2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock
);
60 static u8 ata_scsi_rbuf
[ATA_SCSI_RBUF_SIZE
];
62 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
64 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
65 const struct scsi_device
*scsidev
);
66 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
67 const struct scsi_device
*scsidev
);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
81 RW_RECOVERY_MPAGE_LEN
- 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
100 CONTROL_MPAGE_LEN
- 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names
[] = {
108 [ATA_LPM_UNKNOWN
] = "max_performance",
109 [ATA_LPM_MAX_POWER
] = "max_performance",
110 [ATA_LPM_MED_POWER
] = "medium_power",
111 [ATA_LPM_MIN_POWER
] = "min_power",
114 static ssize_t
ata_scsi_lpm_store(struct device
*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
= kstrtol(buf
, 10, &input
);
213 if (input
> ATA_TMOUT_MAX_PARK
) {
215 input
= ATA_TMOUT_MAX_PARK
;
218 ap
= ata_shost_to_port(sdev
->host
);
220 spin_lock_irqsave(ap
->lock
, flags
);
221 dev
= ata_scsi_find_dev(ap
, sdev
);
222 if (unlikely(!dev
)) {
226 if (dev
->class != ATA_DEV_ATA
) {
232 if (dev
->flags
& ATA_DFLAG_NO_UNLOAD
) {
237 dev
->unpark_deadline
= ata_deadline(jiffies
, input
);
238 dev
->link
->eh_info
.dev_action
[dev
->devno
] |= ATA_EH_PARK
;
239 ata_port_schedule_eh(ap
);
240 complete(&ap
->park_req_pending
);
244 dev
->flags
&= ~ATA_DFLAG_NO_UNLOAD
;
247 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
252 spin_unlock_irqrestore(ap
->lock
, flags
);
254 return rc
? rc
: len
;
256 DEVICE_ATTR(unload_heads
, S_IRUGO
| S_IWUSR
,
257 ata_scsi_park_show
, ata_scsi_park_store
);
258 EXPORT_SYMBOL_GPL(dev_attr_unload_heads
);
260 static void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
262 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
264 scsi_build_sense_buffer(0, cmd
->sense_buffer
, sk
, asc
, ascq
);
268 ata_scsi_em_message_store(struct device
*dev
, struct device_attribute
*attr
,
269 const char *buf
, size_t count
)
271 struct Scsi_Host
*shost
= class_to_shost(dev
);
272 struct ata_port
*ap
= ata_shost_to_port(shost
);
273 if (ap
->ops
->em_store
&& (ap
->flags
& ATA_FLAG_EM
))
274 return ap
->ops
->em_store(ap
, buf
, count
);
279 ata_scsi_em_message_show(struct device
*dev
, struct device_attribute
*attr
,
282 struct Scsi_Host
*shost
= class_to_shost(dev
);
283 struct ata_port
*ap
= ata_shost_to_port(shost
);
285 if (ap
->ops
->em_show
&& (ap
->flags
& ATA_FLAG_EM
))
286 return ap
->ops
->em_show(ap
, buf
);
289 DEVICE_ATTR(em_message
, S_IRUGO
| S_IWUSR
,
290 ata_scsi_em_message_show
, ata_scsi_em_message_store
);
291 EXPORT_SYMBOL_GPL(dev_attr_em_message
);
294 ata_scsi_em_message_type_show(struct device
*dev
, struct device_attribute
*attr
,
297 struct Scsi_Host
*shost
= class_to_shost(dev
);
298 struct ata_port
*ap
= ata_shost_to_port(shost
);
300 return snprintf(buf
, 23, "%d\n", ap
->em_message_type
);
302 DEVICE_ATTR(em_message_type
, S_IRUGO
,
303 ata_scsi_em_message_type_show
, NULL
);
304 EXPORT_SYMBOL_GPL(dev_attr_em_message_type
);
307 ata_scsi_activity_show(struct device
*dev
, struct device_attribute
*attr
,
310 struct scsi_device
*sdev
= to_scsi_device(dev
);
311 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
312 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
314 if (atadev
&& ap
->ops
->sw_activity_show
&&
315 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
))
316 return ap
->ops
->sw_activity_show(atadev
, buf
);
321 ata_scsi_activity_store(struct device
*dev
, struct device_attribute
*attr
,
322 const char *buf
, size_t count
)
324 struct scsi_device
*sdev
= to_scsi_device(dev
);
325 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
326 struct ata_device
*atadev
= ata_scsi_find_dev(ap
, sdev
);
327 enum sw_activity val
;
330 if (atadev
&& ap
->ops
->sw_activity_store
&&
331 (ap
->flags
& ATA_FLAG_SW_ACTIVITY
)) {
332 val
= simple_strtoul(buf
, NULL
, 0);
334 case OFF
: case BLINK_ON
: case BLINK_OFF
:
335 rc
= ap
->ops
->sw_activity_store(atadev
, val
);
344 DEVICE_ATTR(sw_activity
, S_IWUSR
| S_IRUGO
, ata_scsi_activity_show
,
345 ata_scsi_activity_store
);
346 EXPORT_SYMBOL_GPL(dev_attr_sw_activity
);
348 struct device_attribute
*ata_common_sdev_attrs
[] = {
349 &dev_attr_unload_heads
,
352 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs
);
354 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
)
356 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
357 /* "Invalid field in cbd" */
362 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
363 * @sdev: SCSI device for which BIOS geometry is to be determined
364 * @bdev: block device associated with @sdev
365 * @capacity: capacity of SCSI device
366 * @geom: location to which geometry will be output
368 * Generic bios head/sector/cylinder calculator
369 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
370 * mapping. Some situations may arise where the disk is not
371 * bootable if this is not used.
374 * Defined by the SCSI layer. We don't really care.
379 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
380 sector_t capacity
, int geom
[])
384 sector_div(capacity
, 255*63);
391 * ata_scsi_unlock_native_capacity - unlock native capacity
392 * @sdev: SCSI device to adjust device capacity for
394 * This function is called if a partition on @sdev extends beyond
395 * the end of the device. It requests EH to unlock HPA.
398 * Defined by the SCSI layer. Might sleep.
400 void ata_scsi_unlock_native_capacity(struct scsi_device
*sdev
)
402 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
403 struct ata_device
*dev
;
406 spin_lock_irqsave(ap
->lock
, flags
);
408 dev
= ata_scsi_find_dev(ap
, sdev
);
409 if (dev
&& dev
->n_sectors
< dev
->n_native_sectors
) {
410 dev
->flags
|= ATA_DFLAG_UNLOCK_HPA
;
411 dev
->link
->eh_info
.action
|= ATA_EH_RESET
;
412 ata_port_schedule_eh(ap
);
415 spin_unlock_irqrestore(ap
->lock
, flags
);
416 ata_port_wait_eh(ap
);
420 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
422 * @sdev: SCSI device to get identify data for
423 * @arg: User buffer area for identify data
426 * Defined by the SCSI layer. We don't really care.
429 * Zero on success, negative errno on error.
431 static int ata_get_identity(struct ata_port
*ap
, struct scsi_device
*sdev
,
434 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
435 u16 __user
*dst
= arg
;
441 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
444 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
445 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
448 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
449 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
452 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
453 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
460 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
461 * @scsidev: Device to which we are issuing command
462 * @arg: User provided data for issuing command
465 * Defined by the SCSI layer. We don't really care.
468 * Zero on success, negative errno on error.
470 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
473 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
474 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
476 enum dma_data_direction data_dir
;
482 if (copy_from_user(args
, arg
, sizeof(args
)))
485 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
489 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
492 argsize
= ATA_SECT_SIZE
* args
[3];
493 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
494 if (argbuf
== NULL
) {
499 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
500 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
501 block count in sector count field */
502 data_dir
= DMA_FROM_DEVICE
;
504 scsi_cmd
[1] = (3 << 1); /* Non-data */
505 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
509 scsi_cmd
[0] = ATA_16
;
511 scsi_cmd
[4] = args
[2];
512 if (args
[0] == ATA_CMD_SMART
) { /* hack -- ide driver does this too */
513 scsi_cmd
[6] = args
[3];
514 scsi_cmd
[8] = args
[1];
518 scsi_cmd
[6] = args
[1];
520 scsi_cmd
[14] = args
[0];
522 /* Good values for timeout and retries? Values below
523 from scsi_ioctl_send_command() for default case... */
524 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
525 sensebuf
, (10*HZ
), 5, 0, NULL
);
527 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
528 u8
*desc
= sensebuf
+ 8;
529 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
531 /* If we set cc then ATA pass-through will cause a
532 * check condition even if no error. Filter that. */
533 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
534 struct scsi_sense_hdr sshdr
;
535 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
537 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
538 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
539 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
542 /* Send userspace a few ATA registers (same as drivers/ide) */
543 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
544 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
545 args
[0] = desc
[13]; /* status */
546 args
[1] = desc
[3]; /* error */
547 args
[2] = desc
[5]; /* sector count (0:7) */
548 if (copy_to_user(arg
, args
, sizeof(args
)))
560 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
569 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
570 * @scsidev: Device to which we are issuing command
571 * @arg: User provided data for issuing command
574 * Defined by the SCSI layer. We don't really care.
577 * Zero on success, negative errno on error.
579 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
582 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
583 u8 args
[7], *sensebuf
= NULL
;
589 if (copy_from_user(args
, arg
, sizeof(args
)))
592 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
596 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
597 scsi_cmd
[0] = ATA_16
;
598 scsi_cmd
[1] = (3 << 1); /* Non-data */
599 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
600 scsi_cmd
[4] = args
[1];
601 scsi_cmd
[6] = args
[2];
602 scsi_cmd
[8] = args
[3];
603 scsi_cmd
[10] = args
[4];
604 scsi_cmd
[12] = args
[5];
605 scsi_cmd
[13] = args
[6] & 0x4f;
606 scsi_cmd
[14] = args
[0];
608 /* Good values for timeout and retries? Values below
609 from scsi_ioctl_send_command() for default case... */
610 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
611 sensebuf
, (10*HZ
), 5, 0, NULL
);
613 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
614 u8
*desc
= sensebuf
+ 8;
615 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
617 /* If we set cc then ATA pass-through will cause a
618 * check condition even if no error. Filter that. */
619 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
620 struct scsi_sense_hdr sshdr
;
621 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
623 if (sshdr
.sense_key
== RECOVERED_ERROR
&&
624 sshdr
.asc
== 0 && sshdr
.ascq
== 0x1d)
625 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
628 /* Send userspace ATA registers */
629 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
630 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
631 args
[0] = desc
[13]; /* status */
632 args
[1] = desc
[3]; /* error */
633 args
[2] = desc
[5]; /* sector count (0:7) */
634 args
[3] = desc
[7]; /* lbal */
635 args
[4] = desc
[9]; /* lbam */
636 args
[5] = desc
[11]; /* lbah */
637 args
[6] = desc
[12]; /* select */
638 if (copy_to_user(arg
, args
, sizeof(args
)))
653 static int ata_ioc32(struct ata_port
*ap
)
655 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
657 if (ap
->pflags
& ATA_PFLAG_PIO32
)
662 int ata_sas_scsi_ioctl(struct ata_port
*ap
, struct scsi_device
*scsidev
,
663 int cmd
, void __user
*arg
)
665 int val
= -EINVAL
, rc
= -EINVAL
;
669 case ATA_IOC_GET_IO32
:
670 spin_lock_irqsave(ap
->lock
, flags
);
672 spin_unlock_irqrestore(ap
->lock
, flags
);
673 if (copy_to_user(arg
, &val
, 1))
677 case ATA_IOC_SET_IO32
:
678 val
= (unsigned long) arg
;
680 spin_lock_irqsave(ap
->lock
, flags
);
681 if (ap
->pflags
& ATA_PFLAG_PIO32CHANGE
) {
683 ap
->pflags
|= ATA_PFLAG_PIO32
;
685 ap
->pflags
&= ~ATA_PFLAG_PIO32
;
687 if (val
!= ata_ioc32(ap
))
690 spin_unlock_irqrestore(ap
->lock
, flags
);
693 case HDIO_GET_IDENTITY
:
694 return ata_get_identity(ap
, scsidev
, arg
);
697 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
699 return ata_cmd_ioctl(scsidev
, arg
);
701 case HDIO_DRIVE_TASK
:
702 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
704 return ata_task_ioctl(scsidev
, arg
);
713 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl
);
715 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
717 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev
->host
),
720 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
723 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
724 * @dev: ATA device to which the new command is attached
725 * @cmd: SCSI command that originated this ATA command
727 * Obtain a reference to an unused ata_queued_cmd structure,
728 * which is the basic libata structure representing a single
729 * ATA command sent to the hardware.
731 * If a command was available, fill in the SCSI-specific
732 * portions of the structure with information on the
736 * spin_lock_irqsave(host lock)
739 * Command allocated, or %NULL if none available.
741 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
742 struct scsi_cmnd
*cmd
)
744 struct ata_queued_cmd
*qc
;
746 qc
= ata_qc_new_init(dev
);
749 qc
->scsidone
= cmd
->scsi_done
;
751 qc
->sg
= scsi_sglist(cmd
);
752 qc
->n_elem
= scsi_sg_count(cmd
);
754 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
761 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd
*qc
)
763 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
765 qc
->extrabytes
= scmd
->request
->extra_len
;
766 qc
->nbytes
= scsi_bufflen(scmd
) + qc
->extrabytes
;
770 * ata_dump_status - user friendly display of error info
771 * @id: id of the port in question
772 * @tf: ptr to filled out taskfile
774 * Decode and dump the ATA error/status registers for the user so
775 * that they have some idea what really happened at the non
776 * make-believe layer.
779 * inherited from caller
781 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
783 u8 stat
= tf
->command
, err
= tf
->feature
;
785 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
786 if (stat
& ATA_BUSY
) {
787 printk("Busy }\n"); /* Data is not valid in this case */
789 if (stat
& 0x40) printk("DriveReady ");
790 if (stat
& 0x20) printk("DeviceFault ");
791 if (stat
& 0x10) printk("SeekComplete ");
792 if (stat
& 0x08) printk("DataRequest ");
793 if (stat
& 0x04) printk("CorrectedError ");
794 if (stat
& 0x02) printk("Index ");
795 if (stat
& 0x01) printk("Error ");
799 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
800 if (err
& 0x04) printk("DriveStatusError ");
802 if (err
& 0x04) printk("BadCRC ");
803 else printk("Sector ");
805 if (err
& 0x40) printk("UncorrectableError ");
806 if (err
& 0x10) printk("SectorIdNotFound ");
807 if (err
& 0x02) printk("TrackZeroNotFound ");
808 if (err
& 0x01) printk("AddrMarkNotFound ");
815 * ata_to_sense_error - convert ATA error to SCSI error
816 * @id: ATA device number
817 * @drv_stat: value contained in ATA status register
818 * @drv_err: value contained in ATA error register
819 * @sk: the sense key we'll fill out
820 * @asc: the additional sense code we'll fill out
821 * @ascq: the additional sense code qualifier we'll fill out
822 * @verbose: be verbose
824 * Converts an ATA error into a SCSI error. Fill out pointers to
825 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
826 * format sense blocks.
829 * spin_lock_irqsave(host lock)
831 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
832 u8
*asc
, u8
*ascq
, int verbose
)
836 /* Based on the 3ware driver translation table */
837 static const unsigned char sense_table
[][4] = {
839 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
841 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
843 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
844 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
845 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
846 /* MC|ID|ABRT|TRK0|MARK */
847 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
849 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
850 /* Bad address mark */
851 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
853 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
854 /* Abort: 0x04 is not translated here, see below */
855 /* Media change request */
856 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
858 {0x10, ILLEGAL_REQUEST
, 0x21, 0x00}, // ID not found Logical address out of range
860 {0x20, UNIT_ATTENTION
, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
862 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
863 /* BBD - block marked bad */
864 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
865 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
867 static const unsigned char stat_table
[][4] = {
868 /* Must be first because BUSY means no other bits valid */
869 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
870 {0x20, HARDWARE_ERROR
, 0x44, 0x00}, // Device fault, internal target failure
871 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
872 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
873 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
877 * Is this an error we can process/parse
879 if (drv_stat
& ATA_BUSY
) {
880 drv_err
= 0; /* Ignore the err bits, they're invalid */
884 /* Look for drv_err */
885 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
886 /* Look for best matches first */
887 if ((sense_table
[i
][0] & drv_err
) ==
889 *sk
= sense_table
[i
][1];
890 *asc
= sense_table
[i
][2];
891 *ascq
= sense_table
[i
][3];
898 * Fall back to interpreting status bits. Note that if the drv_err
899 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
900 * is not descriptive enough.
902 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
903 if (stat_table
[i
][0] & drv_stat
) {
904 *sk
= stat_table
[i
][1];
905 *asc
= stat_table
[i
][2];
906 *ascq
= stat_table
[i
][3];
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.
915 *sk
= ABORTED_COMMAND
;
921 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
922 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
923 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
928 * ata_gen_passthru_sense - Generate check condition sense block.
929 * @qc: Command that completed.
931 * This function is specific to the ATA descriptor format sense
932 * block specified for the ATA pass through commands. Regardless
933 * of whether the command errored or not, return a sense
934 * block. Copy all controller registers into the sense
935 * block. If there was no error, we get the request from an ATA
936 * passthrough command, so we use the following sense data:
937 * sk = RECOVERED ERROR
938 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
944 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
946 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
947 struct ata_taskfile
*tf
= &qc
->result_tf
;
948 unsigned char *sb
= cmd
->sense_buffer
;
949 unsigned char *desc
= sb
+ 8;
950 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
952 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
954 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
957 * Use ata_to_sense_error() to map status register bits
958 * onto sense key, asc & ascq.
961 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
962 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
963 &sb
[1], &sb
[2], &sb
[3], verbose
);
966 sb
[1] = RECOVERED_ERROR
;
972 * Sense data is current and format is descriptor.
978 /* set length of additional sense data */
983 * Copy registers into sense buffer.
986 desc
[3] = tf
->feature
; /* == error reg */
991 desc
[12] = tf
->device
;
992 desc
[13] = tf
->command
; /* == status reg */
995 * Fill in Extend bit, and the high order bytes
998 if (tf
->flags
& ATA_TFLAG_LBA48
) {
1000 desc
[4] = tf
->hob_nsect
;
1001 desc
[6] = tf
->hob_lbal
;
1002 desc
[8] = tf
->hob_lbam
;
1003 desc
[10] = tf
->hob_lbah
;
1008 * ata_gen_ata_sense - generate a SCSI fixed sense block
1009 * @qc: Command that we are erroring out
1011 * Generate sense block for a failed ATA command @qc. Descriptor
1012 * format is used to accommodate LBA48 block address.
1017 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
1019 struct ata_device
*dev
= qc
->dev
;
1020 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1021 struct ata_taskfile
*tf
= &qc
->result_tf
;
1022 unsigned char *sb
= cmd
->sense_buffer
;
1023 unsigned char *desc
= sb
+ 8;
1024 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
1027 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
1029 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1031 /* sense data is current and format is descriptor */
1034 /* Use ata_to_sense_error() to map status register bits
1035 * onto sense key, asc & ascq.
1038 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
1039 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
1040 &sb
[1], &sb
[2], &sb
[3], verbose
);
1044 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
1046 /* information sense data descriptor */
1051 desc
[2] |= 0x80; /* valid */
1052 desc
[6] = block
>> 40;
1053 desc
[7] = block
>> 32;
1054 desc
[8] = block
>> 24;
1055 desc
[9] = block
>> 16;
1056 desc
[10] = block
>> 8;
1060 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
1062 sdev
->use_10_for_rw
= 1;
1063 sdev
->use_10_for_ms
= 1;
1064 sdev
->no_report_opcodes
= 1;
1065 sdev
->no_write_same
= 1;
1067 /* Schedule policy is determined by ->qc_defer() callback and
1068 * it needs to see every deferred qc. Set dev_blocked to 1 to
1069 * prevent SCSI midlayer from automatically deferring
1072 sdev
->max_device_blocked
= 1;
1076 * atapi_drain_needed - Check whether data transfer may overflow
1077 * @rq: request to be checked
1079 * ATAPI commands which transfer variable length data to host
1080 * might overflow due to application error or hardare bug. This
1081 * function checks whether overflow should be drained and ignored
1088 * 1 if ; otherwise, 0.
1090 static int atapi_drain_needed(struct request
*rq
)
1092 if (likely(rq
->cmd_type
!= REQ_TYPE_BLOCK_PC
))
1095 if (!blk_rq_bytes(rq
) || (rq
->cmd_flags
& REQ_WRITE
))
1098 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
1101 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
1102 struct ata_device
*dev
)
1104 struct request_queue
*q
= sdev
->request_queue
;
1106 if (!ata_id_has_unload(dev
->id
))
1107 dev
->flags
|= ATA_DFLAG_NO_UNLOAD
;
1109 /* configure max sectors */
1110 blk_queue_max_hw_sectors(q
, dev
->max_sectors
);
1112 if (dev
->class == ATA_DEV_ATAPI
) {
1115 sdev
->sector_size
= ATA_SECT_SIZE
;
1117 /* set DMA padding */
1118 blk_queue_update_dma_pad(q
, ATA_DMA_PAD_SZ
- 1);
1120 /* configure draining */
1121 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
1123 ata_dev_err(dev
, "drain buffer allocation failed\n");
1127 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
1129 sdev
->sector_size
= ata_id_logical_sector_size(dev
->id
);
1130 sdev
->manage_start_stop
= 1;
1134 * ata_pio_sectors() expects buffer for each sector to not cross
1135 * page boundary. Enforce it by requiring buffers to be sector
1136 * aligned, which works iff sector_size is not larger than
1137 * PAGE_SIZE. ATAPI devices also need the alignment as
1138 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1140 if (sdev
->sector_size
> PAGE_SIZE
)
1142 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1145 blk_queue_update_dma_alignment(q
, sdev
->sector_size
- 1);
1147 if (dev
->flags
& ATA_DFLAG_AN
)
1148 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
1150 if (dev
->flags
& ATA_DFLAG_NCQ
) {
1153 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
1154 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
1155 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
1158 blk_queue_flush_queueable(q
, false);
1165 * ata_scsi_slave_config - Set SCSI device attributes
1166 * @sdev: SCSI device to examine
1168 * This is called before we actually start reading
1169 * and writing to the device, to configure certain
1170 * SCSI mid-layer behaviors.
1173 * Defined by SCSI layer. We don't really care.
1176 int ata_scsi_slave_config(struct scsi_device
*sdev
)
1178 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1179 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
1182 ata_scsi_sdev_config(sdev
);
1185 rc
= ata_scsi_dev_config(sdev
, dev
);
1191 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1192 * @sdev: SCSI device to be destroyed
1194 * @sdev is about to be destroyed for hot/warm unplugging. If
1195 * this unplugging was initiated by libata as indicated by NULL
1196 * dev->sdev, this function doesn't have to do anything.
1197 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1198 * Clear dev->sdev, schedule the device for ATA detach and invoke
1202 * Defined by SCSI layer. We don't really care.
1204 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
1206 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1207 struct request_queue
*q
= sdev
->request_queue
;
1208 unsigned long flags
;
1209 struct ata_device
*dev
;
1211 if (!ap
->ops
->error_handler
)
1214 spin_lock_irqsave(ap
->lock
, flags
);
1215 dev
= __ata_scsi_find_dev(ap
, sdev
);
1216 if (dev
&& dev
->sdev
) {
1217 /* SCSI device already in CANCEL state, no need to offline it */
1219 dev
->flags
|= ATA_DFLAG_DETACH
;
1220 ata_port_schedule_eh(ap
);
1222 spin_unlock_irqrestore(ap
->lock
, flags
);
1224 kfree(q
->dma_drain_buffer
);
1225 q
->dma_drain_buffer
= NULL
;
1226 q
->dma_drain_size
= 0;
1230 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1231 * @ap: ATA port to which the device change the queue depth
1232 * @sdev: SCSI device to configure queue depth for
1233 * @queue_depth: new queue depth
1234 * @reason: calling context
1236 * libsas and libata have different approaches for associating a sdev to
1240 int __ata_change_queue_depth(struct ata_port
*ap
, struct scsi_device
*sdev
,
1241 int queue_depth
, int reason
)
1243 struct ata_device
*dev
;
1244 unsigned long flags
;
1246 if (reason
!= SCSI_QDEPTH_DEFAULT
)
1249 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1250 return sdev
->queue_depth
;
1252 dev
= ata_scsi_find_dev(ap
, sdev
);
1253 if (!dev
|| !ata_dev_enabled(dev
))
1254 return sdev
->queue_depth
;
1257 spin_lock_irqsave(ap
->lock
, flags
);
1258 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1259 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1260 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1263 spin_unlock_irqrestore(ap
->lock
, flags
);
1265 /* limit and apply queue depth */
1266 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1267 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1268 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1270 if (sdev
->queue_depth
== queue_depth
)
1273 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1278 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1279 * @sdev: SCSI device to configure queue depth for
1280 * @queue_depth: new queue depth
1281 * @reason: calling context
1283 * This is libata standard hostt->change_queue_depth callback.
1284 * SCSI will call into this callback when user tries to set queue
1288 * SCSI layer (we don't care)
1291 * Newly configured queue depth.
1293 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
,
1296 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1298 return __ata_change_queue_depth(ap
, sdev
, queue_depth
, reason
);
1302 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1303 * @qc: Storage for translated ATA taskfile
1305 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1306 * (to start). Perhaps these commands should be preceded by
1307 * CHECK POWER MODE to see what power mode the device is already in.
1308 * [See SAT revision 5 at www.t10.org]
1311 * spin_lock_irqsave(host lock)
1314 * Zero on success, non-zero on error.
1316 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1318 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1319 struct ata_taskfile
*tf
= &qc
->tf
;
1320 const u8
*cdb
= scmd
->cmnd
;
1322 if (scmd
->cmd_len
< 5)
1325 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1326 tf
->protocol
= ATA_PROT_NODATA
;
1328 ; /* ignore IMMED bit, violates sat-r05 */
1331 goto invalid_fld
; /* LOEJ bit set not supported */
1332 if (((cdb
[4] >> 4) & 0xf) != 0)
1333 goto invalid_fld
; /* power conditions not supported */
1336 tf
->nsect
= 1; /* 1 sector, lba=0 */
1338 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1339 tf
->flags
|= ATA_TFLAG_LBA
;
1344 tf
->device
|= ATA_LBA
;
1347 tf
->lbal
= 0x1; /* sect */
1348 tf
->lbam
= 0x0; /* cyl low */
1349 tf
->lbah
= 0x0; /* cyl high */
1352 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1354 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1355 * or S5) causing some drives to spin up and down again.
1357 if ((qc
->ap
->flags
& ATA_FLAG_NO_POWEROFF_SPINDOWN
) &&
1358 system_state
== SYSTEM_POWER_OFF
)
1361 if ((qc
->ap
->flags
& ATA_FLAG_NO_HIBERNATE_SPINDOWN
) &&
1362 system_entering_hibernation())
1365 /* Issue ATA STANDBY IMMEDIATE command */
1366 tf
->command
= ATA_CMD_STANDBYNOW1
;
1370 * Standby and Idle condition timers could be implemented but that
1371 * would require libata to implement the Power condition mode page
1372 * and allow the user to change it. Changing mode pages requires
1373 * MODE SELECT to be implemented.
1379 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1380 /* "Invalid field in cbd" */
1383 scmd
->result
= SAM_STAT_GOOD
;
1389 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1390 * @qc: Storage for translated ATA taskfile
1392 * Sets up an ATA taskfile to issue FLUSH CACHE or
1396 * spin_lock_irqsave(host lock)
1399 * Zero on success, non-zero on error.
1401 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1403 struct ata_taskfile
*tf
= &qc
->tf
;
1405 tf
->flags
|= ATA_TFLAG_DEVICE
;
1406 tf
->protocol
= ATA_PROT_NODATA
;
1408 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1409 tf
->command
= ATA_CMD_FLUSH_EXT
;
1411 tf
->command
= ATA_CMD_FLUSH
;
1413 /* flush is critical for IO integrity, consider it an IO command */
1414 qc
->flags
|= ATA_QCFLAG_IO
;
1420 * scsi_6_lba_len - Get LBA and transfer length
1421 * @cdb: SCSI command to translate
1423 * Calculate LBA and transfer length for 6-byte commands.
1427 * @plen: the transfer length
1429 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1434 VPRINTK("six-byte command\n");
1436 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1437 lba
|= ((u64
)cdb
[2]) << 8;
1438 lba
|= ((u64
)cdb
[3]);
1447 * scsi_10_lba_len - Get LBA and transfer length
1448 * @cdb: SCSI command to translate
1450 * Calculate LBA and transfer length for 10-byte commands.
1454 * @plen: the transfer length
1456 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1461 VPRINTK("ten-byte command\n");
1463 lba
|= ((u64
)cdb
[2]) << 24;
1464 lba
|= ((u64
)cdb
[3]) << 16;
1465 lba
|= ((u64
)cdb
[4]) << 8;
1466 lba
|= ((u64
)cdb
[5]);
1468 len
|= ((u32
)cdb
[7]) << 8;
1469 len
|= ((u32
)cdb
[8]);
1476 * scsi_16_lba_len - Get LBA and transfer length
1477 * @cdb: SCSI command to translate
1479 * Calculate LBA and transfer length for 16-byte commands.
1483 * @plen: the transfer length
1485 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1490 VPRINTK("sixteen-byte command\n");
1492 lba
|= ((u64
)cdb
[2]) << 56;
1493 lba
|= ((u64
)cdb
[3]) << 48;
1494 lba
|= ((u64
)cdb
[4]) << 40;
1495 lba
|= ((u64
)cdb
[5]) << 32;
1496 lba
|= ((u64
)cdb
[6]) << 24;
1497 lba
|= ((u64
)cdb
[7]) << 16;
1498 lba
|= ((u64
)cdb
[8]) << 8;
1499 lba
|= ((u64
)cdb
[9]);
1501 len
|= ((u32
)cdb
[10]) << 24;
1502 len
|= ((u32
)cdb
[11]) << 16;
1503 len
|= ((u32
)cdb
[12]) << 8;
1504 len
|= ((u32
)cdb
[13]);
1511 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1512 * @qc: Storage for translated ATA taskfile
1514 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1517 * spin_lock_irqsave(host lock)
1520 * Zero on success, non-zero on error.
1522 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1524 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1525 struct ata_taskfile
*tf
= &qc
->tf
;
1526 struct ata_device
*dev
= qc
->dev
;
1527 u64 dev_sectors
= qc
->dev
->n_sectors
;
1528 const u8
*cdb
= scmd
->cmnd
;
1532 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1533 tf
->protocol
= ATA_PROT_NODATA
;
1535 if (cdb
[0] == VERIFY
) {
1536 if (scmd
->cmd_len
< 10)
1538 scsi_10_lba_len(cdb
, &block
, &n_block
);
1539 } else if (cdb
[0] == VERIFY_16
) {
1540 if (scmd
->cmd_len
< 16)
1542 scsi_16_lba_len(cdb
, &block
, &n_block
);
1548 if (block
>= dev_sectors
)
1550 if ((block
+ n_block
) > dev_sectors
)
1553 if (dev
->flags
& ATA_DFLAG_LBA
) {
1554 tf
->flags
|= ATA_TFLAG_LBA
;
1556 if (lba_28_ok(block
, n_block
)) {
1558 tf
->command
= ATA_CMD_VERIFY
;
1559 tf
->device
|= (block
>> 24) & 0xf;
1560 } else if (lba_48_ok(block
, n_block
)) {
1561 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1565 tf
->flags
|= ATA_TFLAG_LBA48
;
1566 tf
->command
= ATA_CMD_VERIFY_EXT
;
1568 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1570 tf
->hob_lbah
= (block
>> 40) & 0xff;
1571 tf
->hob_lbam
= (block
>> 32) & 0xff;
1572 tf
->hob_lbal
= (block
>> 24) & 0xff;
1574 /* request too large even for LBA48 */
1577 tf
->nsect
= n_block
& 0xff;
1579 tf
->lbah
= (block
>> 16) & 0xff;
1580 tf
->lbam
= (block
>> 8) & 0xff;
1581 tf
->lbal
= block
& 0xff;
1583 tf
->device
|= ATA_LBA
;
1586 u32 sect
, head
, cyl
, track
;
1588 if (!lba_28_ok(block
, n_block
))
1591 /* Convert LBA to CHS */
1592 track
= (u32
)block
/ dev
->sectors
;
1593 cyl
= track
/ dev
->heads
;
1594 head
= track
% dev
->heads
;
1595 sect
= (u32
)block
% dev
->sectors
+ 1;
1597 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1598 (u32
)block
, track
, cyl
, head
, sect
);
1600 /* Check whether the converted CHS can fit.
1604 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1607 tf
->command
= ATA_CMD_VERIFY
;
1608 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1611 tf
->lbah
= cyl
>> 8;
1618 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1619 /* "Invalid field in cbd" */
1623 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1624 /* "Logical Block Address out of range" */
1628 scmd
->result
= SAM_STAT_GOOD
;
1633 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1634 * @qc: Storage for translated ATA taskfile
1636 * Converts any of six SCSI read/write commands into the
1637 * ATA counterpart, including starting sector (LBA),
1638 * sector count, and taking into account the device's LBA48
1641 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1642 * %WRITE_16 are currently supported.
1645 * spin_lock_irqsave(host lock)
1648 * Zero on success, non-zero on error.
1650 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1652 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1653 const u8
*cdb
= scmd
->cmnd
;
1654 unsigned int tf_flags
= 0;
1659 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1660 tf_flags
|= ATA_TFLAG_WRITE
;
1662 /* Calculate the SCSI LBA, transfer length and FUA. */
1666 if (unlikely(scmd
->cmd_len
< 10))
1668 scsi_10_lba_len(cdb
, &block
, &n_block
);
1669 if (cdb
[1] & (1 << 3))
1670 tf_flags
|= ATA_TFLAG_FUA
;
1674 if (unlikely(scmd
->cmd_len
< 6))
1676 scsi_6_lba_len(cdb
, &block
, &n_block
);
1678 /* for 6-byte r/w commands, transfer length 0
1679 * means 256 blocks of data, not 0 block.
1686 if (unlikely(scmd
->cmd_len
< 16))
1688 scsi_16_lba_len(cdb
, &block
, &n_block
);
1689 if (cdb
[1] & (1 << 3))
1690 tf_flags
|= ATA_TFLAG_FUA
;
1693 DPRINTK("no-byte command\n");
1697 /* Check and compose ATA command */
1699 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1700 * length 0 means transfer 0 block of data.
1701 * However, for ATA R/W commands, sector count 0 means
1702 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1704 * WARNING: one or two older ATA drives treat 0 as 0...
1708 qc
->flags
|= ATA_QCFLAG_IO
;
1709 qc
->nbytes
= n_block
* scmd
->device
->sector_size
;
1711 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1713 if (likely(rc
== 0))
1718 /* treat all other errors as -EINVAL, fall through */
1720 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1721 /* "Invalid field in cbd" */
1725 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1726 /* "Logical Block Address out of range" */
1730 scmd
->result
= SAM_STAT_GOOD
;
1734 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1736 struct ata_port
*ap
= qc
->ap
;
1737 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1738 u8
*cdb
= cmd
->cmnd
;
1739 int need_sense
= (qc
->err_mask
!= 0);
1741 /* For ATA pass thru (SAT) commands, generate a sense block if
1742 * user mandated it or if there's an error. Note that if we
1743 * generate because the user forced us to [CK_COND =1], a check
1744 * condition is generated and the ATA register values are returned
1745 * whether the command completed successfully or not. If there
1746 * was no error, we use the following sense data:
1747 * sk = RECOVERED ERROR
1748 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1750 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1751 ((cdb
[2] & 0x20) || need_sense
)) {
1752 ata_gen_passthru_sense(qc
);
1755 cmd
->result
= SAM_STAT_GOOD
;
1757 /* TODO: decide which descriptor format to use
1758 * for 48b LBA devices and call that here
1759 * instead of the fixed desc, which is only
1760 * good for smaller LBA (and maybe CHS?)
1763 ata_gen_ata_sense(qc
);
1767 if (need_sense
&& !ap
->ops
->error_handler
)
1768 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1776 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1777 * @dev: ATA device to which the command is addressed
1778 * @cmd: SCSI command to execute
1779 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1781 * Our ->queuecommand() function has decided that the SCSI
1782 * command issued can be directly translated into an ATA
1783 * command, rather than handled internally.
1785 * This function sets up an ata_queued_cmd structure for the
1786 * SCSI command, and sends that ata_queued_cmd to the hardware.
1788 * The xlat_func argument (actor) returns 0 if ready to execute
1789 * ATA command, else 1 to finish translation. If 1 is returned
1790 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1791 * to be set reflecting an error condition or clean (early)
1795 * spin_lock_irqsave(host lock)
1798 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1799 * needs to be deferred.
1801 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1802 ata_xlat_func_t xlat_func
)
1804 struct ata_port
*ap
= dev
->link
->ap
;
1805 struct ata_queued_cmd
*qc
;
1810 qc
= ata_scsi_qc_new(dev
, cmd
);
1814 /* data is present; dma-map it */
1815 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1816 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1817 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1818 ata_dev_warn(dev
, "WARNING: zero len r/w req\n");
1822 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1824 qc
->dma_dir
= cmd
->sc_data_direction
;
1827 qc
->complete_fn
= ata_scsi_qc_complete
;
1832 if (ap
->ops
->qc_defer
) {
1833 if ((rc
= ap
->ops
->qc_defer(qc
)))
1837 /* select device, send command to hardware */
1845 cmd
->scsi_done(cmd
);
1846 DPRINTK("EXIT - early finish (good or error)\n");
1851 cmd
->result
= (DID_ERROR
<< 16);
1852 cmd
->scsi_done(cmd
);
1854 DPRINTK("EXIT - internal\n");
1859 DPRINTK("EXIT - defer\n");
1860 if (rc
== ATA_DEFER_LINK
)
1861 return SCSI_MLQUEUE_DEVICE_BUSY
;
1863 return SCSI_MLQUEUE_HOST_BUSY
;
1867 * ata_scsi_rbuf_get - Map response buffer.
1868 * @cmd: SCSI command containing buffer to be mapped.
1869 * @flags: unsigned long variable to store irq enable status
1870 * @copy_in: copy in from user buffer
1872 * Prepare buffer for simulated SCSI commands.
1875 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1878 * Pointer to response buffer.
1880 static void *ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, bool copy_in
,
1881 unsigned long *flags
)
1883 spin_lock_irqsave(&ata_scsi_rbuf_lock
, *flags
);
1885 memset(ata_scsi_rbuf
, 0, ATA_SCSI_RBUF_SIZE
);
1887 sg_copy_to_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1888 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1889 return ata_scsi_rbuf
;
1893 * ata_scsi_rbuf_put - Unmap response buffer.
1894 * @cmd: SCSI command containing buffer to be unmapped.
1895 * @copy_out: copy out result
1896 * @flags: @flags passed to ata_scsi_rbuf_get()
1898 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1899 * @copy_back is true.
1902 * Unlocks ata_scsi_rbuf_lock.
1904 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, bool copy_out
,
1905 unsigned long *flags
)
1908 sg_copy_from_buffer(scsi_sglist(cmd
), scsi_sg_count(cmd
),
1909 ata_scsi_rbuf
, ATA_SCSI_RBUF_SIZE
);
1910 spin_unlock_irqrestore(&ata_scsi_rbuf_lock
, *flags
);
1914 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1915 * @args: device IDENTIFY data / SCSI command of interest.
1916 * @actor: Callback hook for desired SCSI command simulator
1918 * Takes care of the hard work of simulating a SCSI command...
1919 * Mapping the response buffer, calling the command's handler,
1920 * and handling the handler's return value. This return value
1921 * indicates whether the handler wishes the SCSI command to be
1922 * completed successfully (0), or not (in which case cmd->result
1923 * and sense buffer are assumed to be set).
1926 * spin_lock_irqsave(host lock)
1928 static void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1929 unsigned int (*actor
)(struct ata_scsi_args
*args
, u8
*rbuf
))
1933 struct scsi_cmnd
*cmd
= args
->cmd
;
1934 unsigned long flags
;
1936 rbuf
= ata_scsi_rbuf_get(cmd
, false, &flags
);
1937 rc
= actor(args
, rbuf
);
1938 ata_scsi_rbuf_put(cmd
, rc
== 0, &flags
);
1941 cmd
->result
= SAM_STAT_GOOD
;
1946 * ata_scsiop_inq_std - Simulate INQUIRY command
1947 * @args: device IDENTIFY data / SCSI command of interest.
1948 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1950 * Returns standard device identification data associated
1951 * with non-VPD INQUIRY command output.
1954 * spin_lock_irqsave(host lock)
1956 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
)
1958 const u8 versions
[] = {
1959 0x60, /* SAM-3 (no version claimed) */
1962 0x20, /* SBC-2 (no version claimed) */
1965 0x60 /* SPC-3 (no version claimed) */
1970 0x5, /* claim SPC-3 version compatibility */
1977 /* set scsi removeable (RMB) bit per ata bit */
1978 if (ata_id_removeable(args
->id
))
1981 memcpy(rbuf
, hdr
, sizeof(hdr
));
1982 memcpy(&rbuf
[8], "ATA ", 8);
1983 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1984 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1986 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1987 memcpy(&rbuf
[32], "n/a ", 4);
1989 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1995 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1996 * @args: device IDENTIFY data / SCSI command of interest.
1997 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1999 * Returns list of inquiry VPD pages available.
2002 * spin_lock_irqsave(host lock)
2004 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
)
2006 const u8 pages
[] = {
2007 0x00, /* page 0x00, this page */
2008 0x80, /* page 0x80, unit serial no page */
2009 0x83, /* page 0x83, device ident page */
2010 0x89, /* page 0x89, ata info page */
2011 0xb0, /* page 0xb0, block limits page */
2012 0xb1, /* page 0xb1, block device characteristics page */
2013 0xb2, /* page 0xb2, thin provisioning page */
2016 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
2017 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
2022 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2023 * @args: device IDENTIFY data / SCSI command of interest.
2024 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2026 * Returns ATA device serial number.
2029 * spin_lock_irqsave(host lock)
2031 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
)
2035 0x80, /* this page code */
2037 ATA_ID_SERNO_LEN
, /* page len */
2040 memcpy(rbuf
, hdr
, sizeof(hdr
));
2041 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
2042 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2047 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2048 * @args: device IDENTIFY data / SCSI command of interest.
2049 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2051 * Yields two logical unit device identification designators:
2052 * - vendor specific ASCII containing the ATA serial number
2053 * - SAT defined "t10 vendor id based" containing ASCII vendor
2054 * name ("ATA "), model and serial numbers.
2057 * spin_lock_irqsave(host lock)
2059 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
)
2061 const int sat_model_serial_desc_len
= 68;
2064 rbuf
[1] = 0x83; /* this page code */
2067 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2069 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
2071 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2072 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
2073 num
+= ATA_ID_SERNO_LEN
;
2075 /* SAT defined lu model and serial numbers descriptor */
2076 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2079 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
2081 memcpy(rbuf
+ num
, "ATA ", 8);
2083 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_PROD
,
2085 num
+= ATA_ID_PROD_LEN
;
2086 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
, ATA_ID_SERNO
,
2088 num
+= ATA_ID_SERNO_LEN
;
2090 if (ata_id_has_wwn(args
->id
)) {
2091 /* SAT defined lu world wide name */
2092 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2095 rbuf
[num
+ 3] = ATA_ID_WWN_LEN
;
2097 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
2098 ATA_ID_WWN
, ATA_ID_WWN_LEN
);
2099 num
+= ATA_ID_WWN_LEN
;
2101 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
2106 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2107 * @args: device IDENTIFY data / SCSI command of interest.
2108 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2110 * Yields SAT-specified ATA VPD page.
2113 * spin_lock_irqsave(host lock)
2115 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
)
2117 struct ata_taskfile tf
;
2119 memset(&tf
, 0, sizeof(tf
));
2121 rbuf
[1] = 0x89; /* our page code */
2122 rbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
2123 rbuf
[3] = (0x238 & 0xff);
2125 memcpy(&rbuf
[8], "linux ", 8);
2126 memcpy(&rbuf
[16], "libata ", 16);
2127 memcpy(&rbuf
[32], DRV_VERSION
, 4);
2129 /* we don't store the ATA device signature, so we fake it */
2131 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
2135 ata_tf_to_fis(&tf
, 0, 1, &rbuf
[36]); /* TODO: PMP? */
2136 rbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
2138 rbuf
[56] = ATA_CMD_ID_ATA
;
2140 memcpy(&rbuf
[60], &args
->id
[0], 512);
2144 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args
*args
, u8
*rbuf
)
2149 rbuf
[3] = 0x3c; /* required VPD size with unmap support */
2152 * Optimal transfer length granularity.
2154 * This is always one physical block, but for disks with a smaller
2155 * logical than physical sector size we need to figure out what the
2158 min_io_sectors
= 1 << ata_id_log2_per_physical_sector(args
->id
);
2159 put_unaligned_be16(min_io_sectors
, &rbuf
[6]);
2162 * Optimal unmap granularity.
2164 * The ATA spec doesn't even know about a granularity or alignment
2165 * for the TRIM command. We can leave away most of the unmap related
2166 * VPD page entries, but we have specifify a granularity to signal
2167 * that we support some form of unmap - in thise case via WRITE SAME
2168 * with the unmap bit set.
2170 if (ata_id_has_trim(args
->id
)) {
2171 put_unaligned_be64(65535 * 512 / 8, &rbuf
[36]);
2172 put_unaligned_be32(1, &rbuf
[28]);
2178 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args
*args
, u8
*rbuf
)
2180 int form_factor
= ata_id_form_factor(args
->id
);
2181 int media_rotation_rate
= ata_id_rotation_rate(args
->id
);
2185 rbuf
[4] = media_rotation_rate
>> 8;
2186 rbuf
[5] = media_rotation_rate
;
2187 rbuf
[7] = form_factor
;
2192 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args
*args
, u8
*rbuf
)
2194 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2197 rbuf
[5] = 1 << 6; /* TPWS */
2203 * ata_scsiop_noop - Command handler that simply returns success.
2204 * @args: device IDENTIFY data / SCSI command of interest.
2205 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2207 * No operation. Simply returns success to caller, to indicate
2208 * that the caller should successfully complete this SCSI command.
2211 * spin_lock_irqsave(host lock)
2213 static unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
)
2220 * modecpy - Prepare response for MODE SENSE
2221 * @dest: output buffer
2222 * @src: data being copied
2223 * @n: length of mode page
2224 * @changeable: whether changeable parameters are requested
2226 * Generate a generic MODE SENSE page for either current or changeable
2232 static void modecpy(u8
*dest
, const u8
*src
, int n
, bool changeable
)
2235 memcpy(dest
, src
, 2);
2236 memset(dest
+ 2, 0, n
- 2);
2238 memcpy(dest
, src
, n
);
2243 * ata_msense_caching - Simulate MODE SENSE caching info page
2244 * @id: device IDENTIFY data
2245 * @buf: output buffer
2246 * @changeable: whether changeable parameters are requested
2248 * Generate a caching info page, which conditionally indicates
2249 * write caching to the SCSI layer, depending on device
2255 static unsigned int ata_msense_caching(u16
*id
, u8
*buf
, bool changeable
)
2257 modecpy(buf
, def_cache_mpage
, sizeof(def_cache_mpage
), changeable
);
2258 if (changeable
|| ata_id_wcache_enabled(id
))
2259 buf
[2] |= (1 << 2); /* write cache enable */
2260 if (!changeable
&& !ata_id_rahead_enabled(id
))
2261 buf
[12] |= (1 << 5); /* disable read ahead */
2262 return sizeof(def_cache_mpage
);
2266 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2267 * @buf: output buffer
2268 * @changeable: whether changeable parameters are requested
2270 * Generate a generic MODE SENSE control mode page.
2275 static unsigned int ata_msense_ctl_mode(u8
*buf
, bool changeable
)
2277 modecpy(buf
, def_control_mpage
, sizeof(def_control_mpage
), changeable
);
2278 return sizeof(def_control_mpage
);
2282 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2283 * @buf: output buffer
2284 * @changeable: whether changeable parameters are requested
2286 * Generate a generic MODE SENSE r/w error recovery page.
2291 static unsigned int ata_msense_rw_recovery(u8
*buf
, bool changeable
)
2293 modecpy(buf
, def_rw_recovery_mpage
, sizeof(def_rw_recovery_mpage
),
2295 return sizeof(def_rw_recovery_mpage
);
2299 * We can turn this into a real blacklist if it's needed, for now just
2300 * blacklist any Maxtor BANC1G10 revision firmware
2302 static int ata_dev_supports_fua(u16
*id
)
2304 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2308 if (!ata_id_has_fua(id
))
2311 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2312 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2314 if (strcmp(model
, "Maxtor"))
2316 if (strcmp(fw
, "BANC1G10"))
2319 return 0; /* blacklisted */
2323 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2324 * @args: device IDENTIFY data / SCSI command of interest.
2325 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2327 * Simulate MODE SENSE commands. Assume this is invoked for direct
2328 * access devices (e.g. disks) only. There should be no block
2329 * descriptor for other device types.
2332 * spin_lock_irqsave(host lock)
2334 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
)
2336 struct ata_device
*dev
= args
->dev
;
2337 u8
*scsicmd
= args
->cmd
->cmnd
, *p
= rbuf
;
2338 const u8 sat_blk_desc
[] = {
2339 0, 0, 0, 0, /* number of blocks: sat unspecified */
2341 0, 0x2, 0x0 /* block length: 512 bytes */
2344 unsigned int ebd
, page_control
, six_byte
;
2349 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2350 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2352 * LLBA bit in msense(10) ignored (compliant)
2355 page_control
= scsicmd
[2] >> 6;
2356 switch (page_control
) {
2357 case 0: /* current */
2358 case 1: /* changeable */
2359 case 2: /* defaults */
2360 break; /* supported */
2362 goto saving_not_supp
;
2368 p
+= 4 + (ebd
? 8 : 0);
2370 p
+= 8 + (ebd
? 8 : 0);
2372 pg
= scsicmd
[2] & 0x3f;
2375 * No mode subpages supported (yet) but asking for _all_
2376 * subpages may be valid
2378 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2382 case RW_RECOVERY_MPAGE
:
2383 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2387 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2391 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2395 p
+= ata_msense_rw_recovery(p
, page_control
== 1);
2396 p
+= ata_msense_caching(args
->id
, p
, page_control
== 1);
2397 p
+= ata_msense_ctl_mode(p
, page_control
== 1);
2400 default: /* invalid page code */
2405 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2406 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2410 rbuf
[0] = p
- rbuf
- 1;
2413 rbuf
[3] = sizeof(sat_blk_desc
);
2414 memcpy(rbuf
+ 4, sat_blk_desc
, sizeof(sat_blk_desc
));
2417 unsigned int output_len
= p
- rbuf
- 2;
2419 rbuf
[0] = output_len
>> 8;
2420 rbuf
[1] = output_len
;
2423 rbuf
[7] = sizeof(sat_blk_desc
);
2424 memcpy(rbuf
+ 8, sat_blk_desc
, sizeof(sat_blk_desc
));
2430 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2431 /* "Invalid field in cbd" */
2435 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2436 /* "Saving parameters not supported" */
2441 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2442 * @args: device IDENTIFY data / SCSI command of interest.
2443 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2445 * Simulate READ CAPACITY commands.
2450 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
)
2452 struct ata_device
*dev
= args
->dev
;
2453 u64 last_lba
= dev
->n_sectors
- 1; /* LBA of the last block */
2454 u32 sector_size
; /* physical sector size in bytes */
2458 sector_size
= ata_id_logical_sector_size(dev
->id
);
2459 log2_per_phys
= ata_id_log2_per_physical_sector(dev
->id
);
2460 lowest_aligned
= ata_id_logical_sector_offset(dev
->id
, log2_per_phys
);
2464 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2465 if (last_lba
>= 0xffffffffULL
)
2466 last_lba
= 0xffffffff;
2468 /* sector count, 32-bit */
2469 rbuf
[0] = last_lba
>> (8 * 3);
2470 rbuf
[1] = last_lba
>> (8 * 2);
2471 rbuf
[2] = last_lba
>> (8 * 1);
2475 rbuf
[4] = sector_size
>> (8 * 3);
2476 rbuf
[5] = sector_size
>> (8 * 2);
2477 rbuf
[6] = sector_size
>> (8 * 1);
2478 rbuf
[7] = sector_size
;
2480 /* sector count, 64-bit */
2481 rbuf
[0] = last_lba
>> (8 * 7);
2482 rbuf
[1] = last_lba
>> (8 * 6);
2483 rbuf
[2] = last_lba
>> (8 * 5);
2484 rbuf
[3] = last_lba
>> (8 * 4);
2485 rbuf
[4] = last_lba
>> (8 * 3);
2486 rbuf
[5] = last_lba
>> (8 * 2);
2487 rbuf
[6] = last_lba
>> (8 * 1);
2491 rbuf
[ 8] = sector_size
>> (8 * 3);
2492 rbuf
[ 9] = sector_size
>> (8 * 2);
2493 rbuf
[10] = sector_size
>> (8 * 1);
2494 rbuf
[11] = sector_size
;
2497 rbuf
[13] = log2_per_phys
;
2498 rbuf
[14] = (lowest_aligned
>> 8) & 0x3f;
2499 rbuf
[15] = lowest_aligned
;
2501 if (ata_id_has_trim(args
->id
)) {
2502 rbuf
[14] |= 0x80; /* TPE */
2504 if (ata_id_has_zero_after_trim(args
->id
))
2505 rbuf
[14] |= 0x40; /* TPRZ */
2513 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2514 * @args: device IDENTIFY data / SCSI command of interest.
2515 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2517 * Simulate REPORT LUNS command.
2520 * spin_lock_irqsave(host lock)
2522 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
)
2525 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2530 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2532 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2533 /* FIXME: not quite right; we don't want the
2534 * translation of taskfile registers into
2535 * a sense descriptors, since that's only
2536 * correct for ATA, not ATAPI
2538 ata_gen_passthru_sense(qc
);
2541 qc
->scsidone(qc
->scsicmd
);
2545 /* is it pointless to prefer PIO for "safety reasons"? */
2546 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2548 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2551 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2553 struct ata_port
*ap
= qc
->ap
;
2554 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2556 DPRINTK("ATAPI request sense\n");
2558 /* FIXME: is this needed? */
2559 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2561 #ifdef CONFIG_ATA_SFF
2562 if (ap
->ops
->sff_tf_read
)
2563 ap
->ops
->sff_tf_read(ap
, &qc
->tf
);
2566 /* fill these in, for the case where they are -not- overwritten */
2567 cmd
->sense_buffer
[0] = 0x70;
2568 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2572 /* setup sg table and init transfer direction */
2573 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2574 ata_sg_init(qc
, &qc
->sgent
, 1);
2575 qc
->dma_dir
= DMA_FROM_DEVICE
;
2577 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2578 qc
->cdb
[0] = REQUEST_SENSE
;
2579 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2581 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2582 qc
->tf
.command
= ATA_CMD_PACKET
;
2584 if (ata_pio_use_silly(ap
)) {
2585 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2586 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2588 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2589 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2592 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2594 qc
->complete_fn
= atapi_sense_complete
;
2601 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2603 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2604 unsigned int err_mask
= qc
->err_mask
;
2606 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2608 /* handle completion from new EH */
2609 if (unlikely(qc
->ap
->ops
->error_handler
&&
2610 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2612 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2613 /* FIXME: not quite right; we don't want the
2614 * translation of taskfile registers into a
2615 * sense descriptors, since that's only
2616 * correct for ATA, not ATAPI
2618 ata_gen_passthru_sense(qc
);
2621 /* SCSI EH automatically locks door if sdev->locked is
2622 * set. Sometimes door lock request continues to
2623 * fail, for example, when no media is present. This
2624 * creates a loop - SCSI EH issues door lock which
2625 * fails and gets invoked again to acquire sense data
2626 * for the failed command.
2628 * If door lock fails, always clear sdev->locked to
2629 * avoid this infinite loop.
2631 * This may happen before SCSI scan is complete. Make
2632 * sure qc->dev->sdev isn't NULL before dereferencing.
2634 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
&& qc
->dev
->sdev
)
2635 qc
->dev
->sdev
->locked
= 0;
2637 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2643 /* successful completion or old EH failure path */
2644 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2645 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2646 atapi_request_sense(qc
);
2648 } else if (unlikely(err_mask
)) {
2649 /* FIXME: not quite right; we don't want the
2650 * translation of taskfile registers into
2651 * a sense descriptors, since that's only
2652 * correct for ATA, not ATAPI
2654 ata_gen_passthru_sense(qc
);
2656 u8
*scsicmd
= cmd
->cmnd
;
2658 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2659 unsigned long flags
;
2662 buf
= ata_scsi_rbuf_get(cmd
, true, &flags
);
2664 /* ATAPI devices typically report zero for their SCSI version,
2665 * and sometimes deviate from the spec WRT response data
2666 * format. If SCSI version is reported as zero like normal,
2667 * then we make the following fixups: 1) Fake MMC-5 version,
2668 * to indicate to the Linux scsi midlayer this is a modern
2669 * device. 2) Ensure response data format / ATAPI information
2670 * are always correct.
2677 ata_scsi_rbuf_put(cmd
, true, &flags
);
2680 cmd
->result
= SAM_STAT_GOOD
;
2687 * atapi_xlat - Initialize PACKET taskfile
2688 * @qc: command structure to be initialized
2691 * spin_lock_irqsave(host lock)
2694 * Zero on success, non-zero on failure.
2696 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2698 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2699 struct ata_device
*dev
= qc
->dev
;
2700 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2701 int using_pio
= !nodata
&& (dev
->flags
& ATA_DFLAG_PIO
);
2702 unsigned int nbytes
;
2704 memset(qc
->cdb
, 0, dev
->cdb_len
);
2705 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2707 qc
->complete_fn
= atapi_qc_complete
;
2709 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2710 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2711 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2712 DPRINTK("direction: write\n");
2715 qc
->tf
.command
= ATA_CMD_PACKET
;
2716 ata_qc_set_pc_nbytes(qc
);
2718 /* check whether ATAPI DMA is safe */
2719 if (!nodata
&& !using_pio
&& atapi_check_dma(qc
))
2722 /* Some controller variants snoop this value for Packet
2723 * transfers to do state machine and FIFO management. Thus we
2724 * want to set it properly, and for DMA where it is
2725 * effectively meaningless.
2727 nbytes
= min(ata_qc_raw_nbytes(qc
), (unsigned int)63 * 1024);
2729 /* Most ATAPI devices which honor transfer chunk size don't
2730 * behave according to the spec when odd chunk size which
2731 * matches the transfer length is specified. If the number of
2732 * bytes to transfer is 2n+1. According to the spec, what
2733 * should happen is to indicate that 2n+1 is going to be
2734 * transferred and transfer 2n+2 bytes where the last byte is
2737 * In practice, this doesn't happen. ATAPI devices first
2738 * indicate and transfer 2n bytes and then indicate and
2739 * transfer 2 bytes where the last byte is padding.
2741 * This inconsistency confuses several controllers which
2742 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2743 * These controllers use actual number of transferred bytes to
2744 * update DMA poitner and transfer of 4n+2 bytes make those
2745 * controller push DMA pointer by 4n+4 bytes because SATA data
2746 * FISes are aligned to 4 bytes. This causes data corruption
2747 * and buffer overrun.
2749 * Always setting nbytes to even number solves this problem
2750 * because then ATAPI devices don't have to split data at 2n
2756 qc
->tf
.lbam
= (nbytes
& 0xFF);
2757 qc
->tf
.lbah
= (nbytes
>> 8);
2760 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2762 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2765 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2766 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2768 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2769 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2770 /* some SATA bridges need us to indicate data xfer direction */
2771 qc
->tf
.feature
|= ATAPI_DMADIR
;
2775 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2776 as ATAPI tape drives don't get this right otherwise */
2780 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2782 if (!sata_pmp_attached(ap
)) {
2783 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2784 return &ap
->link
.device
[devno
];
2786 if (likely(devno
< ap
->nr_pmp_links
))
2787 return &ap
->pmp_link
[devno
].device
[0];
2793 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2794 const struct scsi_device
*scsidev
)
2798 /* skip commands not addressed to targets we simulate */
2799 if (!sata_pmp_attached(ap
)) {
2800 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2802 devno
= scsidev
->id
;
2804 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2806 devno
= scsidev
->channel
;
2809 return ata_find_dev(ap
, devno
);
2813 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2814 * @ap: ATA port to which the device is attached
2815 * @scsidev: SCSI device from which we derive the ATA device
2817 * Given various information provided in struct scsi_cmnd,
2818 * map that onto an ATA bus, and using that mapping
2819 * determine which ata_device is associated with the
2820 * SCSI command to be sent.
2823 * spin_lock_irqsave(host lock)
2826 * Associated ATA device, or %NULL if not found.
2828 static struct ata_device
*
2829 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2831 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2833 if (unlikely(!dev
|| !ata_dev_enabled(dev
)))
2840 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2841 * @byte1: Byte 1 from pass-thru CDB.
2844 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2847 ata_scsi_map_proto(u8 byte1
)
2849 switch((byte1
& 0x1e) >> 1) {
2850 case 3: /* Non-data */
2851 return ATA_PROT_NODATA
;
2854 case 10: /* UDMA Data-in */
2855 case 11: /* UDMA Data-Out */
2856 return ATA_PROT_DMA
;
2858 case 4: /* PIO Data-in */
2859 case 5: /* PIO Data-out */
2860 return ATA_PROT_PIO
;
2862 case 0: /* Hard Reset */
2864 case 8: /* Device Diagnostic */
2865 case 9: /* Device Reset */
2866 case 7: /* DMA Queued */
2867 case 12: /* FPDMA */
2868 case 15: /* Return Response Info */
2869 default: /* Reserved */
2873 return ATA_PROT_UNKNOWN
;
2877 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2878 * @qc: command structure to be initialized
2880 * Handles either 12 or 16-byte versions of the CDB.
2883 * Zero on success, non-zero on failure.
2885 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2887 struct ata_taskfile
*tf
= &(qc
->tf
);
2888 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2889 struct ata_device
*dev
= qc
->dev
;
2890 const u8
*cdb
= scmd
->cmnd
;
2892 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2896 * 12 and 16 byte CDBs use different offsets to
2897 * provide the various register values.
2899 if (cdb
[0] == ATA_16
) {
2901 * 16-byte CDB - may contain extended commands.
2903 * If that is the case, copy the upper byte register values.
2905 if (cdb
[1] & 0x01) {
2906 tf
->hob_feature
= cdb
[3];
2907 tf
->hob_nsect
= cdb
[5];
2908 tf
->hob_lbal
= cdb
[7];
2909 tf
->hob_lbam
= cdb
[9];
2910 tf
->hob_lbah
= cdb
[11];
2911 tf
->flags
|= ATA_TFLAG_LBA48
;
2913 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2916 * Always copy low byte, device and command registers.
2918 tf
->feature
= cdb
[4];
2923 tf
->device
= cdb
[13];
2924 tf
->command
= cdb
[14];
2927 * 12-byte CDB - incapable of extended commands.
2929 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2931 tf
->feature
= cdb
[3];
2936 tf
->device
= cdb
[8];
2937 tf
->command
= cdb
[9];
2940 /* enforce correct master/slave bit */
2941 tf
->device
= dev
->devno
?
2942 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2944 switch (tf
->command
) {
2945 /* READ/WRITE LONG use a non-standard sect_size */
2946 case ATA_CMD_READ_LONG
:
2947 case ATA_CMD_READ_LONG_ONCE
:
2948 case ATA_CMD_WRITE_LONG
:
2949 case ATA_CMD_WRITE_LONG_ONCE
:
2950 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2952 qc
->sect_size
= scsi_bufflen(scmd
);
2955 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2956 case ATA_CMD_CFA_WRITE_NE
:
2957 case ATA_CMD_CFA_TRANS_SECT
:
2958 case ATA_CMD_CFA_WRITE_MULT_NE
:
2959 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2961 case ATA_CMD_READ_EXT
:
2962 case ATA_CMD_READ_QUEUED
:
2963 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2964 case ATA_CMD_FPDMA_READ
:
2965 case ATA_CMD_READ_MULTI
:
2966 case ATA_CMD_READ_MULTI_EXT
:
2967 case ATA_CMD_PIO_READ
:
2968 case ATA_CMD_PIO_READ_EXT
:
2969 case ATA_CMD_READ_STREAM_DMA_EXT
:
2970 case ATA_CMD_READ_STREAM_EXT
:
2971 case ATA_CMD_VERIFY
:
2972 case ATA_CMD_VERIFY_EXT
:
2974 case ATA_CMD_WRITE_EXT
:
2975 case ATA_CMD_WRITE_FUA_EXT
:
2976 case ATA_CMD_WRITE_QUEUED
:
2977 case ATA_CMD_WRITE_QUEUED_FUA_EXT
:
2978 case ATA_CMD_FPDMA_WRITE
:
2979 case ATA_CMD_WRITE_MULTI
:
2980 case ATA_CMD_WRITE_MULTI_EXT
:
2981 case ATA_CMD_WRITE_MULTI_FUA_EXT
:
2982 case ATA_CMD_PIO_WRITE
:
2983 case ATA_CMD_PIO_WRITE_EXT
:
2984 case ATA_CMD_WRITE_STREAM_DMA_EXT
:
2985 case ATA_CMD_WRITE_STREAM_EXT
:
2986 qc
->sect_size
= scmd
->device
->sector_size
;
2989 /* Everything else uses 512 byte "sectors" */
2991 qc
->sect_size
= ATA_SECT_SIZE
;
2995 * Set flags so that all registers will be written, pass on
2996 * write indication (used for PIO/DMA setup), result TF is
2997 * copied back and we don't whine too much about its failure.
2999 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
3000 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
3001 tf
->flags
|= ATA_TFLAG_WRITE
;
3003 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
3006 * Set transfer length.
3008 * TODO: find out if we need to do more here to
3009 * cover scatter/gather case.
3011 ata_qc_set_pc_nbytes(qc
);
3013 /* We may not issue DMA commands if no DMA mode is set */
3014 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
3017 /* sanity check for pio multi commands */
3018 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
3021 if (is_multi_taskfile(tf
)) {
3022 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
3024 /* compare the passed through multi_count
3025 * with the cached multi_count of libata
3027 if (multi_count
!= dev
->multi_count
)
3028 ata_dev_warn(dev
, "invalid multi_count %u ignored\n",
3033 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3034 * SET_FEATURES - XFER MODE must be preceded/succeeded
3035 * by an update to hardware-specific registers for each
3036 * controller (i.e. the reason for ->set_piomode(),
3037 * ->set_dmamode(), and ->post_set_mode() hooks).
3039 if (tf
->command
== ATA_CMD_SET_FEATURES
&&
3040 tf
->feature
== SETFEATURES_XFER
)
3044 * Filter TPM commands by default. These provide an
3045 * essentially uncontrolled encrypted "back door" between
3046 * applications and the disk. Set libata.allow_tpm=1 if you
3047 * have a real reason for wanting to use them. This ensures
3048 * that installed software cannot easily mess stuff up without
3049 * user intent. DVR type users will probably ship with this enabled
3050 * for movie content management.
3052 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3053 * for this and should do in future but that it is not sufficient as
3054 * DCS is an optional feature set. Thus we also do the software filter
3055 * so that we comply with the TC consortium stated goal that the user
3056 * can turn off TC features of their system.
3058 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
3064 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3065 /* "Invalid field in cdb" */
3069 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd
*qc
)
3071 struct ata_taskfile
*tf
= &qc
->tf
;
3072 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3073 struct ata_device
*dev
= qc
->dev
;
3074 const u8
*cdb
= scmd
->cmnd
;
3080 /* we may not issue DMA commands if no DMA mode is set */
3081 if (unlikely(!dev
->dma_mode
))
3084 if (unlikely(scmd
->cmd_len
< 16))
3086 scsi_16_lba_len(cdb
, &block
, &n_block
);
3088 /* for now we only support WRITE SAME with the unmap bit set */
3089 if (unlikely(!(cdb
[1] & 0x8)))
3093 * WRITE SAME always has a sector sized buffer as payload, this
3094 * should never be a multiple entry S/G list.
3096 if (!scsi_sg_count(scmd
))
3099 buf
= page_address(sg_page(scsi_sglist(scmd
)));
3100 size
= ata_set_lba_range_entries(buf
, 512, block
, n_block
);
3102 if (ata_ncq_enabled(dev
) && ata_fpdma_dsm_supported(dev
)) {
3103 /* Newer devices support queued TRIM commands */
3104 tf
->protocol
= ATA_PROT_NCQ
;
3105 tf
->command
= ATA_CMD_FPDMA_SEND
;
3106 tf
->hob_nsect
= ATA_SUBCMD_FPDMA_SEND_DSM
& 0x1f;
3107 tf
->nsect
= qc
->tag
<< 3;
3108 tf
->hob_feature
= (size
/ 512) >> 8;
3109 tf
->feature
= size
/ 512;
3113 tf
->protocol
= ATA_PROT_DMA
;
3114 tf
->hob_feature
= 0;
3115 tf
->feature
= ATA_DSM_TRIM
;
3116 tf
->hob_nsect
= (size
/ 512) >> 8;
3117 tf
->nsect
= size
/ 512;
3118 tf
->command
= ATA_CMD_DSM
;
3121 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
| ATA_TFLAG_LBA48
|
3124 ata_qc_set_pc_nbytes(qc
);
3129 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
3130 /* "Invalid field in cdb" */
3135 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3136 * @qc: Storage for translated ATA taskfile
3137 * @buf: input buffer
3138 * @len: number of valid bytes in the input buffer
3140 * Prepare a taskfile to modify caching information for the device.
3145 static int ata_mselect_caching(struct ata_queued_cmd
*qc
,
3146 const u8
*buf
, int len
)
3148 struct ata_taskfile
*tf
= &qc
->tf
;
3149 struct ata_device
*dev
= qc
->dev
;
3150 char mpage
[CACHE_MPAGE_LEN
];
3154 * The first two bytes of def_cache_mpage are a header, so offsets
3155 * in mpage are off by 2 compared to buf. Same for len.
3158 if (len
!= CACHE_MPAGE_LEN
- 2)
3161 wce
= buf
[0] & (1 << 2);
3164 * Check that read-only bits are not modified.
3166 ata_msense_caching(dev
->id
, mpage
, false);
3167 mpage
[2] &= ~(1 << 2);
3169 if (memcmp(mpage
+ 2, buf
, CACHE_MPAGE_LEN
- 2) != 0)
3172 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
3173 tf
->protocol
= ATA_PROT_NODATA
;
3175 tf
->command
= ATA_CMD_SET_FEATURES
;
3176 tf
->feature
= wce
? SETFEATURES_WC_ON
: SETFEATURES_WC_OFF
;
3181 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3182 * @qc: Storage for translated ATA taskfile
3184 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3185 * Assume this is invoked for direct access devices (e.g. disks) only.
3186 * There should be no block descriptor for other device types.
3189 * spin_lock_irqsave(host lock)
3191 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd
*qc
)
3193 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
3194 const u8
*cdb
= scmd
->cmnd
;
3197 unsigned six_byte
, pg_len
, hdr_len
, bd_len
;
3202 six_byte
= (cdb
[0] == MODE_SELECT
);
3204 if (scmd
->cmd_len
< 5)
3210 if (scmd
->cmd_len
< 9)
3213 len
= (cdb
[7] << 8) + cdb
[8];
3217 /* We only support PF=1, SP=0. */
3218 if ((cdb
[1] & 0x11) != 0x10)
3221 /* Test early for possible overrun. */
3222 if (!scsi_sg_count(scmd
) || scsi_sglist(scmd
)->length
< len
)
3223 goto invalid_param_len
;
3225 p
= page_address(sg_page(scsi_sglist(scmd
)));
3227 /* Move past header and block descriptors. */
3229 goto invalid_param_len
;
3234 bd_len
= (p
[6] << 8) + p
[7];
3239 goto invalid_param_len
;
3240 if (bd_len
!= 0 && bd_len
!= 8)
3248 /* Parse both possible formats for the mode page headers. */
3252 goto invalid_param_len
;
3255 pg_len
= (p
[2] << 8) | p
[3];
3260 goto invalid_param_len
;
3269 * No mode subpages supported (yet) but asking for _all_
3270 * subpages may be valid
3272 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
3275 goto invalid_param_len
;
3279 if (ata_mselect_caching(qc
, p
, pg_len
) < 0)
3283 default: /* invalid page code */
3288 * Only one page has changeable data, so we only support setting one
3297 /* "Invalid field in CDB" */
3298 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
3302 /* "Invalid field in parameter list" */
3303 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x26, 0x0);
3307 /* "Parameter list length error" */
3308 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x1a, 0x0);
3312 scmd
->result
= SAM_STAT_GOOD
;
3317 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3319 * @cmd: SCSI command opcode to consider
3321 * Look up the SCSI command given, and determine whether the
3322 * SCSI command is to be translated or simulated.
3325 * Pointer to translation function if possible, %NULL if not.
3328 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
3338 return ata_scsi_rw_xlat
;
3341 return ata_scsi_write_same_xlat
;
3343 case SYNCHRONIZE_CACHE
:
3344 if (ata_try_flush_cache(dev
))
3345 return ata_scsi_flush_xlat
;
3350 return ata_scsi_verify_xlat
;
3354 return ata_scsi_pass_thru
;
3357 case MODE_SELECT_10
:
3358 return ata_scsi_mode_select_xlat
;
3362 return ata_scsi_start_stop_xlat
;
3369 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3370 * @ap: ATA port to which the command was being sent
3371 * @cmd: SCSI command to dump
3373 * Prints the contents of a SCSI command via printk().
3376 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3377 struct scsi_cmnd
*cmd
)
3380 struct scsi_device
*scsidev
= cmd
->device
;
3381 u8
*scsicmd
= cmd
->cmnd
;
3383 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3385 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3386 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3387 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3392 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3393 struct ata_device
*dev
)
3395 u8 scsi_op
= scmd
->cmnd
[0];
3396 ata_xlat_func_t xlat_func
;
3399 if (dev
->class == ATA_DEV_ATA
) {
3400 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3403 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3405 if (unlikely(!scmd
->cmd_len
))
3409 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3410 /* relay SCSI command to ATAPI device */
3411 int len
= COMMAND_SIZE(scsi_op
);
3412 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3415 xlat_func
= atapi_xlat
;
3417 /* ATA_16 passthru, treat as an ATA command */
3418 if (unlikely(scmd
->cmd_len
> 16))
3421 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3426 rc
= ata_scsi_translate(dev
, scmd
, xlat_func
);
3428 ata_scsi_simulate(dev
, scmd
);
3433 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3434 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3435 scmd
->result
= DID_ERROR
<< 16;
3436 scmd
->scsi_done(scmd
);
3441 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3442 * @shost: SCSI host of command to be sent
3443 * @cmd: SCSI command to be sent
3445 * In some cases, this function translates SCSI commands into
3446 * ATA taskfiles, and queues the taskfiles to be sent to
3447 * hardware. In other cases, this function simulates a
3448 * SCSI device by evaluating and responding to certain
3449 * SCSI commands. This creates the overall effect of
3450 * ATA and ATAPI devices appearing as SCSI devices.
3456 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3459 int ata_scsi_queuecmd(struct Scsi_Host
*shost
, struct scsi_cmnd
*cmd
)
3461 struct ata_port
*ap
;
3462 struct ata_device
*dev
;
3463 struct scsi_device
*scsidev
= cmd
->device
;
3465 unsigned long irq_flags
;
3467 ap
= ata_shost_to_port(shost
);
3469 spin_lock_irqsave(ap
->lock
, irq_flags
);
3471 ata_scsi_dump_cdb(ap
, cmd
);
3473 dev
= ata_scsi_find_dev(ap
, scsidev
);
3475 rc
= __ata_scsi_queuecmd(cmd
, dev
);
3477 cmd
->result
= (DID_BAD_TARGET
<< 16);
3478 cmd
->scsi_done(cmd
);
3481 spin_unlock_irqrestore(ap
->lock
, irq_flags
);
3487 * ata_scsi_simulate - simulate SCSI command on ATA device
3488 * @dev: the target device
3489 * @cmd: SCSI command being sent to device.
3491 * Interprets and directly executes a select list of SCSI commands
3492 * that can be handled internally.
3495 * spin_lock_irqsave(host lock)
3498 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
)
3500 struct ata_scsi_args args
;
3501 const u8
*scsicmd
= cmd
->cmnd
;
3507 args
.done
= cmd
->scsi_done
;
3509 switch(scsicmd
[0]) {
3510 /* TODO: worth improving? */
3512 ata_scsi_invalid_field(cmd
);
3516 if (scsicmd
[1] & 2) /* is CmdDt set? */
3517 ata_scsi_invalid_field(cmd
);
3518 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3519 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3520 else switch (scsicmd
[2]) {
3522 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3525 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3528 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3531 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3534 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b0
);
3537 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b1
);
3540 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_b2
);
3543 ata_scsi_invalid_field(cmd
);
3550 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3554 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3557 case SERVICE_ACTION_IN
:
3558 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3559 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3561 ata_scsi_invalid_field(cmd
);
3565 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3569 ata_scsi_set_sense(cmd
, 0, 0, 0);
3570 cmd
->result
= (DRIVER_SENSE
<< 24);
3571 cmd
->scsi_done(cmd
);
3574 /* if we reach this, then writeback caching is disabled,
3575 * turning this into a no-op.
3577 case SYNCHRONIZE_CACHE
:
3580 /* no-op's, complete with success */
3584 case TEST_UNIT_READY
:
3585 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3588 case SEND_DIAGNOSTIC
:
3589 tmp8
= scsicmd
[1] & ~(1 << 3);
3590 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3591 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3593 ata_scsi_invalid_field(cmd
);
3596 /* all other commands */
3598 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3599 /* "Invalid command operation code" */
3600 cmd
->scsi_done(cmd
);
3605 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3609 for (i
= 0; i
< host
->n_ports
; i
++) {
3610 struct ata_port
*ap
= host
->ports
[i
];
3611 struct Scsi_Host
*shost
;
3614 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3618 shost
->eh_noresume
= 1;
3619 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3620 ap
->scsi_host
= shost
;
3622 shost
->transportt
= ata_scsi_transport_template
;
3623 shost
->unique_id
= ap
->print_id
;
3626 shost
->max_channel
= 1;
3627 shost
->max_cmd_len
= 16;
3628 shost
->no_write_same
= 1;
3630 /* Schedule policy is determined by ->qc_defer()
3631 * callback and it needs to see every deferred qc.
3632 * Set host_blocked to 1 to prevent SCSI midlayer from
3633 * automatically deferring requests.
3635 shost
->max_host_blocked
= 1;
3637 rc
= scsi_add_host_with_dma(ap
->scsi_host
,
3638 &ap
->tdev
, ap
->host
->dev
);
3646 scsi_host_put(host
->ports
[i
]->scsi_host
);
3649 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3651 scsi_remove_host(shost
);
3652 scsi_host_put(shost
);
3657 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3660 struct ata_device
*last_failed_dev
= NULL
;
3661 struct ata_link
*link
;
3662 struct ata_device
*dev
;
3665 ata_for_each_link(link
, ap
, EDGE
) {
3666 ata_for_each_dev(dev
, link
, ENABLED
) {
3667 struct scsi_device
*sdev
;
3668 int channel
= 0, id
= 0;
3673 if (ata_is_host_link(link
))
3676 channel
= link
->pmp
;
3678 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3680 if (!IS_ERR(sdev
)) {
3682 scsi_device_put(sdev
);
3689 /* If we scanned while EH was in progress or allocation
3690 * failure occurred, scan would have failed silently. Check
3691 * whether all devices are attached.
3693 ata_for_each_link(link
, ap
, EDGE
) {
3694 ata_for_each_dev(dev
, link
, ENABLED
) {
3703 /* we're missing some SCSI devices */
3705 /* If caller requested synchrnous scan && we've made
3706 * any progress, sleep briefly and repeat.
3708 if (dev
!= last_failed_dev
) {
3710 last_failed_dev
= dev
;
3714 /* We might be failing to detect boot device, give it
3715 * a few more chances.
3723 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3726 queue_delayed_work(system_long_wq
, &ap
->hotplug_task
,
3727 round_jiffies_relative(HZ
));
3731 * ata_scsi_offline_dev - offline attached SCSI device
3732 * @dev: ATA device to offline attached SCSI device for
3734 * This function is called from ata_eh_hotplug() and responsible
3735 * for taking the SCSI device attached to @dev offline. This
3736 * function is called with host lock which protects dev->sdev
3740 * spin_lock_irqsave(host lock)
3743 * 1 if attached SCSI device exists, 0 otherwise.
3745 int ata_scsi_offline_dev(struct ata_device
*dev
)
3748 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3755 * ata_scsi_remove_dev - remove attached SCSI device
3756 * @dev: ATA device to remove attached SCSI device for
3758 * This function is called from ata_eh_scsi_hotplug() and
3759 * responsible for removing the SCSI device attached to @dev.
3762 * Kernel thread context (may sleep).
3764 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3766 struct ata_port
*ap
= dev
->link
->ap
;
3767 struct scsi_device
*sdev
;
3768 unsigned long flags
;
3770 /* Alas, we need to grab scan_mutex to ensure SCSI device
3771 * state doesn't change underneath us and thus
3772 * scsi_device_get() always succeeds. The mutex locking can
3773 * be removed if there is __scsi_device_get() interface which
3774 * increments reference counts regardless of device state.
3776 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3777 spin_lock_irqsave(ap
->lock
, flags
);
3779 /* clearing dev->sdev is protected by host lock */
3784 /* If user initiated unplug races with us, sdev can go
3785 * away underneath us after the host lock and
3786 * scan_mutex are released. Hold onto it.
3788 if (scsi_device_get(sdev
) == 0) {
3789 /* The following ensures the attached sdev is
3790 * offline on return from ata_scsi_offline_dev()
3791 * regardless it wins or loses the race
3792 * against this function.
3794 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3801 spin_unlock_irqrestore(ap
->lock
, flags
);
3802 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3805 ata_dev_info(dev
, "detaching (SCSI %s)\n",
3806 dev_name(&sdev
->sdev_gendev
));
3808 scsi_remove_device(sdev
);
3809 scsi_device_put(sdev
);
3813 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3815 struct ata_port
*ap
= link
->ap
;
3816 struct ata_device
*dev
;
3818 ata_for_each_dev(dev
, link
, ALL
) {
3819 unsigned long flags
;
3821 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3824 spin_lock_irqsave(ap
->lock
, flags
);
3825 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3826 spin_unlock_irqrestore(ap
->lock
, flags
);
3828 if (zpodd_dev_enabled(dev
))
3831 ata_scsi_remove_dev(dev
);
3836 * ata_scsi_media_change_notify - send media change event
3837 * @dev: Pointer to the disk device with media change event
3839 * Tell the block layer to send a media change notification
3843 * spin_lock_irqsave(host lock)
3845 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3848 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3853 * ata_scsi_hotplug - SCSI part of hotplug
3854 * @work: Pointer to ATA port to perform SCSI hotplug on
3856 * Perform SCSI part of hotplug. It's executed from a separate
3857 * workqueue after EH completes. This is necessary because SCSI
3858 * hot plugging requires working EH and hot unplugging is
3859 * synchronized with hot plugging with a mutex.
3862 * Kernel thread context (may sleep).
3864 void ata_scsi_hotplug(struct work_struct
*work
)
3866 struct ata_port
*ap
=
3867 container_of(work
, struct ata_port
, hotplug_task
.work
);
3870 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3871 DPRINTK("ENTER/EXIT - unloading\n");
3876 mutex_lock(&ap
->scsi_scan_mutex
);
3878 /* Unplug detached devices. We cannot use link iterator here
3879 * because PMP links have to be scanned even if PMP is
3880 * currently not attached. Iterate manually.
3882 ata_scsi_handle_link_detach(&ap
->link
);
3884 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3885 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3887 /* scan for new ones */
3888 ata_scsi_scan_host(ap
, 0);
3890 mutex_unlock(&ap
->scsi_scan_mutex
);
3895 * ata_scsi_user_scan - indication for user-initiated bus scan
3896 * @shost: SCSI host to scan
3897 * @channel: Channel to scan
3901 * This function is called when user explicitly requests bus
3902 * scan. Set probe pending flag and invoke EH.
3905 * SCSI layer (we don't care)
3910 int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3911 unsigned int id
, unsigned int lun
)
3913 struct ata_port
*ap
= ata_shost_to_port(shost
);
3914 unsigned long flags
;
3917 if (!ap
->ops
->error_handler
)
3920 if (lun
!= SCAN_WILD_CARD
&& lun
)
3923 if (!sata_pmp_attached(ap
)) {
3924 if (channel
!= SCAN_WILD_CARD
&& channel
)
3928 if (id
!= SCAN_WILD_CARD
&& id
)
3933 spin_lock_irqsave(ap
->lock
, flags
);
3935 if (devno
== SCAN_WILD_CARD
) {
3936 struct ata_link
*link
;
3938 ata_for_each_link(link
, ap
, EDGE
) {
3939 struct ata_eh_info
*ehi
= &link
->eh_info
;
3940 ehi
->probe_mask
|= ATA_ALL_DEVICES
;
3941 ehi
->action
|= ATA_EH_RESET
;
3944 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3947 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3948 ehi
->probe_mask
|= 1 << dev
->devno
;
3949 ehi
->action
|= ATA_EH_RESET
;
3955 ata_port_schedule_eh(ap
);
3956 spin_unlock_irqrestore(ap
->lock
, flags
);
3957 ata_port_wait_eh(ap
);
3959 spin_unlock_irqrestore(ap
->lock
, flags
);
3965 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3966 * @work: Pointer to ATA port to perform scsi_rescan_device()
3968 * After ATA pass thru (SAT) commands are executed successfully,
3969 * libata need to propagate the changes to SCSI layer.
3972 * Kernel thread context (may sleep).
3974 void ata_scsi_dev_rescan(struct work_struct
*work
)
3976 struct ata_port
*ap
=
3977 container_of(work
, struct ata_port
, scsi_rescan_task
);
3978 struct ata_link
*link
;
3979 struct ata_device
*dev
;
3980 unsigned long flags
;
3982 mutex_lock(&ap
->scsi_scan_mutex
);
3983 spin_lock_irqsave(ap
->lock
, flags
);
3985 ata_for_each_link(link
, ap
, EDGE
) {
3986 ata_for_each_dev(dev
, link
, ENABLED
) {
3987 struct scsi_device
*sdev
= dev
->sdev
;
3991 if (scsi_device_get(sdev
))
3994 spin_unlock_irqrestore(ap
->lock
, flags
);
3995 scsi_rescan_device(&(sdev
->sdev_gendev
));
3996 scsi_device_put(sdev
);
3997 spin_lock_irqsave(ap
->lock
, flags
);
4001 spin_unlock_irqrestore(ap
->lock
, flags
);
4002 mutex_unlock(&ap
->scsi_scan_mutex
);
4006 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4007 * @host: ATA host container for all SAS ports
4008 * @port_info: Information from low-level host driver
4009 * @shost: SCSI host that the scsi device is attached to
4012 * PCI/etc. bus probe sem.
4015 * ata_port pointer on success / NULL on failure.
4018 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
4019 struct ata_port_info
*port_info
,
4020 struct Scsi_Host
*shost
)
4022 struct ata_port
*ap
;
4024 ap
= ata_port_alloc(host
);
4029 ap
->lock
= &host
->lock
;
4030 ap
->pio_mask
= port_info
->pio_mask
;
4031 ap
->mwdma_mask
= port_info
->mwdma_mask
;
4032 ap
->udma_mask
= port_info
->udma_mask
;
4033 ap
->flags
|= port_info
->flags
;
4034 ap
->ops
= port_info
->port_ops
;
4035 ap
->cbl
= ATA_CBL_SATA
;
4039 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
4042 * ata_sas_port_start - Set port up for dma.
4043 * @ap: Port to initialize
4045 * Called just after data structures for each port are
4048 * May be used as the port_start() entry in ata_port_operations.
4051 * Inherited from caller.
4053 int ata_sas_port_start(struct ata_port
*ap
)
4056 * the port is marked as frozen at allocation time, but if we don't
4057 * have new eh, we won't thaw it
4059 if (!ap
->ops
->error_handler
)
4060 ap
->pflags
&= ~ATA_PFLAG_FROZEN
;
4063 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
4066 * ata_port_stop - Undo ata_sas_port_start()
4067 * @ap: Port to shut down
4069 * May be used as the port_stop() entry in ata_port_operations.
4072 * Inherited from caller.
4075 void ata_sas_port_stop(struct ata_port
*ap
)
4078 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
4081 * ata_sas_async_probe - simply schedule probing and return
4082 * @ap: Port to probe
4084 * For batch scheduling of probe for sas attached ata devices, assumes
4085 * the port has already been through ata_sas_port_init()
4087 void ata_sas_async_probe(struct ata_port
*ap
)
4089 __ata_port_probe(ap
);
4091 EXPORT_SYMBOL_GPL(ata_sas_async_probe
);
4093 int ata_sas_sync_probe(struct ata_port
*ap
)
4095 return ata_port_probe(ap
);
4097 EXPORT_SYMBOL_GPL(ata_sas_sync_probe
);
4101 * ata_sas_port_init - Initialize a SATA device
4102 * @ap: SATA port to initialize
4105 * PCI/etc. bus probe sem.
4108 * Zero on success, non-zero on error.
4111 int ata_sas_port_init(struct ata_port
*ap
)
4113 int rc
= ap
->ops
->port_start(ap
);
4117 ap
->print_id
= atomic_inc_return(&ata_print_id
);
4120 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
4123 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4124 * @ap: SATA port to destroy
4128 void ata_sas_port_destroy(struct ata_port
*ap
)
4130 if (ap
->ops
->port_stop
)
4131 ap
->ops
->port_stop(ap
);
4134 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
4137 * ata_sas_slave_configure - Default slave_config routine for libata devices
4138 * @sdev: SCSI device to configure
4139 * @ap: ATA port to which SCSI device is attached
4145 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
4147 ata_scsi_sdev_config(sdev
);
4148 ata_scsi_dev_config(sdev
, ap
->link
.device
);
4151 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
4154 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4155 * @cmd: SCSI command to be sent
4156 * @ap: ATA port to which the command is being sent
4159 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4163 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, struct ata_port
*ap
)
4167 ata_scsi_dump_cdb(ap
, cmd
);
4169 if (likely(ata_dev_enabled(ap
->link
.device
)))
4170 rc
= __ata_scsi_queuecmd(cmd
, ap
->link
.device
);
4172 cmd
->result
= (DID_BAD_TARGET
<< 16);
4173 cmd
->scsi_done(cmd
);
4177 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);