2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <linux/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
);
56 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
57 const struct scsi_device
*scsidev
);
58 static struct ata_device
*ata_scsi_find_dev(struct ata_port
*ap
,
59 const struct scsi_device
*scsidev
);
60 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
61 unsigned int id
, unsigned int lun
);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage
[RW_RECOVERY_MPAGE_LEN
] = {
76 RW_RECOVERY_MPAGE_LEN
- 2,
78 0, /* read retry count */
80 0, /* write retry count */
84 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
87 0, /* contains WCE, needs to be 0 for logic */
88 0, 0, 0, 0, 0, 0, 0, 0, 0,
89 0, /* contains DRA, needs to be 0 for logic */
93 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
95 CONTROL_MPAGE_LEN
- 2,
96 2, /* DSENSE=0, GLTSD=1 */
97 0, /* [QAM+QERR may be 1, see 05-359r1] */
98 0, 0, 0, 0, 0xff, 0xff,
99 0, 30 /* extended self test time, see 05-359r1 */
103 * libata transport template. libata doesn't do real transport stuff.
104 * It just needs the eh_timed_out hook.
106 static struct scsi_transport_template ata_scsi_transport_template
= {
107 .eh_strategy_handler
= ata_scsi_error
,
108 .eh_timed_out
= ata_scsi_timed_out
,
109 .user_scan
= ata_scsi_user_scan
,
113 static const struct {
116 } link_pm_policy
[] = {
117 { NOT_AVAILABLE
, "max_performance" },
118 { MIN_POWER
, "min_power" },
119 { MAX_PERFORMANCE
, "max_performance" },
120 { MEDIUM_POWER
, "medium_power" },
123 static const char *ata_scsi_lpm_get(enum link_pm policy
)
127 for (i
= 0; i
< ARRAY_SIZE(link_pm_policy
); i
++)
128 if (link_pm_policy
[i
].value
== policy
)
129 return link_pm_policy
[i
].name
;
134 static ssize_t
ata_scsi_lpm_put(struct class_device
*class_dev
,
135 const char *buf
, size_t count
)
137 struct Scsi_Host
*shost
= class_to_shost(class_dev
);
138 struct ata_port
*ap
= ata_shost_to_port(shost
);
139 enum link_pm policy
= 0;
143 * we are skipping array location 0 on purpose - this
144 * is because a value of NOT_AVAILABLE is displayed
145 * to the user as max_performance, but when the user
146 * writes "max_performance", they actually want the
147 * value to match MAX_PERFORMANCE.
149 for (i
= 1; i
< ARRAY_SIZE(link_pm_policy
); i
++) {
150 const int len
= strlen(link_pm_policy
[i
].name
);
151 if (strncmp(link_pm_policy
[i
].name
, buf
, len
) == 0 &&
153 policy
= link_pm_policy
[i
].value
;
160 ata_lpm_schedule(ap
, policy
);
165 ata_scsi_lpm_show(struct class_device
*class_dev
, char *buf
)
167 struct Scsi_Host
*shost
= class_to_shost(class_dev
);
168 struct ata_port
*ap
= ata_shost_to_port(shost
);
170 ata_scsi_lpm_get(ap
->pm_policy
);
175 return snprintf(buf
, 23, "%s\n", policy
);
177 CLASS_DEVICE_ATTR(link_power_management_policy
, S_IRUGO
| S_IWUSR
,
178 ata_scsi_lpm_show
, ata_scsi_lpm_put
);
179 EXPORT_SYMBOL_GPL(class_device_attr_link_power_management_policy
);
181 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
182 void (*done
)(struct scsi_cmnd
*))
184 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
185 /* "Invalid field in cbd" */
190 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
191 * @sdev: SCSI device for which BIOS geometry is to be determined
192 * @bdev: block device associated with @sdev
193 * @capacity: capacity of SCSI device
194 * @geom: location to which geometry will be output
196 * Generic bios head/sector/cylinder calculator
197 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
198 * mapping. Some situations may arise where the disk is not
199 * bootable if this is not used.
202 * Defined by the SCSI layer. We don't really care.
207 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
208 sector_t capacity
, int geom
[])
212 sector_div(capacity
, 255*63);
219 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
220 * @sdev: SCSI device to get identify data for
221 * @arg: User buffer area for identify data
224 * Defined by the SCSI layer. We don't really care.
227 * Zero on success, negative errno on error.
229 static int ata_get_identity(struct scsi_device
*sdev
, void __user
*arg
)
231 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
232 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
233 u16 __user
*dst
= arg
;
239 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
242 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
243 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
246 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
247 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
250 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
251 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
258 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
259 * @scsidev: Device to which we are issuing command
260 * @arg: User provided data for issuing command
263 * Defined by the SCSI layer. We don't really care.
266 * Zero on success, negative errno on error.
268 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
271 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
272 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
274 enum dma_data_direction data_dir
;
280 if (copy_from_user(args
, arg
, sizeof(args
)))
283 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
287 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
290 argsize
= SECTOR_SIZE
* args
[3];
291 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
292 if (argbuf
== NULL
) {
297 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
298 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
299 block count in sector count field */
300 data_dir
= DMA_FROM_DEVICE
;
302 scsi_cmd
[1] = (3 << 1); /* Non-data */
303 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
307 scsi_cmd
[0] = ATA_16
;
309 scsi_cmd
[4] = args
[2];
310 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
311 scsi_cmd
[6] = args
[3];
312 scsi_cmd
[8] = args
[1];
316 scsi_cmd
[6] = args
[1];
318 scsi_cmd
[14] = args
[0];
320 /* Good values for timeout and retries? Values below
321 from scsi_ioctl_send_command() for default case... */
322 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
323 sensebuf
, (10*HZ
), 5, 0);
325 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
326 u8
*desc
= sensebuf
+ 8;
327 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
329 /* If we set cc then ATA pass-through will cause a
330 * check condition even if no error. Filter that. */
331 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
332 struct scsi_sense_hdr sshdr
;
333 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
335 if (sshdr
.sense_key
== 0 &&
336 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
337 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
340 /* Send userspace a few ATA registers (same as drivers/ide) */
341 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
342 desc
[0] == 0x09) { /* code is "ATA Descriptor" */
343 args
[0] = desc
[13]; /* status */
344 args
[1] = desc
[3]; /* error */
345 args
[2] = desc
[5]; /* sector count (0:7) */
346 if (copy_to_user(arg
, args
, sizeof(args
)))
358 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
367 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
368 * @scsidev: Device to which we are issuing command
369 * @arg: User provided data for issuing command
372 * Defined by the SCSI layer. We don't really care.
375 * Zero on success, negative errno on error.
377 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
380 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
381 u8 args
[7], *sensebuf
= NULL
;
387 if (copy_from_user(args
, arg
, sizeof(args
)))
390 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
394 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
395 scsi_cmd
[0] = ATA_16
;
396 scsi_cmd
[1] = (3 << 1); /* Non-data */
397 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
398 scsi_cmd
[4] = args
[1];
399 scsi_cmd
[6] = args
[2];
400 scsi_cmd
[8] = args
[3];
401 scsi_cmd
[10] = args
[4];
402 scsi_cmd
[12] = args
[5];
403 scsi_cmd
[13] = args
[6] & 0x4f;
404 scsi_cmd
[14] = args
[0];
406 /* Good values for timeout and retries? Values below
407 from scsi_ioctl_send_command() for default case... */
408 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
409 sensebuf
, (10*HZ
), 5, 0);
411 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
412 u8
*desc
= sensebuf
+ 8;
413 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
415 /* If we set cc then ATA pass-through will cause a
416 * check condition even if no error. Filter that. */
417 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
418 struct scsi_sense_hdr sshdr
;
419 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
421 if (sshdr
.sense_key
== 0 &&
422 sshdr
.asc
== 0 && sshdr
.ascq
== 0)
423 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
426 /* Send userspace ATA registers */
427 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
428 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
429 args
[0] = desc
[13]; /* status */
430 args
[1] = desc
[3]; /* error */
431 args
[2] = desc
[5]; /* sector count (0:7) */
432 args
[3] = desc
[7]; /* lbal */
433 args
[4] = desc
[9]; /* lbam */
434 args
[5] = desc
[11]; /* lbah */
435 args
[6] = desc
[12]; /* select */
436 if (copy_to_user(arg
, args
, sizeof(args
)))
451 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
453 int val
= -EINVAL
, rc
= -EINVAL
;
456 case ATA_IOC_GET_IO32
:
458 if (copy_to_user(arg
, &val
, 1))
462 case ATA_IOC_SET_IO32
:
463 val
= (unsigned long) arg
;
468 case HDIO_GET_IDENTITY
:
469 return ata_get_identity(scsidev
, arg
);
472 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
474 return ata_cmd_ioctl(scsidev
, arg
);
476 case HDIO_DRIVE_TASK
:
477 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
479 return ata_task_ioctl(scsidev
, arg
);
490 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
491 * @dev: ATA device to which the new command is attached
492 * @cmd: SCSI command that originated this ATA command
493 * @done: SCSI command completion function
495 * Obtain a reference to an unused ata_queued_cmd structure,
496 * which is the basic libata structure representing a single
497 * ATA command sent to the hardware.
499 * If a command was available, fill in the SCSI-specific
500 * portions of the structure with information on the
504 * spin_lock_irqsave(host lock)
507 * Command allocated, or %NULL if none available.
509 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
510 struct scsi_cmnd
*cmd
,
511 void (*done
)(struct scsi_cmnd
*))
513 struct ata_queued_cmd
*qc
;
515 qc
= ata_qc_new_init(dev
);
520 qc
->sg
= scsi_sglist(cmd
);
521 qc
->n_elem
= scsi_sg_count(cmd
);
523 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
531 * ata_dump_status - user friendly display of error info
532 * @id: id of the port in question
533 * @tf: ptr to filled out taskfile
535 * Decode and dump the ATA error/status registers for the user so
536 * that they have some idea what really happened at the non
537 * make-believe layer.
540 * inherited from caller
542 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
544 u8 stat
= tf
->command
, err
= tf
->feature
;
546 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
547 if (stat
& ATA_BUSY
) {
548 printk("Busy }\n"); /* Data is not valid in this case */
550 if (stat
& 0x40) printk("DriveReady ");
551 if (stat
& 0x20) printk("DeviceFault ");
552 if (stat
& 0x10) printk("SeekComplete ");
553 if (stat
& 0x08) printk("DataRequest ");
554 if (stat
& 0x04) printk("CorrectedError ");
555 if (stat
& 0x02) printk("Index ");
556 if (stat
& 0x01) printk("Error ");
560 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
561 if (err
& 0x04) printk("DriveStatusError ");
563 if (err
& 0x04) printk("BadCRC ");
564 else printk("Sector ");
566 if (err
& 0x40) printk("UncorrectableError ");
567 if (err
& 0x10) printk("SectorIdNotFound ");
568 if (err
& 0x02) printk("TrackZeroNotFound ");
569 if (err
& 0x01) printk("AddrMarkNotFound ");
576 * ata_to_sense_error - convert ATA error to SCSI error
577 * @id: ATA device number
578 * @drv_stat: value contained in ATA status register
579 * @drv_err: value contained in ATA error register
580 * @sk: the sense key we'll fill out
581 * @asc: the additional sense code we'll fill out
582 * @ascq: the additional sense code qualifier we'll fill out
583 * @verbose: be verbose
585 * Converts an ATA error into a SCSI error. Fill out pointers to
586 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
587 * format sense blocks.
590 * spin_lock_irqsave(host lock)
592 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
593 u8
*asc
, u8
*ascq
, int verbose
)
597 /* Based on the 3ware driver translation table */
598 static const unsigned char sense_table
[][4] = {
600 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
602 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
604 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
605 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
606 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
607 /* MC|ID|ABRT|TRK0|MARK */
608 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
610 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
611 /* Bad address mark */
612 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
614 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
616 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
617 /* Media change request */
618 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
620 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
622 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
624 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
625 /* BBD - block marked bad */
626 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
627 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
629 static const unsigned char stat_table
[][4] = {
630 /* Must be first because BUSY means no other bits valid */
631 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
632 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
633 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
634 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
635 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
639 * Is this an error we can process/parse
641 if (drv_stat
& ATA_BUSY
) {
642 drv_err
= 0; /* Ignore the err bits, they're invalid */
646 /* Look for drv_err */
647 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
648 /* Look for best matches first */
649 if ((sense_table
[i
][0] & drv_err
) ==
651 *sk
= sense_table
[i
][1];
652 *asc
= sense_table
[i
][2];
653 *ascq
= sense_table
[i
][3];
657 /* No immediate match */
659 printk(KERN_WARNING
"ata%u: no sense translation for "
660 "error 0x%02x\n", id
, drv_err
);
663 /* Fall back to interpreting status bits */
664 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
665 if (stat_table
[i
][0] & drv_stat
) {
666 *sk
= stat_table
[i
][1];
667 *asc
= stat_table
[i
][2];
668 *ascq
= stat_table
[i
][3];
672 /* No error? Undecoded? */
674 printk(KERN_WARNING
"ata%u: no sense translation for "
675 "status: 0x%02x\n", id
, drv_stat
);
677 /* We need a sensible error return here, which is tricky, and one
678 that won't cause people to do things like return a disk wrongly */
679 *sk
= ABORTED_COMMAND
;
685 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
686 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
687 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
692 * ata_gen_passthru_sense - Generate check condition sense block.
693 * @qc: Command that completed.
695 * This function is specific to the ATA descriptor format sense
696 * block specified for the ATA pass through commands. Regardless
697 * of whether the command errored or not, return a sense
698 * block. Copy all controller registers into the sense
699 * block. Clear sense key, ASC & ASCQ if there is no error.
704 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
706 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
707 struct ata_taskfile
*tf
= &qc
->result_tf
;
708 unsigned char *sb
= cmd
->sense_buffer
;
709 unsigned char *desc
= sb
+ 8;
710 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
712 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
714 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
717 * Use ata_to_sense_error() to map status register bits
718 * onto sense key, asc & ascq.
721 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
722 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
723 &sb
[1], &sb
[2], &sb
[3], verbose
);
728 * Sense data is current and format is descriptor.
734 /* set length of additional sense data */
739 * Copy registers into sense buffer.
742 desc
[3] = tf
->feature
; /* == error reg */
747 desc
[12] = tf
->device
;
748 desc
[13] = tf
->command
; /* == status reg */
751 * Fill in Extend bit, and the high order bytes
754 if (tf
->flags
& ATA_TFLAG_LBA48
) {
756 desc
[4] = tf
->hob_nsect
;
757 desc
[6] = tf
->hob_lbal
;
758 desc
[8] = tf
->hob_lbam
;
759 desc
[10] = tf
->hob_lbah
;
764 * ata_gen_ata_sense - generate a SCSI fixed sense block
765 * @qc: Command that we are erroring out
767 * Generate sense block for a failed ATA command @qc. Descriptor
768 * format is used to accomodate LBA48 block address.
773 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
775 struct ata_device
*dev
= qc
->dev
;
776 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
777 struct ata_taskfile
*tf
= &qc
->result_tf
;
778 unsigned char *sb
= cmd
->sense_buffer
;
779 unsigned char *desc
= sb
+ 8;
780 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
783 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
785 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
787 /* sense data is current and format is descriptor */
790 /* Use ata_to_sense_error() to map status register bits
791 * onto sense key, asc & ascq.
794 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
795 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
796 &sb
[1], &sb
[2], &sb
[3], verbose
);
800 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
802 /* information sense data descriptor */
807 desc
[2] |= 0x80; /* valid */
808 desc
[6] = block
>> 40;
809 desc
[7] = block
>> 32;
810 desc
[8] = block
>> 24;
811 desc
[9] = block
>> 16;
812 desc
[10] = block
>> 8;
816 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
818 sdev
->use_10_for_rw
= 1;
819 sdev
->use_10_for_ms
= 1;
821 /* Schedule policy is determined by ->qc_defer() callback and
822 * it needs to see every deferred qc. Set dev_blocked to 1 to
823 * prevent SCSI midlayer from automatically deferring
826 sdev
->max_device_blocked
= 1;
829 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
830 static void ata_scsi_dev_config(struct scsi_device
*sdev
,
831 struct ata_device
*dev
)
834 * atapi_drain_needed - Check whether data transfer may overflow
835 * @rq: request to be checked
837 * ATAPI commands which transfer variable length data to host
838 * might overflow due to application error or hardare bug. This
839 * function checks whether overflow should be drained and ignored
846 * 1 if ; otherwise, 0.
848 static int atapi_drain_needed(struct request
*rq
)
850 if (likely(!blk_pc_request(rq
)))
853 if (!rq
->data_len
|| (rq
->cmd_flags
& REQ_RW
))
856 return atapi_cmd_type(rq
->cmd
[0]) == ATAPI_MISC
;
859 static int ata_scsi_dev_config(struct scsi_device
*sdev
,
860 struct ata_device
*dev
)
861 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
863 /* configure max sectors */
864 blk_queue_max_sectors(sdev
->request_queue
, dev
->max_sectors
);
866 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
867 /* SATA DMA transfers must be multiples of 4 byte, so
868 * we need to pad ATAPI transfers using an extra sg.
869 * Decrement max hw segments accordingly.
872 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
873 if (dev
->class == ATA_DEV_ATAPI
) {
874 struct request_queue
*q
= sdev
->request_queue
;
875 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
876 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
879 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
881 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
882 /* set the min alignment */
884 /* set the min alignment and padding */
885 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
886 blk_queue_update_dma_alignment(sdev
->request_queue
,
888 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
891 blk_queue_dma_pad(sdev
->request_queue
, ATA_DMA_PAD_SZ
- 1);
893 /* configure draining */
894 buf
= kmalloc(ATAPI_MAX_DRAIN
, q
->bounce_gfp
| GFP_KERNEL
);
896 ata_dev_printk(dev
, KERN_ERR
,
897 "drain buffer allocation failed\n");
901 blk_queue_dma_drain(q
, atapi_drain_needed
, buf
, ATAPI_MAX_DRAIN
);
903 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
904 /* ATA devices must be sector aligned */
905 blk_queue_update_dma_alignment(sdev
->request_queue
,
907 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
909 if (dev
->class == ATA_DEV_ATA
)
911 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
912 sdev
->manage_start_stop
= 1;
913 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
916 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
918 if (dev
->flags
& ATA_DFLAG_AN
)
919 set_bit(SDEV_EVT_MEDIA_CHANGE
, sdev
->supported_events
);
921 if (dev
->flags
& ATA_DFLAG_NCQ
) {
924 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
925 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
926 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
928 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
932 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
936 * ata_scsi_slave_config - Set SCSI device attributes
937 * @sdev: SCSI device to examine
939 * This is called before we actually start reading
940 * and writing to the device, to configure certain
941 * SCSI mid-layer behaviors.
944 * Defined by SCSI layer. We don't really care.
947 int ata_scsi_slave_config(struct scsi_device
*sdev
)
949 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
950 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
951 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
954 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
956 ata_scsi_sdev_config(sdev
);
959 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
960 ata_scsi_dev_config(sdev
, dev
);
962 rc
= ata_scsi_dev_config(sdev
, dev
);
963 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
965 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
969 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
973 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
974 * @sdev: SCSI device to be destroyed
976 * @sdev is about to be destroyed for hot/warm unplugging. If
977 * this unplugging was initiated by libata as indicated by NULL
978 * dev->sdev, this function doesn't have to do anything.
979 * Otherwise, SCSI layer initiated warm-unplug is in progress.
980 * Clear dev->sdev, schedule the device for ATA detach and invoke
984 * Defined by SCSI layer. We don't really care.
986 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
988 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
989 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
991 struct request_queue
*q
= sdev
->request_queue
;
992 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
994 struct ata_device
*dev
;
996 if (!ap
->ops
->error_handler
)
999 spin_lock_irqsave(ap
->lock
, flags
);
1000 dev
= __ata_scsi_find_dev(ap
, sdev
);
1001 if (dev
&& dev
->sdev
) {
1002 /* SCSI device already in CANCEL state, no need to offline it */
1004 dev
->flags
|= ATA_DFLAG_DETACH
;
1005 ata_port_schedule_eh(ap
);
1007 spin_unlock_irqrestore(ap
->lock
, flags
);
1008 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
1011 kfree(q
->dma_drain_buffer
);
1012 q
->dma_drain_buffer
= NULL
;
1013 q
->dma_drain_size
= 0;
1014 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
1018 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1019 * @sdev: SCSI device to configure queue depth for
1020 * @queue_depth: new queue depth
1022 * This is libata standard hostt->change_queue_depth callback.
1023 * SCSI will call into this callback when user tries to set queue
1027 * SCSI layer (we don't care)
1030 * Newly configured queue depth.
1032 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
1034 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
1035 struct ata_device
*dev
;
1036 unsigned long flags
;
1038 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
1039 return sdev
->queue_depth
;
1041 dev
= ata_scsi_find_dev(ap
, sdev
);
1042 if (!dev
|| !ata_dev_enabled(dev
))
1043 return sdev
->queue_depth
;
1046 spin_lock_irqsave(ap
->lock
, flags
);
1047 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
1048 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
1049 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
1052 spin_unlock_irqrestore(ap
->lock
, flags
);
1054 /* limit and apply queue depth */
1055 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
1056 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
1057 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
1059 if (sdev
->queue_depth
== queue_depth
)
1062 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
1066 /* XXX: for spindown warning */
1067 static void ata_delayed_done_timerfn(unsigned long arg
)
1069 struct scsi_cmnd
*scmd
= (void *)arg
;
1071 scmd
->scsi_done(scmd
);
1074 /* XXX: for spindown warning */
1075 static void ata_delayed_done(struct scsi_cmnd
*scmd
)
1077 static struct timer_list timer
;
1079 setup_timer(&timer
, ata_delayed_done_timerfn
, (unsigned long)scmd
);
1080 mod_timer(&timer
, jiffies
+ 5 * HZ
);
1084 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1085 * @qc: Storage for translated ATA taskfile
1087 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1088 * (to start). Perhaps these commands should be preceded by
1089 * CHECK POWER MODE to see what power mode the device is already in.
1090 * [See SAT revision 5 at www.t10.org]
1093 * spin_lock_irqsave(host lock)
1096 * Zero on success, non-zero on error.
1098 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
1100 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1101 struct ata_taskfile
*tf
= &qc
->tf
;
1102 const u8
*cdb
= scmd
->cmnd
;
1104 if (scmd
->cmd_len
< 5)
1107 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
1108 tf
->protocol
= ATA_PROT_NODATA
;
1110 ; /* ignore IMMED bit, violates sat-r05 */
1113 goto invalid_fld
; /* LOEJ bit set not supported */
1114 if (((cdb
[4] >> 4) & 0xf) != 0)
1115 goto invalid_fld
; /* power conditions not supported */
1117 if (qc
->dev
->horkage
& ATA_HORKAGE_SKIP_PM
) {
1118 /* the device lacks PM support, finish without doing anything */
1119 scmd
->result
= SAM_STAT_GOOD
;
1124 tf
->nsect
= 1; /* 1 sector, lba=0 */
1126 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
1127 tf
->flags
|= ATA_TFLAG_LBA
;
1132 tf
->device
|= ATA_LBA
;
1135 tf
->lbal
= 0x1; /* sect */
1136 tf
->lbam
= 0x0; /* cyl low */
1137 tf
->lbah
= 0x0; /* cyl high */
1140 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
1142 /* XXX: This is for backward compatibility, will be
1143 * removed. Read Documentation/feature-removal-schedule.txt
1146 if ((qc
->dev
->flags
& ATA_DFLAG_SPUNDOWN
) &&
1147 (system_state
== SYSTEM_HALT
||
1148 system_state
== SYSTEM_POWER_OFF
)) {
1149 static unsigned long warned
;
1151 if (!test_and_set_bit(0, &warned
)) {
1152 ata_dev_printk(qc
->dev
, KERN_WARNING
,
1153 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1154 "UPDATE SHUTDOWN UTILITY\n");
1155 ata_dev_printk(qc
->dev
, KERN_WARNING
,
1156 "For more info, visit "
1157 "http://linux-ata.org/shutdown.html\n");
1159 /* ->scsi_done is not used, use it for
1160 * delayed completion.
1162 scmd
->scsi_done
= qc
->scsidone
;
1163 qc
->scsidone
= ata_delayed_done
;
1165 scmd
->result
= SAM_STAT_GOOD
;
1169 /* Issue ATA STANDBY IMMEDIATE command */
1170 tf
->command
= ATA_CMD_STANDBYNOW1
;
1174 * Standby and Idle condition timers could be implemented but that
1175 * would require libata to implement the Power condition mode page
1176 * and allow the user to change it. Changing mode pages requires
1177 * MODE SELECT to be implemented.
1183 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1184 /* "Invalid field in cbd" */
1190 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1191 * @qc: Storage for translated ATA taskfile
1193 * Sets up an ATA taskfile to issue FLUSH CACHE or
1197 * spin_lock_irqsave(host lock)
1200 * Zero on success, non-zero on error.
1202 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1204 struct ata_taskfile
*tf
= &qc
->tf
;
1206 tf
->flags
|= ATA_TFLAG_DEVICE
;
1207 tf
->protocol
= ATA_PROT_NODATA
;
1209 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1210 tf
->command
= ATA_CMD_FLUSH_EXT
;
1212 tf
->command
= ATA_CMD_FLUSH
;
1214 /* flush is critical for IO integrity, consider it an IO command */
1215 qc
->flags
|= ATA_QCFLAG_IO
;
1221 * scsi_6_lba_len - Get LBA and transfer length
1222 * @cdb: SCSI command to translate
1224 * Calculate LBA and transfer length for 6-byte commands.
1228 * @plen: the transfer length
1230 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1235 VPRINTK("six-byte command\n");
1237 lba
|= ((u64
)(cdb
[1] & 0x1f)) << 16;
1238 lba
|= ((u64
)cdb
[2]) << 8;
1239 lba
|= ((u64
)cdb
[3]);
1248 * scsi_10_lba_len - Get LBA and transfer length
1249 * @cdb: SCSI command to translate
1251 * Calculate LBA and transfer length for 10-byte commands.
1255 * @plen: the transfer length
1257 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1262 VPRINTK("ten-byte command\n");
1264 lba
|= ((u64
)cdb
[2]) << 24;
1265 lba
|= ((u64
)cdb
[3]) << 16;
1266 lba
|= ((u64
)cdb
[4]) << 8;
1267 lba
|= ((u64
)cdb
[5]);
1269 len
|= ((u32
)cdb
[7]) << 8;
1270 len
|= ((u32
)cdb
[8]);
1277 * scsi_16_lba_len - Get LBA and transfer length
1278 * @cdb: SCSI command to translate
1280 * Calculate LBA and transfer length for 16-byte commands.
1284 * @plen: the transfer length
1286 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1291 VPRINTK("sixteen-byte command\n");
1293 lba
|= ((u64
)cdb
[2]) << 56;
1294 lba
|= ((u64
)cdb
[3]) << 48;
1295 lba
|= ((u64
)cdb
[4]) << 40;
1296 lba
|= ((u64
)cdb
[5]) << 32;
1297 lba
|= ((u64
)cdb
[6]) << 24;
1298 lba
|= ((u64
)cdb
[7]) << 16;
1299 lba
|= ((u64
)cdb
[8]) << 8;
1300 lba
|= ((u64
)cdb
[9]);
1302 len
|= ((u32
)cdb
[10]) << 24;
1303 len
|= ((u32
)cdb
[11]) << 16;
1304 len
|= ((u32
)cdb
[12]) << 8;
1305 len
|= ((u32
)cdb
[13]);
1312 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1313 * @qc: Storage for translated ATA taskfile
1315 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1318 * spin_lock_irqsave(host lock)
1321 * Zero on success, non-zero on error.
1323 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1325 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1326 struct ata_taskfile
*tf
= &qc
->tf
;
1327 struct ata_device
*dev
= qc
->dev
;
1328 u64 dev_sectors
= qc
->dev
->n_sectors
;
1329 const u8
*cdb
= scmd
->cmnd
;
1333 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1334 tf
->protocol
= ATA_PROT_NODATA
;
1336 if (cdb
[0] == VERIFY
) {
1337 if (scmd
->cmd_len
< 10)
1339 scsi_10_lba_len(cdb
, &block
, &n_block
);
1340 } else if (cdb
[0] == VERIFY_16
) {
1341 if (scmd
->cmd_len
< 16)
1343 scsi_16_lba_len(cdb
, &block
, &n_block
);
1349 if (block
>= dev_sectors
)
1351 if ((block
+ n_block
) > dev_sectors
)
1354 if (dev
->flags
& ATA_DFLAG_LBA
) {
1355 tf
->flags
|= ATA_TFLAG_LBA
;
1357 if (lba_28_ok(block
, n_block
)) {
1359 tf
->command
= ATA_CMD_VERIFY
;
1360 tf
->device
|= (block
>> 24) & 0xf;
1361 } else if (lba_48_ok(block
, n_block
)) {
1362 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1366 tf
->flags
|= ATA_TFLAG_LBA48
;
1367 tf
->command
= ATA_CMD_VERIFY_EXT
;
1369 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1371 tf
->hob_lbah
= (block
>> 40) & 0xff;
1372 tf
->hob_lbam
= (block
>> 32) & 0xff;
1373 tf
->hob_lbal
= (block
>> 24) & 0xff;
1375 /* request too large even for LBA48 */
1378 tf
->nsect
= n_block
& 0xff;
1380 tf
->lbah
= (block
>> 16) & 0xff;
1381 tf
->lbam
= (block
>> 8) & 0xff;
1382 tf
->lbal
= block
& 0xff;
1384 tf
->device
|= ATA_LBA
;
1387 u32 sect
, head
, cyl
, track
;
1389 if (!lba_28_ok(block
, n_block
))
1392 /* Convert LBA to CHS */
1393 track
= (u32
)block
/ dev
->sectors
;
1394 cyl
= track
/ dev
->heads
;
1395 head
= track
% dev
->heads
;
1396 sect
= (u32
)block
% dev
->sectors
+ 1;
1398 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1399 (u32
)block
, track
, cyl
, head
, sect
);
1401 /* Check whether the converted CHS can fit.
1405 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1408 tf
->command
= ATA_CMD_VERIFY
;
1409 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1412 tf
->lbah
= cyl
>> 8;
1419 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1420 /* "Invalid field in cbd" */
1424 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1425 /* "Logical Block Address out of range" */
1429 scmd
->result
= SAM_STAT_GOOD
;
1434 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1435 * @qc: Storage for translated ATA taskfile
1437 * Converts any of six SCSI read/write commands into the
1438 * ATA counterpart, including starting sector (LBA),
1439 * sector count, and taking into account the device's LBA48
1442 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1443 * %WRITE_16 are currently supported.
1446 * spin_lock_irqsave(host lock)
1449 * Zero on success, non-zero on error.
1451 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1453 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1454 const u8
*cdb
= scmd
->cmnd
;
1455 unsigned int tf_flags
= 0;
1460 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1461 tf_flags
|= ATA_TFLAG_WRITE
;
1463 /* Calculate the SCSI LBA, transfer length and FUA. */
1467 if (unlikely(scmd
->cmd_len
< 10))
1469 scsi_10_lba_len(cdb
, &block
, &n_block
);
1470 if (unlikely(cdb
[1] & (1 << 3)))
1471 tf_flags
|= ATA_TFLAG_FUA
;
1475 if (unlikely(scmd
->cmd_len
< 6))
1477 scsi_6_lba_len(cdb
, &block
, &n_block
);
1479 /* for 6-byte r/w commands, transfer length 0
1480 * means 256 blocks of data, not 0 block.
1487 if (unlikely(scmd
->cmd_len
< 16))
1489 scsi_16_lba_len(cdb
, &block
, &n_block
);
1490 if (unlikely(cdb
[1] & (1 << 3)))
1491 tf_flags
|= ATA_TFLAG_FUA
;
1494 DPRINTK("no-byte command\n");
1498 /* Check and compose ATA command */
1500 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1501 * length 0 means transfer 0 block of data.
1502 * However, for ATA R/W commands, sector count 0 means
1503 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1505 * WARNING: one or two older ATA drives treat 0 as 0...
1509 qc
->flags
|= ATA_QCFLAG_IO
;
1510 qc
->nbytes
= n_block
* ATA_SECT_SIZE
;
1512 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1514 if (likely(rc
== 0))
1519 /* treat all other errors as -EINVAL, fall through */
1521 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1522 /* "Invalid field in cbd" */
1526 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1527 /* "Logical Block Address out of range" */
1531 scmd
->result
= SAM_STAT_GOOD
;
1535 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1537 struct ata_port
*ap
= qc
->ap
;
1538 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1539 u8
*cdb
= cmd
->cmnd
;
1540 int need_sense
= (qc
->err_mask
!= 0);
1542 /* For ATA pass thru (SAT) commands, generate a sense block if
1543 * user mandated it or if there's an error. Note that if we
1544 * generate because the user forced us to, a check condition
1545 * is generated and the ATA register values are returned
1546 * whether the command completed successfully or not. If there
1547 * was no error, SK, ASC and ASCQ will all be zero.
1549 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1550 ((cdb
[2] & 0x20) || need_sense
)) {
1551 ata_gen_passthru_sense(qc
);
1554 cmd
->result
= SAM_STAT_GOOD
;
1556 /* TODO: decide which descriptor format to use
1557 * for 48b LBA devices and call that here
1558 * instead of the fixed desc, which is only
1559 * good for smaller LBA (and maybe CHS?)
1562 ata_gen_ata_sense(qc
);
1566 /* XXX: track spindown state for spindown skipping and warning */
1567 if (unlikely(qc
->tf
.command
== ATA_CMD_STANDBY
||
1568 qc
->tf
.command
== ATA_CMD_STANDBYNOW1
))
1569 qc
->dev
->flags
|= ATA_DFLAG_SPUNDOWN
;
1570 else if (likely(system_state
!= SYSTEM_HALT
&&
1571 system_state
!= SYSTEM_POWER_OFF
))
1572 qc
->dev
->flags
&= ~ATA_DFLAG_SPUNDOWN
;
1574 if (need_sense
&& !ap
->ops
->error_handler
)
1575 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1583 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1584 * @dev: ATA device to which the command is addressed
1585 * @cmd: SCSI command to execute
1586 * @done: SCSI command completion function
1587 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1589 * Our ->queuecommand() function has decided that the SCSI
1590 * command issued can be directly translated into an ATA
1591 * command, rather than handled internally.
1593 * This function sets up an ata_queued_cmd structure for the
1594 * SCSI command, and sends that ata_queued_cmd to the hardware.
1596 * The xlat_func argument (actor) returns 0 if ready to execute
1597 * ATA command, else 1 to finish translation. If 1 is returned
1598 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1599 * to be set reflecting an error condition or clean (early)
1603 * spin_lock_irqsave(host lock)
1606 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1607 * needs to be deferred.
1609 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1610 void (*done
)(struct scsi_cmnd
*),
1611 ata_xlat_func_t xlat_func
)
1613 struct ata_port
*ap
= dev
->link
->ap
;
1614 struct ata_queued_cmd
*qc
;
1619 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1623 /* data is present; dma-map it */
1624 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1625 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1626 if (unlikely(scsi_bufflen(cmd
) < 1)) {
1627 ata_dev_printk(dev
, KERN_WARNING
,
1628 "WARNING: zero len r/w req\n");
1632 ata_sg_init(qc
, scsi_sglist(cmd
), scsi_sg_count(cmd
));
1634 qc
->dma_dir
= cmd
->sc_data_direction
;
1637 qc
->complete_fn
= ata_scsi_qc_complete
;
1642 if (ap
->ops
->qc_defer
) {
1643 if ((rc
= ap
->ops
->qc_defer(qc
)))
1647 /* select device, send command to hardware */
1656 DPRINTK("EXIT - early finish (good or error)\n");
1661 cmd
->result
= (DID_ERROR
<< 16);
1664 DPRINTK("EXIT - internal\n");
1669 DPRINTK("EXIT - defer\n");
1670 if (rc
== ATA_DEFER_LINK
)
1671 return SCSI_MLQUEUE_DEVICE_BUSY
;
1673 return SCSI_MLQUEUE_HOST_BUSY
;
1677 * ata_scsi_rbuf_get - Map response buffer.
1678 * @cmd: SCSI command containing buffer to be mapped.
1679 * @buf_out: Pointer to mapped area.
1681 * Maps buffer contained within SCSI command @cmd.
1684 * spin_lock_irqsave(host lock)
1687 * Length of response buffer.
1690 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1693 unsigned int buflen
;
1695 struct scatterlist
*sg
= scsi_sglist(cmd
);
1698 buf
= kmap_atomic(sg_page(sg
), KM_IRQ0
) + sg
->offset
;
1699 buflen
= sg
->length
;
1710 * ata_scsi_rbuf_put - Unmap response buffer.
1711 * @cmd: SCSI command containing buffer to be unmapped.
1712 * @buf: buffer to unmap
1714 * Unmaps response buffer contained within @cmd.
1717 * spin_lock_irqsave(host lock)
1720 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1722 struct scatterlist
*sg
= scsi_sglist(cmd
);
1724 kunmap_atomic(buf
- sg
->offset
, KM_IRQ0
);
1728 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1729 * @args: device IDENTIFY data / SCSI command of interest.
1730 * @actor: Callback hook for desired SCSI command simulator
1732 * Takes care of the hard work of simulating a SCSI command...
1733 * Mapping the response buffer, calling the command's handler,
1734 * and handling the handler's return value. This return value
1735 * indicates whether the handler wishes the SCSI command to be
1736 * completed successfully (0), or not (in which case cmd->result
1737 * and sense buffer are assumed to be set).
1740 * spin_lock_irqsave(host lock)
1743 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1744 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1745 u8
*rbuf
, unsigned int buflen
))
1748 unsigned int buflen
, rc
;
1749 struct scsi_cmnd
*cmd
= args
->cmd
;
1750 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
1752 unsigned long flags
;
1754 local_irq_save(flags
);
1755 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
1757 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1758 memset(rbuf
, 0, buflen
);
1759 rc
= actor(args
, rbuf
, buflen
);
1760 ata_scsi_rbuf_put(cmd
, rbuf
);
1762 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
1764 local_irq_restore(flags
);
1766 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
1768 cmd
->result
= SAM_STAT_GOOD
;
1773 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1774 * @idx: byte index into SCSI response buffer
1775 * @val: value to set
1777 * To be used by SCSI command simulator functions. This macros
1778 * expects two local variables, u8 *rbuf and unsigned int buflen,
1784 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1785 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1789 * ata_scsiop_inq_std - Simulate INQUIRY command
1790 * @args: device IDENTIFY data / SCSI command of interest.
1791 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1792 * @buflen: Response buffer length.
1794 * Returns standard device identification data associated
1795 * with non-VPD INQUIRY command output.
1798 * spin_lock_irqsave(host lock)
1801 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1802 unsigned int buflen
)
1807 0x5, /* claim SPC-3 version compatibility */
1812 /* set scsi removeable (RMB) bit per ata bit */
1813 if (ata_id_removeable(args
->id
))
1818 memcpy(rbuf
, hdr
, sizeof(hdr
));
1821 memcpy(&rbuf
[8], "ATA ", 8);
1822 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1823 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1824 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1825 memcpy(&rbuf
[32], "n/a ", 4);
1829 const u8 versions
[] = {
1830 0x60, /* SAM-3 (no version claimed) */
1833 0x20, /* SBC-2 (no version claimed) */
1836 0x60 /* SPC-3 (no version claimed) */
1839 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1846 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1847 * @args: device IDENTIFY data / SCSI command of interest.
1848 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1849 * @buflen: Response buffer length.
1851 * Returns list of inquiry VPD pages available.
1854 * spin_lock_irqsave(host lock)
1857 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1858 unsigned int buflen
)
1860 const u8 pages
[] = {
1861 0x00, /* page 0x00, this page */
1862 0x80, /* page 0x80, unit serial no page */
1863 0x83 /* page 0x83, device ident page */
1865 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1868 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1874 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1875 * @args: device IDENTIFY data / SCSI command of interest.
1876 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1877 * @buflen: Response buffer length.
1879 * Returns ATA device serial number.
1882 * spin_lock_irqsave(host lock)
1885 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1886 unsigned int buflen
)
1890 0x80, /* this page code */
1892 ATA_ID_SERNO_LEN
, /* page len */
1894 memcpy(rbuf
, hdr
, sizeof(hdr
));
1896 if (buflen
> (ATA_ID_SERNO_LEN
+ 4 - 1))
1897 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1898 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
1904 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1905 * @args: device IDENTIFY data / SCSI command of interest.
1906 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1907 * @buflen: Response buffer length.
1909 * Yields two logical unit device identification designators:
1910 * - vendor specific ASCII containing the ATA serial number
1911 * - SAT defined "t10 vendor id based" containing ASCII vendor
1912 * name ("ATA "), model and serial numbers.
1915 * spin_lock_irqsave(host lock)
1918 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1919 unsigned int buflen
)
1922 const int sat_model_serial_desc_len
= 68;
1924 rbuf
[1] = 0x83; /* this page code */
1927 if (buflen
> (ATA_ID_SERNO_LEN
+ num
+ 3)) {
1928 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1930 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
1932 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1933 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
1934 num
+= ATA_ID_SERNO_LEN
;
1936 if (buflen
> (sat_model_serial_desc_len
+ num
+ 3)) {
1937 /* SAT defined lu model and serial numbers descriptor */
1938 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1941 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
1943 memcpy(rbuf
+ num
, "ATA ", 8);
1945 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1946 ATA_ID_PROD
, ATA_ID_PROD_LEN
);
1947 num
+= ATA_ID_PROD_LEN
;
1948 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1949 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
1950 num
+= ATA_ID_SERNO_LEN
;
1952 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
1957 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1958 * @args: device IDENTIFY data / SCSI command of interest.
1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1960 * @buflen: Response buffer length.
1962 * Yields SAT-specified ATA VPD page.
1965 * spin_lock_irqsave(host lock)
1968 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args
*args
, u8
*rbuf
,
1969 unsigned int buflen
)
1972 struct ata_taskfile tf
;
1978 memset(&pbuf
, 0, sizeof(pbuf
));
1979 memset(&tf
, 0, sizeof(tf
));
1981 pbuf
[1] = 0x89; /* our page code */
1982 pbuf
[2] = (0x238 >> 8); /* page size fixed at 238h */
1983 pbuf
[3] = (0x238 & 0xff);
1985 memcpy(&pbuf
[8], "linux ", 8);
1986 memcpy(&pbuf
[16], "libata ", 16);
1987 memcpy(&pbuf
[32], DRV_VERSION
, 4);
1988 ata_id_string(args
->id
, &pbuf
[32], ATA_ID_FW_REV
, 4);
1990 /* we don't store the ATA device signature, so we fake it */
1992 tf
.command
= ATA_DRDY
; /* really, this is Status reg */
1996 ata_tf_to_fis(&tf
, 0, 1, &pbuf
[36]); /* TODO: PMP? */
1997 pbuf
[36] = 0x34; /* force D2H Reg FIS (34h) */
1999 pbuf
[56] = ATA_CMD_ID_ATA
;
2001 i
= min(buflen
, 60U);
2002 memcpy(rbuf
, &pbuf
[0], i
);
2008 memcpy(&rbuf
[60], &args
->id
[0], min(buflen
, 512U));
2013 * ata_scsiop_noop - Command handler that simply returns success.
2014 * @args: device IDENTIFY data / SCSI command of interest.
2015 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2016 * @buflen: Response buffer length.
2018 * No operation. Simply returns success to caller, to indicate
2019 * that the caller should successfully complete this SCSI command.
2022 * spin_lock_irqsave(host lock)
2025 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
2026 unsigned int buflen
)
2033 * ata_msense_push - Push data onto MODE SENSE data output buffer
2034 * @ptr_io: (input/output) Location to store more output data
2035 * @last: End of output data buffer
2036 * @buf: Pointer to BLOB being added to output buffer
2037 * @buflen: Length of BLOB
2039 * Store MODE SENSE data on an output buffer.
2045 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
2046 const u8
*buf
, unsigned int buflen
)
2050 if ((ptr
+ buflen
- 1) > last
)
2053 memcpy(ptr
, buf
, buflen
);
2061 * ata_msense_caching - Simulate MODE SENSE caching info page
2062 * @id: device IDENTIFY data
2063 * @ptr_io: (input/output) Location to store more output data
2064 * @last: End of output data buffer
2066 * Generate a caching info page, which conditionally indicates
2067 * write caching to the SCSI layer, depending on device
2074 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
2077 u8 page
[CACHE_MPAGE_LEN
];
2079 memcpy(page
, def_cache_mpage
, sizeof(page
));
2080 if (ata_id_wcache_enabled(id
))
2081 page
[2] |= (1 << 2); /* write cache enable */
2082 if (!ata_id_rahead_enabled(id
))
2083 page
[12] |= (1 << 5); /* disable read ahead */
2085 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
2086 return sizeof(page
);
2090 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2091 * @dev: Device associated with this MODE SENSE command
2092 * @ptr_io: (input/output) Location to store more output data
2093 * @last: End of output data buffer
2095 * Generate a generic MODE SENSE control mode page.
2101 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
2103 ata_msense_push(ptr_io
, last
, def_control_mpage
,
2104 sizeof(def_control_mpage
));
2105 return sizeof(def_control_mpage
);
2109 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2110 * @dev: Device associated with this MODE SENSE command
2111 * @ptr_io: (input/output) Location to store more output data
2112 * @last: End of output data buffer
2114 * Generate a generic MODE SENSE r/w error recovery page.
2120 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
2123 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
2124 sizeof(def_rw_recovery_mpage
));
2125 return sizeof(def_rw_recovery_mpage
);
2129 * We can turn this into a real blacklist if it's needed, for now just
2130 * blacklist any Maxtor BANC1G10 revision firmware
2132 static int ata_dev_supports_fua(u16
*id
)
2134 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
2138 if (!ata_id_has_fua(id
))
2141 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
2142 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
2144 if (strcmp(model
, "Maxtor"))
2146 if (strcmp(fw
, "BANC1G10"))
2149 return 0; /* blacklisted */
2153 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2154 * @args: device IDENTIFY data / SCSI command of interest.
2155 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2156 * @buflen: Response buffer length.
2158 * Simulate MODE SENSE commands. Assume this is invoked for direct
2159 * access devices (e.g. disks) only. There should be no block
2160 * descriptor for other device types.
2163 * spin_lock_irqsave(host lock)
2166 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
2167 unsigned int buflen
)
2169 struct ata_device
*dev
= args
->dev
;
2170 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
2171 const u8 sat_blk_desc
[] = {
2172 0, 0, 0, 0, /* number of blocks: sat unspecified */
2174 0, 0x2, 0x0 /* block length: 512 bytes */
2177 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
2182 six_byte
= (scsicmd
[0] == MODE_SENSE
);
2183 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
2185 * LLBA bit in msense(10) ignored (compliant)
2188 page_control
= scsicmd
[2] >> 6;
2189 switch (page_control
) {
2190 case 0: /* current */
2191 break; /* supported */
2193 goto saving_not_supp
;
2194 case 1: /* changeable */
2195 case 2: /* defaults */
2201 output_len
= 4 + (ebd
? 8 : 0);
2202 alloc_len
= scsicmd
[4];
2204 output_len
= 8 + (ebd
? 8 : 0);
2205 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
2207 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
2209 p
= rbuf
+ output_len
;
2210 last
= rbuf
+ minlen
- 1;
2212 pg
= scsicmd
[2] & 0x3f;
2215 * No mode subpages supported (yet) but asking for _all_
2216 * subpages may be valid
2218 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2222 case RW_RECOVERY_MPAGE
:
2223 output_len
+= ata_msense_rw_recovery(&p
, last
);
2227 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
2230 case CONTROL_MPAGE
: {
2231 output_len
+= ata_msense_ctl_mode(&p
, last
);
2236 output_len
+= ata_msense_rw_recovery(&p
, last
);
2237 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
2238 output_len
+= ata_msense_ctl_mode(&p
, last
);
2241 default: /* invalid page code */
2249 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2250 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2255 rbuf
[0] = output_len
;
2260 rbuf
[3] = sizeof(sat_blk_desc
);
2262 memcpy(rbuf
+ 4, sat_blk_desc
,
2263 sizeof(sat_blk_desc
));
2267 rbuf
[0] = output_len
>> 8;
2269 rbuf
[1] = output_len
;
2274 rbuf
[7] = sizeof(sat_blk_desc
);
2276 memcpy(rbuf
+ 8, sat_blk_desc
,
2277 sizeof(sat_blk_desc
));
2283 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2284 /* "Invalid field in cbd" */
2288 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2289 /* "Saving parameters not supported" */
2294 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2295 * @args: device IDENTIFY data / SCSI command of interest.
2296 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2297 * @buflen: Response buffer length.
2299 * Simulate READ CAPACITY commands.
2304 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
2305 unsigned int buflen
)
2307 u64 last_lba
= args
->dev
->n_sectors
- 1; /* LBA of the last block */
2311 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2312 if (last_lba
>= 0xffffffffULL
)
2313 last_lba
= 0xffffffff;
2315 /* sector count, 32-bit */
2316 ATA_SCSI_RBUF_SET(0, last_lba
>> (8 * 3));
2317 ATA_SCSI_RBUF_SET(1, last_lba
>> (8 * 2));
2318 ATA_SCSI_RBUF_SET(2, last_lba
>> (8 * 1));
2319 ATA_SCSI_RBUF_SET(3, last_lba
);
2322 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE
>> 8);
2323 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE
& 0xff);
2325 /* sector count, 64-bit */
2326 ATA_SCSI_RBUF_SET(0, last_lba
>> (8 * 7));
2327 ATA_SCSI_RBUF_SET(1, last_lba
>> (8 * 6));
2328 ATA_SCSI_RBUF_SET(2, last_lba
>> (8 * 5));
2329 ATA_SCSI_RBUF_SET(3, last_lba
>> (8 * 4));
2330 ATA_SCSI_RBUF_SET(4, last_lba
>> (8 * 3));
2331 ATA_SCSI_RBUF_SET(5, last_lba
>> (8 * 2));
2332 ATA_SCSI_RBUF_SET(6, last_lba
>> (8 * 1));
2333 ATA_SCSI_RBUF_SET(7, last_lba
);
2336 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE
>> 8);
2337 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE
& 0xff);
2344 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2345 * @args: device IDENTIFY data / SCSI command of interest.
2346 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2347 * @buflen: Response buffer length.
2349 * Simulate REPORT LUNS command.
2352 * spin_lock_irqsave(host lock)
2355 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
2356 unsigned int buflen
)
2359 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2365 * ata_scsi_set_sense - Set SCSI sense data and status
2366 * @cmd: SCSI request to be handled
2367 * @sk: SCSI-defined sense key
2368 * @asc: SCSI-defined additional sense code
2369 * @ascq: SCSI-defined additional sense code qualifier
2371 * Helper function that builds a valid fixed format, current
2372 * response code and the given sense key (sk), additional sense
2373 * code (asc) and additional sense code qualifier (ascq) with
2374 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2375 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2381 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
2383 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
2385 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
2386 cmd
->sense_buffer
[2] = sk
;
2387 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
2388 cmd
->sense_buffer
[12] = asc
;
2389 cmd
->sense_buffer
[13] = ascq
;
2393 * ata_scsi_badcmd - End a SCSI request with an error
2394 * @cmd: SCSI request to be handled
2395 * @done: SCSI command completion function
2396 * @asc: SCSI-defined additional sense code
2397 * @ascq: SCSI-defined additional sense code qualifier
2399 * Helper function that completes a SCSI command with
2400 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2401 * and the specified additional sense codes.
2404 * spin_lock_irqsave(host lock)
2407 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
2410 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
2415 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2417 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2418 /* FIXME: not quite right; we don't want the
2419 * translation of taskfile registers into
2420 * a sense descriptors, since that's only
2421 * correct for ATA, not ATAPI
2423 ata_gen_passthru_sense(qc
);
2426 qc
->scsidone(qc
->scsicmd
);
2430 /* is it pointless to prefer PIO for "safety reasons"? */
2431 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2433 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2436 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2438 struct ata_port
*ap
= qc
->ap
;
2439 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2441 DPRINTK("ATAPI request sense\n");
2443 /* FIXME: is this needed? */
2444 memset(cmd
->sense_buffer
, 0, SCSI_SENSE_BUFFERSIZE
);
2446 ap
->ops
->tf_read(ap
, &qc
->tf
);
2448 /* fill these in, for the case where they are -not- overwritten */
2449 cmd
->sense_buffer
[0] = 0x70;
2450 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2454 /* setup sg table and init transfer direction */
2455 sg_init_one(&qc
->sgent
, cmd
->sense_buffer
, SCSI_SENSE_BUFFERSIZE
);
2456 ata_sg_init(qc
, &qc
->sgent
, 1);
2457 qc
->dma_dir
= DMA_FROM_DEVICE
;
2459 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2460 qc
->cdb
[0] = REQUEST_SENSE
;
2461 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2463 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2464 qc
->tf
.command
= ATA_CMD_PACKET
;
2466 if (ata_pio_use_silly(ap
)) {
2467 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2468 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2470 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2471 qc
->tf
.lbam
= SCSI_SENSE_BUFFERSIZE
;
2474 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2476 qc
->complete_fn
= atapi_sense_complete
;
2483 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2485 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2486 unsigned int err_mask
= qc
->err_mask
;
2488 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2490 /* handle completion from new EH */
2491 if (unlikely(qc
->ap
->ops
->error_handler
&&
2492 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2494 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2495 /* FIXME: not quite right; we don't want the
2496 * translation of taskfile registers into a
2497 * sense descriptors, since that's only
2498 * correct for ATA, not ATAPI
2500 ata_gen_passthru_sense(qc
);
2503 /* SCSI EH automatically locks door if sdev->locked is
2504 * set. Sometimes door lock request continues to
2505 * fail, for example, when no media is present. This
2506 * creates a loop - SCSI EH issues door lock which
2507 * fails and gets invoked again to acquire sense data
2508 * for the failed command.
2510 * If door lock fails, always clear sdev->locked to
2511 * avoid this infinite loop.
2513 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
)
2514 qc
->dev
->sdev
->locked
= 0;
2516 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2522 /* successful completion or old EH failure path */
2523 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2524 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2525 atapi_request_sense(qc
);
2527 } else if (unlikely(err_mask
)) {
2528 /* FIXME: not quite right; we don't want the
2529 * translation of taskfile registers into
2530 * a sense descriptors, since that's only
2531 * correct for ATA, not ATAPI
2533 ata_gen_passthru_sense(qc
);
2535 u8
*scsicmd
= cmd
->cmnd
;
2537 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2539 unsigned int buflen
;
2540 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
2542 unsigned long flags
;
2544 local_irq_save(flags
);
2545 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
2547 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2549 /* ATAPI devices typically report zero for their SCSI version,
2550 * and sometimes deviate from the spec WRT response data
2551 * format. If SCSI version is reported as zero like normal,
2552 * then we make the following fixups: 1) Fake MMC-5 version,
2553 * to indicate to the Linux scsi midlayer this is a modern
2554 * device. 2) Ensure response data format / ATAPI information
2555 * are always correct.
2562 ata_scsi_rbuf_put(cmd
, buf
);
2563 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
2566 local_irq_restore(flags
);
2567 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
2570 cmd
->result
= SAM_STAT_GOOD
;
2577 * atapi_xlat - Initialize PACKET taskfile
2578 * @qc: command structure to be initialized
2581 * spin_lock_irqsave(host lock)
2584 * Zero on success, non-zero on failure.
2586 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2588 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2589 struct ata_device
*dev
= qc
->dev
;
2590 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2591 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2592 unsigned int nbytes
;
2594 memset(qc
->cdb
, 0, dev
->cdb_len
);
2595 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2597 qc
->complete_fn
= atapi_qc_complete
;
2599 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2600 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2601 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2602 DPRINTK("direction: write\n");
2605 qc
->tf
.command
= ATA_CMD_PACKET
;
2606 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
2607 qc
->nbytes
= scsi_bufflen(scmd
);
2609 qc
->nbytes
= scsi_bufflen(scmd
) + scmd
->request
->extra_len
;
2610 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
2612 /* check whether ATAPI DMA is safe */
2613 if (!using_pio
&& ata_check_atapi_dma(qc
))
2616 /* Some controller variants snoop this value for Packet
2617 * transfers to do state machine and FIFO management. Thus we
2618 * want to set it properly, and for DMA where it is
2619 * effectively meaningless.
2621 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
2622 nbytes
= min(qc
->nbytes
, (unsigned int)63 * 1024);
2624 nbytes
= min(scmd
->request
->data_len
, (unsigned int)63 * 1024);
2625 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
2627 /* Most ATAPI devices which honor transfer chunk size don't
2628 * behave according to the spec when odd chunk size which
2629 * matches the transfer length is specified. If the number of
2630 * bytes to transfer is 2n+1. According to the spec, what
2631 * should happen is to indicate that 2n+1 is going to be
2632 * transferred and transfer 2n+2 bytes where the last byte is
2635 * In practice, this doesn't happen. ATAPI devices first
2636 * indicate and transfer 2n bytes and then indicate and
2637 * transfer 2 bytes where the last byte is padding.
2639 * This inconsistency confuses several controllers which
2640 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2641 * These controllers use actual number of transferred bytes to
2642 * update DMA poitner and transfer of 4n+2 bytes make those
2643 * controller push DMA pointer by 4n+4 bytes because SATA data
2644 * FISes are aligned to 4 bytes. This causes data corruption
2645 * and buffer overrun.
2647 * Always setting nbytes to even number solves this problem
2648 * because then ATAPI devices don't have to split data at 2n
2654 qc
->tf
.lbam
= (nbytes
& 0xFF);
2655 qc
->tf
.lbah
= (nbytes
>> 8);
2657 if (using_pio
|| nodata
) {
2658 /* no data, or PIO data xfer */
2660 qc
->tf
.protocol
= ATAPI_PROT_NODATA
;
2662 qc
->tf
.protocol
= ATAPI_PROT_PIO
;
2665 qc
->tf
.protocol
= ATAPI_PROT_DMA
;
2666 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2668 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
2669 if (atapi_dmadir
&& (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2671 if ((dev
->flags
& ATA_DFLAG_DMADIR
) &&
2672 (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2673 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
2674 /* some SATA bridges need us to indicate data xfer direction */
2675 qc
->tf
.feature
|= ATAPI_DMADIR
;
2679 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2680 as ATAPI tape drives don't get this right otherwise */
2684 static struct ata_device
*ata_find_dev(struct ata_port
*ap
, int devno
)
2686 if (ap
->nr_pmp_links
== 0) {
2687 if (likely(devno
< ata_link_max_devices(&ap
->link
)))
2688 return &ap
->link
.device
[devno
];
2690 if (likely(devno
< ap
->nr_pmp_links
))
2691 return &ap
->pmp_link
[devno
].device
[0];
2697 static struct ata_device
*__ata_scsi_find_dev(struct ata_port
*ap
,
2698 const struct scsi_device
*scsidev
)
2702 /* skip commands not addressed to targets we simulate */
2703 if (ap
->nr_pmp_links
== 0) {
2704 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2706 devno
= scsidev
->id
;
2708 if (unlikely(scsidev
->id
|| scsidev
->lun
))
2710 devno
= scsidev
->channel
;
2713 return ata_find_dev(ap
, devno
);
2717 * ata_scsi_dev_enabled - determine if device is enabled
2720 * Determine if commands should be sent to the specified device.
2723 * spin_lock_irqsave(host lock)
2726 * 0 if commands are not allowed / 1 if commands are allowed
2729 static int ata_scsi_dev_enabled(struct ata_device
*dev
)
2731 if (unlikely(!ata_dev_enabled(dev
)))
2734 if (!atapi_enabled
|| (dev
->link
->ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2735 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2736 ata_dev_printk(dev
, KERN_WARNING
,
2737 "WARNING: ATAPI is %s, device ignored.\n",
2738 atapi_enabled
? "not supported with this driver" : "disabled");
2747 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2748 * @ap: ATA port to which the device is attached
2749 * @scsidev: SCSI device from which we derive the ATA device
2751 * Given various information provided in struct scsi_cmnd,
2752 * map that onto an ATA bus, and using that mapping
2753 * determine which ata_device is associated with the
2754 * SCSI command to be sent.
2757 * spin_lock_irqsave(host lock)
2760 * Associated ATA device, or %NULL if not found.
2762 static struct ata_device
*
2763 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2765 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2767 if (unlikely(!dev
|| !ata_scsi_dev_enabled(dev
)))
2774 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2775 * @byte1: Byte 1 from pass-thru CDB.
2778 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2781 ata_scsi_map_proto(u8 byte1
)
2783 switch((byte1
& 0x1e) >> 1) {
2784 case 3: /* Non-data */
2785 return ATA_PROT_NODATA
;
2788 case 10: /* UDMA Data-in */
2789 case 11: /* UDMA Data-Out */
2790 return ATA_PROT_DMA
;
2792 case 4: /* PIO Data-in */
2793 case 5: /* PIO Data-out */
2794 return ATA_PROT_PIO
;
2796 case 0: /* Hard Reset */
2798 case 8: /* Device Diagnostic */
2799 case 9: /* Device Reset */
2800 case 7: /* DMA Queued */
2801 case 12: /* FPDMA */
2802 case 15: /* Return Response Info */
2803 default: /* Reserved */
2807 return ATA_PROT_UNKNOWN
;
2811 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2812 * @qc: command structure to be initialized
2814 * Handles either 12 or 16-byte versions of the CDB.
2817 * Zero on success, non-zero on failure.
2819 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2821 struct ata_taskfile
*tf
= &(qc
->tf
);
2822 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2823 struct ata_device
*dev
= qc
->dev
;
2824 const u8
*cdb
= scmd
->cmnd
;
2826 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2830 * Filter TPM commands by default. These provide an
2831 * essentially uncontrolled encrypted "back door" between
2832 * applications and the disk. Set libata.allow_tpm=1 if you
2833 * have a real reason for wanting to use them. This ensures
2834 * that installed software cannot easily mess stuff up without
2835 * user intent. DVR type users will probably ship with this enabled
2836 * for movie content management.
2838 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2839 * for this and should do in future but that it is not sufficient as
2840 * DCS is an optional feature set. Thus we also do the software filter
2841 * so that we comply with the TC consortium stated goal that the user
2842 * can turn off TC features of their system.
2844 if (tf
->command
>= 0x5C && tf
->command
<= 0x5F && !libata_allow_tpm
)
2847 /* We may not issue DMA commands if no DMA mode is set */
2848 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2852 * 12 and 16 byte CDBs use different offsets to
2853 * provide the various register values.
2855 if (cdb
[0] == ATA_16
) {
2857 * 16-byte CDB - may contain extended commands.
2859 * If that is the case, copy the upper byte register values.
2861 if (cdb
[1] & 0x01) {
2862 tf
->hob_feature
= cdb
[3];
2863 tf
->hob_nsect
= cdb
[5];
2864 tf
->hob_lbal
= cdb
[7];
2865 tf
->hob_lbam
= cdb
[9];
2866 tf
->hob_lbah
= cdb
[11];
2867 tf
->flags
|= ATA_TFLAG_LBA48
;
2869 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2872 * Always copy low byte, device and command registers.
2874 tf
->feature
= cdb
[4];
2879 tf
->device
= cdb
[13];
2880 tf
->command
= cdb
[14];
2883 * 12-byte CDB - incapable of extended commands.
2885 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2887 tf
->feature
= cdb
[3];
2892 tf
->device
= cdb
[8];
2893 tf
->command
= cdb
[9];
2896 /* enforce correct master/slave bit */
2897 tf
->device
= dev
->devno
?
2898 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2900 /* sanity check for pio multi commands */
2901 if ((cdb
[1] & 0xe0) && !is_multi_taskfile(tf
))
2904 if (is_multi_taskfile(tf
)) {
2905 unsigned int multi_count
= 1 << (cdb
[1] >> 5);
2907 /* compare the passed through multi_count
2908 * with the cached multi_count of libata
2910 if (multi_count
!= dev
->multi_count
)
2911 ata_dev_printk(dev
, KERN_WARNING
,
2912 "invalid multi_count %u ignored\n",
2916 /* READ/WRITE LONG use a non-standard sect_size */
2917 qc
->sect_size
= ATA_SECT_SIZE
;
2918 switch (tf
->command
) {
2919 case ATA_CMD_READ_LONG
:
2920 case ATA_CMD_READ_LONG_ONCE
:
2921 case ATA_CMD_WRITE_LONG
:
2922 case ATA_CMD_WRITE_LONG_ONCE
:
2923 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2925 qc
->sect_size
= scsi_bufflen(scmd
);
2929 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2930 * SET_FEATURES - XFER MODE must be preceded/succeeded
2931 * by an update to hardware-specific registers for each
2932 * controller (i.e. the reason for ->set_piomode(),
2933 * ->set_dmamode(), and ->post_set_mode() hooks).
2935 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2936 && (tf
->feature
== SETFEATURES_XFER
))
2940 * Set flags so that all registers will be written,
2941 * and pass on write indication (used for PIO/DMA
2944 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2946 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2947 tf
->flags
|= ATA_TFLAG_WRITE
;
2950 * Set transfer length.
2952 * TODO: find out if we need to do more here to
2953 * cover scatter/gather case.
2955 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
2956 qc
->nbytes
= scsi_bufflen(scmd
);
2958 qc
->nbytes
= scsi_bufflen(scmd
) + scmd
->request
->extra_len
;
2959 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
2961 /* request result TF and be quiet about device error */
2962 qc
->flags
|= ATA_QCFLAG_RESULT_TF
| ATA_QCFLAG_QUIET
;
2967 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2968 /* "Invalid field in cdb" */
2973 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2975 * @cmd: SCSI command opcode to consider
2977 * Look up the SCSI command given, and determine whether the
2978 * SCSI command is to be translated or simulated.
2981 * Pointer to translation function if possible, %NULL if not.
2984 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2994 return ata_scsi_rw_xlat
;
2996 case SYNCHRONIZE_CACHE
:
2997 if (ata_try_flush_cache(dev
))
2998 return ata_scsi_flush_xlat
;
3003 return ata_scsi_verify_xlat
;
3007 return ata_scsi_pass_thru
;
3010 return ata_scsi_start_stop_xlat
;
3017 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3018 * @ap: ATA port to which the command was being sent
3019 * @cmd: SCSI command to dump
3021 * Prints the contents of a SCSI command via printk().
3024 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
3025 struct scsi_cmnd
*cmd
)
3028 struct scsi_device
*scsidev
= cmd
->device
;
3029 u8
*scsicmd
= cmd
->cmnd
;
3031 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3033 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
3034 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
3035 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
3040 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
3041 void (*done
)(struct scsi_cmnd
*),
3042 struct ata_device
*dev
)
3044 u8 scsi_op
= scmd
->cmnd
[0];
3045 ata_xlat_func_t xlat_func
;
3048 if (dev
->class == ATA_DEV_ATA
) {
3049 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
))
3052 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3054 if (unlikely(!scmd
->cmd_len
))
3058 if (likely((scsi_op
!= ATA_16
) || !atapi_passthru16
)) {
3059 /* relay SCSI command to ATAPI device */
3060 int len
= COMMAND_SIZE(scsi_op
);
3061 if (unlikely(len
> scmd
->cmd_len
|| len
> dev
->cdb_len
))
3064 xlat_func
= atapi_xlat
;
3066 /* ATA_16 passthru, treat as an ATA command */
3067 if (unlikely(scmd
->cmd_len
> 16))
3070 xlat_func
= ata_get_xlat_func(dev
, scsi_op
);
3075 rc
= ata_scsi_translate(dev
, scmd
, done
, xlat_func
);
3077 ata_scsi_simulate(dev
, scmd
, done
);
3082 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3083 scmd
->cmd_len
, scsi_op
, dev
->cdb_len
);
3084 scmd
->result
= DID_ERROR
<< 16;
3090 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3091 * @cmd: SCSI command to be sent
3092 * @done: Completion function, called when command is complete
3094 * In some cases, this function translates SCSI commands into
3095 * ATA taskfiles, and queues the taskfiles to be sent to
3096 * hardware. In other cases, this function simulates a
3097 * SCSI device by evaluating and responding to certain
3098 * SCSI commands. This creates the overall effect of
3099 * ATA and ATAPI devices appearing as SCSI devices.
3102 * Releases scsi-layer-held lock, and obtains host lock.
3105 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3108 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
3110 struct ata_port
*ap
;
3111 struct ata_device
*dev
;
3112 struct scsi_device
*scsidev
= cmd
->device
;
3113 struct Scsi_Host
*shost
= scsidev
->host
;
3116 ap
= ata_shost_to_port(shost
);
3118 spin_unlock(shost
->host_lock
);
3119 spin_lock(ap
->lock
);
3121 ata_scsi_dump_cdb(ap
, cmd
);
3123 dev
= ata_scsi_find_dev(ap
, scsidev
);
3125 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
3127 cmd
->result
= (DID_BAD_TARGET
<< 16);
3131 spin_unlock(ap
->lock
);
3132 spin_lock(shost
->host_lock
);
3137 * ata_scsi_simulate - simulate SCSI command on ATA device
3138 * @dev: the target device
3139 * @cmd: SCSI command being sent to device.
3140 * @done: SCSI command completion function.
3142 * Interprets and directly executes a select list of SCSI commands
3143 * that can be handled internally.
3146 * spin_lock_irqsave(host lock)
3149 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
3150 void (*done
)(struct scsi_cmnd
*))
3152 struct ata_scsi_args args
;
3153 const u8
*scsicmd
= cmd
->cmnd
;
3161 switch(scsicmd
[0]) {
3162 /* TODO: worth improving? */
3164 ata_scsi_invalid_field(cmd
, done
);
3168 if (scsicmd
[1] & 2) /* is CmdDt set? */
3169 ata_scsi_invalid_field(cmd
, done
);
3170 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
3171 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
3172 else switch (scsicmd
[2]) {
3174 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
3177 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
3180 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
3183 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_89
);
3186 ata_scsi_invalid_field(cmd
, done
);
3193 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
3196 case MODE_SELECT
: /* unconditionally return */
3197 case MODE_SELECT_10
: /* bad-field-in-cdb */
3198 ata_scsi_invalid_field(cmd
, done
);
3202 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3205 case SERVICE_ACTION_IN
:
3206 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
3207 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
3209 ata_scsi_invalid_field(cmd
, done
);
3213 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
3217 ata_scsi_set_sense(cmd
, 0, 0, 0);
3218 cmd
->result
= (DRIVER_SENSE
<< 24);
3222 /* if we reach this, then writeback caching is disabled,
3223 * turning this into a no-op.
3225 case SYNCHRONIZE_CACHE
:
3228 /* no-op's, complete with success */
3232 case TEST_UNIT_READY
:
3233 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3236 case SEND_DIAGNOSTIC
:
3237 tmp8
= scsicmd
[1] & ~(1 << 3);
3238 if ((tmp8
== 0x4) && (!scsicmd
[3]) && (!scsicmd
[4]))
3239 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
3241 ata_scsi_invalid_field(cmd
, done
);
3244 /* all other commands */
3246 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
3247 /* "Invalid command operation code" */
3253 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
3257 for (i
= 0; i
< host
->n_ports
; i
++) {
3258 struct ata_port
*ap
= host
->ports
[i
];
3259 struct Scsi_Host
*shost
;
3262 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
3266 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
3267 ap
->scsi_host
= shost
;
3269 shost
->transportt
= &ata_scsi_transport_template
;
3270 shost
->unique_id
= ap
->print_id
;
3273 shost
->max_channel
= 1;
3274 shost
->max_cmd_len
= 16;
3276 /* Schedule policy is determined by ->qc_defer()
3277 * callback and it needs to see every deferred qc.
3278 * Set host_blocked to 1 to prevent SCSI midlayer from
3279 * automatically deferring requests.
3281 shost
->max_host_blocked
= 1;
3283 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
3291 scsi_host_put(host
->ports
[i
]->scsi_host
);
3294 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
3296 scsi_remove_host(shost
);
3297 scsi_host_put(shost
);
3302 void ata_scsi_scan_host(struct ata_port
*ap
, int sync
)
3305 struct ata_device
*last_failed_dev
= NULL
;
3306 struct ata_link
*link
;
3307 struct ata_device
*dev
;
3309 if (ap
->flags
& ATA_FLAG_DISABLED
)
3313 ata_port_for_each_link(link
, ap
) {
3314 ata_link_for_each_dev(dev
, link
) {
3315 struct scsi_device
*sdev
;
3316 int channel
= 0, id
= 0;
3318 if (!ata_dev_enabled(dev
) || dev
->sdev
)
3321 if (ata_is_host_link(link
))
3324 channel
= link
->pmp
;
3326 sdev
= __scsi_add_device(ap
->scsi_host
, channel
, id
, 0,
3328 if (!IS_ERR(sdev
)) {
3330 scsi_device_put(sdev
);
3335 /* If we scanned while EH was in progress or allocation
3336 * failure occurred, scan would have failed silently. Check
3337 * whether all devices are attached.
3339 ata_port_for_each_link(link
, ap
) {
3340 ata_link_for_each_dev(dev
, link
) {
3341 if (ata_dev_enabled(dev
) && !dev
->sdev
)
3349 /* we're missing some SCSI devices */
3351 /* If caller requested synchrnous scan && we've made
3352 * any progress, sleep briefly and repeat.
3354 if (dev
!= last_failed_dev
) {
3356 last_failed_dev
= dev
;
3360 /* We might be failing to detect boot device, give it
3361 * a few more chances.
3368 ata_port_printk(ap
, KERN_ERR
, "WARNING: synchronous SCSI scan "
3369 "failed without making any progress,\n"
3370 " switching to async\n");
3373 queue_delayed_work(ata_aux_wq
, &ap
->hotplug_task
,
3374 round_jiffies_relative(HZ
));
3378 * ata_scsi_offline_dev - offline attached SCSI device
3379 * @dev: ATA device to offline attached SCSI device for
3381 * This function is called from ata_eh_hotplug() and responsible
3382 * for taking the SCSI device attached to @dev offline. This
3383 * function is called with host lock which protects dev->sdev
3387 * spin_lock_irqsave(host lock)
3390 * 1 if attached SCSI device exists, 0 otherwise.
3392 int ata_scsi_offline_dev(struct ata_device
*dev
)
3395 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
3402 * ata_scsi_remove_dev - remove attached SCSI device
3403 * @dev: ATA device to remove attached SCSI device for
3405 * This function is called from ata_eh_scsi_hotplug() and
3406 * responsible for removing the SCSI device attached to @dev.
3409 * Kernel thread context (may sleep).
3411 static void ata_scsi_remove_dev(struct ata_device
*dev
)
3413 struct ata_port
*ap
= dev
->link
->ap
;
3414 struct scsi_device
*sdev
;
3415 unsigned long flags
;
3417 /* Alas, we need to grab scan_mutex to ensure SCSI device
3418 * state doesn't change underneath us and thus
3419 * scsi_device_get() always succeeds. The mutex locking can
3420 * be removed if there is __scsi_device_get() interface which
3421 * increments reference counts regardless of device state.
3423 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3424 spin_lock_irqsave(ap
->lock
, flags
);
3426 /* clearing dev->sdev is protected by host lock */
3431 /* If user initiated unplug races with us, sdev can go
3432 * away underneath us after the host lock and
3433 * scan_mutex are released. Hold onto it.
3435 if (scsi_device_get(sdev
) == 0) {
3436 /* The following ensures the attached sdev is
3437 * offline on return from ata_scsi_offline_dev()
3438 * regardless it wins or loses the race
3439 * against this function.
3441 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3448 spin_unlock_irqrestore(ap
->lock
, flags
);
3449 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3452 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
3453 sdev
->sdev_gendev
.bus_id
);
3455 scsi_remove_device(sdev
);
3456 scsi_device_put(sdev
);
3460 static void ata_scsi_handle_link_detach(struct ata_link
*link
)
3462 struct ata_port
*ap
= link
->ap
;
3463 struct ata_device
*dev
;
3465 ata_link_for_each_dev(dev
, link
) {
3466 unsigned long flags
;
3468 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3471 spin_lock_irqsave(ap
->lock
, flags
);
3472 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3473 spin_unlock_irqrestore(ap
->lock
, flags
);
3475 ata_scsi_remove_dev(dev
);
3480 * ata_scsi_media_change_notify - send media change event
3481 * @dev: Pointer to the disk device with media change event
3483 * Tell the block layer to send a media change notification
3487 * spin_lock_irqsave(host lock)
3489 void ata_scsi_media_change_notify(struct ata_device
*dev
)
3492 sdev_evt_send_simple(dev
->sdev
, SDEV_EVT_MEDIA_CHANGE
,
3497 * ata_scsi_hotplug - SCSI part of hotplug
3498 * @work: Pointer to ATA port to perform SCSI hotplug on
3500 * Perform SCSI part of hotplug. It's executed from a separate
3501 * workqueue after EH completes. This is necessary because SCSI
3502 * hot plugging requires working EH and hot unplugging is
3503 * synchronized with hot plugging with a mutex.
3506 * Kernel thread context (may sleep).
3508 void ata_scsi_hotplug(struct work_struct
*work
)
3510 struct ata_port
*ap
=
3511 container_of(work
, struct ata_port
, hotplug_task
.work
);
3514 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3515 DPRINTK("ENTER/EXIT - unloading\n");
3521 /* Unplug detached devices. We cannot use link iterator here
3522 * because PMP links have to be scanned even if PMP is
3523 * currently not attached. Iterate manually.
3525 ata_scsi_handle_link_detach(&ap
->link
);
3527 for (i
= 0; i
< SATA_PMP_MAX_PORTS
; i
++)
3528 ata_scsi_handle_link_detach(&ap
->pmp_link
[i
]);
3530 /* scan for new ones */
3531 ata_scsi_scan_host(ap
, 0);
3537 * ata_scsi_user_scan - indication for user-initiated bus scan
3538 * @shost: SCSI host to scan
3539 * @channel: Channel to scan
3543 * This function is called when user explicitly requests bus
3544 * scan. Set probe pending flag and invoke EH.
3547 * SCSI layer (we don't care)
3552 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3553 unsigned int id
, unsigned int lun
)
3555 struct ata_port
*ap
= ata_shost_to_port(shost
);
3556 unsigned long flags
;
3559 if (!ap
->ops
->error_handler
)
3562 if (lun
!= SCAN_WILD_CARD
&& lun
)
3565 if (ap
->nr_pmp_links
== 0) {
3566 if (channel
!= SCAN_WILD_CARD
&& channel
)
3570 if (id
!= SCAN_WILD_CARD
&& id
)
3575 spin_lock_irqsave(ap
->lock
, flags
);
3577 if (devno
== SCAN_WILD_CARD
) {
3578 struct ata_link
*link
;
3580 ata_port_for_each_link(link
, ap
) {
3581 struct ata_eh_info
*ehi
= &link
->eh_info
;
3582 ehi
->probe_mask
|= (1 << ata_link_max_devices(link
)) - 1;
3583 ehi
->action
|= ATA_EH_SOFTRESET
;
3586 struct ata_device
*dev
= ata_find_dev(ap
, devno
);
3589 struct ata_eh_info
*ehi
= &dev
->link
->eh_info
;
3590 ehi
->probe_mask
|= 1 << dev
->devno
;
3591 ehi
->action
|= ATA_EH_SOFTRESET
;
3592 ehi
->flags
|= ATA_EHI_RESUME_LINK
;
3598 ata_port_schedule_eh(ap
);
3599 spin_unlock_irqrestore(ap
->lock
, flags
);
3600 ata_port_wait_eh(ap
);
3602 spin_unlock_irqrestore(ap
->lock
, flags
);
3608 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3609 * @work: Pointer to ATA port to perform scsi_rescan_device()
3611 * After ATA pass thru (SAT) commands are executed successfully,
3612 * libata need to propagate the changes to SCSI layer. This
3613 * function must be executed from ata_aux_wq such that sdev
3614 * attach/detach don't race with rescan.
3617 * Kernel thread context (may sleep).
3619 void ata_scsi_dev_rescan(struct work_struct
*work
)
3621 struct ata_port
*ap
=
3622 container_of(work
, struct ata_port
, scsi_rescan_task
);
3623 struct ata_link
*link
;
3624 struct ata_device
*dev
;
3625 unsigned long flags
;
3627 spin_lock_irqsave(ap
->lock
, flags
);
3629 ata_port_for_each_link(link
, ap
) {
3630 ata_link_for_each_dev(dev
, link
) {
3631 struct scsi_device
*sdev
= dev
->sdev
;
3633 if (!ata_dev_enabled(dev
) || !sdev
)
3635 if (scsi_device_get(sdev
))
3638 spin_unlock_irqrestore(ap
->lock
, flags
);
3639 scsi_rescan_device(&(sdev
->sdev_gendev
));
3640 scsi_device_put(sdev
);
3641 spin_lock_irqsave(ap
->lock
, flags
);
3645 spin_unlock_irqrestore(ap
->lock
, flags
);
3649 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3650 * @host: ATA host container for all SAS ports
3651 * @port_info: Information from low-level host driver
3652 * @shost: SCSI host that the scsi device is attached to
3655 * PCI/etc. bus probe sem.
3658 * ata_port pointer on success / NULL on failure.
3661 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3662 struct ata_port_info
*port_info
,
3663 struct Scsi_Host
*shost
)
3665 struct ata_port
*ap
;
3667 ap
= ata_port_alloc(host
);
3672 ap
->lock
= shost
->host_lock
;
3673 ap
->pio_mask
= port_info
->pio_mask
;
3674 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3675 ap
->udma_mask
= port_info
->udma_mask
;
3676 ap
->flags
|= port_info
->flags
;
3677 ap
->ops
= port_info
->port_ops
;
3678 ap
->cbl
= ATA_CBL_SATA
;
3682 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3685 * ata_sas_port_start - Set port up for dma.
3686 * @ap: Port to initialize
3688 * Called just after data structures for each port are
3689 <<<<<<< HEAD:drivers/ata/libata-scsi.c
3690 * initialized. Allocates DMA pad.
3693 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ata/libata-scsi.c
3695 * May be used as the port_start() entry in ata_port_operations.
3698 * Inherited from caller.
3700 int ata_sas_port_start(struct ata_port
*ap
)
3702 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
3703 return ata_pad_alloc(ap
, ap
->dev
);
3706 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
3708 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3711 * ata_port_stop - Undo ata_sas_port_start()
3712 * @ap: Port to shut down
3714 <<<<<<< HEAD:drivers/ata/libata-scsi.c
3715 * Frees the DMA pad.
3718 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/ata/libata-scsi.c
3719 * May be used as the port_stop() entry in ata_port_operations.
3722 * Inherited from caller.
3725 void ata_sas_port_stop(struct ata_port
*ap
)
3727 <<<<<<< HEAD
:drivers
/ata
/libata
-scsi
.c
3728 ata_pad_free(ap
, ap
->dev
);
3730 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a
:drivers
/ata
/libata
-scsi
.c
3732 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3735 * ata_sas_port_init - Initialize a SATA device
3736 * @ap: SATA port to initialize
3739 * PCI/etc. bus probe sem.
3742 * Zero on success, non-zero on error.
3745 int ata_sas_port_init(struct ata_port
*ap
)
3747 int rc
= ap
->ops
->port_start(ap
);
3750 ap
->print_id
= ata_print_id
++;
3751 rc
= ata_bus_probe(ap
);
3756 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3759 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3760 * @ap: SATA port to destroy
3764 void ata_sas_port_destroy(struct ata_port
*ap
)
3766 if (ap
->ops
->port_stop
)
3767 ap
->ops
->port_stop(ap
);
3770 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3773 * ata_sas_slave_configure - Default slave_config routine for libata devices
3774 * @sdev: SCSI device to configure
3775 * @ap: ATA port to which SCSI device is attached
3781 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3783 ata_scsi_sdev_config(sdev
);
3784 ata_scsi_dev_config(sdev
, ap
->link
.device
);
3787 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3790 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3791 * @cmd: SCSI command to be sent
3792 * @done: Completion function, called when command is complete
3793 * @ap: ATA port to which the command is being sent
3796 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3800 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3801 struct ata_port
*ap
)
3805 ata_scsi_dump_cdb(ap
, cmd
);
3807 if (likely(ata_scsi_dev_enabled(ap
->link
.device
)))
3808 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->link
.device
);
3810 cmd
->result
= (DID_BAD_TARGET
<< 16);
3815 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);