
1518 tf
->lbam
= 0x0; /* cyl low */
1519 tf
->lbah
= 0x0; /* cyl high */
1522 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1524 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1525 * or S5) causing some drives to spin up and down again.
1527 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1528 system_state
== SYSTEM_POWER_OFF
)
1531 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1532 system_entering_hibernation())
1535 /* Issue ATA STANDBY IMMEDIATE command */
1536 tf
->command
= ATA_CMD_STANDBYNOW1
;
1540 * Standby and Idle condition timers could be implemented but that
1541 * would require libata to implement the Power condition mode page
1542 * and allow the user to change it. Changing mode pages requires
1543 * MODE SELECT to be implemented.
1549 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
1552 scmd
->result
= SAM_STAT_GOOD
;
1558 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1559 * @qc: Storage for translated ATA taskfile
1561 * Sets up an ATA taskfile to issue FLUSH CACHE or
1565 * spin_lock_irqsave(host lock)
1568 * Zero on success, non-zero on error.
1570 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1572 struct ata_taskfile
*tf
= &qc
->tf
;
1574 tf
->flags
|= ATA_TFLAG_DEVICE
;
1575 tf
->protocol
= ATA_PROT_NODATA
;
1577 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1578 tf
->command
= ATA_CMD_FLUSH_EXT
;
1580 tf
->command
= ATA_CMD_FLUSH
;
1582 /* flush is critical for IO integrity, consider it an IO command */
1583 qc
->flags
|= ATA_QCFLAG_IO
;
1589 * scsi_6_lba_len - Get LBA and transfer length
1590 * @cdb: SCSI command to translate
1592 * Calculate LBA and transfer length for 6-byte commands.
1596 * @plen: the transfer length
1598 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1603 VPRINTK("six-byte command\n");
1605 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1606 lba
|= ((u64
)cdb
[2]) << 8;
1607 lba
|= ((u64
)cdb
[3]);
1616 * scsi_10_lba_len - Get LBA and transfer length
1617 * @cdb: SCSI command to translate
1619 * Calculate LBA and transfer length for 10-byte commands.
1623 * @plen: the transfer length
1625 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1630 VPRINTK("ten-byte command\n");
1632 lba
|= ((u64
)cdb
[2]) << 24;
1633 lba
|= ((u64
)cdb
[3]) << 16;
1634 lba
|= ((u64
)cdb
[4]) << 8;
1635 lba
|= ((u64
)cdb
[5]);
1637 len
|= ((u32
)cdb
[7]) << 8;
1638 len
|= ((u32
)cdb
[8]);
1645 * scsi_16_lba_len - Get LBA and transfer length
1646 * @cdb: SCSI command to translate
1648 * Calculate LBA and transfer length for 16-byte commands.
1652 * @plen: the transfer length
1654 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1659 VPRINTK("sixteen-byte command\n");
1661 lba
|= ((u64
)cdb
[2]) << 56;
1662 lba
|= ((u64
)cdb
[3]) << 48;
1663 lba
|= ((u64
)cdb
[4]) << 40;
1664 lba
|= ((u64
)cdb
[5]) << 32;
1665 lba
|= ((u64
)cdb
[6]) << 24;
1666 lba
|= ((u64
)cdb
[7]) << 16;
1667 lba
|= ((u64
)cdb
[8]) << 8;
1668 lba
|= ((u64
)cdb
[9]);
1670 len
|= ((u32
)cdb
[10]) << 24;
1671 len
|= ((u32
)cdb
[11]) << 16;
1672 len
|= ((u32
)cdb
[12]) << 8;
1673 len
|= ((u32
)cdb
[13]);
1680 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1681 * @qc: Storage for translated ATA taskfile
1683 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1686 * spin_lock_irqsave(host lock)
1689 * Zero on success, non-zero on error.
1691 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1693 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1694 struct ata_taskfile
*tf
= &qc
->tf
;
1695 struct ata_device
*dev
= qc
->dev
;
1696 u64 dev_sectors
= qc
->dev
->n_sectors
;
1697 const u8
*cdb
= scmd
->cmnd
;
1702 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1703 tf
->protocol
= ATA_PROT_NODATA
;
1705 if (cdb
[0] == VERIFY
) {
1706 if (scmd
->cmd_len
< 10) {
1710 scsi_10_lba_len(cdb
, &block
, &n_block
);
1711 } else if (cdb
[0] == VERIFY_16
) {
1712 if (scmd
->cmd_len
< 16) {
1716 scsi_16_lba_len(cdb
, &block
, &n_block
);
1724 if (block
>= dev_sectors
)
1726 if ((block
+ n_block
) > dev_sectors
)
1729 if (dev
->flags
& ATA_DFLAG_LBA
) {
1730 tf
->flags
|= ATA_TFLAG_LBA
;
1732 if (lba_28_ok(block
, n_block
)) {
1734 tf
->command
= ATA_CMD_VERIFY
;
1735 tf
->device
|= (block
>> 24) & 0xf;
1736 } else if (lba_48_ok(block
, n_block
)) {
1737 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1741 tf
->flags
|= ATA_TFLAG_LBA48
;
1742 tf
->command
= ATA_CMD_VERIFY_EXT
;
1744 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1746 tf
->hob_lbah
= (block
>> 40) & 0xff;
1747 tf
->hob_lbam
= (block
>> 32) & 0xff;
1748 tf
->hob_lbal
= (block
>> 24) & 0xff;
1750 /* request too large even for LBA48 */
1753 tf
->nsect
= n_block
& 0xff;
1755 tf
->lbah
= (block
>> 16) & 0xff;
1756 tf
->lbam
= (block
>> 8) & 0xff;
1757 tf
->lbal
= block
& 0xff;
1759 tf
->device
|= ATA_LBA
;
1762 u32 sect
, head
, cyl
, track
;
1764 if (!lba_28_ok(block
, n_block
))
1767 /* Convert LBA to CHS */
1768 track
= (u32
)block
/ dev
->sectors
;
1769 cyl
= track
/ dev
->heads
;
1770 head
= track
% dev
->heads
;
1771 sect
= (u32
)block
% dev
->sectors
+ 1;
1773 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1774 (u32
)block
, track
, cyl
, head
, sect
);
1776 /* Check whether the converted CHS can fit.
1780 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1783 tf
->command
= ATA_CMD_VERIFY
;
1784 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1787 tf
->lbah
= cyl
>> 8;
1794 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1798 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1799 /* "Logical Block Address out of range" */
1803 scmd
->result
= SAM_STAT_GOOD
;
1808 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1809 * @qc: Storage for translated ATA taskfile
1811 * Converts any of six SCSI read/write commands into the
1812 * ATA counterpart, including starting sector (LBA),
1813 * sector count, and taking into account the device's LBA48
1816 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1817 * %WRITE_16 are currently supported.
1820 * spin_lock_irqsave(host lock)
1823 * Zero on success, non-zero on error.
1825 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1827 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1828 const u8
*cdb
= scmd
->cmnd
;
1829 struct request
*rq
= scmd
->request
;
1830 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq
));
1831 unsigned int tf_flags
= 0;
1837 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1838 tf_flags
|= ATA_TFLAG_WRITE
;
1840 /* Calculate the SCSI LBA, transfer length and FUA. */
1844 if (unlikely(scmd
->cmd_len
< 10)) {
1848 scsi_10_lba_len(cdb
, &block
, &n_block
);
1849 if (cdb
[1] & (1 << 3))
1850 tf_flags
|= ATA_TFLAG_FUA
;
1854 if (unlikely(scmd
->cmd_len
< 6)) {
1858 scsi_6_lba_len(cdb
, &block
, &n_block
);
1860 /* for 6-byte r/w commands, transfer length 0
1861 * means 256 blocks of data, not 0 block.
1868 if (unlikely(scmd
->cmd_len
< 16)) {
1872 scsi_16_lba_len(cdb
, &block
, &n_block
);
1873 if (cdb
[1] & (1 << 3))
1874 tf_flags
|= ATA_TFLAG_FUA
;
1877 DPRINTK("no-byte command\n");
1882 /* Check and compose ATA command */
1884 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1885 * length 0 means transfer 0 block of data.
1886 * However, for ATA R/W commands, sector count 0 means
1887 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1889 * WARNING: one or two older ATA drives treat 0 as 0...
1893 qc
->flags
|= ATA_QCFLAG_IO
;
1894 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1896 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1899 if (likely(rc
== 0))
1904 /* treat all other errors as -EINVAL, fall through */
1906 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1910 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1911 /* "Logical Block Address out of range" */
1915 scmd
->result
= SAM_STAT_GOOD
;
1919 static void ata_qc_done(struct ata_queued_cmd
*qc
)
1921 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1922 void (*done
)(struct scsi_cmnd
*) = qc
->scsidone
;
1928 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1930 struct ata_port
*ap
= qc
->ap
;
1931 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1932 u8
*cdb
= cmd
->cmnd
;
1933 int need_sense
= (qc
->err_mask
!= 0);
1935 /* For ATA pass thru (SAT) commands, generate a sense block if
1936 * user mandated it or if there's an error. Note that if we
1937 * generate because the user forced us to [CK_COND =1], a check
1938 * condition is generated and the ATA register values are returned
1939 * whether the command completed successfully or not. If there
1940 * was no error, we use the following sense data:
1941 * sk = RECOVERED ERROR
1942 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1944 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1945 ((cdb
[2] & 0x20) || need_sense
))
1946 ata_gen_passthru_sense(qc
);
1947 else if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1948 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1949 else if (need_sense
)
1950 ata_gen_ata_sense(qc
);
1952 cmd
->result
= SAM_STAT_GOOD
;
1954 if (need_sense
&& !ap
->ops
->error_handler
)
1955 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1961 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1962 * @dev: ATA device to which the command is addressed
1963 * @cmd: SCSI command to execute
1964 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1966 * Our ->queuecommand() function has decided that the SCSI
1967 * command issued can be directly translated into an ATA
1968 * command, rather than handled internally.
1970 * This function sets up an ata_queued_cmd structure for the
1971 * SCSI command, and sends that ata_queued_cmd to the hardware.
1973 * The xlat_func argument (actor) returns 0 if ready to execute
1974 * ATA command, else 1 to finish translation. If 1 is returned
1975 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1976 * to be set reflecting an error condition or clean (early)
1980 * spin_lock_irqsave(host lock)
1983 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1984 * needs to be deferred.
1986 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1987 ata_xlat_func_t xlat_func
)
1989 struct ata_port
*ap
= dev
->link
->ap
;
1990 struct ata_queued_cmd
*qc
;
1995 qc
= ata_scsi_qc_new(dev
, cmd
);
1999 /* data is present; dma-map it */
2000 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
2001 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2002 if (unlikely(scsi_bufflen(cmd
) < 1)) {
2003 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
2007 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
2009 qc
->dma_dir
= cmd
->sc_data_direction
;
2012 qc
->complete_fn
= ata_scsi_qc_complete
;
2017 if (ap
->ops
->qc_defer
) {
2018 if ((rc
= ap
->ops
->qc_defer(qc
)))
2022 /* select device, send command to hardware */
2030 cmd
->scsi_done(cmd
);
2031 DPRINTK("EXIT - early finish (good or error)\n");
2036 cmd
->result
= (DID_ERROR
<< 16);
2037 cmd
->scsi_done(cmd
);
2039 DPRINTK("EXIT - internal\n");
2044 DPRINTK("EXIT - defer\n");
2045 if (rc
== ATA_DEFER_LINK
)
2046 return SCSI_MLQUEUE_DEVICE_BUSY
;
2048 return SCSI_MLQUEUE_HOST_BUSY
;
2051 struct ata_scsi_args
{
2052 struct ata_device
*dev
;
2054 struct scsi_cmnd
*cmd
;
2058 * ata_scsi_rbuf_get - Map response buffer.
2059 * @cmd: SCSI command containing buffer to be mapped.
2060 * @flags: unsigned long variable to store irq enable status
2061 * @copy_in: copy in from user buffer
2063 * Prepare buffer for simulated SCSI commands.
2066 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2069 * Pointer to response buffer.
2071 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
2072 unsigned long *flags
)
2074 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
2076 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
2078 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2079 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2080 return ata_scsi_rbuf
;
2084 * ata_scsi_rbuf_put - Unmap response buffer.
2085 * @cmd: SCSI command containing buffer to be unmapped.
2086 * @copy_out: copy out result
2087 * @flags: @flags passed to ata_scsi_rbuf_get()
2089 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2090 * @copy_back is true.
2093 * Unlocks ata_scsi_rbuf_lock.
2095 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
2096 unsigned long *flags
)
2099 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2100 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2101 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
2105 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2106 * @args: device IDENTIFY data / SCSI command of interest.
2107 * @actor: Callback hook for desired SCSI command simulator
2109 * Takes care of the hard work of simulating a SCSI command...
2110 * Mapping the response buffer, calling the command's handler,
2111 * and handling the handler's return value. This return value
2112 * indicates whether the handler wishes the SCSI command to be
2113 * completed successfully (0), or not (in which case cmd->result
2114 * and sense buffer are assumed to be set).
2117 * spin_lock_irqsave(host lock)
2119 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
2120 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
2124 struct scsi_cmnd
*cmd
= args
->cmd
;
2125 unsigned long flags
;
2127 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
2128 rc
= actor(args
, rbuf
);
2129 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
2132 cmd
->result
= SAM_STAT_GOOD
;
2136 * ata_scsiop_inq_std - Simulate INQUIRY command
2137 * @args: device IDENTIFY data / SCSI command of interest.
2138 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2140 * Returns standard device identification data associated
2141 * with non-VPD INQUIRY command output.
2144 * spin_lock_irqsave(host lock)
2146 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
2148 const u8 versions
[] = {
2150 0x60, /* SAM-3 (no version claimed) */
2153 0x20, /* SBC-2 (no version claimed) */
2156 0x00 /* SPC-3 (no version claimed) */
2158 const u8 versions_zbc
[] = {
2160 0xA0, /* SAM-5 (no version claimed) */
2163 0x00, /* SBC-4 (no version claimed) */
2166 0xC0, /* SPC-5 (no version claimed) */
2175 0x5, /* claim SPC-3 version compatibility */
2185 /* set scsi removable (RMB) bit per ata bit, or if the
2186 * AHCI port says it's external (Hotplug-capable, eSATA).
2188 if (ata_id_removable(args
->id
) ||
2189 (args
->dev
->link
->ap
->pflags
& ATA_PFLAG_EXTERNAL
))
2192 if (args
->dev
->class == ATA_DEV_ZAC
) {
2194 hdr
[2] = 0x7; /* claim SPC-5 version compatibility */
2197 memcpy(rbuf
, hdr
, sizeof(hdr
));
2198 memcpy(&rbuf
[8], "ATA ", 8);
2199 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2201 /* From SAT, use last 2 words from fw rev unless they are spaces */
2202 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2203 if (strncmp(&rbuf
[32], " ", 4) == 0)
2204 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2206 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2207 memcpy(&rbuf
[32], "n/a ", 4);
2209 if (ata_id_zoned_cap(args
->id
) || args
->dev
->class == ATA_DEV_ZAC
)
2210 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2212 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2218 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2219 * @args: device IDENTIFY data / SCSI command of interest.
2220 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2222 * Returns list of inquiry VPD pages available.
2225 * spin_lock_irqsave(host lock)
2227 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2230 const u8 pages
[] = {
2231 0x00, /* page 0x00, this page */
2232 0x80, /* page 0x80, unit serial no page */
2233 0x83, /* page 0x83, device ident page */
2234 0x89, /* page 0x89, ata info page */
2235 0xb0, /* page 0xb0, block limits page */
2236 0xb1, /* page 0xb1, block device characteristics page */
2237 0xb2, /* page 0xb2, thin provisioning page */
2238 0xb6, /* page 0xb6, zoned block device characteristics */
2241 num_pages
= sizeof(pages
);
2242 if (!(args
->dev
->flags
& ATA_DFLAG_ZAC
))
2244 rbuf
[3] = num_pages
; /* number of supported VPD pages */
2245 memcpy(rbuf
+ 4, pages
, num_pages
);
2250 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2251 * @args: device IDENTIFY data / SCSI command of interest.
2252 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2254 * Returns ATA device serial number.
2257 * spin_lock_irqsave(host lock)
2259 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2263 0x80, /* this page code */
2265 ATA_ID_SERNO_LEN
, /* page len */
2268 memcpy(rbuf
, hdr
, sizeof(hdr
));
2269 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2270 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2275 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2276 * @args: device IDENTIFY data / SCSI command of interest.
2277 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2279 * Yields two logical unit device identification designators:
2280 * - vendor specific ASCII containing the ATA serial number
2281 * - SAT defined "t10 vendor id based" containing ASCII vendor
2282 * name ("ATA "), model and serial numbers.
2285 * spin_lock_irqsave(host lock)
2287 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2289 const int sat_model_serial_desc_len
= 68;
2292 rbuf
[1] = 0x83; /* this page code */
2295 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2297 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2299 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2300 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2301 num
+= ATA_ID_SERNO_LEN
;
2303 /* SAT defined lu model and serial numbers descriptor */
2304 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2307 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2309 memcpy(rbuf
+ num
, "ATA ", 8);
2311 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2313 num
+= ATA_ID_PROD_LEN
;
2314 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2316 num
+= ATA_ID_SERNO_LEN
;
2318 if (ata_id_has_wwn(args
->id
)) {
2319 /* SAT defined lu world wide name */
2320 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2323 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2325 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2326 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2327 num
+= ATA_ID_WWN_LEN
;
2329 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2334 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2335 * @args: device IDENTIFY data / SCSI command of interest.
2336 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2338 * Yields SAT-specified ATA VPD page.
2341 * spin_lock_irqsave(host lock)
2343 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2345 struct ata_taskfile tf
;
2347 memset(&tf
, 0, sizeof(tf
));
2349 rbuf
[1] = 0x89; /* our page code */
2350 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2351 rbuf
[3] = (0x238 & 0xff);
2353 memcpy(&rbuf
[8], "linux ", 8);
2354 memcpy(&rbuf
[16], "libata ", 16);
2355 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2357 /* we don't store the ATA device signature, so we fake it */
2359 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2363 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2364 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2366 rbuf
[56] = ATA_CMD_ID_ATA
;
2368 memcpy(&rbuf
[60], &args
->id
[0], 512);
2372 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2377 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2380 * Optimal transfer length granularity.
2382 * This is always one physical block, but for disks with a smaller
2383 * logical than physical sector size we need to figure out what the
2386 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2387 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2390 * Optimal unmap granularity.
2392 * The ATA spec doesn't even know about a granularity or alignment
2393 * for the TRIM command. We can leave away most of the unmap related
2394 * VPD page entries, but we have specifify a granularity to signal
2395 * that we support some form of unmap - in thise case via WRITE SAME
2396 * with the unmap bit set.
2398 if (ata_id_has_trim(args
->id
)) {
2399 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM
, &rbuf
[36]);
2400 put_unaligned_be32(1, &rbuf
[28]);
2406 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2408 int form_factor
= ata_id_form_factor(args
->id
);
2409 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2410 u8 zoned
= ata_id_zoned_cap(args
->id
);
2414 rbuf
[4] = media_rotation_rate
>> 8;
2415 rbuf
[5] = media_rotation_rate
;
2416 rbuf
[7] = form_factor
;
2418 rbuf
[8] = (zoned
<< 4);
2423 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2425 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2428 rbuf
[5] = 1 << 6; /* TPWS */
2433 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args
*args
, u8
*rbuf
)
2436 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2442 * URSWRZ bit is only meaningful for host-managed ZAC drives
2444 if (args
->dev
->zac_zoned_cap
& 1)
2446 put_unaligned_be32(args
->dev
->zac_zones_optimal_open
, &rbuf
[8]);
2447 put_unaligned_be32(args
->dev
->zac_zones_optimal_nonseq
, &rbuf
[12]);
2448 put_unaligned_be32(args
->dev
->zac_zones_max_open
, &rbuf
[16]);
2454 * modecpy - Prepare response for MODE SENSE
2455 * @dest: output buffer
2456 * @src: data being copied
2457 * @n: length of mode page
2458 * @changeable: whether changeable parameters are requested
2460 * Generate a generic MODE SENSE page for either current or changeable
2466 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2469 memcpy(dest
, src
, 2);
2470 memset(dest
+ 2, 0, n
- 2);
2472 memcpy(dest
, src
, n
);
2477 * ata_msense_caching - Simulate MODE SENSE caching info page
2478 * @id: device IDENTIFY data
2479 * @buf: output buffer
2480 * @changeable: whether changeable parameters are requested
2482 * Generate a caching info page, which conditionally indicates
2483 * write caching to the SCSI layer, depending on device
2489 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2491 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2493 buf
[2] |= (1 << 2); /* ata_mselect_caching() */
2495 buf
[2] |= (ata_id_wcache_enabled(id
) << 2); /* write cache enable */
2496 buf
[12] |= (!ata_id_rahead_enabled(id
) << 5); /* disable read ahead */
2498 return sizeof(def_cache_mpage
);
2502 * ata_msense_control - Simulate MODE SENSE control mode page
2503 * @dev: ATA device of interest
2504 * @buf: output buffer
2505 * @changeable: whether changeable parameters are requested
2507 * Generate a generic MODE SENSE control mode page.
2512 static unsigned int ata_msense_control(struct ata_device
*dev
, u8
*buf
,
2515 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2517 buf
[2] |= (1 << 2); /* ata_mselect_control() */
2519 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
2521 buf
[2] |= (d_sense
<< 2); /* descriptor format sense data */
2523 return sizeof(def_control_mpage
);
2527 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2528 * @buf: output buffer
2529 * @changeable: whether changeable parameters are requested
2531 * Generate a generic MODE SENSE r/w error recovery page.
2536 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2538 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2540 return sizeof(def_rw_recovery_mpage
);
2544 * We can turn this into a real blacklist if it's needed, for now just
2545 * blacklist any Maxtor BANC1G10 revision firmware
2547 static int ata_dev_supports_fua(u16
*id
)
2549 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2553 if (!ata_id_has_fua(id
))
2556 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2557 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2559 if (strcmp(model
, "Maxtor"))
2561 if (strcmp(fw
, "BANC1G10"))
2564 return 0; /* blacklisted */
2568 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2569 * @args: device IDENTIFY data / SCSI command of interest.
2570 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2572 * Simulate MODE SENSE commands. Assume this is invoked for direct
2573 * access devices (e.g. disks) only. There should be no block
2574 * descriptor for other device types.
2577 * spin_lock_irqsave(host lock)
2579 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2581 struct ata_device
*dev
= args
->dev
;
2582 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2583 const u8 sat_blk_desc
[] = {
2584 0, 0, 0, 0, /* number of blocks: sat unspecified */
2586 0, 0x2, 0x0 /* block length: 512 bytes */
2589 unsigned int ebd
, page_control
, six_byte
;
2590 u8 dpofua
, bp
= 0xff;
2595 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2596 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2598 * LLBA bit in msense(10) ignored (compliant)
2601 page_control
= scsicmd
[2] >> 6;
2602 switch (page_control
) {
2603 case 0: /* current */
2604 case 1: /* changeable */
2605 case 2: /* defaults */
2606 break; /* supported */
2608 goto saving_not_supp
;
2616 p
+= 4 + (ebd
? 8 : 0);
2618 p
+= 8 + (ebd
? 8 : 0);
2620 pg
= scsicmd
[2] & 0x3f;
2623 * No mode subpages supported (yet) but asking for _all_
2624 * subpages may be valid
2626 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
2632 case RW_RECOVERY_MPAGE
:
2633 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2637 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2641 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2645 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2646 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2647 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2650 default: /* invalid page code */
2656 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2657 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2661 rbuf
[0] = p
- rbuf
- 1;
2664 rbuf
[3] = sizeof(sat_blk_desc
);
2665 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2668 unsigned int output_len
= p
- rbuf
- 2;
2670 rbuf
[0] = output_len
>> 8;
2671 rbuf
[1] = output_len
;
2674 rbuf
[7] = sizeof(sat_blk_desc
);
2675 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2681 ata_scsi_set_invalid_field(dev
, args
->cmd
, fp
, bp
);
2685 ata_scsi_set_sense(dev
, args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2686 /* "Saving parameters not supported" */
2691 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2692 * @args: device IDENTIFY data / SCSI command of interest.
2693 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2695 * Simulate READ CAPACITY commands.
2700 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2702 struct ata_device
*dev
= args
->dev
;
2703 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2704 u32 sector_size
; /* physical sector size in bytes */
2708 sector_size
= ata_id_logical_sector_size(dev
->id
);
2709 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2710 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2714 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2715 if (last_lba
>= 0xffffffffULL
)
2716 last_lba
= 0xffffffff;
2718 /* sector count, 32-bit */
2719 rbuf
[0] = last_lba
>> (8 * 3);
2720 rbuf
[1] = last_lba
>> (8 * 2);
2721 rbuf
[2] = last_lba
>> (8 * 1);
2725 rbuf
[4] = sector_size
>> (8 * 3);
2726 rbuf
[5] = sector_size
>> (8 * 2);
2727 rbuf
[6] = sector_size
>> (8 * 1);
2728 rbuf
[7] = sector_size
;
2730 /* sector count, 64-bit */
2731 rbuf
[0] = last_lba
>> (8 * 7);
2732 rbuf
[1] = last_lba
>> (8 * 6);
2733 rbuf
[2] = last_lba
>> (8 * 5);
2734 rbuf
[3] = last_lba
>> (8 * 4);
2735 rbuf
[4] = last_lba
>> (8 * 3);
2736 rbuf
[5] = last_lba
>> (8 * 2);
2737 rbuf
[6] = last_lba
>> (8 * 1);
2741 rbuf
[ 8] = sector_size
>> (8 * 3);
2742 rbuf
[ 9] = sector_size
>> (8 * 2);
2743 rbuf
[10] = sector_size
>> (8 * 1);
2744 rbuf
[11] = sector_size
;
2747 rbuf
[13] = log2_per_phys
;
2748 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2749 rbuf
[15] = lowest_aligned
;
2751 if (ata_id_has_trim(args
->id
) &&
2752 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2753 rbuf
[14] |= 0x80; /* LBPME */
2755 if (ata_id_has_zero_after_trim(args
->id
) &&
2756 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2757 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2758 rbuf
[14] |= 0x40; /* LBPRZ */
2761 if (ata_id_zoned_cap(args
->id
) ||
2762 args
->dev
->class == ATA_DEV_ZAC
)
2763 rbuf
[12] = (1 << 4); /* RC_BASIS */
2769 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2770 * @args: device IDENTIFY data / SCSI command of interest.
2771 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2773 * Simulate REPORT LUNS command.
2776 * spin_lock_irqsave(host lock)
2778 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2781 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2786 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2788 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2789 /* FIXME: not quite right; we don't want the
2790 * translation of taskfile registers into
2791 * a sense descriptors, since that's only
2792 * correct for ATA, not ATAPI
2794 ata_gen_passthru_sense(qc
);
2800 /* is it pointless to prefer PIO for "safety reasons"? */
2801 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2803 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2806 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2808 struct ata_port
*ap
= qc
->ap
;
2809 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2811 DPRINTK("ATAPI request sense\n");
2813 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2815 #ifdef CONFIG_ATA_SFF
2816 if (ap
->ops
->sff_tf_read
)
2817 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2820 /* fill these in, for the case where they are -not- overwritten */
2821 cmd
->sense_buffer
[0] = 0x70;
2822 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2826 /* setup sg table and init transfer direction */
2827 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2828 ata_sg_init(qc
, &qc
->sgent
, 1);
2829 qc
->dma_dir
= DMA_FROM_DEVICE
;
2831 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2832 qc
->cdb
[0] = REQUEST_SENSE
;
2833 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2835 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2836 qc
->tf
.command
= ATA_CMD_PACKET
;
2838 if (ata_pio_use_silly(ap
)) {
2839 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2840 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2842 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2843 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2846 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2848 qc
->complete_fn
= atapi_sense_complete
;
2856 * ATAPI devices typically report zero for their SCSI version, and sometimes
2857 * deviate from the spec WRT response data format. If SCSI version is
2858 * reported as zero like normal, then we make the following fixups:
2859 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2861 * 2) Ensure response data format / ATAPI information are always correct.
2863 static void atapi_fixup_inquiry(struct scsi_cmnd
*cmd
)
2867 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2872 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, 4);
2875 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2877 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2878 unsigned int err_mask
= qc
->err_mask
;
2880 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2882 /* handle completion from new EH */
2883 if (unlikely(qc
->ap
->ops
->error_handler
&&
2884 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2886 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2887 /* FIXME: not quite right; we don't want the
2888 * translation of taskfile registers into a
2889 * sense descriptors, since that's only
2890 * correct for ATA, not ATAPI
2892 ata_gen_passthru_sense(qc
);
2895 /* SCSI EH automatically locks door if sdev->locked is
2896 * set. Sometimes door lock request continues to
2897 * fail, for example, when no media is present. This
2898 * creates a loop - SCSI EH issues door lock which
2899 * fails and gets invoked again to acquire sense data
2900 * for the failed command.
2902 * If door lock fails, always clear sdev->locked to
2903 * avoid this infinite loop.
2905 * This may happen before SCSI scan is complete. Make
2906 * sure qc->dev->sdev isn't NULL before dereferencing.
2908 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2909 qc
->dev
->sdev
->locked
= 0;
2911 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2916 /* successful completion or old EH failure path */
2917 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2918 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2919 atapi_request_sense(qc
);
2921 } else if (unlikely(err_mask
)) {
2922 /* FIXME: not quite right; we don't want the
2923 * translation of taskfile registers into
2924 * a sense descriptors, since that's only
2925 * correct for ATA, not ATAPI
2927 ata_gen_passthru_sense(qc
);
2929 if (cmd
->cmnd
[0] == INQUIRY
&& (cmd
->cmnd
[1] & 0x03) == 0)
2930 atapi_fixup_inquiry(cmd
);
2931 cmd
->result
= SAM_STAT_GOOD
;
2937 * atapi_xlat - Initialize PACKET taskfile
2938 * @qc: command structure to be initialized
2941 * spin_lock_irqsave(host lock)
2944 * Zero on success, non-zero on failure.
2946 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2948 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2949 struct ata_device
*dev
= qc
->dev
;
2950 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2951 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2952 unsigned int nbytes
;
2954 memset(qc
->cdb
, 0, dev
->cdb_len
);
2955 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2957 qc
->complete_fn
= atapi_qc_complete
;
2959 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2960 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2961 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2962 DPRINTK("direction: write\n");
2965 qc
->tf
.command
= ATA_CMD_PACKET
;
2966 ata_qc_set_pc_nbytes(qc
);
2968 /* check whether ATAPI DMA is safe */
2969 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2972 /* Some controller variants snoop this value for Packet
2973 * transfers to do state machine and FIFO management. Thus we
2974 * want to set it properly, and for DMA where it is
2975 * effectively meaningless.
2977 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2979 /* Most ATAPI devices which honor transfer chunk size don't
2980 * behave according to the spec when odd chunk size which
2981 * matches the transfer length is specified. If the number of
2982 * bytes to transfer is 2n+1. According to the spec, what
2983 * should happen is to indicate that 2n+1 is going to be
2984 * transferred and transfer 2n+2 bytes where the last byte is
2987 * In practice, this doesn't happen. ATAPI devices first
2988 * indicate and transfer 2n bytes and then indicate and
2989 * transfer 2 bytes where the last byte is padding.
2991 * This inconsistency confuses several controllers which
2992 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2993 * These controllers use actual number of transferred bytes to
2994 * update DMA poitner and transfer of 4n+2 bytes make those
2995 * controller push DMA pointer by 4n+4 bytes because SATA data
2996 * FISes are aligned to 4 bytes. This causes data corruption
2997 * and buffer overrun.
2999 * Always setting nbytes to even number solves this problem
3000 * because then ATAPI devices don't have to split data at 2n
3006 qc
->tf
.lbam
= (nbytes
& 0xFF);
3007 qc
->tf
.lbah
= (nbytes
>> 8);
3010 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
3012 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
3015 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
3016 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
3018 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
3019 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
3020 /* some SATA bridges need us to indicate data xfer direction */
3021 qc
->tf
.feature
|= ATAPI_DMADIR
;
3025 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3026 as ATAPI tape drives don't get this right otherwise */
3030 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
3032 if (!sata_pmp_attached(ap
)) {
3033 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
3034 return &ap
->link
.device
[devno
];
3036 if (likely(devno
< ap
->nr_pmp_links
))
3037 return &ap
->pmp_link
[devno
].device
[0];
3043 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
3044 const struct scsi_device
*scsidev
)
3048 /* skip commands not addressed to targets we simulate */
3049 if (!sata_pmp_attached(ap
)) {
3050 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
3052 devno
= scsidev
->id
;
3054 if (unlikely(scsidev
->id
|| scsidev
->lun
))
3056 devno
= scsidev
->channel
;
3059 return ata_find_dev(ap
, devno
);
3063 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3064 * @ap: ATA port to which the device is attached
3065 * @scsidev: SCSI device from which we derive the ATA device
3067 * Given various information provided in struct scsi_cmnd,
3068 * map that onto an ATA bus, and using that mapping
3069 * determine which ata_device is associated with the
3070 * SCSI command to be sent.
3073 * spin_lock_irqsave(host lock)
3076 * Associated ATA device, or %NULL if not found.
3078 static struct ata_device
*
3079 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
3081 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
3083 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
3090 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3091 * @byte1: Byte 1 from pass-thru CDB.
3094 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3097 ata_scsi_map_proto(u8 byte1
)
3099 switch((byte1
& 0x1e) >> 1) {
3100 case 3: /* Non-data */
3101 return ATA_PROT_NODATA
;
3104 case 10: /* UDMA Data-in */
3105 case 11: /* UDMA Data-Out */
3106 return ATA_PROT_DMA
;
3108 case 4: /* PIO Data-in */
3109 case 5: /* PIO Data-out */
3110 return ATA_PROT_PIO
;
3112 case 12: /* FPDMA */
3113 return ATA_PROT_NCQ
;
3115 case 0: /* Hard Reset */
3117 case 8: /* Device Diagnostic */
3118 case 9: /* Device Reset */
3119 case 7: /* DMA Queued */
3120 case 15: /* Return Response Info */
3121 default: /* Reserved */
3125 return ATA_PROT_UNKNOWN
;
3129 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3130 * @qc: command structure to be initialized
3132 * Handles either 12, 16, or 32-byte versions of the CDB.
3135 * Zero on success, non-zero on failure.
3137 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
3139 struct ata_taskfile
*tf
= &(qc
->tf
);
3140 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3141 struct ata_device
*dev
= qc
->dev
;
3142 const u8
*cdb
= scmd
->cmnd
;
3146 /* 7Fh variable length cmd means a ata pass-thru(32) */
3147 if (cdb
[0] == VARIABLE_LENGTH_CMD
)
3150 tf
->protocol
= ata_scsi_map_proto(cdb
[1 + cdb_offset
]);
3151 if (tf
->protocol
== ATA_PROT_UNKNOWN
) {
3156 if (ata_is_ncq(tf
->protocol
) && (cdb
[2 + cdb_offset
] & 0x3) == 0)
3157 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3160 tf
->flags
|= ATA_TFLAG_LBA
;
3163 * 12 and 16 byte CDBs use different offsets to
3164 * provide the various register values.
3166 if (cdb
[0] == ATA_16
) {
3168 * 16-byte CDB - may contain extended commands.
3170 * If that is the case, copy the upper byte register values.
3172 if (cdb
[1] & 0x01) {
3173 tf
->hob_feature
= cdb
[3];
3174 tf
->hob_nsect
= cdb
[5];
3175 tf
->hob_lbal
= cdb
[7];
3176 tf
->hob_lbam
= cdb
[9];
3177 tf
->hob_lbah
= cdb
[11];
3178 tf
->flags
|= ATA_TFLAG_LBA48
;
3180 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3183 * Always copy low byte, device and command registers.
3185 tf
->feature
= cdb
[4];
3190 tf
->device
= cdb
[13];
3191 tf
->command
= cdb
[14];
3192 } else if (cdb
[0] == ATA_12
) {
3194 * 12-byte CDB - incapable of extended commands.
3196 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3198 tf
->feature
= cdb
[3];
3203 tf
->device
= cdb
[8];
3204 tf
->command
= cdb
[9];
3207 * 32-byte CDB - may contain extended command fields.
3209 * If that is the case, copy the upper byte register values.
3211 if (cdb
[10] & 0x01) {
3212 tf
->hob_feature
= cdb
[20];
3213 tf
->hob_nsect
= cdb
[22];
3214 tf
->hob_lbal
= cdb
[16];
3215 tf
->hob_lbam
= cdb
[15];
3216 tf
->hob_lbah
= cdb
[14];
3217 tf
->flags
|= ATA_TFLAG_LBA48
;
3219 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3221 tf
->feature
= cdb
[21];
3222 tf
->nsect
= cdb
[23];
3226 tf
->device
= cdb
[24];
3227 tf
->command
= cdb
[25];
3228 tf
->auxiliary
= get_unaligned_be32(&cdb
[28]);
3231 /* For NCQ commands copy the tag value */
3232 if (ata_is_ncq(tf
->protocol
))
3233 tf
->nsect
= qc
->tag
<< 3;
3235 /* enforce correct master/slave bit */
3236 tf
->device
= dev
->devno
?
3237 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3239 switch (tf
->command
) {
3240 /* READ/WRITE LONG use a non-standard sect_size */
3241 case ATA_CMD_READ_LONG
:
3242 case ATA_CMD_READ_LONG_ONCE
:
3243 case ATA_CMD_WRITE_LONG
:
3244 case ATA_CMD_WRITE_LONG_ONCE
:
3245 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1) {
3249 qc
->sect_size
= scsi_bufflen(scmd
);
3252 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3253 case ATA_CMD_CFA_WRITE_NE
:
3254 case ATA_CMD_CFA_TRANS_SECT
:
3255 case ATA_CMD_CFA_WRITE_MULT_NE
:
3256 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3258 case ATA_CMD_READ_EXT
:
3259 case ATA_CMD_READ_QUEUED
:
3260 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3261 case ATA_CMD_FPDMA_READ
:
3262 case ATA_CMD_READ_MULTI
:
3263 case ATA_CMD_READ_MULTI_EXT
:
3264 case ATA_CMD_PIO_READ
:
3265 case ATA_CMD_PIO_READ_EXT
:
3266 case ATA_CMD_READ_STREAM_DMA_EXT
:
3267 case ATA_CMD_READ_STREAM_EXT
:
3268 case ATA_CMD_VERIFY
:
3269 case ATA_CMD_VERIFY_EXT
:
3271 case ATA_CMD_WRITE_EXT
:
3272 case ATA_CMD_WRITE_FUA_EXT
:
3273 case ATA_CMD_WRITE_QUEUED
:
3274 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3275 case ATA_CMD_FPDMA_WRITE
:
3276 case ATA_CMD_WRITE_MULTI
:
3277 case ATA_CMD_WRITE_MULTI_EXT
:
3278 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3279 case ATA_CMD_PIO_WRITE
:
3280 case ATA_CMD_PIO_WRITE_EXT
:
3281 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3282 case ATA_CMD_WRITE_STREAM_EXT
:
3283 qc
->sect_size
= scmd
->device
->sector_size
;
3286 /* Everything else uses 512 byte "sectors" */
3288 qc
->sect_size
= ATA_SECT_SIZE
;
3292 * Set flags so that all registers will be written, pass on
3293 * write indication (used for PIO/DMA setup), result TF is
3294 * copied back and we don't whine too much about its failure.
3296 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3297 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3298 tf
->flags
|= ATA_TFLAG_WRITE
;
3300 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3303 * Set transfer length.
3305 * TODO: find out if we need to do more here to
3306 * cover scatter/gather case.
3308 ata_qc_set_pc_nbytes(qc
);
3310 /* We may not issue DMA commands if no DMA mode is set */
3311 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0) {
3316 /* sanity check for pio multi commands */
3317 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
)) {
3322 if (is_multi_taskfile(tf
)) {
3323 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3325 /* compare the passed through multi_count
3326 * with the cached multi_count of libata
3328 if (multi_count
!= dev
->multi_count
)
3329 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3334 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3335 * SET_FEATURES - XFER MODE must be preceded/succeeded
3336 * by an update to hardware-specific registers for each
3337 * controller (i.e. the reason for ->set_piomode(),
3338 * ->set_dmamode(), and ->post_set_mode() hooks).
3340 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3341 tf
->feature
== SETFEATURES_XFER
) {
3342 fp
= (cdb
[0] == ATA_16
) ? 4 : 3;
3347 * Filter TPM commands by default. These provide an
3348 * essentially uncontrolled encrypted "back door" between
3349 * applications and the disk. Set libata.allow_tpm=1 if you
3350 * have a real reason for wanting to use them. This ensures
3351 * that installed software cannot easily mess stuff up without
3352 * user intent. DVR type users will probably ship with this enabled
3353 * for movie content management.
3355 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3356 * for this and should do in future but that it is not sufficient as
3357 * DCS is an optional feature set. Thus we also do the software filter
3358 * so that we comply with the TC consortium stated goal that the user
3359 * can turn off TC features of their system.
3361 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
) {
3362 fp
= (cdb
[0] == ATA_16
) ? 14 : 9;
3369 ata_scsi_set_invalid_field(dev
, scmd
, fp
, 0xff);
3374 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3375 * @cmd: SCSI command being translated
3376 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3377 * @sector: Starting sector
3378 * @count: Total Range of request in logical sectors
3380 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3383 * Upto 64 entries of the format:
3384 * 63:48 Range Length
3387 * Range Length of 0 is ignored.
3388 * LBA's should be sorted order and not overlap.
3390 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3392 * Return: Number of bytes copied into sglist.
3394 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd
*cmd
, u32 trmax
,
3395 u64 sector
, u32 count
)
3397 struct scsi_device
*sdp
= cmd
->device
;
3398 size_t len
= sdp
->sector_size
;
3402 unsigned long flags
;
3404 WARN_ON(len
> ATA_SCSI_RBUF_SIZE
);
3406 if (len
> ATA_SCSI_RBUF_SIZE
)
3407 len
= ATA_SCSI_RBUF_SIZE
;
3409 spin_lock_irqsave(&ata_scsi_rbuf_lock
, flags
);
3410 buf
= ((void *)ata_scsi_rbuf
);
3411 memset(buf
, 0, len
);
3413 u64 entry
= sector
|
3414 ((u64
)(count
> 0xffff ? 0xffff : count
) << 48);
3415 buf
[i
++] = __cpu_to_le64(entry
);
3416 if (count
<= 0xffff)
3421 r
= sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, len
);
3422 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, flags
);
3428 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3429 * @qc: Command to be translated
3431 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3432 * an SCT Write Same command.
3433 * Based on WRITE SAME has the UNMAP flag:
3435 * - When set translate to DSM TRIM
3436 * - When clear translate to SCT Write Same
3438 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3440 struct ata_taskfile
*tf
= &qc
->tf
;
3441 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3442 struct scsi_device
*sdp
= scmd
->device
;
3443 size_t len
= sdp
->sector_size
;
3444 struct ata_device
*dev
= qc
->dev
;
3445 const u8
*cdb
= scmd
->cmnd
;
3448 const u32 trmax
= len
>> 3;
3452 u8 unmap
= cdb
[1] & 0x8;
3454 /* we may not issue DMA commands if no DMA mode is set */
3455 if (unlikely(!dev
->dma_mode
))
3456 goto invalid_opcode
;
3459 * We only allow sending this command through the block layer,
3460 * as it modifies the DATA OUT buffer, which would corrupt user
3461 * memory for SG_IO commands.
3463 if (unlikely(blk_rq_is_passthrough(scmd
->request
)))
3464 goto invalid_opcode
;
3466 if (unlikely(scmd
->cmd_len
< 16)) {
3470 scsi_16_lba_len(cdb
, &block
, &n_block
);
3473 (dev
->horkage
& ATA_HORKAGE_NOTRIM
) ||
3474 !ata_id_has_trim(dev
->id
)) {
3479 /* If the request is too large the cmd is invalid */
3480 if (n_block
> 0xffff * trmax
) {
3486 * WRITE SAME always has a sector sized buffer as payload, this
3487 * should never be a multiple entry S/G list.
3489 if (!scsi_sg_count(scmd
))
3490 goto invalid_param_len
;
3493 * size must match sector size in bytes
3494 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3495 * is defined as number of 512 byte blocks to be transferred.
3498 size
= ata_format_dsm_trim_descr(scmd
, trmax
, block
, n_block
);
3500 goto invalid_param_len
;
3502 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3503 /* Newer devices support queued TRIM commands */
3504 tf
->protocol
= ATA_PROT_NCQ
;
3505 tf
->command
= ATA_CMD_FPDMA_SEND
;
3506 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3507 tf
->nsect
= qc
->tag
<< 3;
3508 tf
->hob_feature
= (size
/ 512) >> 8;
3509 tf
->feature
= size
/ 512;
3513 tf
->protocol
= ATA_PROT_DMA
;
3514 tf
->hob_feature
= 0;
3515 tf
->feature
= ATA_DSM_TRIM
;
3516 tf
->hob_nsect
= (size
/ 512) >> 8;
3517 tf
->nsect
= size
/ 512;
3518 tf
->command
= ATA_CMD_DSM
;
3521 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3524 ata_qc_set_pc_nbytes(qc
);
3529 ata_scsi_set_invalid_field(dev
, scmd
, fp
, bp
);
3532 /* "Parameter list length error" */
3533 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3536 /* "Invalid command operation code" */
3537 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3542 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3543 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3544 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3546 * Yields a subset to satisfy scsi_report_opcode()
3549 * spin_lock_irqsave(host lock)
3551 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args
*args
, u8
*rbuf
)
3553 struct ata_device
*dev
= args
->dev
;
3554 u8
*cdb
= args
->cmd
->cmnd
;
3556 unsigned int err
= 0;
3559 ata_dev_warn(dev
, "invalid command format %d\n", cdb
[2]);
3568 case SERVICE_ACTION_IN_16
:
3571 case SYNCHRONIZE_CACHE
:
3575 case TEST_UNIT_READY
:
3576 case SEND_DIAGNOSTIC
:
3577 case MAINTENANCE_IN
:
3589 case MODE_SELECT_10
:
3595 if (ata_id_zoned_cap(dev
->id
) ||
3596 dev
->class == ATA_DEV_ZAC
)
3599 case SECURITY_PROTOCOL_IN
:
3600 case SECURITY_PROTOCOL_OUT
:
3601 if (dev
->flags
& ATA_DFLAG_TRUSTED
)
3608 rbuf
[1] = supported
; /* supported */
3613 * ata_scsi_report_zones_complete - convert ATA output
3614 * @qc: command structure returning the data
3616 * Convert T-13 little-endian field representation into
3617 * T-10 big-endian field representation.
3620 static void ata_scsi_report_zones_complete(struct ata_queued_cmd
*qc
)
3622 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3623 struct sg_mapping_iter miter
;
3624 unsigned long flags
;
3625 unsigned int bytes
= 0;
3627 sg_miter_start(&miter
, scsi_sglist(scmd
), scsi_sg_count(scmd
),
3628 SG_MITER_TO_SG
| SG_MITER_ATOMIC
);
3630 local_irq_save(flags
);
3631 while (sg_miter_next(&miter
)) {
3632 unsigned int offset
= 0;
3637 u64 max_lba
, opt_lba
;
3640 /* Swizzle header */
3642 list_length
= get_unaligned_le32(&hdr
[0]);
3643 same
= get_unaligned_le16(&hdr
[4]);
3644 max_lba
= get_unaligned_le64(&hdr
[8]);
3645 opt_lba
= get_unaligned_le64(&hdr
[16]);
3646 put_unaligned_be32(list_length
, &hdr
[0]);
3647 hdr
[4] = same
& 0xf;
3648 put_unaligned_be64(max_lba
, &hdr
[8]);
3649 put_unaligned_be64(opt_lba
, &hdr
[16]);
3653 while (offset
< miter
.length
) {
3655 u8 cond
, type
, non_seq
, reset
;
3656 u64 size
, start
, wp
;
3658 /* Swizzle zone descriptor */
3659 rec
= miter
.addr
+ offset
;
3660 type
= rec
[0] & 0xf;
3661 cond
= (rec
[1] >> 4) & 0xf;
3662 non_seq
= (rec
[1] & 2);
3663 reset
= (rec
[1] & 1);
3664 size
= get_unaligned_le64(&rec
[8]);
3665 start
= get_unaligned_le64(&rec
[16]);
3666 wp
= get_unaligned_le64(&rec
[24]);
3668 rec
[1] = (cond
<< 4) | non_seq
| reset
;
3669 put_unaligned_be64(size
, &rec
[8]);
3670 put_unaligned_be64(start
, &rec
[16]);
3671 put_unaligned_be64(wp
, &rec
[24]);
3672 WARN_ON(offset
+ 64 > miter
.length
);
3677 sg_miter_stop(&miter
);
3678 local_irq_restore(flags
);
3680 ata_scsi_qc_complete(qc
);
3683 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd
*qc
)
3685 struct ata_taskfile
*tf
= &qc
->tf
;
3686 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3687 const u8
*cdb
= scmd
->cmnd
;
3688 u16 sect
, fp
= (u16
)-1;
3689 u8 sa
, options
, bp
= 0xff;
3693 if (unlikely(scmd
->cmd_len
< 16)) {
3694 ata_dev_warn(qc
->dev
, "invalid cdb length %d\n",
3699 scsi_16_lba_len(cdb
, &block
, &n_block
);
3700 if (n_block
!= scsi_bufflen(scmd
)) {
3701 ata_dev_warn(qc
->dev
, "non-matching transfer count (%d/%d)\n",
3702 n_block
, scsi_bufflen(scmd
));
3703 goto invalid_param_len
;
3706 if (sa
!= ZI_REPORT_ZONES
) {
3707 ata_dev_warn(qc
->dev
, "invalid service action %d\n", sa
);
3712 * ZAC allows only for transfers in 512 byte blocks,
3713 * and uses a 16 bit value for the transfer count.
3715 if ((n_block
/ 512) > 0xffff || n_block
< 512 || (n_block
% 512)) {
3716 ata_dev_warn(qc
->dev
, "invalid transfer count %d\n", n_block
);
3717 goto invalid_param_len
;
3719 sect
= n_block
/ 512;
3720 options
= cdb
[14] & 0xbf;
3722 if (ata_ncq_enabled(qc
->dev
) &&
3723 ata_fpdma_zac_mgmt_in_supported(qc
->dev
)) {
3724 tf
->protocol
= ATA_PROT_NCQ
;
3725 tf
->command
= ATA_CMD_FPDMA_RECV
;
3726 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN
& 0x1f;
3727 tf
->nsect
= qc
->tag
<< 3;
3728 tf
->feature
= sect
& 0xff;
3729 tf
->hob_feature
= (sect
>> 8) & 0xff;
3730 tf
->auxiliary
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
| (options
<< 8);
3732 tf
->command
= ATA_CMD_ZAC_MGMT_IN
;
3733 tf
->feature
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
;
3734 tf
->protocol
= ATA_PROT_DMA
;
3735 tf
->hob_feature
= options
;
3736 tf
->hob_nsect
= (sect
>> 8) & 0xff;
3737 tf
->nsect
= sect
& 0xff;
3739 tf
->device
= ATA_LBA
;
3740 tf
->lbah
= (block
>> 16) & 0xff;
3741 tf
->lbam
= (block
>> 8) & 0xff;
3742 tf
->lbal
= block
& 0xff;
3743 tf
->hob_lbah
= (block
>> 40) & 0xff;
3744 tf
->hob_lbam
= (block
>> 32) & 0xff;
3745 tf
->hob_lbal
= (block
>> 24) & 0xff;
3747 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3748 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
3750 ata_qc_set_pc_nbytes(qc
);
3752 qc
->complete_fn
= ata_scsi_report_zones_complete
;
3757 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
3761 /* "Parameter list length error" */
3762 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3766 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd
*qc
)
3768 struct ata_taskfile
*tf
= &qc
->tf
;
3769 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3770 struct ata_device
*dev
= qc
->dev
;
3771 const u8
*cdb
= scmd
->cmnd
;
3777 if (unlikely(scmd
->cmd_len
< 16)) {
3783 if ((sa
!= ZO_CLOSE_ZONE
) && (sa
!= ZO_FINISH_ZONE
) &&
3784 (sa
!= ZO_OPEN_ZONE
) && (sa
!= ZO_RESET_WRITE_POINTER
)) {
3789 scsi_16_lba_len(cdb
, &block
, &n_block
);
3792 * ZAC MANAGEMENT OUT doesn't define any length
3794 goto invalid_param_len
;
3796 if (block
> dev
->n_sectors
)
3799 all
= cdb
[14] & 0x1;
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
->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 /* "Logical Block Address out of range" */
3830 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x00);
3833 /* "Parameter list length error" */
3834 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3839 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3840 * @qc: Storage for translated ATA taskfile
3841 * @buf: input buffer
3842 * @len: number of valid bytes in the input buffer
3843 * @fp: out parameter for the failed field on error
3845 * Prepare a taskfile to modify caching information for the device.
3850 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3851 const u8
*buf
, int len
, u16
*fp
)
3853 struct ata_taskfile
*tf
= &qc
->tf
;
3854 struct ata_device
*dev
= qc
->dev
;
3855 u8 mpage
[CACHE_MPAGE_LEN
];
3860 * The first two bytes of def_cache_mpage are a header, so offsets
3861 * in mpage are off by 2 compared to buf. Same for len.
3864 if (len
!= CACHE_MPAGE_LEN
- 2) {
3865 if (len
< CACHE_MPAGE_LEN
- 2)
3868 *fp
= CACHE_MPAGE_LEN
- 2;
3872 wce
= buf
[0] & (1 << 2);
3875 * Check that read-only bits are not modified.
3877 ata_msense_caching(dev
->id
, mpage
, false);
3878 for (i
= 0; i
< CACHE_MPAGE_LEN
- 2; i
++) {
3881 if (mpage
[i
+ 2] != buf
[i
]) {
3887 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3888 tf
->protocol
= ATA_PROT_NODATA
;
3890 tf
->command
= ATA_CMD_SET_FEATURES
;
3891 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3896 * ata_mselect_control - Simulate MODE SELECT for control page
3897 * @qc: Storage for translated ATA taskfile
3898 * @buf: input buffer
3899 * @len: number of valid bytes in the input buffer
3900 * @fp: out parameter for the failed field on error
3902 * Prepare a taskfile to modify caching information for the device.
3907 static int ata_mselect_control(struct ata_queued_cmd
*qc
,
3908 const u8
*buf
, int len
, u16
*fp
)
3910 struct ata_device
*dev
= qc
->dev
;
3911 u8 mpage
[CONTROL_MPAGE_LEN
];
3916 * The first two bytes of def_control_mpage are a header, so offsets
3917 * in mpage are off by 2 compared to buf. Same for len.
3920 if (len
!= CONTROL_MPAGE_LEN
- 2) {
3921 if (len
< CONTROL_MPAGE_LEN
- 2)
3924 *fp
= CONTROL_MPAGE_LEN
- 2;
3928 d_sense
= buf
[0] & (1 << 2);
3931 * Check that read-only bits are not modified.
3933 ata_msense_control(dev
, mpage
, false);
3934 for (i
= 0; i
< CONTROL_MPAGE_LEN
- 2; i
++) {
3937 if (mpage
[2 + i
] != buf
[i
]) {
3942 if (d_sense
& (1 << 2))
3943 dev
->flags
|= ATA_DFLAG_D_SENSE
;
3945 dev
->flags
&= ~ATA_DFLAG_D_SENSE
;
3950 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3951 * @qc: Storage for translated ATA taskfile
3953 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3954 * Assume this is invoked for direct access devices (e.g. disks) only.
3955 * There should be no block descriptor for other device types.
3958 * spin_lock_irqsave(host lock)
3960 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3962 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3963 const u8
*cdb
= scmd
->cmnd
;
3966 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3973 six_byte
= (cdb
[0] == MODE_SELECT
);
3975 if (scmd
->cmd_len
< 5) {
3983 if (scmd
->cmd_len
< 9) {
3988 len
= (cdb
[7] << 8) + cdb
[8];
3992 /* We only support PF=1, SP=0. */
3993 if ((cdb
[1] & 0x11) != 0x10) {
3995 bp
= (cdb
[1] & 0x01) ? 1 : 5;
3999 /* Test early for possible overrun. */
4000 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
4001 goto invalid_param_len
;
4003 p
= page_address(sg_page(scsi_sglist(scmd
)));
4005 /* Move past header and block descriptors. */
4007 goto invalid_param_len
;
4012 bd_len
= (p
[6] << 8) + p
[7];
4017 goto invalid_param_len
;
4018 if (bd_len
!= 0 && bd_len
!= 8) {
4019 fp
= (six_byte
) ? 3 : 6;
4020 fp
+= bd_len
+ hdr_len
;
4029 /* Parse both possible formats for the mode page headers. */
4033 goto invalid_param_len
;
4036 pg_len
= (p
[2] << 8) | p
[3];
4041 goto invalid_param_len
;
4050 * No mode subpages supported (yet) but asking for _all_
4051 * subpages may be valid
4053 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
4054 fp
= (p
[0] & 0x40) ? 1 : 0;
4055 fp
+= hdr_len
+ bd_len
;
4059 goto invalid_param_len
;
4063 if (ata_mselect_caching(qc
, p
, pg_len
, &fp
) < 0) {
4064 fp
+= hdr_len
+ bd_len
;
4069 if (ata_mselect_control(qc
, p
, pg_len
, &fp
) < 0) {
4070 fp
+= hdr_len
+ bd_len
;
4073 goto skip
; /* No ATA command to send */
4076 default: /* invalid page code */
4077 fp
= bd_len
+ hdr_len
;
4082 * Only one page has changeable data, so we only support setting one
4091 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
4095 ata_scsi_set_invalid_parameter(qc
->dev
, scmd
, fp
);
4099 /* "Parameter list length error" */
4100 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
4104 scmd
->result
= SAM_STAT_GOOD
;
4108 static u8
ata_scsi_trusted_op(u32 len
, bool send
, bool dma
)
4111 return ATA_CMD_TRUSTED_NONDATA
;
4113 return dma
? ATA_CMD_TRUSTED_SND_DMA
: ATA_CMD_TRUSTED_SND
;
4115 return dma
? ATA_CMD_TRUSTED_RCV_DMA
: ATA_CMD_TRUSTED_RCV
;
4118 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd
*qc
)
4120 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4121 const u8
*cdb
= scmd
->cmnd
;
4122 struct ata_taskfile
*tf
= &qc
->tf
;
4124 bool send
= (cdb
[0] == SECURITY_PROTOCOL_OUT
);
4125 u16 spsp
= get_unaligned_be16(&cdb
[2]);
4126 u32 len
= get_unaligned_be32(&cdb
[6]);
4127 bool dma
= !(qc
->dev
->flags
& ATA_DFLAG_PIO
);
4130 * We don't support the ATA "security" protocol.
4133 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 1, 0);
4137 if (cdb
[4] & 7) { /* INC_512 */
4139 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4143 if (len
> 0x01fffe00) {
4144 ata_scsi_set_invalid_field(qc
->dev
, scmd
, 6, 0);
4148 /* convert to the sector-based ATA addressing */
4149 len
= (len
+ 511) / 512;
4152 tf
->protocol
= dma
? ATA_PROT_DMA
: ATA_PROT_PIO
;
4153 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
| ATA_TFLAG_LBA
;
4155 tf
->flags
|= ATA_TFLAG_WRITE
;
4156 tf
->command
= ata_scsi_trusted_op(len
, send
, dma
);
4158 tf
->lbam
= spsp
& 0xff;
4159 tf
->lbah
= spsp
>> 8;
4162 tf
->nsect
= len
& 0xff;
4163 tf
->lbal
= len
>> 8;
4166 tf
->lbah
= (1 << 7);
4169 ata_qc_set_pc_nbytes(qc
);
4174 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4175 * @qc: Command to be translated
4177 * Translate a SCSI variable length CDB to specified commands.
4178 * It checks a service action value in CDB to call corresponding handler.
4181 * Zero on success, non-zero on failure
4184 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd
*qc
)
4186 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
4187 const u8
*cdb
= scmd
->cmnd
;
4188 const u16 sa
= get_unaligned_be16(&cdb
[8]);
4191 * if service action represents a ata pass-thru(32) command,
4192 * then pass it to ata_scsi_pass_thru handler.
4195 return ata_scsi_pass_thru(qc
);
4197 /* unsupported service action */
4202 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4204 * @cmd: SCSI command opcode to consider
4206 * Look up the SCSI command given, and determine whether the
4207 * SCSI command is to be translated or simulated.
4210 * Pointer to translation function if possible, %NULL if not.
4213 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
4223 return ata_scsi_rw_xlat
;
4226 return ata_scsi_write_same_xlat
;
4228 case SYNCHRONIZE_CACHE
:
4229 if (ata_try_flush_cache(dev
))
4230 return ata_scsi_flush_xlat
;
4235 return ata_scsi_verify_xlat
;
4239 return ata_scsi_pass_thru
;
4241 case VARIABLE_LENGTH_CMD
:
4242 return ata_scsi_var_len_cdb_xlat
;
4245 case MODE_SELECT_10
:
4246 return ata_scsi_mode_select_xlat
;
4250 return ata_scsi_zbc_in_xlat
;
4253 return ata_scsi_zbc_out_xlat
;
4255 case SECURITY_PROTOCOL_IN
:
4256 case SECURITY_PROTOCOL_OUT
:
4257 if (!(dev
->flags
& ATA_DFLAG_TRUSTED
))
4259 return ata_scsi_security_inout_xlat
;
4262 return ata_scsi_start_stop_xlat
;
4269 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4270 * @ap: ATA port to which the command was being sent
4271 * @cmd: SCSI command to dump
4273 * Prints the contents of a SCSI command via printk().
4276 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
4277 struct scsi_cmnd
*cmd
)
4280 struct scsi_device
*scsidev
= cmd
->device
;
4282 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
4284 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
4289 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
4290 struct ata_device
*dev
)
4292 u8 scsi_op
= scmd
->cmnd
[0];
4293 ata_xlat_func_t xlat_func
;
4296 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
4297 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
4300 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4302 if (unlikely(!scmd
->cmd_len
))
4306 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
4307 /* relay SCSI command to ATAPI device */
4308 int len
= COMMAND_SIZE(scsi_op
);
4309 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
4312 xlat_func
= atapi_xlat
;
4314 /* ATA_16 passthru, treat as an ATA command */
4315 if (unlikely(scmd
->cmd_len
> 16))
4318 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4323 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
4325 ata_scsi_simulate(dev
, scmd
);
4330 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4331 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
4332 scmd
->result
= DID_ERROR
<< 16;
4333 scmd
->scsi_done(scmd
);
4338 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4339 * @shost: SCSI host of command to be sent
4340 * @cmd: SCSI command to be sent
4342 * In some cases, this function translates SCSI commands into
4343 * ATA taskfiles, and queues the taskfiles to be sent to
4344 * hardware. In other cases, this function simulates a
4345 * SCSI device by evaluating and responding to certain
4346 * SCSI commands. This creates the overall effect of
4347 * ATA and ATAPI devices appearing as SCSI devices.
4353 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4356 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
4358 struct ata_port
*ap
;
4359 struct ata_device
*dev
;
4360 struct scsi_device
*scsidev
= cmd
->device
;
4362 unsigned long irq_flags
;
4364 ap
= ata_shost_to_port(shost
);
4366 spin_lock_irqsave(ap
->lock
, irq_flags
);
4368 ata_scsi_dump_cdb(ap
, cmd
);
4370 dev
= ata_scsi_find_dev(ap
, scsidev
);
4372 rc
= __ata_scsi_queuecmd(cmd
, dev
);
4374 cmd
->result
= (DID_BAD_TARGET
<< 16);
4375 cmd
->scsi_done(cmd
);
4378 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
4384 * ata_scsi_simulate - simulate SCSI command on ATA device
4385 * @dev: the target device
4386 * @cmd: SCSI command being sent to device.
4388 * Interprets and directly executes a select list of SCSI commands
4389 * that can be handled internally.
4392 * spin_lock_irqsave(host lock)
4395 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
4397 struct ata_scsi_args args
;
4398 const u8
*scsicmd
= cmd
->cmnd
;
4405 switch(scsicmd
[0]) {
4407 if (scsicmd
[1] & 2) /* is CmdDt set? */
4408 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4409 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
4410 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
4411 else switch (scsicmd
[2]) {
4413 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
4416 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
4419 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
4422 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
4425 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
4428 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
4431 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
4434 if (dev
->flags
& ATA_DFLAG_ZAC
) {
4435 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b6
);
4440 ata_scsi_set_invalid_field(dev
, cmd
, 2, 0xff);
4447 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
4451 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4454 case SERVICE_ACTION_IN_16
:
4455 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
4456 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4458 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4462 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
4466 ata_scsi_set_sense(dev
, cmd
, 0, 0, 0);
4467 cmd
->result
= (DRIVER_SENSE
<< 24);
4470 /* if we reach this, then writeback caching is disabled,
4471 * turning this into a no-op.
4473 case SYNCHRONIZE_CACHE
:
4476 /* no-op's, complete with success */
4480 case TEST_UNIT_READY
:
4483 case SEND_DIAGNOSTIC
:
4484 tmp8
= scsicmd
[1] & ~(1 << 3);
4485 if (tmp8
!= 0x4 || scsicmd
[3] || scsicmd
[4])
4486 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4489 case MAINTENANCE_IN
:
4490 if (scsicmd
[1] == MI_REPORT_SUPPORTED_OPERATION_CODES
)
4491 ata_scsi_rbuf_fill(&args
, ata_scsiop_maint_in
);
4493 ata_scsi_set_invalid_field(dev
, cmd
, 1, 0xff);
4496 /* all other commands */
4498 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
4499 /* "Invalid command operation code" */
4503 cmd
->scsi_done(cmd
);
4506 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
4510 for (i
= 0; i
< host
->n_ports
; i
++) {
4511 struct ata_port
*ap
= host
->ports
[i
];
4512 struct Scsi_Host
*shost
;
4515 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
4519 shost
->eh_noresume
= 1;
4520 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
4521 ap
->scsi_host
= shost
;
4523 shost
->transportt
= ata_scsi_transport_template
;
4524 shost
->unique_id
= ap
->print_id
;
4527 shost
->max_channel
= 1;
4528 shost
->max_cmd_len
= 32;
4530 /* Schedule policy is determined by ->qc_defer()
4531 * callback and it needs to see every deferred qc.
4532 * Set host_blocked to 1 to prevent SCSI midlayer from
4533 * automatically deferring requests.
4535 shost
->max_host_blocked
= 1;
4537 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
4538 &ap
->tdev
, ap
->host
->dev
);
4546 scsi_host_put(host
->ports
[i
]->scsi_host
);
4549 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
4551 scsi_remove_host(shost
);
4552 scsi_host_put(shost
);
4557 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
4560 struct ata_device
*last_failed_dev
= NULL
;
4561 struct ata_link
*link
;
4562 struct ata_device
*dev
;
4565 ata_for_each_link(link
, ap
, EDGE
) {
4566 ata_for_each_dev(dev
, link
, ENABLED
) {
4567 struct scsi_device
*sdev
;
4568 int channel
= 0, id
= 0;
4573 if (ata_is_host_link(link
))
4576 channel
= link
->pmp
;
4578 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
4580 if (!IS_ERR(sdev
)) {
4582 scsi_device_put(sdev
);
4589 /* If we scanned while EH was in progress or allocation
4590 * failure occurred, scan would have failed silently. Check
4591 * whether all devices are attached.
4593 ata_for_each_link(link
, ap
, EDGE
) {
4594 ata_for_each_dev(dev
, link
, ENABLED
) {
4603 /* we're missing some SCSI devices */
4605 /* If caller requested synchrnous scan && we've made
4606 * any progress, sleep briefly and repeat.
4608 if (dev
!= last_failed_dev
) {
4610 last_failed_dev
= dev
;
4614 /* We might be failing to detect boot device, give it
4615 * a few more chances.
4623 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4626 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
4627 round_jiffies_relative(HZ
));
4631 * ata_scsi_offline_dev - offline attached SCSI device
4632 * @dev: ATA device to offline attached SCSI device for
4634 * This function is called from ata_eh_hotplug() and responsible
4635 * for taking the SCSI device attached to @dev offline. This
4636 * function is called with host lock which protects dev->sdev
4640 * spin_lock_irqsave(host lock)
4643 * 1 if attached SCSI device exists, 0 otherwise.
4645 int ata_scsi_offline_dev(struct ata_device
*dev
)
4648 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
4655 * ata_scsi_remove_dev - remove attached SCSI device
4656 * @dev: ATA device to remove attached SCSI device for
4658 * This function is called from ata_eh_scsi_hotplug() and
4659 * responsible for removing the SCSI device attached to @dev.
4662 * Kernel thread context (may sleep).
4664 static void ata_scsi_remove_dev(struct ata_device
*dev
)
4666 struct ata_port
*ap
= dev
->link
->ap
;
4667 struct scsi_device
*sdev
;
4668 unsigned long flags
;
4670 /* Alas, we need to grab scan_mutex to ensure SCSI device
4671 * state doesn't change underneath us and thus
4672 * scsi_device_get() always succeeds. The mutex locking can
4673 * be removed if there is __scsi_device_get() interface which
4674 * increments reference counts regardless of device state.
4676 mutex_lock(&ap
->scsi_host
->scan_mutex
);
4677 spin_lock_irqsave(ap
->lock
, flags
);
4679 /* clearing dev->sdev is protected by host lock */
4684 /* If user initiated unplug races with us, sdev can go
4685 * away underneath us after the host lock and
4686 * scan_mutex are released. Hold onto it.
4688 if (scsi_device_get(sdev
) == 0) {
4689 /* The following ensures the attached sdev is
4690 * offline on return from ata_scsi_offline_dev()
4691 * regardless it wins or loses the race
4692 * against this function.
4694 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
4701 spin_unlock_irqrestore(ap
->lock
, flags
);
4702 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
4705 ata_dev_info(dev
, "detaching (SCSI %s)\n",
4706 dev_name(&sdev
->sdev_gendev
));
4708 scsi_remove_device(sdev
);
4709 scsi_device_put(sdev
);
4713 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
4715 struct ata_port
*ap
= link
->ap
;
4716 struct ata_device
*dev
;
4718 ata_for_each_dev(dev
, link
, ALL
) {
4719 unsigned long flags
;
4721 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
4724 spin_lock_irqsave(ap
->lock
, flags
);
4725 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
4726 spin_unlock_irqrestore(ap
->lock
, flags
);
4728 if (zpodd_dev_enabled(dev
))
4731 ata_scsi_remove_dev(dev
);
4736 * ata_scsi_media_change_notify - send media change event
4737 * @dev: Pointer to the disk device with media change event
4739 * Tell the block layer to send a media change notification
4743 * spin_lock_irqsave(host lock)
4745 void ata_scsi_media_change_notify(struct ata_device
*dev
)
4748 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
4753 * ata_scsi_hotplug - SCSI part of hotplug
4754 * @work: Pointer to ATA port to perform SCSI hotplug on
4756 * Perform SCSI part of hotplug. It's executed from a separate
4757 * workqueue after EH completes. This is necessary because SCSI
4758 * hot plugging requires working EH and hot unplugging is
4759 * synchronized with hot plugging with a mutex.
4762 * Kernel thread context (may sleep).
4764 void ata_scsi_hotplug(struct work_struct
*work
)
4766 struct ata_port
*ap
=
4767 container_of(work
, struct ata_port
, hotplug_task
.work
);
4770 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
4771 DPRINTK("ENTER/EXIT - unloading\n");
4778 * The block layer suspend/resume path is fundamentally broken due
4779 * to freezable kthreads and workqueue and may deadlock if a block
4780 * device gets removed while resume is in progress. I don't know
4781 * what the solution is short of removing freezable kthreads and
4782 * workqueues altogether.
4784 * The following is an ugly hack to avoid kicking off device
4785 * removal while freezer is active. This is a joke but does avoid
4786 * this particular deadlock scenario.
4788 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4789 * http://marc.info/?l=linux-kernel&m=138695698516487
4791 #ifdef CONFIG_FREEZER
4797 mutex_lock(&ap
->scsi_scan_mutex
);
4799 /* Unplug detached devices. We cannot use link iterator here
4800 * because PMP links have to be scanned even if PMP is
4801 * currently not attached. Iterate manually.
4803 ata_scsi_handle_link_detach(&ap
->link
);
4805 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
4806 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
4808 /* scan for new ones */
4809 ata_scsi_scan_host(ap
, 0);
4811 mutex_unlock(&ap
->scsi_scan_mutex
);
4816 * ata_scsi_user_scan - indication for user-initiated bus scan
4817 * @shost: SCSI host to scan
4818 * @channel: Channel to scan
4822 * This function is called when user explicitly requests bus
4823 * scan. Set probe pending flag and invoke EH.
4826 * SCSI layer (we don't care)
4831 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
4832 unsigned int id
, u64 lun
)
4834 struct ata_port
*ap
= ata_shost_to_port(shost
);
4835 unsigned long flags
;
4838 if (!ap
->ops
->error_handler
)
4841 if (lun
!= SCAN_WILD_CARD
&& lun
)
4844 if (!sata_pmp_attached(ap
)) {
4845 if (channel
!= SCAN_WILD_CARD
&& channel
)
4849 if (id
!= SCAN_WILD_CARD
&& id
)
4854 spin_lock_irqsave(ap
->lock
, flags
);
4856 if (devno
== SCAN_WILD_CARD
) {
4857 struct ata_link
*link
;
4859 ata_for_each_link(link
, ap
, EDGE
) {
4860 struct ata_eh_info
*ehi
= &link
->eh_info
;
4861 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4862 ehi
->action
|= ATA_EH_RESET
;
4865 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4868 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4869 ehi
->probe_mask
|= 1 << dev
->devno
;
4870 ehi
->action
|= ATA_EH_RESET
;
4876 ata_port_schedule_eh(ap
);
4877 spin_unlock_irqrestore(ap
->lock
, flags
);
4878 ata_port_wait_eh(ap
);
4880 spin_unlock_irqrestore(ap
->lock
, flags
);
4886 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4887 * @work: Pointer to ATA port to perform scsi_rescan_device()
4889 * After ATA pass thru (SAT) commands are executed successfully,
4890 * libata need to propagate the changes to SCSI layer.
4893 * Kernel thread context (may sleep).
4895 void ata_scsi_dev_rescan(struct work_struct
*work
)
4897 struct ata_port
*ap
=
4898 container_of(work
, struct ata_port
, scsi_rescan_task
);
4899 struct ata_link
*link
;
4900 struct ata_device
*dev
;
4901 unsigned long flags
;
4903 mutex_lock(&ap
->scsi_scan_mutex
);
4904 spin_lock_irqsave(ap
->lock
, flags
);
4906 ata_for_each_link(link
, ap
, EDGE
) {
4907 ata_for_each_dev(dev
, link
, ENABLED
) {
4908 struct scsi_device
*sdev
= dev
->sdev
;
4912 if (scsi_device_get(sdev
))
4915 spin_unlock_irqrestore(ap
->lock
, flags
);
4916 scsi_rescan_device(&(sdev
->sdev_gendev
));
4917 scsi_device_put(sdev
);
4918 spin_lock_irqsave(ap
->lock
, flags
);
4922 spin_unlock_irqrestore(ap
->lock
, flags
);
4923 mutex_unlock(&ap
->scsi_scan_mutex
);
4927 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4928 * @host: ATA host container for all SAS ports
4929 * @port_info: Information from low-level host driver
4930 * @shost: SCSI host that the scsi device is attached to
4933 * PCI/etc. bus probe sem.
4936 * ata_port pointer on success / NULL on failure.
4939 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4940 struct ata_port_info
*port_info
,
4941 struct Scsi_Host
*shost
)
4943 struct ata_port
*ap
;
4945 ap
= ata_port_alloc(host
);
4950 ap
->lock
= &host
->lock
;
4951 ap
->pio_mask
= port_info
->pio_mask
;
4952 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4953 ap
->udma_mask
= port_info
->udma_mask
;
4954 ap
->flags
|= port_info
->flags
;
4955 ap
->ops
= port_info
->port_ops
;
4956 ap
->cbl
= ATA_CBL_SATA
;
4960 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4963 * ata_sas_port_start - Set port up for dma.
4964 * @ap: Port to initialize
4966 * Called just after data structures for each port are
4969 * May be used as the port_start() entry in ata_port_operations.
4972 * Inherited from caller.
4974 int ata_sas_port_start(struct ata_port
*ap
)
4977 * the port is marked as frozen at allocation time, but if we don't
4978 * have new eh, we won't thaw it
4980 if (!ap
->ops
->error_handler
)
4981 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4984 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4987 * ata_port_stop - Undo ata_sas_port_start()
4988 * @ap: Port to shut down
4990 * May be used as the port_stop() entry in ata_port_operations.
4993 * Inherited from caller.
4996 void ata_sas_port_stop(struct ata_port
*ap
)
4999 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
5002 * ata_sas_async_probe - simply schedule probing and return
5003 * @ap: Port to probe
5005 * For batch scheduling of probe for sas attached ata devices, assumes
5006 * the port has already been through ata_sas_port_init()
5008 void ata_sas_async_probe(struct ata_port
*ap
)
5010 __ata_port_probe(ap
);
5012 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
5014 int ata_sas_sync_probe(struct ata_port
*ap
)
5016 return ata_port_probe(ap
);
5018 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
5022 * ata_sas_port_init - Initialize a SATA device
5023 * @ap: SATA port to initialize
5026 * PCI/etc. bus probe sem.
5029 * Zero on success, non-zero on error.
5032 int ata_sas_port_init(struct ata_port
*ap
)
5034 int rc
= ap
->ops
->port_start(ap
);
5038 ap
->print_id
= atomic_inc_return(&ata_print_id
);
5041 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
5044 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5045 * @ap: SATA port to destroy
5049 void ata_sas_port_destroy(struct ata_port
*ap
)
5051 if (ap
->ops
->port_stop
)
5052 ap
->ops
->port_stop(ap
);
5055 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
5058 * ata_sas_slave_configure - Default slave_config routine for libata devices
5059 * @sdev: SCSI device to configure
5060 * @ap: ATA port to which SCSI device is attached
5066 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
5068 ata_scsi_sdev_config(sdev
);
5069 ata_scsi_dev_config(sdev
, ap
->link
.device
);
5072 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
5075 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5076 * @cmd: SCSI command to be sent
5077 * @ap: ATA port to which the command is being sent
5080 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5084 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
5088 ata_scsi_dump_cdb(ap
, cmd
);
5090 if (likely(ata_dev_enabled(ap
->link
.device
)))
5091 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
5093 cmd
->result
= (DID_BAD_TARGET
<< 16);
5094 cmd
->scsi_done(cmd
);
5098 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
5100 int ata_sas_allocate_tag(struct ata_port
*ap
)
5102 unsigned int max_queue
= ap
->host
->n_tags
;
5103 unsigned int i
, tag
;
5105 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
5106 tag
= tag
< max_queue
? tag
: 0;
5108 /* the last tag is reserved for internal command. */
5109 if (tag
== ATA_TAG_INTERNAL
)
5112 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
5113 ap
->sas_last_tag
= tag
;
5120 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
5122 clear_bit(tag
, &ap
->sas_tag_allocated
);