2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
60 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
62 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
64 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
65 const struct scsi_device
*scsidev
);
66 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
67 const struct scsi_device
*scsidev
);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
81 RW_RECOVERY_MPAGE_LEN
- 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
100 CONTROL_MPAGE_LEN
- 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names
[] = {
108 [ATA_LPM_UNKNOWN
] = "max_performance",
109 [ATA_LPM_MAX_POWER
] = "max_performance",
110 [ATA_LPM_MED_POWER
] = "medium_power",
111 [ATA_LPM_MIN_POWER
] = "min_power",
114 static ssize_t
ata_scsi_lpm_store(struct device
*dev
,
115 struct device_attribute
*attr
,
116 const char *buf
, size_t count
)
118 struct Scsi_Host
*shost
= class_to_shost(dev
);
119 struct ata_port
*ap
= ata_shost_to_port(shost
);
120 enum ata_lpm_policy policy
;
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy
= ATA_LPM_MAX_POWER
;
125 policy
< ARRAY_SIZE(ata_lpm_policy_names
); policy
++) {
126 const char *name
= ata_lpm_policy_names
[policy
];
128 if (strncmp(name
, buf
, strlen(name
)) == 0)
131 if (policy
== ARRAY_SIZE(ata_lpm_policy_names
))
134 spin_lock_irqsave(ap
->lock
, flags
);
135 ap
->target_lpm_policy
= policy
;
136 ata_port_schedule_eh(ap
);
137 spin_unlock_irqrestore(ap
->lock
, flags
);
142 static ssize_t
ata_scsi_lpm_show(struct device
*dev
,
143 struct device_attribute
*attr
, char *buf
)
145 struct Scsi_Host
*shost
= class_to_shost(dev
);
146 struct ata_port
*ap
= ata_shost_to_port(shost
);
148 if (ap
->target_lpm_policy
>= ARRAY_SIZE(ata_lpm_policy_names
))
151 return snprintf(buf
, PAGE_SIZE
, "%s\n",
152 ata_lpm_policy_names
[ap
->target_lpm_policy
]);
154 DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
155 ata_scsi_lpm_show
, ata_scsi_lpm_store
);
156 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy
);
158 static ssize_t
ata_scsi_park_show(struct device
*device
,
159 struct device_attribute
*attr
, char *buf
)
161 struct scsi_device
*sdev
= to_scsi_device(device
);
163 struct ata_link
*link
;
164 struct ata_device
*dev
;
165 unsigned long flags
, now
;
166 unsigned int uninitialized_var(msecs
);
169 ap
= ata_shost_to_port(sdev
->host
);
171 spin_lock_irqsave(ap
->lock
, flags
);
172 dev
= ata_scsi_find_dev(ap
, sdev
);
177 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
184 if (ap
->pflags
& ATA_PFLAG_EH_IN_PROGRESS
&&
185 link
->eh_context
.unloaded_mask
& (1 << dev
->devno
) &&
186 time_after(dev
->unpark_deadline
, now
))
187 msecs
= jiffies_to_msecs(dev
->unpark_deadline
- now
);
192 spin_unlock_irq(ap
->lock
);
194 return rc
? rc
: snprintf(buf
, 20, "%u\n", msecs
);
197 static ssize_t
ata_scsi_park_store(struct device
*device
,
198 struct device_attribute
*attr
,
199 const char *buf
, size_t len
)
201 struct scsi_device
*sdev
= to_scsi_device(device
);
203 struct ata_device
*dev
;
208 rc
= strict_strtol(buf
, 10, &input
);
209 if (rc
|| input
< -2)
211 if (input
> ATA_TMOUT_MAX_PARK
) {
213 input
= ATA_TMOUT_MAX_PARK
;
216 ap
= ata_shost_to_port(sdev
->host
);
218 spin_lock_irqsave(ap
->lock
, flags
);
219 dev
= ata_scsi_find_dev(ap
, sdev
);
220 if (unlikely(!dev
)) {
224 if (dev
->class != ATA_DEV_ATA
) {
230 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
235 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
236 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
237 ata_port_schedule_eh(ap
);
238 complete(&ap
->park_req_pending
);
242 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
245 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
250 spin_unlock_irqrestore(ap
->lock
, flags
);
252 return rc
? rc
: len
;
254 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
255 ata_scsi_park_show
, ata_scsi_park_store
);
256 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
258 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
260 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
262 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
266 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
267 const char *buf
, size_t count
)
269 struct Scsi_Host
*shost
= class_to_shost(dev
);
270 struct ata_port
*ap
= ata_shost_to_port(shost
);
271 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
272 return ap
->ops
->em_store(ap
, buf
, count
);
277 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
280 struct Scsi_Host
*shost
= class_to_shost(dev
);
281 struct ata_port
*ap
= ata_shost_to_port(shost
);
283 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
284 return ap
->ops
->em_show(ap
, buf
);
287 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
288 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
289 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
292 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
295 struct Scsi_Host
*shost
= class_to_shost(dev
);
296 struct ata_port
*ap
= ata_shost_to_port(shost
);
298 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
300 DEVICE_ATTR(em_message_type
, S_IRUGO
,
301 ata_scsi_em_message_type_show
, NULL
);
302 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
305 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
308 struct scsi_device
*sdev
= to_scsi_device(dev
);
309 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
310 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
312 if (ap
->ops
->sw_activity_show
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
313 return ap
->ops
->sw_activity_show(atadev
, buf
);
318 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
319 const char *buf
, size_t count
)
321 struct scsi_device
*sdev
= to_scsi_device(dev
);
322 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
323 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
324 enum sw_activity val
;
327 if (ap
->ops
->sw_activity_store
&& (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
328 val
= simple_strtoul(buf
, NULL
, 0);
330 case OFF
: case BLINK_ON
: case BLINK_OFF
:
331 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
340 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
341 ata_scsi_activity_store
);
342 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
344 struct device_attribute
*ata_common_sdev_attrs
[] = {
345 &dev_attr_unload_heads
,
348 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
350 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
)
352 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
353 /* "Invalid field in cbd" */
358 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
359 * @sdev: SCSI device for which BIOS geometry is to be determined
360 * @bdev: block device associated with @sdev
361 * @capacity: capacity of SCSI device
362 * @geom: location to which geometry will be output
364 * Generic bios head/sector/cylinder calculator
365 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
366 * mapping. Some situations may arise where the disk is not
367 * bootable if this is not used.
370 * Defined by the SCSI layer. We don't really care.
375 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
376 sector_t capacity
, int geom
[])
380 sector_div(capacity
, 255*63);
387 * ata_scsi_unlock_native_capacity - unlock native capacity
388 * @sdev: SCSI device to adjust device capacity for
390 * This function is called if a partition on @sdev extends beyond
391 * the end of the device. It requests EH to unlock HPA.
394 * Defined by the SCSI layer. Might sleep.
396 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
398 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
399 struct ata_device
*dev
;
402 spin_lock_irqsave(ap
->lock
, flags
);
404 dev
= ata_scsi_find_dev(ap
, sdev
);
405 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
406 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
407 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
408 ata_port_schedule_eh(ap
);
411 spin_unlock_irqrestore(ap
->lock
, flags
);
412 ata_port_wait_eh(ap
);
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
418 * @sdev: SCSI device to get identify data for
419 * @arg: User buffer area for identify data
422 * Defined by the SCSI layer. We don't really care.
425 * Zero on success, negative errno on error.
427 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
430 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
431 u16 __user
*dst
= arg
;
437 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
440 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
441 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
444 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
445 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
448 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
449 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
456 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
457 * @scsidev: Device to which we are issuing command
458 * @arg: User provided data for issuing command
461 * Defined by the SCSI layer. We don't really care.
464 * Zero on success, negative errno on error.
466 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
469 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
470 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
472 enum dma_data_direction data_dir
;
478 if (copy_from_user(args
, arg
, sizeof(args
)))
481 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
485 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
488 argsize
= ATA_SECT_SIZE
* args
[3];
489 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
490 if (argbuf
== NULL
) {
495 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
496 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
497 block count in sector count field */
498 data_dir
= DMA_FROM_DEVICE
;
500 scsi_cmd
[1] = (3 << 1); /* Non-data */
501 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
505 scsi_cmd
[0] = ATA_16
;
507 scsi_cmd
[4] = args
[2];
508 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
509 scsi_cmd
[6] = args
[3];
510 scsi_cmd
[8] = args
[1];
514 scsi_cmd
[6] = args
[1];
516 scsi_cmd
[14] = args
[0];
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
520 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
521 sensebuf
, (10*HZ
), 5, 0, NULL
);
523 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
524 u8
*desc
= sensebuf
+ 8;
525 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
527 /* If we set cc then ATA pass-through will cause a
528 * check condition even if no error. Filter that. */
529 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
530 struct scsi_sense_hdr sshdr
;
531 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
533 if (sshdr
.sense_key
== 0 &&
534 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
535 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
538 /* Send userspace a few ATA registers (same as drivers/ide) */
539 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
540 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
541 args
[0] = desc
[13]; /* status */
542 args
[1] = desc
[3]; /* error */
543 args
[2] = desc
[5]; /* sector count (0:7) */
544 if (copy_to_user(arg
, args
, sizeof(args
)))
556 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
565 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
566 * @scsidev: Device to which we are issuing command
567 * @arg: User provided data for issuing command
570 * Defined by the SCSI layer. We don't really care.
573 * Zero on success, negative errno on error.
575 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
578 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
579 u8 args
[7], *sensebuf
= NULL
;
585 if (copy_from_user(args
, arg
, sizeof(args
)))
588 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
592 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
593 scsi_cmd
[0] = ATA_16
;
594 scsi_cmd
[1] = (3 << 1); /* Non-data */
595 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
596 scsi_cmd
[4] = args
[1];
597 scsi_cmd
[6] = args
[2];
598 scsi_cmd
[8] = args
[3];
599 scsi_cmd
[10] = args
[4];
600 scsi_cmd
[12] = args
[5];
601 scsi_cmd
[13] = args
[6] & 0x4f;
602 scsi_cmd
[14] = args
[0];
604 /* Good values for timeout and retries? Values below
605 from scsi_ioctl_send_command() for default case... */
606 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
607 sensebuf
, (10*HZ
), 5, 0, NULL
);
609 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
610 u8
*desc
= sensebuf
+ 8;
611 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
613 /* If we set cc then ATA pass-through will cause a
614 * check condition even if no error. Filter that. */
615 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
616 struct scsi_sense_hdr sshdr
;
617 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
619 if (sshdr
.sense_key
== 0 &&
620 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
621 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
624 /* Send userspace ATA registers */
625 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
626 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
627 args
[0] = desc
[13]; /* status */
628 args
[1] = desc
[3]; /* error */
629 args
[2] = desc
[5]; /* sector count (0:7) */
630 args
[3] = desc
[7]; /* lbal */
631 args
[4] = desc
[9]; /* lbam */
632 args
[5] = desc
[11]; /* lbah */
633 args
[6] = desc
[12]; /* select */
634 if (copy_to_user(arg
, args
, sizeof(args
)))
649 static int ata_ioc32(struct ata_port
*ap
)
651 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
653 if (ap
->pflags
& ATA_PFLAG_PIO32
)
658 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
659 int cmd
, void __user
*arg
)
661 int val
= -EINVAL
, rc
= -EINVAL
;
665 case ATA_IOC_GET_IO32
:
666 spin_lock_irqsave(ap
->lock
, flags
);
668 spin_unlock_irqrestore(ap
->lock
, flags
);
669 if (copy_to_user(arg
, &val
, 1))
673 case ATA_IOC_SET_IO32
:
674 val
= (unsigned long) arg
;
676 spin_lock_irqsave(ap
->lock
, flags
);
677 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
679 ap
->pflags
|= ATA_PFLAG_PIO32
;
681 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
683 if (val
!= ata_ioc32(ap
))
686 spin_unlock_irqrestore(ap
->lock
, flags
);
689 case HDIO_GET_IDENTITY
:
690 return ata_get_identity(ap
, scsidev
, arg
);
693 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
695 return ata_cmd_ioctl(scsidev
, arg
);
697 case HDIO_DRIVE_TASK
:
698 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
700 return ata_task_ioctl(scsidev
, arg
);
709 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
711 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
713 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
716 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
719 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
720 * @dev: ATA device to which the new command is attached
721 * @cmd: SCSI command that originated this ATA command
723 * Obtain a reference to an unused ata_queued_cmd structure,
724 * which is the basic libata structure representing a single
725 * ATA command sent to the hardware.
727 * If a command was available, fill in the SCSI-specific
728 * portions of the structure with information on the
732 * spin_lock_irqsave(host lock)
735 * Command allocated, or %NULL if none available.
737 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
738 struct scsi_cmnd
*cmd
)
740 struct ata_queued_cmd
*qc
;
742 qc
= ata_qc_new_init(dev
);
745 qc
->scsidone
= cmd
->scsi_done
;
747 qc
->sg
= scsi_sglist(cmd
);
748 qc
->n_elem
= scsi_sg_count(cmd
);
750 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
757 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
759 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
761 qc
->extrabytes
= scmd
->request
->extra_len
;
762 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
766 * ata_dump_status - user friendly display of error info
767 * @id: id of the port in question
768 * @tf: ptr to filled out taskfile
770 * Decode and dump the ATA error/status registers for the user so
771 * that they have some idea what really happened at the non
772 * make-believe layer.
775 * inherited from caller
777 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
779 u8 stat
= tf
->command
, err
= tf
->feature
;
781 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
782 if (stat
& ATA_BUSY
) {
783 printk("Busy }\n"); /* Data is not valid in this case */
785 if (stat
& 0x40) printk("DriveReady ");
786 if (stat
& 0x20) printk("DeviceFault ");
787 if (stat
& 0x10) printk("SeekComplete ");
788 if (stat
& 0x08) printk("DataRequest ");
789 if (stat
& 0x04) printk("CorrectedError ");
790 if (stat
& 0x02) printk("Index ");
791 if (stat
& 0x01) printk("Error ");
795 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
796 if (err
& 0x04) printk("DriveStatusError ");
798 if (err
& 0x04) printk("BadCRC ");
799 else printk("Sector ");
801 if (err
& 0x40) printk("UncorrectableError ");
802 if (err
& 0x10) printk("SectorIdNotFound ");
803 if (err
& 0x02) printk("TrackZeroNotFound ");
804 if (err
& 0x01) printk("AddrMarkNotFound ");
811 * ata_to_sense_error - convert ATA error to SCSI error
812 * @id: ATA device number
813 * @drv_stat: value contained in ATA status register
814 * @drv_err: value contained in ATA error register
815 * @sk: the sense key we'll fill out
816 * @asc: the additional sense code we'll fill out
817 * @ascq: the additional sense code qualifier we'll fill out
818 * @verbose: be verbose
820 * Converts an ATA error into a SCSI error. Fill out pointers to
821 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
822 * format sense blocks.
825 * spin_lock_irqsave(host lock)
827 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
828 u8
*asc
, u8
*ascq
, int verbose
)
832 /* Based on the 3ware driver translation table */
833 static const unsigned char sense_table
[][4] = {
835 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
837 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
839 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
840 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
841 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
842 /* MC|ID|ABRT|TRK0|MARK */
843 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
845 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
846 /* Bad address mark */
847 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
849 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
851 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
852 /* Media change request */
853 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
855 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
857 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
859 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
860 /* BBD - block marked bad */
861 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
862 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
864 static const unsigned char stat_table
[][4] = {
865 /* Must be first because BUSY means no other bits valid */
866 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
867 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
868 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
869 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
870 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
874 * Is this an error we can process/parse
876 if (drv_stat
& ATA_BUSY
) {
877 drv_err
= 0; /* Ignore the err bits, they're invalid */
881 /* Look for drv_err */
882 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
883 /* Look for best matches first */
884 if ((sense_table
[i
][0] & drv_err
) ==
886 *sk
= sense_table
[i
][1];
887 *asc
= sense_table
[i
][2];
888 *ascq
= sense_table
[i
][3];
892 /* No immediate match */
894 printk(KERN_WARNING
"ata%u: no sense translation for "
895 "error 0x%02x\n", id
, drv_err
);
898 /* Fall back to interpreting status bits */
899 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
900 if (stat_table
[i
][0] & drv_stat
) {
901 *sk
= stat_table
[i
][1];
902 *asc
= stat_table
[i
][2];
903 *ascq
= stat_table
[i
][3];
907 /* No error? Undecoded? */
909 printk(KERN_WARNING
"ata%u: no sense translation for "
910 "status: 0x%02x\n", id
, drv_stat
);
912 /* We need a sensible error return here, which is tricky, and one
913 that won't cause people to do things like return a disk wrongly */
914 *sk
= ABORTED_COMMAND
;
920 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
921 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
922 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
927 * ata_gen_passthru_sense - Generate check condition sense block.
928 * @qc: Command that completed.
930 * This function is specific to the ATA descriptor format sense
931 * block specified for the ATA pass through commands. Regardless
932 * of whether the command errored or not, return a sense
933 * block. Copy all controller registers into the sense
934 * block. Clear sense key, ASC & ASCQ if there is no error.
939 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
941 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
942 struct ata_taskfile
*tf
= &qc
->result_tf
;
943 unsigned char *sb
= cmd
->sense_buffer
;
944 unsigned char *desc
= sb
+ 8;
945 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
947 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
949 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
952 * Use ata_to_sense_error() to map status register bits
953 * onto sense key, asc & ascq.
956 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
957 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
958 &sb
[1], &sb
[2], &sb
[3], verbose
);
963 * Sense data is current and format is descriptor.
969 /* set length of additional sense data */
974 * Copy registers into sense buffer.
977 desc
[3] = tf
->feature
; /* == error reg */
982 desc
[12] = tf
->device
;
983 desc
[13] = tf
->command
; /* == status reg */
986 * Fill in Extend bit, and the high order bytes
989 if (tf
->flags
& ATA_TFLAG_LBA48
) {
991 desc
[4] = tf
->hob_nsect
;
992 desc
[6] = tf
->hob_lbal
;
993 desc
[8] = tf
->hob_lbam
;
994 desc
[10] = tf
->hob_lbah
;
999 * ata_gen_ata_sense - generate a SCSI fixed sense block
1000 * @qc: Command that we are erroring out
1002 * Generate sense block for a failed ATA command @qc. Descriptor
1003 * format is used to accommodate LBA48 block address.
1008 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1010 struct ata_device
*dev
= qc
->dev
;
1011 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1012 struct ata_taskfile
*tf
= &qc
->result_tf
;
1013 unsigned char *sb
= cmd
->sense_buffer
;
1014 unsigned char *desc
= sb
+ 8;
1015 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1018 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1020 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1022 /* sense data is current and format is descriptor */
1025 /* Use ata_to_sense_error() to map status register bits
1026 * onto sense key, asc & ascq.
1029 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1030 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1031 &sb
[1], &sb
[2], &sb
[3], verbose
);
1035 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1037 /* information sense data descriptor */
1042 desc
[2] |= 0x80; /* valid */
1043 desc
[6] = block
>> 40;
1044 desc
[7] = block
>> 32;
1045 desc
[8] = block
>> 24;
1046 desc
[9] = block
>> 16;
1047 desc
[10] = block
>> 8;
1051 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1053 sdev
->use_10_for_rw
= 1;
1054 sdev
->use_10_for_ms
= 1;
1055 sdev
->no_report_opcodes
= 1;
1056 sdev
->no_write_same
= 1;
1058 /* Schedule policy is determined by ->qc_defer() callback and
1059 * it needs to see every deferred qc. Set dev_blocked to 1 to
1060 * prevent SCSI midlayer from automatically deferring
1063 sdev
->max_device_blocked
= 1;
1067 * atapi_drain_needed - Check whether data transfer may overflow
1068 * @rq: request to be checked
1070 * ATAPI commands which transfer variable length data to host
1071 * might overflow due to application error or hardare bug. This
1072 * function checks whether overflow should be drained and ignored
1079 * 1 if ; otherwise, 0.
1081 static int atapi_drain_needed(struct request
*rq
)
1083 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1086 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_WRITE
))
1089 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1092 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1093 struct ata_device
*dev
)
1095 struct request_queue
*q
= sdev
->request_queue
;
1097 if (!ata_id_has_unload(dev
->id
))
1098 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1100 /* configure max sectors */
1101 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1103 if (dev
->class == ATA_DEV_ATAPI
) {
1106 sdev
->sector_size
= ATA_SECT_SIZE
;
1108 /* set DMA padding */
1109 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1111 /* configure draining */
1112 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1114 ata_dev_err(dev
, "drain buffer allocation failed\n");
1118 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1120 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1121 sdev
->manage_start_stop
= 1;
1125 * ata_pio_sectors() expects buffer for each sector to not cross
1126 * page boundary. Enforce it by requiring buffers to be sector
1127 * aligned, which works iff sector_size is not larger than
1128 * PAGE_SIZE. ATAPI devices also need the alignment as
1129 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1131 if (sdev
->sector_size
> PAGE_SIZE
)
1133 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1136 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1138 if (dev
->flags
& ATA_DFLAG_AN
)
1139 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1141 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1144 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1145 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1146 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
1149 blk_queue_flush_queueable(q
, false);
1156 * ata_scsi_slave_config - Set SCSI device attributes
1157 * @sdev: SCSI device to examine
1159 * This is called before we actually start reading
1160 * and writing to the device, to configure certain
1161 * SCSI mid-layer behaviors.
1164 * Defined by SCSI layer. We don't really care.
1167 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1169 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1170 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1173 ata_scsi_sdev_config(sdev
);
1176 rc
= ata_scsi_dev_config(sdev
, dev
);
1182 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1183 * @sdev: SCSI device to be destroyed
1185 * @sdev is about to be destroyed for hot/warm unplugging. If
1186 * this unplugging was initiated by libata as indicated by NULL
1187 * dev->sdev, this function doesn't have to do anything.
1188 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1189 * Clear dev->sdev, schedule the device for ATA detach and invoke
1193 * Defined by SCSI layer. We don't really care.
1195 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1197 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1198 struct request_queue
*q
= sdev
->request_queue
;
1199 unsigned long flags
;
1200 struct ata_device
*dev
;
1202 if (!ap
->ops
->error_handler
)
1205 spin_lock_irqsave(ap
->lock
, flags
);
1206 dev
= __ata_scsi_find_dev(ap
, sdev
);
1207 if (dev
&& dev
->sdev
) {
1208 /* SCSI device already in CANCEL state, no need to offline it */
1210 dev
->flags
|= ATA_DFLAG_DETACH
;
1211 ata_port_schedule_eh(ap
);
1213 spin_unlock_irqrestore(ap
->lock
, flags
);
1215 kfree(q
->dma_drain_buffer
);
1216 q
->dma_drain_buffer
= NULL
;
1217 q
->dma_drain_size
= 0;
1221 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1222 * @ap: ATA port to which the device change the queue depth
1223 * @sdev: SCSI device to configure queue depth for
1224 * @queue_depth: new queue depth
1225 * @reason: calling context
1227 * libsas and libata have different approaches for associating a sdev to
1231 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1232 int queue_depth
, int reason
)
1234 struct ata_device
*dev
;
1235 unsigned long flags
;
1237 if (reason
!= SCSI_QDEPTH_DEFAULT
)
1240 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1241 return sdev
->queue_depth
;
1243 dev
= ata_scsi_find_dev(ap
, sdev
);
1244 if (!dev
|| !ata_dev_enabled(dev
))
1245 return sdev
->queue_depth
;
1248 spin_lock_irqsave(ap
->lock
, flags
);
1249 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1250 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1251 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1254 spin_unlock_irqrestore(ap
->lock
, flags
);
1256 /* limit and apply queue depth */
1257 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1258 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1259 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1261 if (sdev
->queue_depth
== queue_depth
)
1264 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1269 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1270 * @sdev: SCSI device to configure queue depth for
1271 * @queue_depth: new queue depth
1272 * @reason: calling context
1274 * This is libata standard hostt->change_queue_depth callback.
1275 * SCSI will call into this callback when user tries to set queue
1279 * SCSI layer (we don't care)
1282 * Newly configured queue depth.
1284 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
,
1287 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1289 return __ata_change_queue_depth(ap
, sdev
, queue_depth
, reason
);
1293 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1294 * @qc: Storage for translated ATA taskfile
1296 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1297 * (to start). Perhaps these commands should be preceded by
1298 * CHECK POWER MODE to see what power mode the device is already in.
1299 * [See SAT revision 5 at www.t10.org]
1302 * spin_lock_irqsave(host lock)
1305 * Zero on success, non-zero on error.
1307 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1309 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1310 struct ata_taskfile
*tf
= &qc
->tf
;
1311 const u8
*cdb
= scmd
->cmnd
;
1313 if (scmd
->cmd_len
< 5)
1316 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1317 tf
->protocol
= ATA_PROT_NODATA
;
1319 ; /* ignore IMMED bit, violates sat-r05 */
1322 goto invalid_fld
; /* LOEJ bit set not supported */
1323 if (((cdb
[4] >> 4) & 0xf) != 0)
1324 goto invalid_fld
; /* power conditions not supported */
1327 tf
->nsect
= 1; /* 1 sector, lba=0 */
1329 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1330 tf
->flags
|= ATA_TFLAG_LBA
;
1335 tf
->device
|= ATA_LBA
;
1338 tf
->lbal
= 0x1; /* sect */
1339 tf
->lbam
= 0x0; /* cyl low */
1340 tf
->lbah
= 0x0; /* cyl high */
1343 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1345 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1346 * or S5) causing some drives to spin up and down again.
1348 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1349 system_state
== SYSTEM_POWER_OFF
)
1352 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1353 system_entering_hibernation())
1356 /* Issue ATA STANDBY IMMEDIATE command */
1357 tf
->command
= ATA_CMD_STANDBYNOW1
;
1361 * Standby and Idle condition timers could be implemented but that
1362 * would require libata to implement the Power condition mode page
1363 * and allow the user to change it. Changing mode pages requires
1364 * MODE SELECT to be implemented.
1370 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1371 /* "Invalid field in cbd" */
1374 scmd
->result
= SAM_STAT_GOOD
;
1380 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1381 * @qc: Storage for translated ATA taskfile
1383 * Sets up an ATA taskfile to issue FLUSH CACHE or
1387 * spin_lock_irqsave(host lock)
1390 * Zero on success, non-zero on error.
1392 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1394 struct ata_taskfile
*tf
= &qc
->tf
;
1396 tf
->flags
|= ATA_TFLAG_DEVICE
;
1397 tf
->protocol
= ATA_PROT_NODATA
;
1399 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1400 tf
->command
= ATA_CMD_FLUSH_EXT
;
1402 tf
->command
= ATA_CMD_FLUSH
;
1404 /* flush is critical for IO integrity, consider it an IO command */
1405 qc
->flags
|= ATA_QCFLAG_IO
;
1411 * scsi_6_lba_len - Get LBA and transfer length
1412 * @cdb: SCSI command to translate
1414 * Calculate LBA and transfer length for 6-byte commands.
1418 * @plen: the transfer length
1420 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1425 VPRINTK("six-byte command\n");
1427 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1428 lba
|= ((u64
)cdb
[2]) << 8;
1429 lba
|= ((u64
)cdb
[3]);
1438 * scsi_10_lba_len - Get LBA and transfer length
1439 * @cdb: SCSI command to translate
1441 * Calculate LBA and transfer length for 10-byte commands.
1445 * @plen: the transfer length
1447 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1452 VPRINTK("ten-byte command\n");
1454 lba
|= ((u64
)cdb
[2]) << 24;
1455 lba
|= ((u64
)cdb
[3]) << 16;
1456 lba
|= ((u64
)cdb
[4]) << 8;
1457 lba
|= ((u64
)cdb
[5]);
1459 len
|= ((u32
)cdb
[7]) << 8;
1460 len
|= ((u32
)cdb
[8]);
1467 * scsi_16_lba_len - Get LBA and transfer length
1468 * @cdb: SCSI command to translate
1470 * Calculate LBA and transfer length for 16-byte commands.
1474 * @plen: the transfer length
1476 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1481 VPRINTK("sixteen-byte command\n");
1483 lba
|= ((u64
)cdb
[2]) << 56;
1484 lba
|= ((u64
)cdb
[3]) << 48;
1485 lba
|= ((u64
)cdb
[4]) << 40;
1486 lba
|= ((u64
)cdb
[5]) << 32;
1487 lba
|= ((u64
)cdb
[6]) << 24;
1488 lba
|= ((u64
)cdb
[7]) << 16;
1489 lba
|= ((u64
)cdb
[8]) << 8;
1490 lba
|= ((u64
)cdb
[9]);
1492 len
|= ((u32
)cdb
[10]) << 24;
1493 len
|= ((u32
)cdb
[11]) << 16;
1494 len
|= ((u32
)cdb
[12]) << 8;
1495 len
|= ((u32
)cdb
[13]);
1502 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1503 * @qc: Storage for translated ATA taskfile
1505 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1508 * spin_lock_irqsave(host lock)
1511 * Zero on success, non-zero on error.
1513 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1515 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1516 struct ata_taskfile
*tf
= &qc
->tf
;
1517 struct ata_device
*dev
= qc
->dev
;
1518 u64 dev_sectors
= qc
->dev
->n_sectors
;
1519 const u8
*cdb
= scmd
->cmnd
;
1523 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1524 tf
->protocol
= ATA_PROT_NODATA
;
1526 if (cdb
[0] == VERIFY
) {
1527 if (scmd
->cmd_len
< 10)
1529 scsi_10_lba_len(cdb
, &block
, &n_block
);
1530 } else if (cdb
[0] == VERIFY_16
) {
1531 if (scmd
->cmd_len
< 16)
1533 scsi_16_lba_len(cdb
, &block
, &n_block
);
1539 if (block
>= dev_sectors
)
1541 if ((block
+ n_block
) > dev_sectors
)
1544 if (dev
->flags
& ATA_DFLAG_LBA
) {
1545 tf
->flags
|= ATA_TFLAG_LBA
;
1547 if (lba_28_ok(block
, n_block
)) {
1549 tf
->command
= ATA_CMD_VERIFY
;
1550 tf
->device
|= (block
>> 24) & 0xf;
1551 } else if (lba_48_ok(block
, n_block
)) {
1552 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1556 tf
->flags
|= ATA_TFLAG_LBA48
;
1557 tf
->command
= ATA_CMD_VERIFY_EXT
;
1559 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1561 tf
->hob_lbah
= (block
>> 40) & 0xff;
1562 tf
->hob_lbam
= (block
>> 32) & 0xff;
1563 tf
->hob_lbal
= (block
>> 24) & 0xff;
1565 /* request too large even for LBA48 */
1568 tf
->nsect
= n_block
& 0xff;
1570 tf
->lbah
= (block
>> 16) & 0xff;
1571 tf
->lbam
= (block
>> 8) & 0xff;
1572 tf
->lbal
= block
& 0xff;
1574 tf
->device
|= ATA_LBA
;
1577 u32 sect
, head
, cyl
, track
;
1579 if (!lba_28_ok(block
, n_block
))
1582 /* Convert LBA to CHS */
1583 track
= (u32
)block
/ dev
->sectors
;
1584 cyl
= track
/ dev
->heads
;
1585 head
= track
% dev
->heads
;
1586 sect
= (u32
)block
% dev
->sectors
+ 1;
1588 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1589 (u32
)block
, track
, cyl
, head
, sect
);
1591 /* Check whether the converted CHS can fit.
1595 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1598 tf
->command
= ATA_CMD_VERIFY
;
1599 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1602 tf
->lbah
= cyl
>> 8;
1609 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1610 /* "Invalid field in cbd" */
1614 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1615 /* "Logical Block Address out of range" */
1619 scmd
->result
= SAM_STAT_GOOD
;
1624 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1625 * @qc: Storage for translated ATA taskfile
1627 * Converts any of six SCSI read/write commands into the
1628 * ATA counterpart, including starting sector (LBA),
1629 * sector count, and taking into account the device's LBA48
1632 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1633 * %WRITE_16 are currently supported.
1636 * spin_lock_irqsave(host lock)
1639 * Zero on success, non-zero on error.
1641 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1643 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1644 const u8
*cdb
= scmd
->cmnd
;
1645 unsigned int tf_flags
= 0;
1650 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1651 tf_flags
|= ATA_TFLAG_WRITE
;
1653 /* Calculate the SCSI LBA, transfer length and FUA. */
1657 if (unlikely(scmd
->cmd_len
< 10))
1659 scsi_10_lba_len(cdb
, &block
, &n_block
);
1660 if (cdb
[1] & (1 << 3))
1661 tf_flags
|= ATA_TFLAG_FUA
;
1665 if (unlikely(scmd
->cmd_len
< 6))
1667 scsi_6_lba_len(cdb
, &block
, &n_block
);
1669 /* for 6-byte r/w commands, transfer length 0
1670 * means 256 blocks of data, not 0 block.
1677 if (unlikely(scmd
->cmd_len
< 16))
1679 scsi_16_lba_len(cdb
, &block
, &n_block
);
1680 if (cdb
[1] & (1 << 3))
1681 tf_flags
|= ATA_TFLAG_FUA
;
1684 DPRINTK("no-byte command\n");
1688 /* Check and compose ATA command */
1690 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1691 * length 0 means transfer 0 block of data.
1692 * However, for ATA R/W commands, sector count 0 means
1693 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1695 * WARNING: one or two older ATA drives treat 0 as 0...
1699 qc
->flags
|= ATA_QCFLAG_IO
;
1700 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1702 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1704 if (likely(rc
== 0))
1709 /* treat all other errors as -EINVAL, fall through */
1711 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1712 /* "Invalid field in cbd" */
1716 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1717 /* "Logical Block Address out of range" */
1721 scmd
->result
= SAM_STAT_GOOD
;
1725 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1727 struct ata_port
*ap
= qc
->ap
;
1728 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1729 u8
*cdb
= cmd
->cmnd
;
1730 int need_sense
= (qc
->err_mask
!= 0);
1732 /* For ATA pass thru (SAT) commands, generate a sense block if
1733 * user mandated it or if there's an error. Note that if we
1734 * generate because the user forced us to, a check condition
1735 * is generated and the ATA register values are returned
1736 * whether the command completed successfully or not. If there
1737 * was no error, SK, ASC and ASCQ will all be zero.
1739 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1740 ((cdb
[2] & 0x20) || need_sense
)) {
1741 ata_gen_passthru_sense(qc
);
1744 cmd
->result
= SAM_STAT_GOOD
;
1746 /* TODO: decide which descriptor format to use
1747 * for 48b LBA devices and call that here
1748 * instead of the fixed desc, which is only
1749 * good for smaller LBA (and maybe CHS?)
1752 ata_gen_ata_sense(qc
);
1756 if (need_sense
&& !ap
->ops
->error_handler
)
1757 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1765 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1766 * @dev: ATA device to which the command is addressed
1767 * @cmd: SCSI command to execute
1768 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1770 * Our ->queuecommand() function has decided that the SCSI
1771 * command issued can be directly translated into an ATA
1772 * command, rather than handled internally.
1774 * This function sets up an ata_queued_cmd structure for the
1775 * SCSI command, and sends that ata_queued_cmd to the hardware.
1777 * The xlat_func argument (actor) returns 0 if ready to execute
1778 * ATA command, else 1 to finish translation. If 1 is returned
1779 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1780 * to be set reflecting an error condition or clean (early)
1784 * spin_lock_irqsave(host lock)
1787 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1788 * needs to be deferred.
1790 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1791 ata_xlat_func_t xlat_func
)
1793 struct ata_port
*ap
= dev
->link
->ap
;
1794 struct ata_queued_cmd
*qc
;
1799 qc
= ata_scsi_qc_new(dev
, cmd
);
1803 /* data is present; dma-map it */
1804 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1805 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1806 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1807 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1811 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1813 qc
->dma_dir
= cmd
->sc_data_direction
;
1816 qc
->complete_fn
= ata_scsi_qc_complete
;
1821 if (ap
->ops
->qc_defer
) {
1822 if ((rc
= ap
->ops
->qc_defer(qc
)))
1826 /* select device, send command to hardware */
1834 cmd
->scsi_done(cmd
);
1835 DPRINTK("EXIT - early finish (good or error)\n");
1840 cmd
->result
= (DID_ERROR
<< 16);
1841 cmd
->scsi_done(cmd
);
1843 DPRINTK("EXIT - internal\n");
1848 DPRINTK("EXIT - defer\n");
1849 if (rc
== ATA_DEFER_LINK
)
1850 return SCSI_MLQUEUE_DEVICE_BUSY
;
1852 return SCSI_MLQUEUE_HOST_BUSY
;
1856 * ata_scsi_rbuf_get - Map response buffer.
1857 * @cmd: SCSI command containing buffer to be mapped.
1858 * @flags: unsigned long variable to store irq enable status
1859 * @copy_in: copy in from user buffer
1861 * Prepare buffer for simulated SCSI commands.
1864 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1867 * Pointer to response buffer.
1869 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1870 unsigned long *flags
)
1872 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1874 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1876 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1877 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1878 return ata_scsi_rbuf
;
1882 * ata_scsi_rbuf_put - Unmap response buffer.
1883 * @cmd: SCSI command containing buffer to be unmapped.
1884 * @copy_out: copy out result
1885 * @flags: @flags passed to ata_scsi_rbuf_get()
1887 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1888 * @copy_back is true.
1891 * Unlocks ata_scsi_rbuf_lock.
1893 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1894 unsigned long *flags
)
1897 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1898 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1899 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1903 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @actor: Callback hook for desired SCSI command simulator
1907 * Takes care of the hard work of simulating a SCSI command...
1908 * Mapping the response buffer, calling the command's handler,
1909 * and handling the handler's return value. This return value
1910 * indicates whether the handler wishes the SCSI command to be
1911 * completed successfully (0), or not (in which case cmd->result
1912 * and sense buffer are assumed to be set).
1915 * spin_lock_irqsave(host lock)
1917 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1918 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1922 struct scsi_cmnd
*cmd
= args
->cmd
;
1923 unsigned long flags
;
1925 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1926 rc
= actor(args
, rbuf
);
1927 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1930 cmd
->result
= SAM_STAT_GOOD
;
1935 * ata_scsiop_inq_std - Simulate INQUIRY command
1936 * @args: device IDENTIFY data / SCSI command of interest.
1937 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1939 * Returns standard device identification data associated
1940 * with non-VPD INQUIRY command output.
1943 * spin_lock_irqsave(host lock)
1945 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1947 const u8 versions
[] = {
1948 0x60, /* SAM-3 (no version claimed) */
1951 0x20, /* SBC-2 (no version claimed) */
1954 0x60 /* SPC-3 (no version claimed) */
1959 0x5, /* claim SPC-3 version compatibility */
1966 /* set scsi removeable (RMB) bit per ata bit */
1967 if (ata_id_removeable(args
->id
))
1970 memcpy(rbuf
, hdr
, sizeof(hdr
));
1971 memcpy(&rbuf
[8], "ATA ", 8);
1972 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1973 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1975 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1976 memcpy(&rbuf
[32], "n/a ", 4);
1978 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1984 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1985 * @args: device IDENTIFY data / SCSI command of interest.
1986 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1988 * Returns list of inquiry VPD pages available.
1991 * spin_lock_irqsave(host lock)
1993 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
1995 const u8 pages
[] = {
1996 0x00, /* page 0x00, this page */
1997 0x80, /* page 0x80, unit serial no page */
1998 0x83, /* page 0x83, device ident page */
1999 0x89, /* page 0x89, ata info page */
2000 0xb0, /* page 0xb0, block limits page */
2001 0xb1, /* page 0xb1, block device characteristics page */
2002 0xb2, /* page 0xb2, thin provisioning page */
2005 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
2006 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
2011 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2012 * @args: device IDENTIFY data / SCSI command of interest.
2013 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2015 * Returns ATA device serial number.
2018 * spin_lock_irqsave(host lock)
2020 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2024 0x80, /* this page code */
2026 ATA_ID_SERNO_LEN
, /* page len */
2029 memcpy(rbuf
, hdr
, sizeof(hdr
));
2030 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2031 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2036 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2037 * @args: device IDENTIFY data / SCSI command of interest.
2038 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2040 * Yields two logical unit device identification designators:
2041 * - vendor specific ASCII containing the ATA serial number
2042 * - SAT defined "t10 vendor id based" containing ASCII vendor
2043 * name ("ATA "), model and serial numbers.
2046 * spin_lock_irqsave(host lock)
2048 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2050 const int sat_model_serial_desc_len
= 68;
2053 rbuf
[1] = 0x83; /* this page code */
2056 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2058 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2060 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2061 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2062 num
+= ATA_ID_SERNO_LEN
;
2064 /* SAT defined lu model and serial numbers descriptor */
2065 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2068 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2070 memcpy(rbuf
+ num
, "ATA ", 8);
2072 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2074 num
+= ATA_ID_PROD_LEN
;
2075 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2077 num
+= ATA_ID_SERNO_LEN
;
2079 if (ata_id_has_wwn(args
->id
)) {
2080 /* SAT defined lu world wide name */
2081 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2084 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2086 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2087 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2088 num
+= ATA_ID_WWN_LEN
;
2090 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2095 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2096 * @args: device IDENTIFY data / SCSI command of interest.
2097 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2099 * Yields SAT-specified ATA VPD page.
2102 * spin_lock_irqsave(host lock)
2104 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2106 struct ata_taskfile tf
;
2108 memset(&tf
, 0, sizeof(tf
));
2110 rbuf
[1] = 0x89; /* our page code */
2111 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2112 rbuf
[3] = (0x238 & 0xff);
2114 memcpy(&rbuf
[8], "linux ", 8);
2115 memcpy(&rbuf
[16], "libata ", 16);
2116 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2117 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
2119 /* we don't store the ATA device signature, so we fake it */
2121 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2125 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2126 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2128 rbuf
[56] = ATA_CMD_ID_ATA
;
2130 memcpy(&rbuf
[60], &args
->id
[0], 512);
2134 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2139 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2142 * Optimal transfer length granularity.
2144 * This is always one physical block, but for disks with a smaller
2145 * logical than physical sector size we need to figure out what the
2148 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2149 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2152 * Optimal unmap granularity.
2154 * The ATA spec doesn't even know about a granularity or alignment
2155 * for the TRIM command. We can leave away most of the unmap related
2156 * VPD page entries, but we have specifify a granularity to signal
2157 * that we support some form of unmap - in thise case via WRITE SAME
2158 * with the unmap bit set.
2160 if (ata_id_has_trim(args
->id
)) {
2161 put_unaligned_be64(65535 * 512 / 8, &rbuf
[36]);
2162 put_unaligned_be32(1, &rbuf
[28]);
2168 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2170 int form_factor
= ata_id_form_factor(args
->id
);
2171 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2175 rbuf
[4] = media_rotation_rate
>> 8;
2176 rbuf
[5] = media_rotation_rate
;
2177 rbuf
[7] = form_factor
;
2182 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2184 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2187 rbuf
[5] = 1 << 6; /* TPWS */
2193 * ata_scsiop_noop - Command handler that simply returns success.
2194 * @args: device IDENTIFY data / SCSI command of interest.
2195 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2197 * No operation. Simply returns success to caller, to indicate
2198 * that the caller should successfully complete this SCSI command.
2201 * spin_lock_irqsave(host lock)
2203 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2210 * modecpy - Prepare response for MODE SENSE
2211 * @dest: output buffer
2212 * @src: data being copied
2213 * @n: length of mode page
2214 * @changeable: whether changeable parameters are requested
2216 * Generate a generic MODE SENSE page for either current or changeable
2222 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2225 memcpy(dest
, src
, 2);
2226 memset(dest
+ 2, 0, n
- 2);
2228 memcpy(dest
, src
, n
);
2233 * ata_msense_caching - Simulate MODE SENSE caching info page
2234 * @id: device IDENTIFY data
2235 * @buf: output buffer
2236 * @changeable: whether changeable parameters are requested
2238 * Generate a caching info page, which conditionally indicates
2239 * write caching to the SCSI layer, depending on device
2245 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2247 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2248 if (changeable
|| ata_id_wcache_enabled(id
))
2249 buf
[2] |= (1 << 2); /* write cache enable */
2250 if (!changeable
&& !ata_id_rahead_enabled(id
))
2251 buf
[12] |= (1 << 5); /* disable read ahead */
2252 return sizeof(def_cache_mpage
);
2256 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2257 * @buf: output buffer
2258 * @changeable: whether changeable parameters are requested
2260 * Generate a generic MODE SENSE control mode page.
2265 static unsigned int ata_msense_ctl_mode(u8
*buf
, bool changeable
)
2267 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2268 return sizeof(def_control_mpage
);
2272 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2273 * @buf: output buffer
2274 * @changeable: whether changeable parameters are requested
2276 * Generate a generic MODE SENSE r/w error recovery page.
2281 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2283 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2285 return sizeof(def_rw_recovery_mpage
);
2289 * We can turn this into a real blacklist if it's needed, for now just
2290 * blacklist any Maxtor BANC1G10 revision firmware
2292 static int ata_dev_supports_fua(u16
*id
)
2294 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2298 if (!ata_id_has_fua(id
))
2301 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2302 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2304 if (strcmp(model
, "Maxtor"))
2306 if (strcmp(fw
, "BANC1G10"))
2309 return 0; /* blacklisted */
2313 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2314 * @args: device IDENTIFY data / SCSI command of interest.
2315 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2317 * Simulate MODE SENSE commands. Assume this is invoked for direct
2318 * access devices (e.g. disks) only. There should be no block
2319 * descriptor for other device types.
2322 * spin_lock_irqsave(host lock)
2324 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2326 struct ata_device
*dev
= args
->dev
;
2327 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2328 const u8 sat_blk_desc
[] = {
2329 0, 0, 0, 0, /* number of blocks: sat unspecified */
2331 0, 0x2, 0x0 /* block length: 512 bytes */
2334 unsigned int ebd
, page_control
, six_byte
;
2339 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2340 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2342 * LLBA bit in msense(10) ignored (compliant)
2345 page_control
= scsicmd
[2] >> 6;
2346 switch (page_control
) {
2347 case 0: /* current */
2348 case 1: /* changeable */
2349 case 2: /* defaults */
2350 break; /* supported */
2352 goto saving_not_supp
;
2358 p
+= 4 + (ebd
? 8 : 0);
2360 p
+= 8 + (ebd
? 8 : 0);
2362 pg
= scsicmd
[2] & 0x3f;
2365 * No mode subpages supported (yet) but asking for _all_
2366 * subpages may be valid
2368 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2372 case RW_RECOVERY_MPAGE
:
2373 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2377 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2381 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2385 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2386 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2387 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2390 default: /* invalid page code */
2395 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2396 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2400 rbuf
[0] = p
- rbuf
- 1;
2403 rbuf
[3] = sizeof(sat_blk_desc
);
2404 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2407 unsigned int output_len
= p
- rbuf
- 2;
2409 rbuf
[0] = output_len
>> 8;
2410 rbuf
[1] = output_len
;
2413 rbuf
[7] = sizeof(sat_blk_desc
);
2414 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2420 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2421 /* "Invalid field in cbd" */
2425 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2426 /* "Saving parameters not supported" */
2431 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2432 * @args: device IDENTIFY data / SCSI command of interest.
2433 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2435 * Simulate READ CAPACITY commands.
2440 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2442 struct ata_device
*dev
= args
->dev
;
2443 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2444 u32 sector_size
; /* physical sector size in bytes */
2448 sector_size
= ata_id_logical_sector_size(dev
->id
);
2449 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2450 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2454 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2455 if (last_lba
>= 0xffffffffULL
)
2456 last_lba
= 0xffffffff;
2458 /* sector count, 32-bit */
2459 rbuf
[0] = last_lba
>> (8 * 3);
2460 rbuf
[1] = last_lba
>> (8 * 2);
2461 rbuf
[2] = last_lba
>> (8 * 1);
2465 rbuf
[4] = sector_size
>> (8 * 3);
2466 rbuf
[5] = sector_size
>> (8 * 2);
2467 rbuf
[6] = sector_size
>> (8 * 1);
2468 rbuf
[7] = sector_size
;
2470 /* sector count, 64-bit */
2471 rbuf
[0] = last_lba
>> (8 * 7);
2472 rbuf
[1] = last_lba
>> (8 * 6);
2473 rbuf
[2] = last_lba
>> (8 * 5);
2474 rbuf
[3] = last_lba
>> (8 * 4);
2475 rbuf
[4] = last_lba
>> (8 * 3);
2476 rbuf
[5] = last_lba
>> (8 * 2);
2477 rbuf
[6] = last_lba
>> (8 * 1);
2481 rbuf
[ 8] = sector_size
>> (8 * 3);
2482 rbuf
[ 9] = sector_size
>> (8 * 2);
2483 rbuf
[10] = sector_size
>> (8 * 1);
2484 rbuf
[11] = sector_size
;
2487 rbuf
[13] = log2_per_phys
;
2488 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2489 rbuf
[15] = lowest_aligned
;
2491 if (ata_id_has_trim(args
->id
)) {
2492 rbuf
[14] |= 0x80; /* TPE */
2494 if (ata_id_has_zero_after_trim(args
->id
))
2495 rbuf
[14] |= 0x40; /* TPRZ */
2503 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2504 * @args: device IDENTIFY data / SCSI command of interest.
2505 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2507 * Simulate REPORT LUNS command.
2510 * spin_lock_irqsave(host lock)
2512 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2515 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2520 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2522 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2523 /* FIXME: not quite right; we don't want the
2524 * translation of taskfile registers into
2525 * a sense descriptors, since that's only
2526 * correct for ATA, not ATAPI
2528 ata_gen_passthru_sense(qc
);
2531 qc
->scsidone(qc
->scsicmd
);
2535 /* is it pointless to prefer PIO for "safety reasons"? */
2536 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2538 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2541 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2543 struct ata_port
*ap
= qc
->ap
;
2544 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2546 DPRINTK("ATAPI request sense\n");
2548 /* FIXME: is this needed? */
2549 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2551 #ifdef CONFIG_ATA_SFF
2552 if (ap
->ops
->sff_tf_read
)
2553 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2556 /* fill these in, for the case where they are -not- overwritten */
2557 cmd
->sense_buffer
[0] = 0x70;
2558 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2562 /* setup sg table and init transfer direction */
2563 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2564 ata_sg_init(qc
, &qc
->sgent
, 1);
2565 qc
->dma_dir
= DMA_FROM_DEVICE
;
2567 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2568 qc
->cdb
[0] = REQUEST_SENSE
;
2569 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2571 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2572 qc
->tf
.command
= ATA_CMD_PACKET
;
2574 if (ata_pio_use_silly(ap
)) {
2575 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2576 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2578 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2579 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2582 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2584 qc
->complete_fn
= atapi_sense_complete
;
2591 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2593 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2594 unsigned int err_mask
= qc
->err_mask
;
2596 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2598 /* handle completion from new EH */
2599 if (unlikely(qc
->ap
->ops
->error_handler
&&
2600 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2602 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2603 /* FIXME: not quite right; we don't want the
2604 * translation of taskfile registers into a
2605 * sense descriptors, since that's only
2606 * correct for ATA, not ATAPI
2608 ata_gen_passthru_sense(qc
);
2611 /* SCSI EH automatically locks door if sdev->locked is
2612 * set. Sometimes door lock request continues to
2613 * fail, for example, when no media is present. This
2614 * creates a loop - SCSI EH issues door lock which
2615 * fails and gets invoked again to acquire sense data
2616 * for the failed command.
2618 * If door lock fails, always clear sdev->locked to
2619 * avoid this infinite loop.
2621 * This may happen before SCSI scan is complete. Make
2622 * sure qc->dev->sdev isn't NULL before dereferencing.
2624 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2625 qc
->dev
->sdev
->locked
= 0;
2627 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2633 /* successful completion or old EH failure path */
2634 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2635 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2636 atapi_request_sense(qc
);
2638 } else if (unlikely(err_mask
)) {
2639 /* FIXME: not quite right; we don't want the
2640 * translation of taskfile registers into
2641 * a sense descriptors, since that's only
2642 * correct for ATA, not ATAPI
2644 ata_gen_passthru_sense(qc
);
2646 u8
*scsicmd
= cmd
->cmnd
;
2648 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2649 unsigned long flags
;
2652 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2654 /* ATAPI devices typically report zero for their SCSI version,
2655 * and sometimes deviate from the spec WRT response data
2656 * format. If SCSI version is reported as zero like normal,
2657 * then we make the following fixups: 1) Fake MMC-5 version,
2658 * to indicate to the Linux scsi midlayer this is a modern
2659 * device. 2) Ensure response data format / ATAPI information
2660 * are always correct.
2667 ata_scsi_rbuf_put(cmd
, true, &flags
);
2670 cmd
->result
= SAM_STAT_GOOD
;
2677 * atapi_xlat - Initialize PACKET taskfile
2678 * @qc: command structure to be initialized
2681 * spin_lock_irqsave(host lock)
2684 * Zero on success, non-zero on failure.
2686 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2688 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2689 struct ata_device
*dev
= qc
->dev
;
2690 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2691 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2692 unsigned int nbytes
;
2694 memset(qc
->cdb
, 0, dev
->cdb_len
);
2695 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2697 qc
->complete_fn
= atapi_qc_complete
;
2699 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2700 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2701 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2702 DPRINTK("direction: write\n");
2705 qc
->tf
.command
= ATA_CMD_PACKET
;
2706 ata_qc_set_pc_nbytes(qc
);
2708 /* check whether ATAPI DMA is safe */
2709 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2712 /* Some controller variants snoop this value for Packet
2713 * transfers to do state machine and FIFO management. Thus we
2714 * want to set it properly, and for DMA where it is
2715 * effectively meaningless.
2717 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2719 /* Most ATAPI devices which honor transfer chunk size don't
2720 * behave according to the spec when odd chunk size which
2721 * matches the transfer length is specified. If the number of
2722 * bytes to transfer is 2n+1. According to the spec, what
2723 * should happen is to indicate that 2n+1 is going to be
2724 * transferred and transfer 2n+2 bytes where the last byte is
2727 * In practice, this doesn't happen. ATAPI devices first
2728 * indicate and transfer 2n bytes and then indicate and
2729 * transfer 2 bytes where the last byte is padding.
2731 * This inconsistency confuses several controllers which
2732 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2733 * These controllers use actual number of transferred bytes to
2734 * update DMA poitner and transfer of 4n+2 bytes make those
2735 * controller push DMA pointer by 4n+4 bytes because SATA data
2736 * FISes are aligned to 4 bytes. This causes data corruption
2737 * and buffer overrun.
2739 * Always setting nbytes to even number solves this problem
2740 * because then ATAPI devices don't have to split data at 2n
2746 qc
->tf
.lbam
= (nbytes
& 0xFF);
2747 qc
->tf
.lbah
= (nbytes
>> 8);
2750 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2752 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2755 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2756 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2758 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2759 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2760 /* some SATA bridges need us to indicate data xfer direction */
2761 qc
->tf
.feature
|= ATAPI_DMADIR
;
2765 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2766 as ATAPI tape drives don't get this right otherwise */
2770 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2772 if (!sata_pmp_attached(ap
)) {
2773 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2774 return &ap
->link
.device
[devno
];
2776 if (likely(devno
< ap
->nr_pmp_links
))
2777 return &ap
->pmp_link
[devno
].device
[0];
2783 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2784 const struct scsi_device
*scsidev
)
2788 /* skip commands not addressed to targets we simulate */
2789 if (!sata_pmp_attached(ap
)) {
2790 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2792 devno
= scsidev
->id
;
2794 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2796 devno
= scsidev
->channel
;
2799 return ata_find_dev(ap
, devno
);
2803 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2804 * @ap: ATA port to which the device is attached
2805 * @scsidev: SCSI device from which we derive the ATA device
2807 * Given various information provided in struct scsi_cmnd,
2808 * map that onto an ATA bus, and using that mapping
2809 * determine which ata_device is associated with the
2810 * SCSI command to be sent.
2813 * spin_lock_irqsave(host lock)
2816 * Associated ATA device, or %NULL if not found.
2818 static struct ata_device
*
2819 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2821 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2823 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2830 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2831 * @byte1: Byte 1 from pass-thru CDB.
2834 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2837 ata_scsi_map_proto(u8 byte1
)
2839 switch((byte1
& 0x1e) >> 1) {
2840 case 3: /* Non-data */
2841 return ATA_PROT_NODATA
;
2844 case 10: /* UDMA Data-in */
2845 case 11: /* UDMA Data-Out */
2846 return ATA_PROT_DMA
;
2848 case 4: /* PIO Data-in */
2849 case 5: /* PIO Data-out */
2850 return ATA_PROT_PIO
;
2852 case 0: /* Hard Reset */
2854 case 8: /* Device Diagnostic */
2855 case 9: /* Device Reset */
2856 case 7: /* DMA Queued */
2857 case 12: /* FPDMA */
2858 case 15: /* Return Response Info */
2859 default: /* Reserved */
2863 return ATA_PROT_UNKNOWN
;
2867 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2868 * @qc: command structure to be initialized
2870 * Handles either 12 or 16-byte versions of the CDB.
2873 * Zero on success, non-zero on failure.
2875 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2877 struct ata_taskfile
*tf
= &(qc
->tf
);
2878 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2879 struct ata_device
*dev
= qc
->dev
;
2880 const u8
*cdb
= scmd
->cmnd
;
2882 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2886 * 12 and 16 byte CDBs use different offsets to
2887 * provide the various register values.
2889 if (cdb
[0] == ATA_16
) {
2891 * 16-byte CDB - may contain extended commands.
2893 * If that is the case, copy the upper byte register values.
2895 if (cdb
[1] & 0x01) {
2896 tf
->hob_feature
= cdb
[3];
2897 tf
->hob_nsect
= cdb
[5];
2898 tf
->hob_lbal
= cdb
[7];
2899 tf
->hob_lbam
= cdb
[9];
2900 tf
->hob_lbah
= cdb
[11];
2901 tf
->flags
|= ATA_TFLAG_LBA48
;
2903 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2906 * Always copy low byte, device and command registers.
2908 tf
->feature
= cdb
[4];
2913 tf
->device
= cdb
[13];
2914 tf
->command
= cdb
[14];
2917 * 12-byte CDB - incapable of extended commands.
2919 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2921 tf
->feature
= cdb
[3];
2926 tf
->device
= cdb
[8];
2927 tf
->command
= cdb
[9];
2930 /* enforce correct master/slave bit */
2931 tf
->device
= dev
->devno
?
2932 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2934 switch (tf
->command
) {
2935 /* READ/WRITE LONG use a non-standard sect_size */
2936 case ATA_CMD_READ_LONG
:
2937 case ATA_CMD_READ_LONG_ONCE
:
2938 case ATA_CMD_WRITE_LONG
:
2939 case ATA_CMD_WRITE_LONG_ONCE
:
2940 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2942 qc
->sect_size
= scsi_bufflen(scmd
);
2945 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2946 case ATA_CMD_CFA_WRITE_NE
:
2947 case ATA_CMD_CFA_TRANS_SECT
:
2948 case ATA_CMD_CFA_WRITE_MULT_NE
:
2949 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2951 case ATA_CMD_READ_EXT
:
2952 case ATA_CMD_READ_QUEUED
:
2953 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2954 case ATA_CMD_FPDMA_READ
:
2955 case ATA_CMD_READ_MULTI
:
2956 case ATA_CMD_READ_MULTI_EXT
:
2957 case ATA_CMD_PIO_READ
:
2958 case ATA_CMD_PIO_READ_EXT
:
2959 case ATA_CMD_READ_STREAM_DMA_EXT
:
2960 case ATA_CMD_READ_STREAM_EXT
:
2961 case ATA_CMD_VERIFY
:
2962 case ATA_CMD_VERIFY_EXT
:
2964 case ATA_CMD_WRITE_EXT
:
2965 case ATA_CMD_WRITE_FUA_EXT
:
2966 case ATA_CMD_WRITE_QUEUED
:
2967 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
2968 case ATA_CMD_FPDMA_WRITE
:
2969 case ATA_CMD_WRITE_MULTI
:
2970 case ATA_CMD_WRITE_MULTI_EXT
:
2971 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
2972 case ATA_CMD_PIO_WRITE
:
2973 case ATA_CMD_PIO_WRITE_EXT
:
2974 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
2975 case ATA_CMD_WRITE_STREAM_EXT
:
2976 qc
->sect_size
= scmd
->device
->sector_size
;
2979 /* Everything else uses 512 byte "sectors" */
2981 qc
->sect_size
= ATA_SECT_SIZE
;
2985 * Set flags so that all registers will be written, pass on
2986 * write indication (used for PIO/DMA setup), result TF is
2987 * copied back and we don't whine too much about its failure.
2989 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2990 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2991 tf
->flags
|= ATA_TFLAG_WRITE
;
2993 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2996 * Set transfer length.
2998 * TODO: find out if we need to do more here to
2999 * cover scatter/gather case.
3001 ata_qc_set_pc_nbytes(qc
);
3003 /* We may not issue DMA commands if no DMA mode is set */
3004 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
3007 /* sanity check for pio multi commands */
3008 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
3011 if (is_multi_taskfile(tf
)) {
3012 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3014 /* compare the passed through multi_count
3015 * with the cached multi_count of libata
3017 if (multi_count
!= dev
->multi_count
)
3018 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3023 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3024 * SET_FEATURES - XFER MODE must be preceded/succeeded
3025 * by an update to hardware-specific registers for each
3026 * controller (i.e. the reason for ->set_piomode(),
3027 * ->set_dmamode(), and ->post_set_mode() hooks).
3029 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3030 tf
->feature
== SETFEATURES_XFER
)
3034 * Filter TPM commands by default. These provide an
3035 * essentially uncontrolled encrypted "back door" between
3036 * applications and the disk. Set libata.allow_tpm=1 if you
3037 * have a real reason for wanting to use them. This ensures
3038 * that installed software cannot easily mess stuff up without
3039 * user intent. DVR type users will probably ship with this enabled
3040 * for movie content management.
3042 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3043 * for this and should do in future but that it is not sufficient as
3044 * DCS is an optional feature set. Thus we also do the software filter
3045 * so that we comply with the TC consortium stated goal that the user
3046 * can turn off TC features of their system.
3048 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
3054 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3055 /* "Invalid field in cdb" */
3059 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3061 struct ata_taskfile
*tf
= &qc
->tf
;
3062 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3063 struct ata_device
*dev
= qc
->dev
;
3064 const u8
*cdb
= scmd
->cmnd
;
3070 /* we may not issue DMA commands if no DMA mode is set */
3071 if (unlikely(!dev
->dma_mode
))
3074 if (unlikely(scmd
->cmd_len
< 16))
3076 scsi_16_lba_len(cdb
, &block
, &n_block
);
3078 /* for now we only support WRITE SAME with the unmap bit set */
3079 if (unlikely(!(cdb
[1] & 0x8)))
3083 * WRITE SAME always has a sector sized buffer as payload, this
3084 * should never be a multiple entry S/G list.
3086 if (!scsi_sg_count(scmd
))
3089 buf
= page_address(sg_page(scsi_sglist(scmd
)));
3090 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
3092 tf
->protocol
= ATA_PROT_DMA
;
3093 tf
->hob_feature
= 0;
3094 tf
->feature
= ATA_DSM_TRIM
;
3095 tf
->hob_nsect
= (size
/ 512) >> 8;
3096 tf
->nsect
= size
/ 512;
3097 tf
->command
= ATA_CMD_DSM
;
3098 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3101 ata_qc_set_pc_nbytes(qc
);
3106 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3107 /* "Invalid field in cdb" */
3112 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3113 * @qc: Storage for translated ATA taskfile
3114 * @buf: input buffer
3115 * @len: number of valid bytes in the input buffer
3117 * Prepare a taskfile to modify caching information for the device.
3122 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3123 const u8
*buf
, int len
)
3125 struct ata_taskfile
*tf
= &qc
->tf
;
3126 struct ata_device
*dev
= qc
->dev
;
3127 char mpage
[CACHE_MPAGE_LEN
];
3131 * The first two bytes of def_cache_mpage are a header, so offsets
3132 * in mpage are off by 2 compared to buf. Same for len.
3135 if (len
!= CACHE_MPAGE_LEN
- 2)
3138 wce
= buf
[0] & (1 << 2);
3141 * Check that read-only bits are not modified.
3143 ata_msense_caching(dev
->id
, mpage
, false);
3144 mpage
[2] &= ~(1 << 2);
3146 if (memcmp(mpage
+ 2, buf
, CACHE_MPAGE_LEN
- 2) != 0)
3149 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3150 tf
->protocol
= ATA_PROT_NODATA
;
3152 tf
->command
= ATA_CMD_SET_FEATURES
;
3153 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3158 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3159 * @qc: Storage for translated ATA taskfile
3161 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3162 * Assume this is invoked for direct access devices (e.g. disks) only.
3163 * There should be no block descriptor for other device types.
3166 * spin_lock_irqsave(host lock)
3168 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3170 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3171 const u8
*cdb
= scmd
->cmnd
;
3174 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3179 six_byte
= (cdb
[0] == MODE_SELECT
);
3181 if (scmd
->cmd_len
< 5)
3187 if (scmd
->cmd_len
< 9)
3190 len
= (cdb
[7] << 8) + cdb
[8];
3194 /* We only support PF=1, SP=0. */
3195 if ((cdb
[1] & 0x11) != 0x10)
3198 /* Test early for possible overrun. */
3199 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
3200 goto invalid_param_len
;
3202 p
= page_address(sg_page(scsi_sglist(scmd
)));
3204 /* Move past header and block descriptors. */
3206 goto invalid_param_len
;
3211 bd_len
= (p
[6] << 8) + p
[7];
3216 goto invalid_param_len
;
3217 if (bd_len
!= 0 && bd_len
!= 8)
3225 /* Parse both possible formats for the mode page headers. */
3229 goto invalid_param_len
;
3232 pg_len
= (p
[2] << 8) | p
[3];
3237 goto invalid_param_len
;
3246 * No mode subpages supported (yet) but asking for _all_
3247 * subpages may be valid
3249 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
3252 goto invalid_param_len
;
3256 if (ata_mselect_caching(qc
, p
, pg_len
) < 0)
3260 default: /* invalid page code */
3265 * Only one page has changeable data, so we only support setting one
3274 /* "Invalid field in CDB" */
3275 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
3279 /* "Invalid field in parameter list" */
3280 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
3284 /* "Parameter list length error" */
3285 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3289 scmd
->result
= SAM_STAT_GOOD
;
3294 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3296 * @cmd: SCSI command opcode to consider
3298 * Look up the SCSI command given, and determine whether the
3299 * SCSI command is to be translated or simulated.
3302 * Pointer to translation function if possible, %NULL if not.
3305 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3315 return ata_scsi_rw_xlat
;
3318 return ata_scsi_write_same_xlat
;
3320 case SYNCHRONIZE_CACHE
:
3321 if (ata_try_flush_cache(dev
))
3322 return ata_scsi_flush_xlat
;
3327 return ata_scsi_verify_xlat
;
3331 return ata_scsi_pass_thru
;
3334 case MODE_SELECT_10
:
3335 return ata_scsi_mode_select_xlat
;
3339 return ata_scsi_start_stop_xlat
;
3346 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3347 * @ap: ATA port to which the command was being sent
3348 * @cmd: SCSI command to dump
3350 * Prints the contents of a SCSI command via printk().
3353 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3354 struct scsi_cmnd
*cmd
)
3357 struct scsi_device
*scsidev
= cmd
->device
;
3358 u8
*scsicmd
= cmd
->cmnd
;
3360 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3362 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3363 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3364 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3369 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3370 struct ata_device
*dev
)
3372 u8 scsi_op
= scmd
->cmnd
[0];
3373 ata_xlat_func_t xlat_func
;
3376 if (dev
->class == ATA_DEV_ATA
) {
3377 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3380 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3382 if (unlikely(!scmd
->cmd_len
))
3386 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3387 /* relay SCSI command to ATAPI device */
3388 int len
= COMMAND_SIZE(scsi_op
);
3389 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3392 xlat_func
= atapi_xlat
;
3394 /* ATA_16 passthru, treat as an ATA command */
3395 if (unlikely(scmd
->cmd_len
> 16))
3398 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3403 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
3405 ata_scsi_simulate(dev
, scmd
);
3410 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3411 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3412 scmd
->result
= DID_ERROR
<< 16;
3413 scmd
->scsi_done(scmd
);
3418 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3419 * @shost: SCSI host of command to be sent
3420 * @cmd: SCSI command to be sent
3422 * In some cases, this function translates SCSI commands into
3423 * ATA taskfiles, and queues the taskfiles to be sent to
3424 * hardware. In other cases, this function simulates a
3425 * SCSI device by evaluating and responding to certain
3426 * SCSI commands. This creates the overall effect of
3427 * ATA and ATAPI devices appearing as SCSI devices.
3433 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3436 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
3438 struct ata_port
*ap
;
3439 struct ata_device
*dev
;
3440 struct scsi_device
*scsidev
= cmd
->device
;
3442 unsigned long irq_flags
;
3444 ap
= ata_shost_to_port(shost
);
3446 spin_lock_irqsave(ap
->lock
, irq_flags
);
3448 ata_scsi_dump_cdb(ap
, cmd
);
3450 dev
= ata_scsi_find_dev(ap
, scsidev
);
3452 rc
= __ata_scsi_queuecmd(cmd
, dev
);
3454 cmd
->result
= (DID_BAD_TARGET
<< 16);
3455 cmd
->scsi_done(cmd
);
3458 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
3464 * ata_scsi_simulate - simulate SCSI command on ATA device
3465 * @dev: the target device
3466 * @cmd: SCSI command being sent to device.
3468 * Interprets and directly executes a select list of SCSI commands
3469 * that can be handled internally.
3472 * spin_lock_irqsave(host lock)
3475 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
3477 struct ata_scsi_args args
;
3478 const u8
*scsicmd
= cmd
->cmnd
;
3484 args
.done
= cmd
->scsi_done
;
3486 switch(scsicmd
[0]) {
3487 /* TODO: worth improving? */
3489 ata_scsi_invalid_field(cmd
);
3493 if (scsicmd
[1] & 2) /* is CmdDt set? */
3494 ata_scsi_invalid_field(cmd
);
3495 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3496 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3497 else switch (scsicmd
[2]) {
3499 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3502 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3505 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3508 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3511 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3514 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3517 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
3520 ata_scsi_invalid_field(cmd
);
3527 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3531 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3534 case SERVICE_ACTION_IN
:
3535 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3536 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3538 ata_scsi_invalid_field(cmd
);
3542 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3546 ata_scsi_set_sense(cmd
, 0, 0, 0);
3547 cmd
->result
= (DRIVER_SENSE
<< 24);
3548 cmd
->scsi_done(cmd
);
3551 /* if we reach this, then writeback caching is disabled,
3552 * turning this into a no-op.
3554 case SYNCHRONIZE_CACHE
:
3557 /* no-op's, complete with success */
3561 case TEST_UNIT_READY
:
3562 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3565 case SEND_DIAGNOSTIC
:
3566 tmp8
= scsicmd
[1] & ~(1 << 3);
3567 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3568 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3570 ata_scsi_invalid_field(cmd
);
3573 /* all other commands */
3575 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3576 /* "Invalid command operation code" */
3577 cmd
->scsi_done(cmd
);
3582 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3586 for (i
= 0; i
< host
->n_ports
; i
++) {
3587 struct ata_port
*ap
= host
->ports
[i
];
3588 struct Scsi_Host
*shost
;
3591 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3595 shost
->eh_noresume
= 1;
3596 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3597 ap
->scsi_host
= shost
;
3599 shost
->transportt
= ata_scsi_transport_template
;
3600 shost
->unique_id
= ap
->print_id
;
3603 shost
->max_channel
= 1;
3604 shost
->max_cmd_len
= 16;
3606 /* Schedule policy is determined by ->qc_defer()
3607 * callback and it needs to see every deferred qc.
3608 * Set host_blocked to 1 to prevent SCSI midlayer from
3609 * automatically deferring requests.
3611 shost
->max_host_blocked
= 1;
3613 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
3614 &ap
->tdev
, ap
->host
->dev
);
3622 scsi_host_put(host
->ports
[i
]->scsi_host
);
3625 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3627 scsi_remove_host(shost
);
3628 scsi_host_put(shost
);
3633 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3636 struct ata_device
*last_failed_dev
= NULL
;
3637 struct ata_link
*link
;
3638 struct ata_device
*dev
;
3641 ata_for_each_link(link
, ap
, EDGE
) {
3642 ata_for_each_dev(dev
, link
, ENABLED
) {
3643 struct scsi_device
*sdev
;
3644 int channel
= 0, id
= 0;
3649 if (ata_is_host_link(link
))
3652 channel
= link
->pmp
;
3654 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3656 if (!IS_ERR(sdev
)) {
3658 scsi_device_put(sdev
);
3666 /* If we scanned while EH was in progress or allocation
3667 * failure occurred, scan would have failed silently. Check
3668 * whether all devices are attached.
3670 ata_for_each_link(link
, ap
, EDGE
) {
3671 ata_for_each_dev(dev
, link
, ENABLED
) {
3680 /* we're missing some SCSI devices */
3682 /* If caller requested synchrnous scan && we've made
3683 * any progress, sleep briefly and repeat.
3685 if (dev
!= last_failed_dev
) {
3687 last_failed_dev
= dev
;
3691 /* We might be failing to detect boot device, give it
3692 * a few more chances.
3700 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3703 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
3704 round_jiffies_relative(HZ
));
3708 * ata_scsi_offline_dev - offline attached SCSI device
3709 * @dev: ATA device to offline attached SCSI device for
3711 * This function is called from ata_eh_hotplug() and responsible
3712 * for taking the SCSI device attached to @dev offline. This
3713 * function is called with host lock which protects dev->sdev
3717 * spin_lock_irqsave(host lock)
3720 * 1 if attached SCSI device exists, 0 otherwise.
3722 int ata_scsi_offline_dev(struct ata_device
*dev
)
3725 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3732 * ata_scsi_remove_dev - remove attached SCSI device
3733 * @dev: ATA device to remove attached SCSI device for
3735 * This function is called from ata_eh_scsi_hotplug() and
3736 * responsible for removing the SCSI device attached to @dev.
3739 * Kernel thread context (may sleep).
3741 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3743 struct ata_port
*ap
= dev
->link
->ap
;
3744 struct scsi_device
*sdev
;
3745 unsigned long flags
;
3747 /* Alas, we need to grab scan_mutex to ensure SCSI device
3748 * state doesn't change underneath us and thus
3749 * scsi_device_get() always succeeds. The mutex locking can
3750 * be removed if there is __scsi_device_get() interface which
3751 * increments reference counts regardless of device state.
3753 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3754 spin_lock_irqsave(ap
->lock
, flags
);
3756 ata_acpi_unbind(dev
);
3758 /* clearing dev->sdev is protected by host lock */
3763 /* If user initiated unplug races with us, sdev can go
3764 * away underneath us after the host lock and
3765 * scan_mutex are released. Hold onto it.
3767 if (scsi_device_get(sdev
) == 0) {
3768 /* The following ensures the attached sdev is
3769 * offline on return from ata_scsi_offline_dev()
3770 * regardless it wins or loses the race
3771 * against this function.
3773 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3780 spin_unlock_irqrestore(ap
->lock
, flags
);
3781 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3784 ata_dev_info(dev
, "detaching (SCSI %s)\n",
3785 dev_name(&sdev
->sdev_gendev
));
3787 scsi_remove_device(sdev
);
3788 scsi_device_put(sdev
);
3792 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3794 struct ata_port
*ap
= link
->ap
;
3795 struct ata_device
*dev
;
3797 ata_for_each_dev(dev
, link
, ALL
) {
3798 unsigned long flags
;
3800 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3803 spin_lock_irqsave(ap
->lock
, flags
);
3804 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3805 spin_unlock_irqrestore(ap
->lock
, flags
);
3807 ata_scsi_remove_dev(dev
);
3812 * ata_scsi_media_change_notify - send media change event
3813 * @dev: Pointer to the disk device with media change event
3815 * Tell the block layer to send a media change notification
3819 * spin_lock_irqsave(host lock)
3821 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3824 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3829 * ata_scsi_hotplug - SCSI part of hotplug
3830 * @work: Pointer to ATA port to perform SCSI hotplug on
3832 * Perform SCSI part of hotplug. It's executed from a separate
3833 * workqueue after EH completes. This is necessary because SCSI
3834 * hot plugging requires working EH and hot unplugging is
3835 * synchronized with hot plugging with a mutex.
3838 * Kernel thread context (may sleep).
3840 void ata_scsi_hotplug(struct work_struct
*work
)
3842 struct ata_port
*ap
=
3843 container_of(work
, struct ata_port
, hotplug_task
.work
);
3846 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3847 DPRINTK("ENTER/EXIT - unloading\n");
3852 mutex_lock(&ap
->scsi_scan_mutex
);
3854 /* Unplug detached devices. We cannot use link iterator here
3855 * because PMP links have to be scanned even if PMP is
3856 * currently not attached. Iterate manually.
3858 ata_scsi_handle_link_detach(&ap
->link
);
3860 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3861 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3863 /* scan for new ones */
3864 ata_scsi_scan_host(ap
, 0);
3866 mutex_unlock(&ap
->scsi_scan_mutex
);
3871 * ata_scsi_user_scan - indication for user-initiated bus scan
3872 * @shost: SCSI host to scan
3873 * @channel: Channel to scan
3877 * This function is called when user explicitly requests bus
3878 * scan. Set probe pending flag and invoke EH.
3881 * SCSI layer (we don't care)
3886 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3887 unsigned int id
, unsigned int lun
)
3889 struct ata_port
*ap
= ata_shost_to_port(shost
);
3890 unsigned long flags
;
3893 if (!ap
->ops
->error_handler
)
3896 if (lun
!= SCAN_WILD_CARD
&& lun
)
3899 if (!sata_pmp_attached(ap
)) {
3900 if (channel
!= SCAN_WILD_CARD
&& channel
)
3904 if (id
!= SCAN_WILD_CARD
&& id
)
3909 spin_lock_irqsave(ap
->lock
, flags
);
3911 if (devno
== SCAN_WILD_CARD
) {
3912 struct ata_link
*link
;
3914 ata_for_each_link(link
, ap
, EDGE
) {
3915 struct ata_eh_info
*ehi
= &link
->eh_info
;
3916 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3917 ehi
->action
|= ATA_EH_RESET
;
3920 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3923 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3924 ehi
->probe_mask
|= 1 << dev
->devno
;
3925 ehi
->action
|= ATA_EH_RESET
;
3931 ata_port_schedule_eh(ap
);
3932 spin_unlock_irqrestore(ap
->lock
, flags
);
3933 ata_port_wait_eh(ap
);
3935 spin_unlock_irqrestore(ap
->lock
, flags
);
3941 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3942 * @work: Pointer to ATA port to perform scsi_rescan_device()
3944 * After ATA pass thru (SAT) commands are executed successfully,
3945 * libata need to propagate the changes to SCSI layer.
3948 * Kernel thread context (may sleep).
3950 void ata_scsi_dev_rescan(struct work_struct
*work
)
3952 struct ata_port
*ap
=
3953 container_of(work
, struct ata_port
, scsi_rescan_task
);
3954 struct ata_link
*link
;
3955 struct ata_device
*dev
;
3956 unsigned long flags
;
3958 mutex_lock(&ap
->scsi_scan_mutex
);
3959 spin_lock_irqsave(ap
->lock
, flags
);
3961 ata_for_each_link(link
, ap
, EDGE
) {
3962 ata_for_each_dev(dev
, link
, ENABLED
) {
3963 struct scsi_device
*sdev
= dev
->sdev
;
3967 if (scsi_device_get(sdev
))
3970 spin_unlock_irqrestore(ap
->lock
, flags
);
3971 scsi_rescan_device(&(sdev
->sdev_gendev
));
3972 scsi_device_put(sdev
);
3973 spin_lock_irqsave(ap
->lock
, flags
);
3977 spin_unlock_irqrestore(ap
->lock
, flags
);
3978 mutex_unlock(&ap
->scsi_scan_mutex
);
3982 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3983 * @host: ATA host container for all SAS ports
3984 * @port_info: Information from low-level host driver
3985 * @shost: SCSI host that the scsi device is attached to
3988 * PCI/etc. bus probe sem.
3991 * ata_port pointer on success / NULL on failure.
3994 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3995 struct ata_port_info
*port_info
,
3996 struct Scsi_Host
*shost
)
3998 struct ata_port
*ap
;
4000 ap
= ata_port_alloc(host
);
4005 ap
->lock
= &host
->lock
;
4006 ap
->pio_mask
= port_info
->pio_mask
;
4007 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4008 ap
->udma_mask
= port_info
->udma_mask
;
4009 ap
->flags
|= port_info
->flags
;
4010 ap
->ops
= port_info
->port_ops
;
4011 ap
->cbl
= ATA_CBL_SATA
;
4015 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4018 * ata_sas_port_start - Set port up for dma.
4019 * @ap: Port to initialize
4021 * Called just after data structures for each port are
4024 * May be used as the port_start() entry in ata_port_operations.
4027 * Inherited from caller.
4029 int ata_sas_port_start(struct ata_port
*ap
)
4032 * the port is marked as frozen at allocation time, but if we don't
4033 * have new eh, we won't thaw it
4035 if (!ap
->ops
->error_handler
)
4036 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4039 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4042 * ata_port_stop - Undo ata_sas_port_start()
4043 * @ap: Port to shut down
4045 * May be used as the port_stop() entry in ata_port_operations.
4048 * Inherited from caller.
4051 void ata_sas_port_stop(struct ata_port
*ap
)
4054 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
4057 * ata_sas_async_probe - simply schedule probing and return
4058 * @ap: Port to probe
4060 * For batch scheduling of probe for sas attached ata devices, assumes
4061 * the port has already been through ata_sas_port_init()
4063 void ata_sas_async_probe(struct ata_port
*ap
)
4065 __ata_port_probe(ap
);
4067 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
4069 int ata_sas_sync_probe(struct ata_port
*ap
)
4071 return ata_port_probe(ap
);
4073 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
4077 * ata_sas_port_init - Initialize a SATA device
4078 * @ap: SATA port to initialize
4081 * PCI/etc. bus probe sem.
4084 * Zero on success, non-zero on error.
4087 int ata_sas_port_init(struct ata_port
*ap
)
4089 int rc
= ap
->ops
->port_start(ap
);
4093 ap
->print_id
= atomic_inc_return(&ata_print_id
);
4096 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
4099 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4100 * @ap: SATA port to destroy
4104 void ata_sas_port_destroy(struct ata_port
*ap
)
4106 if (ap
->ops
->port_stop
)
4107 ap
->ops
->port_stop(ap
);
4110 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
4113 * ata_sas_slave_configure - Default slave_config routine for libata devices
4114 * @sdev: SCSI device to configure
4115 * @ap: ATA port to which SCSI device is attached
4121 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
4123 ata_scsi_sdev_config(sdev
);
4124 ata_scsi_dev_config(sdev
, ap
->link
.device
);
4127 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
4130 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4131 * @cmd: SCSI command to be sent
4132 * @ap: ATA port to which the command is being sent
4135 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4139 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
4143 ata_scsi_dump_cdb(ap
, cmd
);
4145 if (likely(ata_dev_enabled(ap
->link
.device
)))
4146 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
4148 cmd
->result
= (DID_BAD_TARGET
<< 16);
4149 cmd
->scsi_done(cmd
);
4153 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);