2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
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 void ata_scsi_set_sense(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
275 u8 sk
, u8 asc
, u8 ascq
)
277 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
282 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
284 scsi_build_sense_buffer(d_sense
, cmd
->sense_buffer
, sk
, asc
, ascq
);
287 void ata_scsi_set_sense_information(struct ata_device
*dev
,
288 struct scsi_cmnd
*cmd
,
289 const struct ata_taskfile
*tf
)
296 information
= ata_tf_read_block(tf
, dev
);
297 if (information
== U64_MAX
)
300 scsi_set_sense_information(cmd
->sense_buffer
,
301 SCSI_SENSE_BUFFERSIZE
, information
);
304 static void ata_scsi_set_invalid_field(struct ata_device
*dev
,
305 struct scsi_cmnd
*cmd
, u16 field
, u8 bit
)
307 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
308 /* "Invalid field in CDB" */
309 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
313 static void ata_scsi_set_invalid_parameter(struct ata_device
*dev
,
314 struct scsi_cmnd
*cmd
, u16 field
)
316 /* "Invalid field in parameter list" */
317 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
318 scsi_set_sense_field_pointer(cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
,
323 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
324 const char *buf
, size_t count
)
326 struct Scsi_Host
*shost
= class_to_shost(dev
);
327 struct ata_port
*ap
= ata_shost_to_port(shost
);
328 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
329 return ap
->ops
->em_store(ap
, buf
, count
);
334 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
337 struct Scsi_Host
*shost
= class_to_shost(dev
);
338 struct ata_port
*ap
= ata_shost_to_port(shost
);
340 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
341 return ap
->ops
->em_show(ap
, buf
);
344 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
345 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
346 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
349 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
352 struct Scsi_Host
*shost
= class_to_shost(dev
);
353 struct ata_port
*ap
= ata_shost_to_port(shost
);
355 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
357 DEVICE_ATTR(em_message_type
, S_IRUGO
,
358 ata_scsi_em_message_type_show
, NULL
);
359 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
362 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
365 struct scsi_device
*sdev
= to_scsi_device(dev
);
366 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
367 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
369 if (atadev
&& ap
->ops
->sw_activity_show
&&
370 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
371 return ap
->ops
->sw_activity_show(atadev
, buf
);
376 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
377 const char *buf
, size_t count
)
379 struct scsi_device
*sdev
= to_scsi_device(dev
);
380 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
381 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
382 enum sw_activity val
;
385 if (atadev
&& ap
->ops
->sw_activity_store
&&
386 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
387 val
= simple_strtoul(buf
, NULL
, 0);
389 case OFF
: case BLINK_ON
: case BLINK_OFF
:
390 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
399 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
400 ata_scsi_activity_store
);
401 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
403 struct device_attribute
*ata_common_sdev_attrs
[] = {
404 &dev_attr_unload_heads
,
407 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
409 static void ata_scsi_invalid_field(struct ata_device
*dev
,
410 struct scsi_cmnd
*cmd
, u16 field
)
412 ata_scsi_set_invalid_field(dev
, cmd
, field
, 0xff);
417 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
418 * @sdev: SCSI device for which BIOS geometry is to be determined
419 * @bdev: block device associated with @sdev
420 * @capacity: capacity of SCSI device
421 * @geom: location to which geometry will be output
423 * Generic bios head/sector/cylinder calculator
424 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
425 * mapping. Some situations may arise where the disk is not
426 * bootable if this is not used.
429 * Defined by the SCSI layer. We don't really care.
434 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
435 sector_t capacity
, int geom
[])
439 sector_div(capacity
, 255*63);
446 * ata_scsi_unlock_native_capacity - unlock native capacity
447 * @sdev: SCSI device to adjust device capacity for
449 * This function is called if a partition on @sdev extends beyond
450 * the end of the device. It requests EH to unlock HPA.
453 * Defined by the SCSI layer. Might sleep.
455 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
457 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
458 struct ata_device
*dev
;
461 spin_lock_irqsave(ap
->lock
, flags
);
463 dev
= ata_scsi_find_dev(ap
, sdev
);
464 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
465 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
466 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
467 ata_port_schedule_eh(ap
);
470 spin_unlock_irqrestore(ap
->lock
, flags
);
471 ata_port_wait_eh(ap
);
475 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
477 * @sdev: SCSI device to get identify data for
478 * @arg: User buffer area for identify data
481 * Defined by the SCSI layer. We don't really care.
484 * Zero on success, negative errno on error.
486 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
489 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
490 u16 __user
*dst
= arg
;
496 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
499 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
500 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
503 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
504 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
507 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
508 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
515 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
516 * @scsidev: Device to which we are issuing command
517 * @arg: User provided data for issuing command
520 * Defined by the SCSI layer. We don't really care.
523 * Zero on success, negative errno on error.
525 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
528 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
529 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
531 enum dma_data_direction data_dir
;
537 if (copy_from_user(args
, arg
, sizeof(args
)))
540 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
544 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
547 argsize
= ATA_SECT_SIZE
* args
[3];
548 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
549 if (argbuf
== NULL
) {
554 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
555 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
556 block count in sector count field */
557 data_dir
= DMA_FROM_DEVICE
;
559 scsi_cmd
[1] = (3 << 1); /* Non-data */
560 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
564 scsi_cmd
[0] = ATA_16
;
566 scsi_cmd
[4] = args
[2];
567 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
568 scsi_cmd
[6] = args
[3];
569 scsi_cmd
[8] = args
[1];
573 scsi_cmd
[6] = args
[1];
575 scsi_cmd
[14] = args
[0];
577 /* Good values for timeout and retries? Values below
578 from scsi_ioctl_send_command() for default case... */
579 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
580 sensebuf
, (10*HZ
), 5, 0, NULL
);
582 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
583 u8
*desc
= sensebuf
+ 8;
584 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
586 /* If we set cc then ATA pass-through will cause a
587 * check condition even if no error. Filter that. */
588 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
589 struct scsi_sense_hdr sshdr
;
590 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
592 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
593 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
594 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
597 /* Send userspace a few ATA registers (same as drivers/ide) */
598 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
599 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
600 args
[0] = desc
[13]; /* status */
601 args
[1] = desc
[3]; /* error */
602 args
[2] = desc
[5]; /* sector count (0:7) */
603 if (copy_to_user(arg
, args
, sizeof(args
)))
615 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
624 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
625 * @scsidev: Device to which we are issuing command
626 * @arg: User provided data for issuing command
629 * Defined by the SCSI layer. We don't really care.
632 * Zero on success, negative errno on error.
634 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
637 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
638 u8 args
[7], *sensebuf
= NULL
;
644 if (copy_from_user(args
, arg
, sizeof(args
)))
647 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
651 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
652 scsi_cmd
[0] = ATA_16
;
653 scsi_cmd
[1] = (3 << 1); /* Non-data */
654 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
655 scsi_cmd
[4] = args
[1];
656 scsi_cmd
[6] = args
[2];
657 scsi_cmd
[8] = args
[3];
658 scsi_cmd
[10] = args
[4];
659 scsi_cmd
[12] = args
[5];
660 scsi_cmd
[13] = args
[6] & 0x4f;
661 scsi_cmd
[14] = args
[0];
663 /* Good values for timeout and retries? Values below
664 from scsi_ioctl_send_command() for default case... */
665 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
666 sensebuf
, (10*HZ
), 5, 0, NULL
);
668 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
669 u8
*desc
= sensebuf
+ 8;
670 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
672 /* If we set cc then ATA pass-through will cause a
673 * check condition even if no error. Filter that. */
674 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
675 struct scsi_sense_hdr sshdr
;
676 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
678 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
679 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
680 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
683 /* Send userspace ATA registers */
684 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
685 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
686 args
[0] = desc
[13]; /* status */
687 args
[1] = desc
[3]; /* error */
688 args
[2] = desc
[5]; /* sector count (0:7) */
689 args
[3] = desc
[7]; /* lbal */
690 args
[4] = desc
[9]; /* lbam */
691 args
[5] = desc
[11]; /* lbah */
692 args
[6] = desc
[12]; /* select */
693 if (copy_to_user(arg
, args
, sizeof(args
)))
708 static int ata_ioc32(struct ata_port
*ap
)
710 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
712 if (ap
->pflags
& ATA_PFLAG_PIO32
)
717 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
718 int cmd
, void __user
*arg
)
726 spin_lock_irqsave(ap
->lock
, flags
);
728 spin_unlock_irqrestore(ap
->lock
, flags
);
729 return put_user(val
, (unsigned long __user
*)arg
);
732 val
= (unsigned long) arg
;
734 spin_lock_irqsave(ap
->lock
, flags
);
735 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
737 ap
->pflags
|= ATA_PFLAG_PIO32
;
739 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
741 if (val
!= ata_ioc32(ap
))
744 spin_unlock_irqrestore(ap
->lock
, flags
);
747 case HDIO_GET_IDENTITY
:
748 return ata_get_identity(ap
, scsidev
, arg
);
751 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
753 return ata_cmd_ioctl(scsidev
, arg
);
755 case HDIO_DRIVE_TASK
:
756 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
758 return ata_task_ioctl(scsidev
, arg
);
767 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
769 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
771 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
774 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
777 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
778 * @dev: ATA device to which the new command is attached
779 * @cmd: SCSI command that originated this ATA command
781 * Obtain a reference to an unused ata_queued_cmd structure,
782 * which is the basic libata structure representing a single
783 * ATA command sent to the hardware.
785 * If a command was available, fill in the SCSI-specific
786 * portions of the structure with information on the
790 * spin_lock_irqsave(host lock)
793 * Command allocated, or %NULL if none available.
795 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
796 struct scsi_cmnd
*cmd
)
798 struct ata_queued_cmd
*qc
;
800 qc
= ata_qc_new_init(dev
, cmd
->request
->tag
);
803 qc
->scsidone
= cmd
->scsi_done
;
805 qc
->sg
= scsi_sglist(cmd
);
806 qc
->n_elem
= scsi_sg_count(cmd
);
808 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
815 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
817 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
819 qc
->extrabytes
= scmd
->request
->extra_len
;
820 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
824 * ata_dump_status - user friendly display of error info
825 * @id: id of the port in question
826 * @tf: ptr to filled out taskfile
828 * Decode and dump the ATA error/status registers for the user so
829 * that they have some idea what really happened at the non
830 * make-believe layer.
833 * inherited from caller
835 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
837 u8 stat
= tf
->command
, err
= tf
->feature
;
839 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
840 if (stat
& ATA_BUSY
) {
841 printk("Busy }\n"); /* Data is not valid in this case */
843 if (stat
& ATA_DRDY
) printk("DriveReady ");
844 if (stat
& ATA_DF
) printk("DeviceFault ");
845 if (stat
& ATA_DSC
) printk("SeekComplete ");
846 if (stat
& ATA_DRQ
) printk("DataRequest ");
847 if (stat
& ATA_CORR
) printk("CorrectedError ");
848 if (stat
& ATA_SENSE
) printk("Sense ");
849 if (stat
& ATA_ERR
) printk("Error ");
853 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
854 if (err
& ATA_ABORTED
) printk("DriveStatusError ");
855 if (err
& ATA_ICRC
) {
856 if (err
& ATA_ABORTED
)
858 else printk("Sector ");
860 if (err
& ATA_UNC
) printk("UncorrectableError ");
861 if (err
& ATA_IDNF
) printk("SectorIdNotFound ");
862 if (err
& ATA_TRK0NF
) printk("TrackZeroNotFound ");
863 if (err
& ATA_AMNF
) printk("AddrMarkNotFound ");
870 * ata_to_sense_error - convert ATA error to SCSI error
871 * @id: ATA device number
872 * @drv_stat: value contained in ATA status register
873 * @drv_err: value contained in ATA error register
874 * @sk: the sense key we'll fill out
875 * @asc: the additional sense code we'll fill out
876 * @ascq: the additional sense code qualifier we'll fill out
877 * @verbose: be verbose
879 * Converts an ATA error into a SCSI error. Fill out pointers to
880 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
881 * format sense blocks.
884 * spin_lock_irqsave(host lock)
886 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
887 u8
*asc
, u8
*ascq
, int verbose
)
891 /* Based on the 3ware driver translation table */
892 static const unsigned char sense_table
[][4] = {
894 {0xd1, ABORTED_COMMAND
, 0x00, 0x00},
895 // Device busy Aborted command
897 {0xd0, ABORTED_COMMAND
, 0x00, 0x00},
898 // Device busy Aborted command
900 {0x61, HARDWARE_ERROR
, 0x00, 0x00},
901 // Device fault Hardware error
902 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
903 {0x84, ABORTED_COMMAND
, 0x47, 0x00},
904 // Data CRC error SCSI parity error
905 /* MC|ID|ABRT|TRK0|MARK */
906 {0x37, NOT_READY
, 0x04, 0x00},
907 // Unit offline Not ready
909 {0x09, NOT_READY
, 0x04, 0x00},
910 // Unrecovered disk error Not ready
911 /* Bad address mark */
912 {0x01, MEDIUM_ERROR
, 0x13, 0x00},
913 // Address mark not found for data field
914 /* TRK0 - Track 0 not found */
915 {0x02, HARDWARE_ERROR
, 0x00, 0x00},
917 /* Abort: 0x04 is not translated here, see below */
918 /* Media change request */
919 {0x08, NOT_READY
, 0x04, 0x00},
920 // FIXME: faking offline
921 /* SRV/IDNF - ID not found */
922 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00},
923 // Logical address out of range
924 /* MC - Media Changed */
925 {0x20, UNIT_ATTENTION
, 0x28, 0x00},
926 // Not ready to ready change, medium may have changed
927 /* ECC - Uncorrectable ECC error */
928 {0x40, MEDIUM_ERROR
, 0x11, 0x04},
929 // Unrecovered read error
930 /* BBD - block marked bad */
931 {0x80, MEDIUM_ERROR
, 0x11, 0x04},
932 // Block marked bad Medium error, unrecovered read error
933 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
935 static const unsigned char stat_table
[][4] = {
936 /* Must be first because BUSY means no other bits valid */
937 {0x80, ABORTED_COMMAND
, 0x47, 0x00},
938 // Busy, fake parity for now
939 {0x40, ILLEGAL_REQUEST
, 0x21, 0x04},
940 // Device ready, unaligned write command
941 {0x20, HARDWARE_ERROR
, 0x44, 0x00},
942 // Device fault, internal target failure
943 {0x08, ABORTED_COMMAND
, 0x47, 0x00},
944 // Timed out in xfer, fake parity for now
945 {0x04, RECOVERED_ERROR
, 0x11, 0x00},
946 // Recovered ECC error Medium error, recovered
947 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
951 * Is this an error we can process/parse
953 if (drv_stat
& ATA_BUSY
) {
954 drv_err
= 0; /* Ignore the err bits, they're invalid */
958 /* Look for drv_err */
959 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
960 /* Look for best matches first */
961 if ((sense_table
[i
][0] & drv_err
) ==
963 *sk
= sense_table
[i
][1];
964 *asc
= sense_table
[i
][2];
965 *ascq
= sense_table
[i
][3];
972 * Fall back to interpreting status bits. Note that if the drv_err
973 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
974 * is not descriptive enough.
976 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
977 if (stat_table
[i
][0] & drv_stat
) {
978 *sk
= stat_table
[i
][1];
979 *asc
= stat_table
[i
][2];
980 *ascq
= stat_table
[i
][3];
986 * We need a sensible error return here, which is tricky, and one
987 * that won't cause people to do things like return a disk wrongly.
989 *sk
= ABORTED_COMMAND
;
995 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
996 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
997 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
1002 * ata_gen_passthru_sense - Generate check condition sense block.
1003 * @qc: Command that completed.
1005 * This function is specific to the ATA descriptor format sense
1006 * block specified for the ATA pass through commands. Regardless
1007 * of whether the command errored or not, return a sense
1008 * block. Copy all controller registers into the sense
1009 * block. If there was no error, we get the request from an ATA
1010 * passthrough command, so we use the following sense data:
1011 * sk = RECOVERED ERROR
1012 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1018 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
1020 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1021 struct ata_taskfile
*tf
= &qc
->result_tf
;
1022 unsigned char *sb
= cmd
->sense_buffer
;
1023 unsigned char *desc
= sb
+ 8;
1024 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1025 u8 sense_key
, asc
, ascq
;
1027 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1029 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1032 * Use ata_to_sense_error() to map status register bits
1033 * onto sense key, asc & ascq.
1036 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1037 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1038 &sense_key
, &asc
, &ascq
, verbose
);
1039 ata_scsi_set_sense(qc
->dev
, cmd
, sense_key
, asc
, ascq
);
1042 * ATA PASS-THROUGH INFORMATION AVAILABLE
1043 * Always in descriptor format sense.
1045 scsi_build_sense_buffer(1, cmd
->sense_buffer
,
1046 RECOVERED_ERROR
, 0, 0x1D);
1049 if ((cmd
->sense_buffer
[0] & 0x7f) >= 0x72) {
1052 /* descriptor format */
1054 desc
= (char *)scsi_sense_desc_find(sb
, len
+ 8, 9);
1056 if (SCSI_SENSE_BUFFERSIZE
< len
+ 14)
1059 desc
= sb
+ 8 + len
;
1064 * Copy registers into sense buffer.
1067 desc
[3] = tf
->feature
; /* == error reg */
1068 desc
[5] = tf
->nsect
;
1071 desc
[11] = tf
->lbah
;
1072 desc
[12] = tf
->device
;
1073 desc
[13] = tf
->command
; /* == status reg */
1076 * Fill in Extend bit, and the high order bytes
1079 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1081 desc
[4] = tf
->hob_nsect
;
1082 desc
[6] = tf
->hob_lbal
;
1083 desc
[8] = tf
->hob_lbam
;
1084 desc
[10] = tf
->hob_lbah
;
1087 /* Fixed sense format */
1088 desc
[0] = tf
->feature
;
1089 desc
[1] = tf
->command
; /* status */
1090 desc
[2] = tf
->device
;
1091 desc
[3] = tf
->nsect
;
1093 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1097 if (tf
->hob_lbal
|| tf
->hob_lbam
|| tf
->hob_lbah
)
1101 desc
[10] = tf
->lbam
;
1102 desc
[11] = tf
->lbah
;
1107 * ata_gen_ata_sense - generate a SCSI fixed sense block
1108 * @qc: Command that we are erroring out
1110 * Generate sense block for a failed ATA command @qc. Descriptor
1111 * format is used to accommodate LBA48 block address.
1116 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1118 struct ata_device
*dev
= qc
->dev
;
1119 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1120 struct ata_taskfile
*tf
= &qc
->result_tf
;
1121 unsigned char *sb
= cmd
->sense_buffer
;
1122 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1124 u8 sense_key
, asc
, ascq
;
1126 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1128 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1130 if (ata_dev_disabled(dev
)) {
1131 /* Device disabled after error recovery */
1132 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1133 ata_scsi_set_sense(dev
, cmd
, NOT_READY
, 0x04, 0x21);
1136 /* Use ata_to_sense_error() to map status register bits
1137 * onto sense key, asc & ascq.
1140 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1141 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1142 &sense_key
, &asc
, &ascq
, verbose
);
1143 ata_scsi_set_sense(dev
, cmd
, sense_key
, asc
, ascq
);
1145 /* Could not decode error */
1146 ata_dev_warn(dev
, "could not decode error status 0x%x err_mask 0x%x\n",
1147 tf
->command
, qc
->err_mask
);
1148 ata_scsi_set_sense(dev
, cmd
, ABORTED_COMMAND
, 0, 0);
1152 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1153 if (block
== U64_MAX
)
1156 scsi_set_sense_information(sb
, SCSI_SENSE_BUFFERSIZE
, block
);
1159 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1161 sdev
->use_10_for_rw
= 1;
1162 sdev
->use_10_for_ms
= 1;
1164 /* Schedule policy is determined by ->qc_defer() callback and
1165 * it needs to see every deferred qc. Set dev_blocked to 1 to
1166 * prevent SCSI midlayer from automatically deferring
1169 sdev
->max_device_blocked
= 1;
1173 * atapi_drain_needed - Check whether data transfer may overflow
1174 * @rq: request to be checked
1176 * ATAPI commands which transfer variable length data to host
1177 * might overflow due to application error or hardware bug. This
1178 * function checks whether overflow should be drained and ignored
1185 * 1 if ; otherwise, 0.
1187 static int atapi_drain_needed(struct request
*rq
)
1189 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1192 if (!blk_rq_bytes(rq
) || op_is_write(req_op(rq
)))
1195 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1198 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1199 struct ata_device
*dev
)
1201 struct request_queue
*q
= sdev
->request_queue
;
1203 if (!ata_id_has_unload(dev
->id
))
1204 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1206 /* configure max sectors */
1207 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1209 if (dev
->class == ATA_DEV_ATAPI
) {
1212 sdev
->sector_size
= ATA_SECT_SIZE
;
1214 /* set DMA padding */
1215 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1217 /* configure draining */
1218 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1220 ata_dev_err(dev
, "drain buffer allocation failed\n");
1224 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1226 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1227 sdev
->manage_start_stop
= 1;
1231 * ata_pio_sectors() expects buffer for each sector to not cross
1232 * page boundary. Enforce it by requiring buffers to be sector
1233 * aligned, which works iff sector_size is not larger than
1234 * PAGE_SIZE. ATAPI devices also need the alignment as
1235 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1237 if (sdev
->sector_size
> PAGE_SIZE
)
1239 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1242 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1244 if (dev
->flags
& ATA_DFLAG_AN
)
1245 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1247 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1250 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1251 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1252 scsi_change_queue_depth(sdev
, depth
);
1255 blk_queue_flush_queueable(q
, false);
1262 * ata_scsi_slave_config - Set SCSI device attributes
1263 * @sdev: SCSI device to examine
1265 * This is called before we actually start reading
1266 * and writing to the device, to configure certain
1267 * SCSI mid-layer behaviors.
1270 * Defined by SCSI layer. We don't really care.
1273 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1275 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1276 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1279 ata_scsi_sdev_config(sdev
);
1282 rc
= ata_scsi_dev_config(sdev
, dev
);
1288 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1289 * @sdev: SCSI device to be destroyed
1291 * @sdev is about to be destroyed for hot/warm unplugging. If
1292 * this unplugging was initiated by libata as indicated by NULL
1293 * dev->sdev, this function doesn't have to do anything.
1294 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1295 * Clear dev->sdev, schedule the device for ATA detach and invoke
1299 * Defined by SCSI layer. We don't really care.
1301 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1303 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1304 struct request_queue
*q
= sdev
->request_queue
;
1305 unsigned long flags
;
1306 struct ata_device
*dev
;
1308 if (!ap
->ops
->error_handler
)
1311 spin_lock_irqsave(ap
->lock
, flags
);
1312 dev
= __ata_scsi_find_dev(ap
, sdev
);
1313 if (dev
&& dev
->sdev
) {
1314 /* SCSI device already in CANCEL state, no need to offline it */
1316 dev
->flags
|= ATA_DFLAG_DETACH
;
1317 ata_port_schedule_eh(ap
);
1319 spin_unlock_irqrestore(ap
->lock
, flags
);
1321 kfree(q
->dma_drain_buffer
);
1322 q
->dma_drain_buffer
= NULL
;
1323 q
->dma_drain_size
= 0;
1327 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1328 * @ap: ATA port to which the device change the queue depth
1329 * @sdev: SCSI device to configure queue depth for
1330 * @queue_depth: new queue depth
1332 * libsas and libata have different approaches for associating a sdev to
1336 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1339 struct ata_device
*dev
;
1340 unsigned long flags
;
1342 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1343 return sdev
->queue_depth
;
1345 dev
= ata_scsi_find_dev(ap
, sdev
);
1346 if (!dev
|| !ata_dev_enabled(dev
))
1347 return sdev
->queue_depth
;
1350 spin_lock_irqsave(ap
->lock
, flags
);
1351 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1352 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1353 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1356 spin_unlock_irqrestore(ap
->lock
, flags
);
1358 /* limit and apply queue depth */
1359 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1360 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1361 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1363 if (sdev
->queue_depth
== queue_depth
)
1366 return scsi_change_queue_depth(sdev
, queue_depth
);
1370 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1371 * @sdev: SCSI device to configure queue depth for
1372 * @queue_depth: new queue depth
1374 * This is libata standard hostt->change_queue_depth callback.
1375 * SCSI will call into this callback when user tries to set queue
1379 * SCSI layer (we don't care)
1382 * Newly configured queue depth.
1384 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1386 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1388 return __ata_change_queue_depth(ap
, sdev
, queue_depth
);
1392 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1393 * @qc: Storage for translated ATA taskfile
1395 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1396 * (to start). Perhaps these commands should be preceded by
1397 * CHECK POWER MODE to see what power mode the device is already in.
1398 * [See SAT revision 5 at www.t10.org]
1401 * spin_lock_irqsave(host lock)
1404 * Zero on success, non-zero on error.
1406 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1408 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1409 struct ata_taskfile
*tf
= &qc
->tf
;
1410 const u8
*cdb
= scmd
->cmnd
;
1414 if (scmd
->cmd_len
< 5) {
1419 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1420 tf
->protocol
= ATA_PROT_NODATA
;
1422 ; /* ignore IMMED bit, violates sat-r05 */
1427 goto invalid_fld
; /* LOEJ bit set not supported */
1429 if (((cdb
[4] >> 4) & 0xf) != 0) {
1432 goto invalid_fld
; /* power conditions not supported */
1436 tf
->nsect
= 1; /* 1 sector, lba=0 */
1438 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1439 tf
->flags
|= ATA_TFLAG_LBA
;
1444 tf
->device
|= ATA_LBA
;
1447 tf
->lbal
= 0x1; /* sect */
1448 tf
->lbam
= 0x0; /* cyl low */
1449 tf
->lbah
= 0x0; /* cyl high */
1452 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1454 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1455 * or S5) causing some drives to spin up and down again.
1457 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1458 system_state
== SYSTEM_POWER_OFF
)
1461 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1462 system_entering_hibernation())
1465 /* Issue ATA STANDBY IMMEDIATE command */
1466 tf
->command
= ATA_CMD_STANDBYNOW1
;
1470 * Standby and Idle condition timers could be implemented but that
1471 * would require libata to implement the Power condition mode page
1472 * and allow the user to change it. Changing mode pages requires
1473 * MODE SELECT to be implemented.
1479 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
1482 scmd
->result
= SAM_STAT_GOOD
;
1488 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1489 * @qc: Storage for translated ATA taskfile
1491 * Sets up an ATA taskfile to issue FLUSH CACHE or
1495 * spin_lock_irqsave(host lock)
1498 * Zero on success, non-zero on error.
1500 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1502 struct ata_taskfile
*tf
= &qc
->tf
;
1504 tf
->flags
|= ATA_TFLAG_DEVICE
;
1505 tf
->protocol
= ATA_PROT_NODATA
;
1507 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1508 tf
->command
= ATA_CMD_FLUSH_EXT
;
1510 tf
->command
= ATA_CMD_FLUSH
;
1512 /* flush is critical for IO integrity, consider it an IO command */
1513 qc
->flags
|= ATA_QCFLAG_IO
;
1519 * scsi_6_lba_len - Get LBA and transfer length
1520 * @cdb: SCSI command to translate
1522 * Calculate LBA and transfer length for 6-byte commands.
1526 * @plen: the transfer length
1528 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1533 VPRINTK("six-byte command\n");
1535 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1536 lba
|= ((u64
)cdb
[2]) << 8;
1537 lba
|= ((u64
)cdb
[3]);
1546 * scsi_10_lba_len - Get LBA and transfer length
1547 * @cdb: SCSI command to translate
1549 * Calculate LBA and transfer length for 10-byte commands.
1553 * @plen: the transfer length
1555 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1560 VPRINTK("ten-byte command\n");
1562 lba
|= ((u64
)cdb
[2]) << 24;
1563 lba
|= ((u64
)cdb
[3]) << 16;
1564 lba
|= ((u64
)cdb
[4]) << 8;
1565 lba
|= ((u64
)cdb
[5]);
1567 len
|= ((u32
)cdb
[7]) << 8;
1568 len
|= ((u32
)cdb
[8]);
1575 * scsi_16_lba_len - Get LBA and transfer length
1576 * @cdb: SCSI command to translate
1578 * Calculate LBA and transfer length for 16-byte commands.
1582 * @plen: the transfer length
1584 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1589 VPRINTK("sixteen-byte command\n");
1591 lba
|= ((u64
)cdb
[2]) << 56;
1592 lba
|= ((u64
)cdb
[3]) << 48;
1593 lba
|= ((u64
)cdb
[4]) << 40;
1594 lba
|= ((u64
)cdb
[5]) << 32;
1595 lba
|= ((u64
)cdb
[6]) << 24;
1596 lba
|= ((u64
)cdb
[7]) << 16;
1597 lba
|= ((u64
)cdb
[8]) << 8;
1598 lba
|= ((u64
)cdb
[9]);
1600 len
|= ((u32
)cdb
[10]) << 24;
1601 len
|= ((u32
)cdb
[11]) << 16;
1602 len
|= ((u32
)cdb
[12]) << 8;
1603 len
|= ((u32
)cdb
[13]);
1610 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1611 * @qc: Storage for translated ATA taskfile
1613 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1616 * spin_lock_irqsave(host lock)
1619 * Zero on success, non-zero on error.
1621 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1623 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1624 struct ata_taskfile
*tf
= &qc
->tf
;
1625 struct ata_device
*dev
= qc
->dev
;
1626 u64 dev_sectors
= qc
->dev
->n_sectors
;
1627 const u8
*cdb
= scmd
->cmnd
;
1632 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1633 tf
->protocol
= ATA_PROT_NODATA
;
1635 if (cdb
[0] == VERIFY
) {
1636 if (scmd
->cmd_len
< 10) {
1640 scsi_10_lba_len(cdb
, &block
, &n_block
);
1641 } else if (cdb
[0] == VERIFY_16
) {
1642 if (scmd
->cmd_len
< 16) {
1646 scsi_16_lba_len(cdb
, &block
, &n_block
);
1654 if (block
>= dev_sectors
)
1656 if ((block
+ n_block
) > dev_sectors
)
1659 if (dev
->flags
& ATA_DFLAG_LBA
) {
1660 tf
->flags
|= ATA_TFLAG_LBA
;
1662 if (lba_28_ok(block
, n_block
)) {
1664 tf
->command
= ATA_CMD_VERIFY
;
1665 tf
->device
|= (block
>> 24) & 0xf;
1666 } else if (lba_48_ok(block
, n_block
)) {
1667 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1671 tf
->flags
|= ATA_TFLAG_LBA48
;
1672 tf
->command
= ATA_CMD_VERIFY_EXT
;
1674 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1676 tf
->hob_lbah
= (block
>> 40) & 0xff;
1677 tf
->hob_lbam
= (block
>> 32) & 0xff;
1678 tf
->hob_lbal
= (block
>> 24) & 0xff;
1680 /* request too large even for LBA48 */
1683 tf
->nsect
= n_block
& 0xff;
1685 tf
->lbah
= (block
>> 16) & 0xff;
1686 tf
->lbam
= (block
>> 8) & 0xff;
1687 tf
->lbal
= block
& 0xff;
1689 tf
->device
|= ATA_LBA
;
1692 u32 sect
, head
, cyl
, track
;
1694 if (!lba_28_ok(block
, n_block
))
1697 /* Convert LBA to CHS */
1698 track
= (u32
)block
/ dev
->sectors
;
1699 cyl
= track
/ dev
->heads
;
1700 head
= track
% dev
->heads
;
1701 sect
= (u32
)block
% dev
->sectors
+ 1;
1703 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1704 (u32
)block
, track
, cyl
, head
, sect
);
1706 /* Check whether the converted CHS can fit.
1710 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1713 tf
->command
= ATA_CMD_VERIFY
;
1714 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1717 tf
->lbah
= cyl
>> 8;
1724 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1728 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1729 /* "Logical Block Address out of range" */
1733 scmd
->result
= SAM_STAT_GOOD
;
1738 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1739 * @qc: Storage for translated ATA taskfile
1741 * Converts any of six SCSI read/write commands into the
1742 * ATA counterpart, including starting sector (LBA),
1743 * sector count, and taking into account the device's LBA48
1746 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1747 * %WRITE_16 are currently supported.
1750 * spin_lock_irqsave(host lock)
1753 * Zero on success, non-zero on error.
1755 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1757 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1758 const u8
*cdb
= scmd
->cmnd
;
1759 struct request
*rq
= scmd
->request
;
1760 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq
));
1761 unsigned int tf_flags
= 0;
1767 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1768 tf_flags
|= ATA_TFLAG_WRITE
;
1770 /* Calculate the SCSI LBA, transfer length and FUA. */
1774 if (unlikely(scmd
->cmd_len
< 10)) {
1778 scsi_10_lba_len(cdb
, &block
, &n_block
);
1779 if (cdb
[1] & (1 << 3))
1780 tf_flags
|= ATA_TFLAG_FUA
;
1784 if (unlikely(scmd
->cmd_len
< 6)) {
1788 scsi_6_lba_len(cdb
, &block
, &n_block
);
1790 /* for 6-byte r/w commands, transfer length 0
1791 * means 256 blocks of data, not 0 block.
1798 if (unlikely(scmd
->cmd_len
< 16)) {
1802 scsi_16_lba_len(cdb
, &block
, &n_block
);
1803 if (cdb
[1] & (1 << 3))
1804 tf_flags
|= ATA_TFLAG_FUA
;
1807 DPRINTK("no-byte command\n");
1812 /* Check and compose ATA command */
1814 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1815 * length 0 means transfer 0 block of data.
1816 * However, for ATA R/W commands, sector count 0 means
1817 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1819 * WARNING: one or two older ATA drives treat 0 as 0...
1823 qc
->flags
|= ATA_QCFLAG_IO
;
1824 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1826 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1829 if (likely(rc
== 0))
1834 /* treat all other errors as -EINVAL, fall through */
1836 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
1840 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1841 /* "Logical Block Address out of range" */
1845 scmd
->result
= SAM_STAT_GOOD
;
1849 static void ata_qc_done(struct ata_queued_cmd
*qc
)
1851 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1852 void (*done
)(struct scsi_cmnd
*) = qc
->scsidone
;
1858 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1860 struct ata_port
*ap
= qc
->ap
;
1861 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1862 u8
*cdb
= cmd
->cmnd
;
1863 int need_sense
= (qc
->err_mask
!= 0);
1865 /* For ATA pass thru (SAT) commands, generate a sense block if
1866 * user mandated it or if there's an error. Note that if we
1867 * generate because the user forced us to [CK_COND =1], a check
1868 * condition is generated and the ATA register values are returned
1869 * whether the command completed successfully or not. If there
1870 * was no error, we use the following sense data:
1871 * sk = RECOVERED ERROR
1872 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1874 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1875 ((cdb
[2] & 0x20) || need_sense
))
1876 ata_gen_passthru_sense(qc
);
1877 else if (qc
->flags
& ATA_QCFLAG_SENSE_VALID
)
1878 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1879 else if (need_sense
)
1880 ata_gen_ata_sense(qc
);
1882 cmd
->result
= SAM_STAT_GOOD
;
1884 if (need_sense
&& !ap
->ops
->error_handler
)
1885 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1891 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1892 * @dev: ATA device to which the command is addressed
1893 * @cmd: SCSI command to execute
1894 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1896 * Our ->queuecommand() function has decided that the SCSI
1897 * command issued can be directly translated into an ATA
1898 * command, rather than handled internally.
1900 * This function sets up an ata_queued_cmd structure for the
1901 * SCSI command, and sends that ata_queued_cmd to the hardware.
1903 * The xlat_func argument (actor) returns 0 if ready to execute
1904 * ATA command, else 1 to finish translation. If 1 is returned
1905 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1906 * to be set reflecting an error condition or clean (early)
1910 * spin_lock_irqsave(host lock)
1913 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1914 * needs to be deferred.
1916 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1917 ata_xlat_func_t xlat_func
)
1919 struct ata_port
*ap
= dev
->link
->ap
;
1920 struct ata_queued_cmd
*qc
;
1925 qc
= ata_scsi_qc_new(dev
, cmd
);
1929 /* data is present; dma-map it */
1930 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1931 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1932 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1933 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1937 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1939 qc
->dma_dir
= cmd
->sc_data_direction
;
1942 qc
->complete_fn
= ata_scsi_qc_complete
;
1947 if (ap
->ops
->qc_defer
) {
1948 if ((rc
= ap
->ops
->qc_defer(qc
)))
1952 /* select device, send command to hardware */
1960 cmd
->scsi_done(cmd
);
1961 DPRINTK("EXIT - early finish (good or error)\n");
1966 cmd
->result
= (DID_ERROR
<< 16);
1967 cmd
->scsi_done(cmd
);
1969 DPRINTK("EXIT - internal\n");
1974 DPRINTK("EXIT - defer\n");
1975 if (rc
== ATA_DEFER_LINK
)
1976 return SCSI_MLQUEUE_DEVICE_BUSY
;
1978 return SCSI_MLQUEUE_HOST_BUSY
;
1982 * ata_scsi_rbuf_get - Map response buffer.
1983 * @cmd: SCSI command containing buffer to be mapped.
1984 * @flags: unsigned long variable to store irq enable status
1985 * @copy_in: copy in from user buffer
1987 * Prepare buffer for simulated SCSI commands.
1990 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1993 * Pointer to response buffer.
1995 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1996 unsigned long *flags
)
1998 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
2000 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
2002 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2003 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2004 return ata_scsi_rbuf
;
2008 * ata_scsi_rbuf_put - Unmap response buffer.
2009 * @cmd: SCSI command containing buffer to be unmapped.
2010 * @copy_out: copy out result
2011 * @flags: @flags passed to ata_scsi_rbuf_get()
2013 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2014 * @copy_back is true.
2017 * Unlocks ata_scsi_rbuf_lock.
2019 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
2020 unsigned long *flags
)
2023 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
2024 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
2025 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
2029 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2030 * @args: device IDENTIFY data / SCSI command of interest.
2031 * @actor: Callback hook for desired SCSI command simulator
2033 * Takes care of the hard work of simulating a SCSI command...
2034 * Mapping the response buffer, calling the command's handler,
2035 * and handling the handler's return value. This return value
2036 * indicates whether the handler wishes the SCSI command to be
2037 * completed successfully (0), or not (in which case cmd->result
2038 * and sense buffer are assumed to be set).
2041 * spin_lock_irqsave(host lock)
2043 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
2044 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
2048 struct scsi_cmnd
*cmd
= args
->cmd
;
2049 unsigned long flags
;
2051 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
2052 rc
= actor(args
, rbuf
);
2053 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
2056 cmd
->result
= SAM_STAT_GOOD
;
2061 * ata_scsiop_inq_std - Simulate INQUIRY command
2062 * @args: device IDENTIFY data / SCSI command of interest.
2063 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2065 * Returns standard device identification data associated
2066 * with non-VPD INQUIRY command output.
2069 * spin_lock_irqsave(host lock)
2071 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
2073 const u8 versions
[] = {
2075 0x60, /* SAM-3 (no version claimed) */
2078 0x20, /* SBC-2 (no version claimed) */
2081 0x00 /* SPC-3 (no version claimed) */
2083 const u8 versions_zbc
[] = {
2085 0xA0, /* SAM-5 (no version claimed) */
2088 0x00, /* SBC-4 (no version claimed) */
2091 0xC0, /* SPC-5 (no version claimed) */
2100 0x5, /* claim SPC-3 version compatibility */
2110 /* set scsi removable (RMB) bit per ata bit, or if the
2111 * AHCI port says it's external (Hotplug-capable, eSATA).
2113 if (ata_id_removable(args
->id
) ||
2114 (args
->dev
->link
->ap
->pflags
& ATA_PFLAG_EXTERNAL
))
2117 if (args
->dev
->class == ATA_DEV_ZAC
) {
2119 hdr
[2] = 0x7; /* claim SPC-5 version compatibility */
2122 memcpy(rbuf
, hdr
, sizeof(hdr
));
2123 memcpy(&rbuf
[8], "ATA ", 8);
2124 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
2126 /* From SAT, use last 2 words from fw rev unless they are spaces */
2127 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
+ 2, 4);
2128 if (strncmp(&rbuf
[32], " ", 4) == 0)
2129 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2131 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
2132 memcpy(&rbuf
[32], "n/a ", 4);
2134 if (ata_id_zoned_cap(args
->id
) || args
->dev
->class == ATA_DEV_ZAC
)
2135 memcpy(rbuf
+ 58, versions_zbc
, sizeof(versions_zbc
));
2137 memcpy(rbuf
+ 58, versions
, sizeof(versions
));
2143 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2144 * @args: device IDENTIFY data / SCSI command of interest.
2145 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2147 * Returns list of inquiry VPD pages available.
2150 * spin_lock_irqsave(host lock)
2152 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2155 const u8 pages
[] = {
2156 0x00, /* page 0x00, this page */
2157 0x80, /* page 0x80, unit serial no page */
2158 0x83, /* page 0x83, device ident page */
2159 0x89, /* page 0x89, ata info page */
2160 0xb0, /* page 0xb0, block limits page */
2161 0xb1, /* page 0xb1, block device characteristics page */
2162 0xb2, /* page 0xb2, thin provisioning page */
2163 0xb6, /* page 0xb6, zoned block device characteristics */
2166 num_pages
= sizeof(pages
);
2167 if (!(args
->dev
->flags
& ATA_DFLAG_ZAC
))
2169 rbuf
[3] = num_pages
; /* number of supported VPD pages */
2170 memcpy(rbuf
+ 4, pages
, num_pages
);
2175 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2176 * @args: device IDENTIFY data / SCSI command of interest.
2177 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2179 * Returns ATA device serial number.
2182 * spin_lock_irqsave(host lock)
2184 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2188 0x80, /* this page code */
2190 ATA_ID_SERNO_LEN
, /* page len */
2193 memcpy(rbuf
, hdr
, sizeof(hdr
));
2194 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2195 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2200 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2201 * @args: device IDENTIFY data / SCSI command of interest.
2202 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2204 * Yields two logical unit device identification designators:
2205 * - vendor specific ASCII containing the ATA serial number
2206 * - SAT defined "t10 vendor id based" containing ASCII vendor
2207 * name ("ATA "), model and serial numbers.
2210 * spin_lock_irqsave(host lock)
2212 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2214 const int sat_model_serial_desc_len
= 68;
2217 rbuf
[1] = 0x83; /* this page code */
2220 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2222 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2224 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2225 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2226 num
+= ATA_ID_SERNO_LEN
;
2228 /* SAT defined lu model and serial numbers descriptor */
2229 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2232 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2234 memcpy(rbuf
+ num
, "ATA ", 8);
2236 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2238 num
+= ATA_ID_PROD_LEN
;
2239 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2241 num
+= ATA_ID_SERNO_LEN
;
2243 if (ata_id_has_wwn(args
->id
)) {
2244 /* SAT defined lu world wide name */
2245 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2248 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2250 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2251 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2252 num
+= ATA_ID_WWN_LEN
;
2254 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2259 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2260 * @args: device IDENTIFY data / SCSI command of interest.
2261 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2263 * Yields SAT-specified ATA VPD page.
2266 * spin_lock_irqsave(host lock)
2268 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2270 struct ata_taskfile tf
;
2272 memset(&tf
, 0, sizeof(tf
));
2274 rbuf
[1] = 0x89; /* our page code */
2275 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2276 rbuf
[3] = (0x238 & 0xff);
2278 memcpy(&rbuf
[8], "linux ", 8);
2279 memcpy(&rbuf
[16], "libata ", 16);
2280 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2282 /* we don't store the ATA device signature, so we fake it */
2284 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2288 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2289 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2291 rbuf
[56] = ATA_CMD_ID_ATA
;
2293 memcpy(&rbuf
[60], &args
->id
[0], 512);
2297 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2302 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2305 * Optimal transfer length granularity.
2307 * This is always one physical block, but for disks with a smaller
2308 * logical than physical sector size we need to figure out what the
2311 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2312 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2315 * Optimal unmap granularity.
2317 * The ATA spec doesn't even know about a granularity or alignment
2318 * for the TRIM command. We can leave away most of the unmap related
2319 * VPD page entries, but we have specifify a granularity to signal
2320 * that we support some form of unmap - in thise case via WRITE SAME
2321 * with the unmap bit set.
2323 if (ata_id_has_trim(args
->id
)) {
2324 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM
, &rbuf
[36]);
2325 put_unaligned_be32(1, &rbuf
[28]);
2331 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2333 int form_factor
= ata_id_form_factor(args
->id
);
2334 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2335 u8 zoned
= ata_id_zoned_cap(args
->id
);
2339 rbuf
[4] = media_rotation_rate
>> 8;
2340 rbuf
[5] = media_rotation_rate
;
2341 rbuf
[7] = form_factor
;
2343 rbuf
[8] = (zoned
<< 4);
2348 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2350 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2353 rbuf
[5] = 1 << 6; /* TPWS */
2358 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args
*args
, u8
*rbuf
)
2361 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2367 * URSWRZ bit is only meaningful for host-managed ZAC drives
2369 if (args
->dev
->zac_zoned_cap
& 1)
2371 put_unaligned_be32(args
->dev
->zac_zones_optimal_open
, &rbuf
[8]);
2372 put_unaligned_be32(args
->dev
->zac_zones_optimal_nonseq
, &rbuf
[12]);
2373 put_unaligned_be32(args
->dev
->zac_zones_max_open
, &rbuf
[16]);
2379 * ata_scsiop_noop - Command handler that simply returns success.
2380 * @args: device IDENTIFY data / SCSI command of interest.
2381 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2383 * No operation. Simply returns success to caller, to indicate
2384 * that the caller should successfully complete this SCSI command.
2387 * spin_lock_irqsave(host lock)
2389 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2396 * modecpy - Prepare response for MODE SENSE
2397 * @dest: output buffer
2398 * @src: data being copied
2399 * @n: length of mode page
2400 * @changeable: whether changeable parameters are requested
2402 * Generate a generic MODE SENSE page for either current or changeable
2408 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2411 memcpy(dest
, src
, 2);
2412 memset(dest
+ 2, 0, n
- 2);
2414 memcpy(dest
, src
, n
);
2419 * ata_msense_caching - Simulate MODE SENSE caching info page
2420 * @id: device IDENTIFY data
2421 * @buf: output buffer
2422 * @changeable: whether changeable parameters are requested
2424 * Generate a caching info page, which conditionally indicates
2425 * write caching to the SCSI layer, depending on device
2431 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2433 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2435 buf
[2] |= (1 << 2); /* ata_mselect_caching() */
2437 buf
[2] |= (ata_id_wcache_enabled(id
) << 2); /* write cache enable */
2438 buf
[12] |= (!ata_id_rahead_enabled(id
) << 5); /* disable read ahead */
2440 return sizeof(def_cache_mpage
);
2444 * ata_msense_control - Simulate MODE SENSE control mode page
2445 * @dev: ATA device of interest
2446 * @buf: output buffer
2447 * @changeable: whether changeable parameters are requested
2449 * Generate a generic MODE SENSE control mode page.
2454 static unsigned int ata_msense_control(struct ata_device
*dev
, u8
*buf
,
2457 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2459 buf
[2] |= (1 << 2); /* ata_mselect_control() */
2461 bool d_sense
= (dev
->flags
& ATA_DFLAG_D_SENSE
);
2463 buf
[2] |= (d_sense
<< 2); /* descriptor format sense data */
2465 return sizeof(def_control_mpage
);
2469 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2470 * @buf: output buffer
2471 * @changeable: whether changeable parameters are requested
2473 * Generate a generic MODE SENSE r/w error recovery page.
2478 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2480 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2482 return sizeof(def_rw_recovery_mpage
);
2486 * We can turn this into a real blacklist if it's needed, for now just
2487 * blacklist any Maxtor BANC1G10 revision firmware
2489 static int ata_dev_supports_fua(u16
*id
)
2491 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2495 if (!ata_id_has_fua(id
))
2498 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2499 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2501 if (strcmp(model
, "Maxtor"))
2503 if (strcmp(fw
, "BANC1G10"))
2506 return 0; /* blacklisted */
2510 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2511 * @args: device IDENTIFY data / SCSI command of interest.
2512 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2514 * Simulate MODE SENSE commands. Assume this is invoked for direct
2515 * access devices (e.g. disks) only. There should be no block
2516 * descriptor for other device types.
2519 * spin_lock_irqsave(host lock)
2521 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2523 struct ata_device
*dev
= args
->dev
;
2524 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2525 const u8 sat_blk_desc
[] = {
2526 0, 0, 0, 0, /* number of blocks: sat unspecified */
2528 0, 0x2, 0x0 /* block length: 512 bytes */
2531 unsigned int ebd
, page_control
, six_byte
;
2532 u8 dpofua
, bp
= 0xff;
2537 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2538 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2540 * LLBA bit in msense(10) ignored (compliant)
2543 page_control
= scsicmd
[2] >> 6;
2544 switch (page_control
) {
2545 case 0: /* current */
2546 case 1: /* changeable */
2547 case 2: /* defaults */
2548 break; /* supported */
2550 goto saving_not_supp
;
2558 p
+= 4 + (ebd
? 8 : 0);
2560 p
+= 8 + (ebd
? 8 : 0);
2562 pg
= scsicmd
[2] & 0x3f;
2565 * No mode subpages supported (yet) but asking for _all_
2566 * subpages may be valid
2568 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
2574 case RW_RECOVERY_MPAGE
:
2575 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2579 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2583 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2587 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2588 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2589 p
+= ata_msense_control(args
->dev
, p
, page_control
== 1);
2592 default: /* invalid page code */
2598 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2599 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2603 rbuf
[0] = p
- rbuf
- 1;
2606 rbuf
[3] = sizeof(sat_blk_desc
);
2607 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2610 unsigned int output_len
= p
- rbuf
- 2;
2612 rbuf
[0] = output_len
>> 8;
2613 rbuf
[1] = output_len
;
2616 rbuf
[7] = sizeof(sat_blk_desc
);
2617 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2623 ata_scsi_set_invalid_field(dev
, args
->cmd
, fp
, bp
);
2627 ata_scsi_set_sense(dev
, args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2628 /* "Saving parameters not supported" */
2633 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2634 * @args: device IDENTIFY data / SCSI command of interest.
2635 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2637 * Simulate READ CAPACITY commands.
2642 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2644 struct ata_device
*dev
= args
->dev
;
2645 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2646 u32 sector_size
; /* physical sector size in bytes */
2650 sector_size
= ata_id_logical_sector_size(dev
->id
);
2651 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2652 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2656 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2657 if (last_lba
>= 0xffffffffULL
)
2658 last_lba
= 0xffffffff;
2660 /* sector count, 32-bit */
2661 rbuf
[0] = last_lba
>> (8 * 3);
2662 rbuf
[1] = last_lba
>> (8 * 2);
2663 rbuf
[2] = last_lba
>> (8 * 1);
2667 rbuf
[4] = sector_size
>> (8 * 3);
2668 rbuf
[5] = sector_size
>> (8 * 2);
2669 rbuf
[6] = sector_size
>> (8 * 1);
2670 rbuf
[7] = sector_size
;
2672 /* sector count, 64-bit */
2673 rbuf
[0] = last_lba
>> (8 * 7);
2674 rbuf
[1] = last_lba
>> (8 * 6);
2675 rbuf
[2] = last_lba
>> (8 * 5);
2676 rbuf
[3] = last_lba
>> (8 * 4);
2677 rbuf
[4] = last_lba
>> (8 * 3);
2678 rbuf
[5] = last_lba
>> (8 * 2);
2679 rbuf
[6] = last_lba
>> (8 * 1);
2683 rbuf
[ 8] = sector_size
>> (8 * 3);
2684 rbuf
[ 9] = sector_size
>> (8 * 2);
2685 rbuf
[10] = sector_size
>> (8 * 1);
2686 rbuf
[11] = sector_size
;
2689 rbuf
[13] = log2_per_phys
;
2690 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2691 rbuf
[15] = lowest_aligned
;
2693 if (ata_id_has_trim(args
->id
) &&
2694 !(dev
->horkage
& ATA_HORKAGE_NOTRIM
)) {
2695 rbuf
[14] |= 0x80; /* LBPME */
2697 if (ata_id_has_zero_after_trim(args
->id
) &&
2698 dev
->horkage
& ATA_HORKAGE_ZERO_AFTER_TRIM
) {
2699 ata_dev_info(dev
, "Enabling discard_zeroes_data\n");
2700 rbuf
[14] |= 0x40; /* LBPRZ */
2703 if (ata_id_zoned_cap(args
->id
) ||
2704 args
->dev
->class == ATA_DEV_ZAC
)
2705 rbuf
[12] = (1 << 4); /* RC_BASIS */
2711 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2712 * @args: device IDENTIFY data / SCSI command of interest.
2713 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2715 * Simulate REPORT LUNS command.
2718 * spin_lock_irqsave(host lock)
2720 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2723 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2728 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2730 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2731 /* FIXME: not quite right; we don't want the
2732 * translation of taskfile registers into
2733 * a sense descriptors, since that's only
2734 * correct for ATA, not ATAPI
2736 ata_gen_passthru_sense(qc
);
2742 /* is it pointless to prefer PIO for "safety reasons"? */
2743 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2745 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2748 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2750 struct ata_port
*ap
= qc
->ap
;
2751 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2753 DPRINTK("ATAPI request sense\n");
2755 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2757 #ifdef CONFIG_ATA_SFF
2758 if (ap
->ops
->sff_tf_read
)
2759 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2762 /* fill these in, for the case where they are -not- overwritten */
2763 cmd
->sense_buffer
[0] = 0x70;
2764 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2768 /* setup sg table and init transfer direction */
2769 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2770 ata_sg_init(qc
, &qc
->sgent
, 1);
2771 qc
->dma_dir
= DMA_FROM_DEVICE
;
2773 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2774 qc
->cdb
[0] = REQUEST_SENSE
;
2775 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2777 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2778 qc
->tf
.command
= ATA_CMD_PACKET
;
2780 if (ata_pio_use_silly(ap
)) {
2781 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2782 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2784 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2785 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2788 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2790 qc
->complete_fn
= atapi_sense_complete
;
2797 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2799 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2800 unsigned int err_mask
= qc
->err_mask
;
2802 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2804 /* handle completion from new EH */
2805 if (unlikely(qc
->ap
->ops
->error_handler
&&
2806 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2808 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2809 /* FIXME: not quite right; we don't want the
2810 * translation of taskfile registers into a
2811 * sense descriptors, since that's only
2812 * correct for ATA, not ATAPI
2814 ata_gen_passthru_sense(qc
);
2817 /* SCSI EH automatically locks door if sdev->locked is
2818 * set. Sometimes door lock request continues to
2819 * fail, for example, when no media is present. This
2820 * creates a loop - SCSI EH issues door lock which
2821 * fails and gets invoked again to acquire sense data
2822 * for the failed command.
2824 * If door lock fails, always clear sdev->locked to
2825 * avoid this infinite loop.
2827 * This may happen before SCSI scan is complete. Make
2828 * sure qc->dev->sdev isn't NULL before dereferencing.
2830 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2831 qc
->dev
->sdev
->locked
= 0;
2833 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2838 /* successful completion or old EH failure path */
2839 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2840 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2841 atapi_request_sense(qc
);
2843 } else if (unlikely(err_mask
)) {
2844 /* FIXME: not quite right; we don't want the
2845 * translation of taskfile registers into
2846 * a sense descriptors, since that's only
2847 * correct for ATA, not ATAPI
2849 ata_gen_passthru_sense(qc
);
2851 u8
*scsicmd
= cmd
->cmnd
;
2853 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2854 unsigned long flags
;
2857 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2859 /* ATAPI devices typically report zero for their SCSI version,
2860 * and sometimes deviate from the spec WRT response data
2861 * format. If SCSI version is reported as zero like normal,
2862 * then we make the following fixups: 1) Fake MMC-5 version,
2863 * to indicate to the Linux scsi midlayer this is a modern
2864 * device. 2) Ensure response data format / ATAPI information
2865 * are always correct.
2872 ata_scsi_rbuf_put(cmd
, true, &flags
);
2875 cmd
->result
= SAM_STAT_GOOD
;
2881 * atapi_xlat - Initialize PACKET taskfile
2882 * @qc: command structure to be initialized
2885 * spin_lock_irqsave(host lock)
2888 * Zero on success, non-zero on failure.
2890 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2892 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2893 struct ata_device
*dev
= qc
->dev
;
2894 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2895 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2896 unsigned int nbytes
;
2898 memset(qc
->cdb
, 0, dev
->cdb_len
);
2899 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2901 qc
->complete_fn
= atapi_qc_complete
;
2903 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2904 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2905 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2906 DPRINTK("direction: write\n");
2909 qc
->tf
.command
= ATA_CMD_PACKET
;
2910 ata_qc_set_pc_nbytes(qc
);
2912 /* check whether ATAPI DMA is safe */
2913 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2916 /* Some controller variants snoop this value for Packet
2917 * transfers to do state machine and FIFO management. Thus we
2918 * want to set it properly, and for DMA where it is
2919 * effectively meaningless.
2921 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2923 /* Most ATAPI devices which honor transfer chunk size don't
2924 * behave according to the spec when odd chunk size which
2925 * matches the transfer length is specified. If the number of
2926 * bytes to transfer is 2n+1. According to the spec, what
2927 * should happen is to indicate that 2n+1 is going to be
2928 * transferred and transfer 2n+2 bytes where the last byte is
2931 * In practice, this doesn't happen. ATAPI devices first
2932 * indicate and transfer 2n bytes and then indicate and
2933 * transfer 2 bytes where the last byte is padding.
2935 * This inconsistency confuses several controllers which
2936 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2937 * These controllers use actual number of transferred bytes to
2938 * update DMA poitner and transfer of 4n+2 bytes make those
2939 * controller push DMA pointer by 4n+4 bytes because SATA data
2940 * FISes are aligned to 4 bytes. This causes data corruption
2941 * and buffer overrun.
2943 * Always setting nbytes to even number solves this problem
2944 * because then ATAPI devices don't have to split data at 2n
2950 qc
->tf
.lbam
= (nbytes
& 0xFF);
2951 qc
->tf
.lbah
= (nbytes
>> 8);
2954 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2956 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2959 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2960 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2962 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2963 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2964 /* some SATA bridges need us to indicate data xfer direction */
2965 qc
->tf
.feature
|= ATAPI_DMADIR
;
2969 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2970 as ATAPI tape drives don't get this right otherwise */
2974 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2976 if (!sata_pmp_attached(ap
)) {
2977 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2978 return &ap
->link
.device
[devno
];
2980 if (likely(devno
< ap
->nr_pmp_links
))
2981 return &ap
->pmp_link
[devno
].device
[0];
2987 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2988 const struct scsi_device
*scsidev
)
2992 /* skip commands not addressed to targets we simulate */
2993 if (!sata_pmp_attached(ap
)) {
2994 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2996 devno
= scsidev
->id
;
2998 if (unlikely(scsidev
->id
|| scsidev
->lun
))
3000 devno
= scsidev
->channel
;
3003 return ata_find_dev(ap
, devno
);
3007 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3008 * @ap: ATA port to which the device is attached
3009 * @scsidev: SCSI device from which we derive the ATA device
3011 * Given various information provided in struct scsi_cmnd,
3012 * map that onto an ATA bus, and using that mapping
3013 * determine which ata_device is associated with the
3014 * SCSI command to be sent.
3017 * spin_lock_irqsave(host lock)
3020 * Associated ATA device, or %NULL if not found.
3022 static struct ata_device
*
3023 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
3025 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
3027 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
3034 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3035 * @byte1: Byte 1 from pass-thru CDB.
3038 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3041 ata_scsi_map_proto(u8 byte1
)
3043 switch((byte1
& 0x1e) >> 1) {
3044 case 3: /* Non-data */
3045 return ATA_PROT_NODATA
;
3048 case 10: /* UDMA Data-in */
3049 case 11: /* UDMA Data-Out */
3050 return ATA_PROT_DMA
;
3052 case 4: /* PIO Data-in */
3053 case 5: /* PIO Data-out */
3054 return ATA_PROT_PIO
;
3056 case 12: /* FPDMA */
3057 return ATA_PROT_NCQ
;
3059 case 0: /* Hard Reset */
3061 case 8: /* Device Diagnostic */
3062 case 9: /* Device Reset */
3063 case 7: /* DMA Queued */
3064 case 15: /* Return Response Info */
3065 default: /* Reserved */
3069 return ATA_PROT_UNKNOWN
;
3073 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3074 * @qc: command structure to be initialized
3076 * Handles either 12 or 16-byte versions of the CDB.
3079 * Zero on success, non-zero on failure.
3081 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
3083 struct ata_taskfile
*tf
= &(qc
->tf
);
3084 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3085 struct ata_device
*dev
= qc
->dev
;
3086 const u8
*cdb
= scmd
->cmnd
;
3089 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
) {
3094 if (ata_is_ncq(tf
->protocol
) && (cdb
[2] & 0x3) == 0)
3095 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3098 tf
->flags
|= ATA_TFLAG_LBA
;
3101 * 12 and 16 byte CDBs use different offsets to
3102 * provide the various register values.
3104 if (cdb
[0] == ATA_16
) {
3106 * 16-byte CDB - may contain extended commands.
3108 * If that is the case, copy the upper byte register values.
3110 if (cdb
[1] & 0x01) {
3111 tf
->hob_feature
= cdb
[3];
3112 tf
->hob_nsect
= cdb
[5];
3113 tf
->hob_lbal
= cdb
[7];
3114 tf
->hob_lbam
= cdb
[9];
3115 tf
->hob_lbah
= cdb
[11];
3116 tf
->flags
|= ATA_TFLAG_LBA48
;
3118 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3121 * Always copy low byte, device and command registers.
3123 tf
->feature
= cdb
[4];
3128 tf
->device
= cdb
[13];
3129 tf
->command
= cdb
[14];
3132 * 12-byte CDB - incapable of extended commands.
3134 tf
->flags
&= ~ATA_TFLAG_LBA48
;
3136 tf
->feature
= cdb
[3];
3141 tf
->device
= cdb
[8];
3142 tf
->command
= cdb
[9];
3145 /* For NCQ commands copy the tag value */
3146 if (ata_is_ncq(tf
->protocol
))
3147 tf
->nsect
= qc
->tag
<< 3;
3149 /* enforce correct master/slave bit */
3150 tf
->device
= dev
->devno
?
3151 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
3153 switch (tf
->command
) {
3154 /* READ/WRITE LONG use a non-standard sect_size */
3155 case ATA_CMD_READ_LONG
:
3156 case ATA_CMD_READ_LONG_ONCE
:
3157 case ATA_CMD_WRITE_LONG
:
3158 case ATA_CMD_WRITE_LONG_ONCE
:
3159 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1) {
3163 qc
->sect_size
= scsi_bufflen(scmd
);
3166 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3167 case ATA_CMD_CFA_WRITE_NE
:
3168 case ATA_CMD_CFA_TRANS_SECT
:
3169 case ATA_CMD_CFA_WRITE_MULT_NE
:
3170 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3172 case ATA_CMD_READ_EXT
:
3173 case ATA_CMD_READ_QUEUED
:
3174 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3175 case ATA_CMD_FPDMA_READ
:
3176 case ATA_CMD_READ_MULTI
:
3177 case ATA_CMD_READ_MULTI_EXT
:
3178 case ATA_CMD_PIO_READ
:
3179 case ATA_CMD_PIO_READ_EXT
:
3180 case ATA_CMD_READ_STREAM_DMA_EXT
:
3181 case ATA_CMD_READ_STREAM_EXT
:
3182 case ATA_CMD_VERIFY
:
3183 case ATA_CMD_VERIFY_EXT
:
3185 case ATA_CMD_WRITE_EXT
:
3186 case ATA_CMD_WRITE_FUA_EXT
:
3187 case ATA_CMD_WRITE_QUEUED
:
3188 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
3189 case ATA_CMD_FPDMA_WRITE
:
3190 case ATA_CMD_WRITE_MULTI
:
3191 case ATA_CMD_WRITE_MULTI_EXT
:
3192 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
3193 case ATA_CMD_PIO_WRITE
:
3194 case ATA_CMD_PIO_WRITE_EXT
:
3195 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
3196 case ATA_CMD_WRITE_STREAM_EXT
:
3197 qc
->sect_size
= scmd
->device
->sector_size
;
3200 /* Everything else uses 512 byte "sectors" */
3202 qc
->sect_size
= ATA_SECT_SIZE
;
3206 * Set flags so that all registers will be written, pass on
3207 * write indication (used for PIO/DMA setup), result TF is
3208 * copied back and we don't whine too much about its failure.
3210 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3211 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3212 tf
->flags
|= ATA_TFLAG_WRITE
;
3214 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3217 * Set transfer length.
3219 * TODO: find out if we need to do more here to
3220 * cover scatter/gather case.
3222 ata_qc_set_pc_nbytes(qc
);
3224 /* We may not issue DMA commands if no DMA mode is set */
3225 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0) {
3230 /* sanity check for pio multi commands */
3231 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
)) {
3236 if (is_multi_taskfile(tf
)) {
3237 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3239 /* compare the passed through multi_count
3240 * with the cached multi_count of libata
3242 if (multi_count
!= dev
->multi_count
)
3243 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3248 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3249 * SET_FEATURES - XFER MODE must be preceded/succeeded
3250 * by an update to hardware-specific registers for each
3251 * controller (i.e. the reason for ->set_piomode(),
3252 * ->set_dmamode(), and ->post_set_mode() hooks).
3254 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3255 tf
->feature
== SETFEATURES_XFER
) {
3256 fp
= (cdb
[0] == ATA_16
) ? 4 : 3;
3261 * Filter TPM commands by default. These provide an
3262 * essentially uncontrolled encrypted "back door" between
3263 * applications and the disk. Set libata.allow_tpm=1 if you
3264 * have a real reason for wanting to use them. This ensures
3265 * that installed software cannot easily mess stuff up without
3266 * user intent. DVR type users will probably ship with this enabled
3267 * for movie content management.
3269 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3270 * for this and should do in future but that it is not sufficient as
3271 * DCS is an optional feature set. Thus we also do the software filter
3272 * so that we comply with the TC consortium stated goal that the user
3273 * can turn off TC features of their system.
3275 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
) {
3276 fp
= (cdb
[0] == ATA_16
) ? 14 : 9;
3283 ata_scsi_set_invalid_field(dev
, scmd
, fp
, 0xff);
3288 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3289 * @cmd: SCSI command being translated
3290 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3291 * @sector: Starting sector
3292 * @count: Total Range of request in logical sectors
3294 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3297 * Upto 64 entries of the format:
3298 * 63:48 Range Length
3301 * Range Length of 0 is ignored.
3302 * LBA's should be sorted order and not overlap.
3304 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3306 * Return: Number of bytes copied into sglist.
3308 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd
*cmd
, u32 trmax
,
3309 u64 sector
, u32 count
)
3311 struct scsi_device
*sdp
= cmd
->device
;
3312 size_t len
= sdp
->sector_size
;
3316 unsigned long flags
;
3318 WARN_ON(len
> ATA_SCSI_RBUF_SIZE
);
3320 if (len
> ATA_SCSI_RBUF_SIZE
)
3321 len
= ATA_SCSI_RBUF_SIZE
;
3323 spin_lock_irqsave(&ata_scsi_rbuf_lock
, flags
);
3324 buf
= ((void *)ata_scsi_rbuf
);
3325 memset(buf
, 0, len
);
3327 u64 entry
= sector
|
3328 ((u64
)(count
> 0xffff ? 0xffff : count
) << 48);
3329 buf
[i
++] = __cpu_to_le64(entry
);
3330 if (count
<= 0xffff)
3335 r
= sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, len
);
3336 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, flags
);
3342 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same
3343 * @cmd: SCSI command being translated
3344 * @lba: Starting sector
3345 * @num: Number of sectors to be zero'd.
3347 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted
3349 * NOTE: Writes a pattern (0's) in the foreground.
3351 * Return: Number of bytes copied into sglist.
3353 static size_t ata_format_sct_write_same(struct scsi_cmnd
*cmd
, u64 lba
, u64 num
)
3355 struct scsi_device
*sdp
= cmd
->device
;
3356 size_t len
= sdp
->sector_size
;
3359 unsigned long flags
;
3361 spin_lock_irqsave(&ata_scsi_rbuf_lock
, flags
);
3362 buf
= ((void *)ata_scsi_rbuf
);
3364 put_unaligned_le16(0x0002, &buf
[0]); /* SCT_ACT_WRITE_SAME */
3365 put_unaligned_le16(0x0101, &buf
[1]); /* WRITE PTRN FG */
3366 put_unaligned_le64(lba
, &buf
[2]);
3367 put_unaligned_le64(num
, &buf
[6]);
3368 put_unaligned_le32(0u, &buf
[10]); /* pattern */
3370 WARN_ON(len
> ATA_SCSI_RBUF_SIZE
);
3372 if (len
> ATA_SCSI_RBUF_SIZE
)
3373 len
= ATA_SCSI_RBUF_SIZE
;
3375 r
= sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
), buf
, len
);
3376 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, flags
);
3382 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3383 * @qc: Command to be translated
3385 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3386 * an SCT Write Same command.
3387 * Based on WRITE SAME has the UNMAP flag
3388 * When set translate to DSM TRIM
3389 * When clear translate to SCT Write Same
3391 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3393 struct ata_taskfile
*tf
= &qc
->tf
;
3394 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3395 struct scsi_device
*sdp
= scmd
->device
;
3396 size_t len
= sdp
->sector_size
;
3397 struct ata_device
*dev
= qc
->dev
;
3398 const u8
*cdb
= scmd
->cmnd
;
3401 const u32 trmax
= len
>> 3;
3405 u8 unmap
= cdb
[1] & 0x8;
3407 /* we may not issue DMA commands if no DMA mode is set */
3408 if (unlikely(!dev
->dma_mode
))
3409 goto invalid_opcode
;
3411 if (unlikely(scmd
->cmd_len
< 16)) {
3415 scsi_16_lba_len(cdb
, &block
, &n_block
);
3418 /* If trim is not enabled the cmd is invalid. */
3419 if ((dev
->horkage
& ATA_HORKAGE_NOTRIM
) ||
3420 !ata_id_has_trim(dev
->id
)) {
3425 /* If the request is too large the cmd is invalid */
3426 if (n_block
> 0xffff * trmax
) {
3431 /* If write same is not available the cmd is invalid */
3432 if (!ata_id_sct_write_same(dev
->id
)) {
3440 * WRITE SAME always has a sector sized buffer as payload, this
3441 * should never be a multiple entry S/G list.
3443 if (!scsi_sg_count(scmd
))
3444 goto invalid_param_len
;
3447 * size must match sector size in bytes
3448 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3449 * is defined as number of 512 byte blocks to be transferred.
3452 size
= ata_format_dsm_trim_descr(scmd
, trmax
, block
, n_block
);
3454 goto invalid_param_len
;
3456 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3457 /* Newer devices support queued TRIM commands */
3458 tf
->protocol
= ATA_PROT_NCQ
;
3459 tf
->command
= ATA_CMD_FPDMA_SEND
;
3460 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3461 tf
->nsect
= qc
->tag
<< 3;
3462 tf
->hob_feature
= (size
/ 512) >> 8;
3463 tf
->feature
= size
/ 512;
3467 tf
->protocol
= ATA_PROT_DMA
;
3468 tf
->hob_feature
= 0;
3469 tf
->feature
= ATA_DSM_TRIM
;
3470 tf
->hob_nsect
= (size
/ 512) >> 8;
3471 tf
->nsect
= size
/ 512;
3472 tf
->command
= ATA_CMD_DSM
;
3475 size
= ata_format_sct_write_same(scmd
, block
, n_block
);
3477 goto invalid_param_len
;
3479 tf
->hob_feature
= 0;
3485 tf
->lbal
= ATA_CMD_STANDBYNOW1
;
3489 tf
->device
= ATA_CMD_STANDBYNOW1
;
3490 tf
->protocol
= ATA_PROT_DMA
;
3491 tf
->command
= ATA_CMD_WRITE_LOG_DMA_EXT
;
3492 if (unlikely(dev
->flags
& ATA_DFLAG_PIO
))
3493 tf
->command
= ATA_CMD_WRITE_LOG_EXT
;
3496 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3499 ata_qc_set_pc_nbytes(qc
);
3504 ata_scsi_set_invalid_field(dev
, scmd
, fp
, bp
);
3507 /* "Parameter list length error" */
3508 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3511 /* "Invalid command operation code" */
3512 ata_scsi_set_sense(dev
, scmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3517 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3518 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3519 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3521 * Yields a subset to satisfy scsi_report_opcode()
3524 * spin_lock_irqsave(host lock)
3526 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args
*args
, u8
*rbuf
)
3528 struct ata_device
*dev
= args
->dev
;
3529 u8
*cdb
= args
->cmd
->cmnd
;
3531 unsigned int err
= 0;
3534 ata_dev_warn(dev
, "invalid command format %d\n", cdb
[2]);
3543 case SERVICE_ACTION_IN_16
:
3546 case SYNCHRONIZE_CACHE
:
3550 case TEST_UNIT_READY
:
3551 case SEND_DIAGNOSTIC
:
3552 case MAINTENANCE_IN
:
3564 case MODE_SELECT_10
:
3569 if (!ata_id_sct_write_same(dev
->id
))
3571 /* fallthrough: if SCT ... only enable for ZBC */
3574 if (ata_id_zoned_cap(dev
->id
) ||
3575 dev
->class == ATA_DEV_ZAC
)
3582 rbuf
[1] = supported
; /* supported */
3587 * ata_scsi_report_zones_complete - convert ATA output
3588 * @qc: command structure returning the data
3590 * Convert T-13 little-endian field representation into
3591 * T-10 big-endian field representation.
3594 static void ata_scsi_report_zones_complete(struct ata_queued_cmd
*qc
)
3596 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3597 struct sg_mapping_iter miter
;
3598 unsigned long flags
;
3599 unsigned int bytes
= 0;
3601 sg_miter_start(&miter
, scsi_sglist(scmd
), scsi_sg_count(scmd
),
3602 SG_MITER_TO_SG
| SG_MITER_ATOMIC
);
3604 local_irq_save(flags
);
3605 while (sg_miter_next(&miter
)) {
3606 unsigned int offset
= 0;
3611 u64 max_lba
, opt_lba
;
3614 /* Swizzle header */
3616 list_length
= get_unaligned_le32(&hdr
[0]);
3617 same
= get_unaligned_le16(&hdr
[4]);
3618 max_lba
= get_unaligned_le64(&hdr
[8]);
3619 opt_lba
= get_unaligned_le64(&hdr
[16]);
3620 put_unaligned_be32(list_length
, &hdr
[0]);
3621 hdr
[4] = same
& 0xf;
3622 put_unaligned_be64(max_lba
, &hdr
[8]);
3623 put_unaligned_be64(opt_lba
, &hdr
[16]);
3627 while (offset
< miter
.length
) {
3629 u8 cond
, type
, non_seq
, reset
;
3630 u64 size
, start
, wp
;
3632 /* Swizzle zone descriptor */
3633 rec
= miter
.addr
+ offset
;
3634 type
= rec
[0] & 0xf;
3635 cond
= (rec
[1] >> 4) & 0xf;
3636 non_seq
= (rec
[1] & 2);
3637 reset
= (rec
[1] & 1);
3638 size
= get_unaligned_le64(&rec
[8]);
3639 start
= get_unaligned_le64(&rec
[16]);
3640 wp
= get_unaligned_le64(&rec
[24]);
3642 rec
[1] = (cond
<< 4) | non_seq
| reset
;
3643 put_unaligned_be64(size
, &rec
[8]);
3644 put_unaligned_be64(start
, &rec
[16]);
3645 put_unaligned_be64(wp
, &rec
[24]);
3646 WARN_ON(offset
+ 64 > miter
.length
);
3651 sg_miter_stop(&miter
);
3652 local_irq_restore(flags
);
3654 ata_scsi_qc_complete(qc
);
3657 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd
*qc
)
3659 struct ata_taskfile
*tf
= &qc
->tf
;
3660 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3661 const u8
*cdb
= scmd
->cmnd
;
3662 u16 sect
, fp
= (u16
)-1;
3663 u8 sa
, options
, bp
= 0xff;
3667 if (unlikely(scmd
->cmd_len
< 16)) {
3668 ata_dev_warn(qc
->dev
, "invalid cdb length %d\n",
3673 scsi_16_lba_len(cdb
, &block
, &n_block
);
3674 if (n_block
!= scsi_bufflen(scmd
)) {
3675 ata_dev_warn(qc
->dev
, "non-matching transfer count (%d/%d)\n",
3676 n_block
, scsi_bufflen(scmd
));
3677 goto invalid_param_len
;
3680 if (sa
!= ZI_REPORT_ZONES
) {
3681 ata_dev_warn(qc
->dev
, "invalid service action %d\n", sa
);
3686 * ZAC allows only for transfers in 512 byte blocks,
3687 * and uses a 16 bit value for the transfer count.
3689 if ((n_block
/ 512) > 0xffff || n_block
< 512 || (n_block
% 512)) {
3690 ata_dev_warn(qc
->dev
, "invalid transfer count %d\n", n_block
);
3691 goto invalid_param_len
;
3693 sect
= n_block
/ 512;
3694 options
= cdb
[14] & 0xbf;
3696 if (ata_ncq_enabled(qc
->dev
) &&
3697 ata_fpdma_zac_mgmt_in_supported(qc
->dev
)) {
3698 tf
->protocol
= ATA_PROT_NCQ
;
3699 tf
->command
= ATA_CMD_FPDMA_RECV
;
3700 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN
& 0x1f;
3701 tf
->nsect
= qc
->tag
<< 3;
3702 tf
->feature
= sect
& 0xff;
3703 tf
->hob_feature
= (sect
>> 8) & 0xff;
3704 tf
->auxiliary
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
| (options
<< 8);
3706 tf
->command
= ATA_CMD_ZAC_MGMT_IN
;
3707 tf
->feature
= ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES
;
3708 tf
->protocol
= ATA_PROT_DMA
;
3709 tf
->hob_feature
= options
;
3710 tf
->hob_nsect
= (sect
>> 8) & 0xff;
3711 tf
->nsect
= sect
& 0xff;
3713 tf
->device
= ATA_LBA
;
3714 tf
->lbah
= (block
>> 16) & 0xff;
3715 tf
->lbam
= (block
>> 8) & 0xff;
3716 tf
->lbal
= block
& 0xff;
3717 tf
->hob_lbah
= (block
>> 40) & 0xff;
3718 tf
->hob_lbam
= (block
>> 32) & 0xff;
3719 tf
->hob_lbal
= (block
>> 24) & 0xff;
3721 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3722 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
3724 ata_qc_set_pc_nbytes(qc
);
3726 qc
->complete_fn
= ata_scsi_report_zones_complete
;
3731 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
3735 /* "Parameter list length error" */
3736 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3740 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd
*qc
)
3742 struct ata_taskfile
*tf
= &qc
->tf
;
3743 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3744 struct ata_device
*dev
= qc
->dev
;
3745 const u8
*cdb
= scmd
->cmnd
;
3751 if (unlikely(scmd
->cmd_len
< 16)) {
3757 if ((sa
!= ZO_CLOSE_ZONE
) && (sa
!= ZO_FINISH_ZONE
) &&
3758 (sa
!= ZO_OPEN_ZONE
) && (sa
!= ZO_RESET_WRITE_POINTER
)) {
3763 scsi_16_lba_len(cdb
, &block
, &n_block
);
3766 * ZAC MANAGEMENT OUT doesn't define any length
3768 goto invalid_param_len
;
3770 if (block
> dev
->n_sectors
)
3773 all
= cdb
[14] & 0x1;
3775 if (ata_ncq_enabled(qc
->dev
) &&
3776 ata_fpdma_zac_mgmt_out_supported(qc
->dev
)) {
3777 tf
->protocol
= ATA_PROT_NCQ_NODATA
;
3778 tf
->command
= ATA_CMD_NCQ_NON_DATA
;
3779 tf
->feature
= ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT
;
3780 tf
->nsect
= qc
->tag
<< 3;
3781 tf
->auxiliary
= sa
| ((u16
)all
<< 8);
3783 tf
->protocol
= ATA_PROT_NODATA
;
3784 tf
->command
= ATA_CMD_ZAC_MGMT_OUT
;
3786 tf
->hob_feature
= all
;
3788 tf
->lbah
= (block
>> 16) & 0xff;
3789 tf
->lbam
= (block
>> 8) & 0xff;
3790 tf
->lbal
= block
& 0xff;
3791 tf
->hob_lbah
= (block
>> 40) & 0xff;
3792 tf
->hob_lbam
= (block
>> 32) & 0xff;
3793 tf
->hob_lbal
= (block
>> 24) & 0xff;
3794 tf
->device
= ATA_LBA
;
3795 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
;
3800 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, 0xff);
3803 /* "Logical Block Address out of range" */
3804 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x21, 0x00);
3807 /* "Parameter list length error" */
3808 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3813 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3814 * @qc: Storage for translated ATA taskfile
3815 * @buf: input buffer
3816 * @len: number of valid bytes in the input buffer
3817 * @fp: out parameter for the failed field on error
3819 * Prepare a taskfile to modify caching information for the device.
3824 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3825 const u8
*buf
, int len
, u16
*fp
)
3827 struct ata_taskfile
*tf
= &qc
->tf
;
3828 struct ata_device
*dev
= qc
->dev
;
3829 u8 mpage
[CACHE_MPAGE_LEN
];
3834 * The first two bytes of def_cache_mpage are a header, so offsets
3835 * in mpage are off by 2 compared to buf. Same for len.
3838 if (len
!= CACHE_MPAGE_LEN
- 2) {
3839 if (len
< CACHE_MPAGE_LEN
- 2)
3842 *fp
= CACHE_MPAGE_LEN
- 2;
3846 wce
= buf
[0] & (1 << 2);
3849 * Check that read-only bits are not modified.
3851 ata_msense_caching(dev
->id
, mpage
, false);
3852 for (i
= 0; i
< CACHE_MPAGE_LEN
- 2; i
++) {
3855 if (mpage
[i
+ 2] != buf
[i
]) {
3861 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3862 tf
->protocol
= ATA_PROT_NODATA
;
3864 tf
->command
= ATA_CMD_SET_FEATURES
;
3865 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3870 * ata_mselect_control - Simulate MODE SELECT for control page
3871 * @qc: Storage for translated ATA taskfile
3872 * @buf: input buffer
3873 * @len: number of valid bytes in the input buffer
3874 * @fp: out parameter for the failed field on error
3876 * Prepare a taskfile to modify caching information for the device.
3881 static int ata_mselect_control(struct ata_queued_cmd
*qc
,
3882 const u8
*buf
, int len
, u16
*fp
)
3884 struct ata_device
*dev
= qc
->dev
;
3885 u8 mpage
[CONTROL_MPAGE_LEN
];
3890 * The first two bytes of def_control_mpage are a header, so offsets
3891 * in mpage are off by 2 compared to buf. Same for len.
3894 if (len
!= CONTROL_MPAGE_LEN
- 2) {
3895 if (len
< CONTROL_MPAGE_LEN
- 2)
3898 *fp
= CONTROL_MPAGE_LEN
- 2;
3902 d_sense
= buf
[0] & (1 << 2);
3905 * Check that read-only bits are not modified.
3907 ata_msense_control(dev
, mpage
, false);
3908 for (i
= 0; i
< CONTROL_MPAGE_LEN
- 2; i
++) {
3911 if (mpage
[2 + i
] != buf
[i
]) {
3916 if (d_sense
& (1 << 2))
3917 dev
->flags
|= ATA_DFLAG_D_SENSE
;
3919 dev
->flags
&= ~ATA_DFLAG_D_SENSE
;
3924 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3925 * @qc: Storage for translated ATA taskfile
3927 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3928 * Assume this is invoked for direct access devices (e.g. disks) only.
3929 * There should be no block descriptor for other device types.
3932 * spin_lock_irqsave(host lock)
3934 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3936 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3937 const u8
*cdb
= scmd
->cmnd
;
3940 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3947 six_byte
= (cdb
[0] == MODE_SELECT
);
3949 if (scmd
->cmd_len
< 5) {
3957 if (scmd
->cmd_len
< 9) {
3962 len
= (cdb
[7] << 8) + cdb
[8];
3966 /* We only support PF=1, SP=0. */
3967 if ((cdb
[1] & 0x11) != 0x10) {
3969 bp
= (cdb
[1] & 0x01) ? 1 : 5;
3973 /* Test early for possible overrun. */
3974 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
3975 goto invalid_param_len
;
3977 p
= page_address(sg_page(scsi_sglist(scmd
)));
3979 /* Move past header and block descriptors. */
3981 goto invalid_param_len
;
3986 bd_len
= (p
[6] << 8) + p
[7];
3991 goto invalid_param_len
;
3992 if (bd_len
!= 0 && bd_len
!= 8) {
3993 fp
= (six_byte
) ? 3 : 6;
3994 fp
+= bd_len
+ hdr_len
;
4003 /* Parse both possible formats for the mode page headers. */
4007 goto invalid_param_len
;
4010 pg_len
= (p
[2] << 8) | p
[3];
4015 goto invalid_param_len
;
4024 * No mode subpages supported (yet) but asking for _all_
4025 * subpages may be valid
4027 if (spg
&& (spg
!= ALL_SUB_MPAGES
)) {
4028 fp
= (p
[0] & 0x40) ? 1 : 0;
4029 fp
+= hdr_len
+ bd_len
;
4033 goto invalid_param_len
;
4037 if (ata_mselect_caching(qc
, p
, pg_len
, &fp
) < 0) {
4038 fp
+= hdr_len
+ bd_len
;
4043 if (ata_mselect_control(qc
, p
, pg_len
, &fp
) < 0) {
4044 fp
+= hdr_len
+ bd_len
;
4047 goto skip
; /* No ATA command to send */
4050 default: /* invalid page code */
4051 fp
= bd_len
+ hdr_len
;
4056 * Only one page has changeable data, so we only support setting one
4065 ata_scsi_set_invalid_field(qc
->dev
, scmd
, fp
, bp
);
4069 ata_scsi_set_invalid_parameter(qc
->dev
, scmd
, fp
);
4073 /* "Parameter list length error" */
4074 ata_scsi_set_sense(qc
->dev
, scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
4078 scmd
->result
= SAM_STAT_GOOD
;
4083 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4085 * @cmd: SCSI command opcode to consider
4087 * Look up the SCSI command given, and determine whether the
4088 * SCSI command is to be translated or simulated.
4091 * Pointer to translation function if possible, %NULL if not.
4094 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
4104 return ata_scsi_rw_xlat
;
4107 return ata_scsi_write_same_xlat
;
4109 case SYNCHRONIZE_CACHE
:
4110 if (ata_try_flush_cache(dev
))
4111 return ata_scsi_flush_xlat
;
4116 return ata_scsi_verify_xlat
;
4120 return ata_scsi_pass_thru
;
4123 case MODE_SELECT_10
:
4124 return ata_scsi_mode_select_xlat
;
4128 return ata_scsi_zbc_in_xlat
;
4131 return ata_scsi_zbc_out_xlat
;
4134 return ata_scsi_start_stop_xlat
;
4141 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4142 * @ap: ATA port to which the command was being sent
4143 * @cmd: SCSI command to dump
4145 * Prints the contents of a SCSI command via printk().
4148 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
4149 struct scsi_cmnd
*cmd
)
4152 struct scsi_device
*scsidev
= cmd
->device
;
4154 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
4156 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
4161 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
4162 struct ata_device
*dev
)
4164 u8 scsi_op
= scmd
->cmnd
[0];
4165 ata_xlat_func_t xlat_func
;
4168 if (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ZAC
) {
4169 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
4172 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4174 if (unlikely(!scmd
->cmd_len
))
4178 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
4179 /* relay SCSI command to ATAPI device */
4180 int len
= COMMAND_SIZE(scsi_op
);
4181 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
4184 xlat_func
= atapi_xlat
;
4186 /* ATA_16 passthru, treat as an ATA command */
4187 if (unlikely(scmd
->cmd_len
> 16))
4190 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
4195 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
4197 ata_scsi_simulate(dev
, scmd
);
4202 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4203 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
4204 scmd
->result
= DID_ERROR
<< 16;
4205 scmd
->scsi_done(scmd
);
4210 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4211 * @shost: SCSI host of command to be sent
4212 * @cmd: SCSI command to be sent
4214 * In some cases, this function translates SCSI commands into
4215 * ATA taskfiles, and queues the taskfiles to be sent to
4216 * hardware. In other cases, this function simulates a
4217 * SCSI device by evaluating and responding to certain
4218 * SCSI commands. This creates the overall effect of
4219 * ATA and ATAPI devices appearing as SCSI devices.
4225 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4228 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
4230 struct ata_port
*ap
;
4231 struct ata_device
*dev
;
4232 struct scsi_device
*scsidev
= cmd
->device
;
4234 unsigned long irq_flags
;
4236 ap
= ata_shost_to_port(shost
);
4238 spin_lock_irqsave(ap
->lock
, irq_flags
);
4240 ata_scsi_dump_cdb(ap
, cmd
);
4242 dev
= ata_scsi_find_dev(ap
, scsidev
);
4244 rc
= __ata_scsi_queuecmd(cmd
, dev
);
4246 cmd
->result
= (DID_BAD_TARGET
<< 16);
4247 cmd
->scsi_done(cmd
);
4250 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
4256 * ata_scsi_simulate - simulate SCSI command on ATA device
4257 * @dev: the target device
4258 * @cmd: SCSI command being sent to device.
4260 * Interprets and directly executes a select list of SCSI commands
4261 * that can be handled internally.
4264 * spin_lock_irqsave(host lock)
4267 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
4269 struct ata_scsi_args args
;
4270 const u8
*scsicmd
= cmd
->cmnd
;
4276 args
.done
= cmd
->scsi_done
;
4278 switch(scsicmd
[0]) {
4280 if (scsicmd
[1] & 2) /* is CmdDt set? */
4281 ata_scsi_invalid_field(dev
, cmd
, 1);
4282 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
4283 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
4284 else switch (scsicmd
[2]) {
4286 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
4289 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
4292 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
4295 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
4298 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
4301 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
4304 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
4307 if (dev
->flags
& ATA_DFLAG_ZAC
) {
4308 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b6
);
4313 ata_scsi_invalid_field(dev
, cmd
, 2);
4320 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
4324 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4327 case SERVICE_ACTION_IN_16
:
4328 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
4329 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
4331 ata_scsi_invalid_field(dev
, cmd
, 1);
4335 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
4339 ata_scsi_set_sense(dev
, cmd
, 0, 0, 0);
4340 cmd
->result
= (DRIVER_SENSE
<< 24);
4341 cmd
->scsi_done(cmd
);
4344 /* if we reach this, then writeback caching is disabled,
4345 * turning this into a no-op.
4347 case SYNCHRONIZE_CACHE
:
4350 /* no-op's, complete with success */
4354 case TEST_UNIT_READY
:
4355 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
4358 case SEND_DIAGNOSTIC
:
4359 tmp8
= scsicmd
[1] & ~(1 << 3);
4360 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
4361 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
4363 ata_scsi_invalid_field(dev
, cmd
, 1);
4366 case MAINTENANCE_IN
:
4367 if (scsicmd
[1] == MI_REPORT_SUPPORTED_OPERATION_CODES
)
4368 ata_scsi_rbuf_fill(&args
, ata_scsiop_maint_in
);
4370 ata_scsi_invalid_field(dev
, cmd
, 1);
4373 /* all other commands */
4375 ata_scsi_set_sense(dev
, cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
4376 /* "Invalid command operation code" */
4377 cmd
->scsi_done(cmd
);
4382 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
4386 for (i
= 0; i
< host
->n_ports
; i
++) {
4387 struct ata_port
*ap
= host
->ports
[i
];
4388 struct Scsi_Host
*shost
;
4391 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
4395 shost
->eh_noresume
= 1;
4396 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
4397 ap
->scsi_host
= shost
;
4399 shost
->transportt
= ata_scsi_transport_template
;
4400 shost
->unique_id
= ap
->print_id
;
4403 shost
->max_channel
= 1;
4404 shost
->max_cmd_len
= 16;
4406 /* Schedule policy is determined by ->qc_defer()
4407 * callback and it needs to see every deferred qc.
4408 * Set host_blocked to 1 to prevent SCSI midlayer from
4409 * automatically deferring requests.
4411 shost
->max_host_blocked
= 1;
4413 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
4414 &ap
->tdev
, ap
->host
->dev
);
4422 scsi_host_put(host
->ports
[i
]->scsi_host
);
4425 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
4427 scsi_remove_host(shost
);
4428 scsi_host_put(shost
);
4433 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
4436 struct ata_device
*last_failed_dev
= NULL
;
4437 struct ata_link
*link
;
4438 struct ata_device
*dev
;
4441 ata_for_each_link(link
, ap
, EDGE
) {
4442 ata_for_each_dev(dev
, link
, ENABLED
) {
4443 struct scsi_device
*sdev
;
4444 int channel
= 0, id
= 0;
4449 if (ata_is_host_link(link
))
4452 channel
= link
->pmp
;
4454 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
4456 if (!IS_ERR(sdev
)) {
4458 scsi_device_put(sdev
);
4465 /* If we scanned while EH was in progress or allocation
4466 * failure occurred, scan would have failed silently. Check
4467 * whether all devices are attached.
4469 ata_for_each_link(link
, ap
, EDGE
) {
4470 ata_for_each_dev(dev
, link
, ENABLED
) {
4479 /* we're missing some SCSI devices */
4481 /* If caller requested synchrnous scan && we've made
4482 * any progress, sleep briefly and repeat.
4484 if (dev
!= last_failed_dev
) {
4486 last_failed_dev
= dev
;
4490 /* We might be failing to detect boot device, give it
4491 * a few more chances.
4499 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4502 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
4503 round_jiffies_relative(HZ
));
4507 * ata_scsi_offline_dev - offline attached SCSI device
4508 * @dev: ATA device to offline attached SCSI device for
4510 * This function is called from ata_eh_hotplug() and responsible
4511 * for taking the SCSI device attached to @dev offline. This
4512 * function is called with host lock which protects dev->sdev
4516 * spin_lock_irqsave(host lock)
4519 * 1 if attached SCSI device exists, 0 otherwise.
4521 int ata_scsi_offline_dev(struct ata_device
*dev
)
4524 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
4531 * ata_scsi_remove_dev - remove attached SCSI device
4532 * @dev: ATA device to remove attached SCSI device for
4534 * This function is called from ata_eh_scsi_hotplug() and
4535 * responsible for removing the SCSI device attached to @dev.
4538 * Kernel thread context (may sleep).
4540 static void ata_scsi_remove_dev(struct ata_device
*dev
)
4542 struct ata_port
*ap
= dev
->link
->ap
;
4543 struct scsi_device
*sdev
;
4544 unsigned long flags
;
4546 /* Alas, we need to grab scan_mutex to ensure SCSI device
4547 * state doesn't change underneath us and thus
4548 * scsi_device_get() always succeeds. The mutex locking can
4549 * be removed if there is __scsi_device_get() interface which
4550 * increments reference counts regardless of device state.
4552 mutex_lock(&ap
->scsi_host
->scan_mutex
);
4553 spin_lock_irqsave(ap
->lock
, flags
);
4555 /* clearing dev->sdev is protected by host lock */
4560 /* If user initiated unplug races with us, sdev can go
4561 * away underneath us after the host lock and
4562 * scan_mutex are released. Hold onto it.
4564 if (scsi_device_get(sdev
) == 0) {
4565 /* The following ensures the attached sdev is
4566 * offline on return from ata_scsi_offline_dev()
4567 * regardless it wins or loses the race
4568 * against this function.
4570 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
4577 spin_unlock_irqrestore(ap
->lock
, flags
);
4578 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
4581 ata_dev_info(dev
, "detaching (SCSI %s)\n",
4582 dev_name(&sdev
->sdev_gendev
));
4584 scsi_remove_device(sdev
);
4585 scsi_device_put(sdev
);
4589 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
4591 struct ata_port
*ap
= link
->ap
;
4592 struct ata_device
*dev
;
4594 ata_for_each_dev(dev
, link
, ALL
) {
4595 unsigned long flags
;
4597 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
4600 spin_lock_irqsave(ap
->lock
, flags
);
4601 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
4602 spin_unlock_irqrestore(ap
->lock
, flags
);
4604 if (zpodd_dev_enabled(dev
))
4607 ata_scsi_remove_dev(dev
);
4612 * ata_scsi_media_change_notify - send media change event
4613 * @dev: Pointer to the disk device with media change event
4615 * Tell the block layer to send a media change notification
4619 * spin_lock_irqsave(host lock)
4621 void ata_scsi_media_change_notify(struct ata_device
*dev
)
4624 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
4629 * ata_scsi_hotplug - SCSI part of hotplug
4630 * @work: Pointer to ATA port to perform SCSI hotplug on
4632 * Perform SCSI part of hotplug. It's executed from a separate
4633 * workqueue after EH completes. This is necessary because SCSI
4634 * hot plugging requires working EH and hot unplugging is
4635 * synchronized with hot plugging with a mutex.
4638 * Kernel thread context (may sleep).
4640 void ata_scsi_hotplug(struct work_struct
*work
)
4642 struct ata_port
*ap
=
4643 container_of(work
, struct ata_port
, hotplug_task
.work
);
4646 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
4647 DPRINTK("ENTER/EXIT - unloading\n");
4654 * The block layer suspend/resume path is fundamentally broken due
4655 * to freezable kthreads and workqueue and may deadlock if a block
4656 * device gets removed while resume is in progress. I don't know
4657 * what the solution is short of removing freezable kthreads and
4658 * workqueues altogether.
4660 * The following is an ugly hack to avoid kicking off device
4661 * removal while freezer is active. This is a joke but does avoid
4662 * this particular deadlock scenario.
4664 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4665 * http://marc.info/?l=linux-kernel&m=138695698516487
4667 #ifdef CONFIG_FREEZER
4673 mutex_lock(&ap
->scsi_scan_mutex
);
4675 /* Unplug detached devices. We cannot use link iterator here
4676 * because PMP links have to be scanned even if PMP is
4677 * currently not attached. Iterate manually.
4679 ata_scsi_handle_link_detach(&ap
->link
);
4681 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
4682 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
4684 /* scan for new ones */
4685 ata_scsi_scan_host(ap
, 0);
4687 mutex_unlock(&ap
->scsi_scan_mutex
);
4692 * ata_scsi_user_scan - indication for user-initiated bus scan
4693 * @shost: SCSI host to scan
4694 * @channel: Channel to scan
4698 * This function is called when user explicitly requests bus
4699 * scan. Set probe pending flag and invoke EH.
4702 * SCSI layer (we don't care)
4707 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
4708 unsigned int id
, u64 lun
)
4710 struct ata_port
*ap
= ata_shost_to_port(shost
);
4711 unsigned long flags
;
4714 if (!ap
->ops
->error_handler
)
4717 if (lun
!= SCAN_WILD_CARD
&& lun
)
4720 if (!sata_pmp_attached(ap
)) {
4721 if (channel
!= SCAN_WILD_CARD
&& channel
)
4725 if (id
!= SCAN_WILD_CARD
&& id
)
4730 spin_lock_irqsave(ap
->lock
, flags
);
4732 if (devno
== SCAN_WILD_CARD
) {
4733 struct ata_link
*link
;
4735 ata_for_each_link(link
, ap
, EDGE
) {
4736 struct ata_eh_info
*ehi
= &link
->eh_info
;
4737 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
4738 ehi
->action
|= ATA_EH_RESET
;
4741 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
4744 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
4745 ehi
->probe_mask
|= 1 << dev
->devno
;
4746 ehi
->action
|= ATA_EH_RESET
;
4752 ata_port_schedule_eh(ap
);
4753 spin_unlock_irqrestore(ap
->lock
, flags
);
4754 ata_port_wait_eh(ap
);
4756 spin_unlock_irqrestore(ap
->lock
, flags
);
4762 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4763 * @work: Pointer to ATA port to perform scsi_rescan_device()
4765 * After ATA pass thru (SAT) commands are executed successfully,
4766 * libata need to propagate the changes to SCSI layer.
4769 * Kernel thread context (may sleep).
4771 void ata_scsi_dev_rescan(struct work_struct
*work
)
4773 struct ata_port
*ap
=
4774 container_of(work
, struct ata_port
, scsi_rescan_task
);
4775 struct ata_link
*link
;
4776 struct ata_device
*dev
;
4777 unsigned long flags
;
4779 mutex_lock(&ap
->scsi_scan_mutex
);
4780 spin_lock_irqsave(ap
->lock
, flags
);
4782 ata_for_each_link(link
, ap
, EDGE
) {
4783 ata_for_each_dev(dev
, link
, ENABLED
) {
4784 struct scsi_device
*sdev
= dev
->sdev
;
4788 if (scsi_device_get(sdev
))
4791 spin_unlock_irqrestore(ap
->lock
, flags
);
4792 scsi_rescan_device(&(sdev
->sdev_gendev
));
4793 scsi_device_put(sdev
);
4794 spin_lock_irqsave(ap
->lock
, flags
);
4798 spin_unlock_irqrestore(ap
->lock
, flags
);
4799 mutex_unlock(&ap
->scsi_scan_mutex
);
4803 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4804 * @host: ATA host container for all SAS ports
4805 * @port_info: Information from low-level host driver
4806 * @shost: SCSI host that the scsi device is attached to
4809 * PCI/etc. bus probe sem.
4812 * ata_port pointer on success / NULL on failure.
4815 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4816 struct ata_port_info
*port_info
,
4817 struct Scsi_Host
*shost
)
4819 struct ata_port
*ap
;
4821 ap
= ata_port_alloc(host
);
4826 ap
->lock
= &host
->lock
;
4827 ap
->pio_mask
= port_info
->pio_mask
;
4828 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4829 ap
->udma_mask
= port_info
->udma_mask
;
4830 ap
->flags
|= port_info
->flags
;
4831 ap
->ops
= port_info
->port_ops
;
4832 ap
->cbl
= ATA_CBL_SATA
;
4836 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4839 * ata_sas_port_start - Set port up for dma.
4840 * @ap: Port to initialize
4842 * Called just after data structures for each port are
4845 * May be used as the port_start() entry in ata_port_operations.
4848 * Inherited from caller.
4850 int ata_sas_port_start(struct ata_port
*ap
)
4853 * the port is marked as frozen at allocation time, but if we don't
4854 * have new eh, we won't thaw it
4856 if (!ap
->ops
->error_handler
)
4857 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4860 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4863 * ata_port_stop - Undo ata_sas_port_start()
4864 * @ap: Port to shut down
4866 * May be used as the port_stop() entry in ata_port_operations.
4869 * Inherited from caller.
4872 void ata_sas_port_stop(struct ata_port
*ap
)
4875 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
4878 * ata_sas_async_probe - simply schedule probing and return
4879 * @ap: Port to probe
4881 * For batch scheduling of probe for sas attached ata devices, assumes
4882 * the port has already been through ata_sas_port_init()
4884 void ata_sas_async_probe(struct ata_port
*ap
)
4886 __ata_port_probe(ap
);
4888 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
4890 int ata_sas_sync_probe(struct ata_port
*ap
)
4892 return ata_port_probe(ap
);
4894 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
4898 * ata_sas_port_init - Initialize a SATA device
4899 * @ap: SATA port to initialize
4902 * PCI/etc. bus probe sem.
4905 * Zero on success, non-zero on error.
4908 int ata_sas_port_init(struct ata_port
*ap
)
4910 int rc
= ap
->ops
->port_start(ap
);
4914 ap
->print_id
= atomic_inc_return(&ata_print_id
);
4917 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
4920 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4921 * @ap: SATA port to destroy
4925 void ata_sas_port_destroy(struct ata_port
*ap
)
4927 if (ap
->ops
->port_stop
)
4928 ap
->ops
->port_stop(ap
);
4931 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
4934 * ata_sas_slave_configure - Default slave_config routine for libata devices
4935 * @sdev: SCSI device to configure
4936 * @ap: ATA port to which SCSI device is attached
4942 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
4944 ata_scsi_sdev_config(sdev
);
4945 ata_scsi_dev_config(sdev
, ap
->link
.device
);
4948 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
4951 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4952 * @cmd: SCSI command to be sent
4953 * @ap: ATA port to which the command is being sent
4956 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4960 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
4964 ata_scsi_dump_cdb(ap
, cmd
);
4966 if (likely(ata_dev_enabled(ap
->link
.device
)))
4967 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
4969 cmd
->result
= (DID_BAD_TARGET
<< 16);
4970 cmd
->scsi_done(cmd
);
4974 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);
4976 int ata_sas_allocate_tag(struct ata_port
*ap
)
4978 unsigned int max_queue
= ap
->host
->n_tags
;
4979 unsigned int i
, tag
;
4981 for (i
= 0, tag
= ap
->sas_last_tag
+ 1; i
< max_queue
; i
++, tag
++) {
4982 tag
= tag
< max_queue
? tag
: 0;
4984 /* the last tag is reserved for internal command. */
4985 if (tag
== ATA_TAG_INTERNAL
)
4988 if (!test_and_set_bit(tag
, &ap
->sas_tag_allocated
)) {
4989 ap
->sas_last_tag
= tag
;
4996 void ata_sas_free_tag(unsigned int tag
, struct ata_port
*ap
)
4998 clear_bit(tag
, &ap
->sas_tag_allocated
);