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>
41 #include <scsi/scsi_host.h>
42 #include <linux/libata.h>
43 #include <asm/uaccess.h>
47 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
, u8
*scsicmd
);
48 static struct ata_device
*
49 ata_scsi_find_dev(struct ata_port
*ap
, struct scsi_device
*scsidev
);
53 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
54 * @sdev: SCSI device for which BIOS geometry is to be determined
55 * @bdev: block device associated with @sdev
56 * @capacity: capacity of SCSI device
57 * @geom: location to which geometry will be output
59 * Generic bios head/sector/cylinder calculator
60 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
61 * mapping. Some situations may arise where the disk is not
62 * bootable if this is not used.
65 * Defined by the SCSI layer. We don't really care.
70 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
71 sector_t capacity
, int geom
[])
75 sector_div(capacity
, 255*63);
81 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
84 struct ata_device
*dev
;
85 int val
= -EINVAL
, rc
= -EINVAL
;
87 ap
= (struct ata_port
*) &scsidev
->host
->hostdata
[0];
91 dev
= ata_scsi_find_dev(ap
, scsidev
);
98 case ATA_IOC_GET_IO32
:
100 if (copy_to_user(arg
, &val
, 1))
104 case ATA_IOC_SET_IO32
:
105 val
= (unsigned long) arg
;
120 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
121 * @ap: ATA port to which the new command is attached
122 * @dev: ATA device to which the new command is attached
123 * @cmd: SCSI command that originated this ATA command
124 * @done: SCSI command completion function
126 * Obtain a reference to an unused ata_queued_cmd structure,
127 * which is the basic libata structure representing a single
128 * ATA command sent to the hardware.
130 * If a command was available, fill in the SCSI-specific
131 * portions of the structure with information on the
135 * spin_lock_irqsave(host_set lock)
138 * Command allocated, or %NULL if none available.
140 struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_port
*ap
,
141 struct ata_device
*dev
,
142 struct scsi_cmnd
*cmd
,
143 void (*done
)(struct scsi_cmnd
*))
145 struct ata_queued_cmd
*qc
;
147 qc
= ata_qc_new_init(ap
, dev
);
153 qc
->sg
= (struct scatterlist
*) cmd
->request_buffer
;
154 qc
->n_elem
= cmd
->use_sg
;
160 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
168 * ata_to_sense_error - convert ATA error to SCSI error
169 * @qc: Command that we are erroring out
170 * @drv_stat: value contained in ATA status register
172 * Converts an ATA error into a SCSI error. While we are at it
173 * we decode and dump the ATA error for the user so that they
174 * have some idea what really happened at the non make-believe
178 * spin_lock_irqsave(host_set lock)
181 void ata_to_sense_error(struct ata_queued_cmd
*qc
, u8 drv_stat
)
183 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
185 unsigned char *sb
= cmd
->sense_buffer
;
186 /* Based on the 3ware driver translation table */
187 static unsigned char sense_table
[][4] = {
189 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
191 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
193 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
194 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
195 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
196 /* MC|ID|ABRT|TRK0|MARK */
197 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
199 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
200 /* Bad address mark */
201 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
203 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
205 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
206 /* Media change request */
207 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
209 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
211 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
213 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
214 /* BBD - block marked bad */
215 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
216 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
218 static unsigned char stat_table
[][4] = {
219 /* Must be first because BUSY means no other bits valid */
220 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
221 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
222 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
223 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
224 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
228 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
231 * Is this an error we can process/parse
234 if(drv_stat
& ATA_ERR
)
235 /* Read the err bits */
236 err
= ata_chk_err(qc
->ap
);
238 /* Display the ATA level error info */
240 printk(KERN_WARNING
"ata%u: status=0x%02x { ", qc
->ap
->id
, drv_stat
);
244 err
= 0; /* Data is not valid in this case */
247 if(drv_stat
& 0x40) printk("DriveReady ");
248 if(drv_stat
& 0x20) printk("DeviceFault ");
249 if(drv_stat
& 0x10) printk("SeekComplete ");
250 if(drv_stat
& 0x08) printk("DataRequest ");
251 if(drv_stat
& 0x04) printk("CorrectedError ");
252 if(drv_stat
& 0x02) printk("Index ");
253 if(drv_stat
& 0x01) printk("Error ");
259 printk(KERN_WARNING
"ata%u: error=0x%02x { ", qc
->ap
->id
, err
);
260 if(err
& 0x04) printk("DriveStatusError ");
268 if(err
& 0x40) printk("UncorrectableError ");
269 if(err
& 0x10) printk("SectorIdNotFound ");
270 if(err
& 0x02) printk("TrackZeroNotFound ");
271 if(err
& 0x01) printk("AddrMarkNotFound ");
274 /* Should we dump sector info here too ?? */
279 while(sense_table
[i
][0] != 0xFF)
281 /* Look for best matches first */
282 if((sense_table
[i
][0] & err
) == sense_table
[i
][0])
285 sb
[2] = sense_table
[i
][1];
287 sb
[12] = sense_table
[i
][2];
288 sb
[13] = sense_table
[i
][3];
293 /* No immediate match */
295 printk(KERN_DEBUG
"ata%u: no sense translation for 0x%02x\n", qc
->ap
->id
, err
);
298 /* Fall back to interpreting status bits */
299 while(stat_table
[i
][0] != 0xFF)
301 if(stat_table
[i
][0] & drv_stat
)
304 sb
[2] = stat_table
[i
][1];
306 sb
[12] = stat_table
[i
][2];
307 sb
[13] = stat_table
[i
][3];
313 printk(KERN_ERR
"ata%u: called with no error (%02X)!\n", qc
->ap
->id
, drv_stat
);
314 /* additional-sense-code[-qualifier] */
317 sb
[2] = MEDIUM_ERROR
;
319 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
) {
320 sb
[12] = 0x11; /* "unrecovered read error" */
323 sb
[12] = 0x0C; /* "write error - */
324 sb
[13] = 0x02; /* auto-reallocation failed" */
329 * ata_scsi_slave_config - Set SCSI device attributes
330 * @sdev: SCSI device to examine
332 * This is called before we actually start reading
333 * and writing to the device, to configure certain
334 * SCSI mid-layer behaviors.
337 * Defined by SCSI layer. We don't really care.
340 int ata_scsi_slave_config(struct scsi_device
*sdev
)
342 sdev
->use_10_for_rw
= 1;
343 sdev
->use_10_for_ms
= 1;
345 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
347 if (sdev
->id
< ATA_MAX_DEVICES
) {
349 struct ata_device
*dev
;
351 ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
352 dev
= &ap
->device
[sdev
->id
];
354 /* TODO: 1024 is an arbitrary number, not the
355 * hardware maximum. This should be increased to
356 * 65534 when Jens Axboe's patch for dynamically
357 * determining max_sectors is merged.
359 if ((dev
->flags
& ATA_DFLAG_LBA48
) &&
360 ((dev
->flags
& ATA_DFLAG_LOCK_SECTORS
) == 0)) {
362 * do not overwrite sdev->host->max_sectors, since
363 * other drives on this host may not support LBA48
365 blk_queue_max_sectors(sdev
->request_queue
, 2048);
369 return 0; /* scsi layer doesn't check return value, sigh */
373 * ata_scsi_error - SCSI layer error handler callback
374 * @host: SCSI host on which error occurred
376 * Handles SCSI-layer-thrown error events.
379 * Inherited from SCSI layer (none, can sleep)
385 int ata_scsi_error(struct Scsi_Host
*host
)
391 ap
= (struct ata_port
*) &host
->hostdata
[0];
392 ap
->ops
->eng_timeout(ap
);
394 /* TODO: this is per-command; when queueing is supported
395 * this code will either change or move to a more
399 INIT_LIST_HEAD(&host
->eh_cmd_q
);
406 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
407 * @qc: Storage for translated ATA taskfile
408 * @scsicmd: SCSI command to translate
410 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
411 * (to start). Perhaps these commands should be preceded by
412 * CHECK POWER MODE to see what power mode the device is already in.
413 * [See SAT revision 5 at www.t10.org]
416 * spin_lock_irqsave(host_set lock)
419 * Zero on success, non-zero on error.
422 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
425 struct ata_taskfile
*tf
= &qc
->tf
;
427 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
428 tf
->protocol
= ATA_PROT_NODATA
;
429 if (scsicmd
[1] & 0x1) {
430 ; /* ignore IMMED bit, violates sat-r05 */
432 if (scsicmd
[4] & 0x2)
433 return 1; /* LOEJ bit set not supported */
434 if (((scsicmd
[4] >> 4) & 0xf) != 0)
435 return 1; /* power conditions not supported */
436 if (scsicmd
[4] & 0x1) {
437 tf
->nsect
= 1; /* 1 sector, lba=0 */
441 tf
->device
|= ATA_LBA
;
442 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
444 tf
->nsect
= 0; /* time period value (0 implies now) */
445 tf
->command
= ATA_CMD_STANDBY
;
446 /* Consider: ATA STANDBY IMMEDIATE command */
449 * Standby and Idle condition timers could be implemented but that
450 * would require libata to implement the Power condition mode page
451 * and allow the user to change it. Changing mode pages requires
452 * MODE SELECT to be implemented.
460 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
461 * @qc: Storage for translated ATA taskfile
462 * @scsicmd: SCSI command to translate (ignored)
464 * Sets up an ATA taskfile to issue FLUSH CACHE or
468 * spin_lock_irqsave(host_set lock)
471 * Zero on success, non-zero on error.
474 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
476 struct ata_taskfile
*tf
= &qc
->tf
;
478 tf
->flags
|= ATA_TFLAG_DEVICE
;
479 tf
->protocol
= ATA_PROT_NODATA
;
481 if ((tf
->flags
& ATA_TFLAG_LBA48
) &&
482 (ata_id_has_flush_ext(qc
->dev
->id
)))
483 tf
->command
= ATA_CMD_FLUSH_EXT
;
485 tf
->command
= ATA_CMD_FLUSH
;
491 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
492 * @qc: Storage for translated ATA taskfile
493 * @scsicmd: SCSI command to translate
495 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
498 * spin_lock_irqsave(host_set lock)
501 * Zero on success, non-zero on error.
504 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
506 struct ata_taskfile
*tf
= &qc
->tf
;
507 struct ata_device
*dev
= qc
->dev
;
508 unsigned int lba
= tf
->flags
& ATA_TFLAG_LBA
;
509 unsigned int lba48
= tf
->flags
& ATA_TFLAG_LBA48
;
510 u64 dev_sectors
= qc
->dev
->n_sectors
;
514 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
515 tf
->protocol
= ATA_PROT_NODATA
;
517 if (scsicmd
[0] == VERIFY
) {
518 block
|= ((u64
)scsicmd
[2]) << 24;
519 block
|= ((u64
)scsicmd
[3]) << 16;
520 block
|= ((u64
)scsicmd
[4]) << 8;
521 block
|= ((u64
)scsicmd
[5]);
523 n_block
|= ((u32
)scsicmd
[7]) << 8;
524 n_block
|= ((u32
)scsicmd
[8]);
527 else if (scsicmd
[0] == VERIFY_16
) {
528 block
|= ((u64
)scsicmd
[2]) << 56;
529 block
|= ((u64
)scsicmd
[3]) << 48;
530 block
|= ((u64
)scsicmd
[4]) << 40;
531 block
|= ((u64
)scsicmd
[5]) << 32;
532 block
|= ((u64
)scsicmd
[6]) << 24;
533 block
|= ((u64
)scsicmd
[7]) << 16;
534 block
|= ((u64
)scsicmd
[8]) << 8;
535 block
|= ((u64
)scsicmd
[9]);
537 n_block
|= ((u32
)scsicmd
[10]) << 24;
538 n_block
|= ((u32
)scsicmd
[11]) << 16;
539 n_block
|= ((u32
)scsicmd
[12]) << 8;
540 n_block
|= ((u32
)scsicmd
[13]);
548 if (block
>= dev_sectors
)
550 if ((block
+ n_block
) > dev_sectors
)
553 if (n_block
> (64 * 1024))
562 tf
->command
= ATA_CMD_VERIFY_EXT
;
564 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
566 tf
->hob_lbah
= (block
>> 40) & 0xff;
567 tf
->hob_lbam
= (block
>> 32) & 0xff;
568 tf
->hob_lbal
= (block
>> 24) & 0xff;
570 tf
->command
= ATA_CMD_VERIFY
;
572 tf
->device
|= (block
>> 24) & 0xf;
575 tf
->nsect
= n_block
& 0xff;
577 tf
->lbah
= (block
>> 16) & 0xff;
578 tf
->lbam
= (block
>> 8) & 0xff;
579 tf
->lbal
= block
& 0xff;
581 tf
->device
|= ATA_LBA
;
584 u32 sect
, head
, cyl
, track
;
586 /* Convert LBA to CHS */
587 track
= (u32
)block
/ dev
->sectors
;
588 cyl
= track
/ dev
->heads
;
589 head
= track
% dev
->heads
;
590 sect
= (u32
)block
% dev
->sectors
+ 1;
592 DPRINTK("block[%u] track[%u] cyl[%u] head[%u] sect[%u] \n", (u32
)block
, track
, cyl
, head
, sect
);
594 /* Check whether the converted CHS can fit.
598 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
601 tf
->command
= ATA_CMD_VERIFY
;
602 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
613 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
614 * @qc: Storage for translated ATA taskfile
615 * @scsicmd: SCSI command to translate
617 * Converts any of six SCSI read/write commands into the
618 * ATA counterpart, including starting sector (LBA),
619 * sector count, and taking into account the device's LBA48
622 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
623 * %WRITE_16 are currently supported.
626 * spin_lock_irqsave(host_set lock)
629 * Zero on success, non-zero on error.
632 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
634 struct ata_taskfile
*tf
= &qc
->tf
;
635 struct ata_device
*dev
= qc
->dev
;
636 unsigned int lba
= tf
->flags
& ATA_TFLAG_LBA
;
637 unsigned int lba48
= tf
->flags
& ATA_TFLAG_LBA48
;
641 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
642 tf
->protocol
= qc
->dev
->xfer_protocol
;
644 if (scsicmd
[0] == READ_10
|| scsicmd
[0] == READ_6
||
645 scsicmd
[0] == READ_16
) {
646 tf
->command
= qc
->dev
->read_cmd
;
648 tf
->command
= qc
->dev
->write_cmd
;
649 tf
->flags
|= ATA_TFLAG_WRITE
;
652 /* Calculate the SCSI LBA and transfer length. */
653 if (scsicmd
[0] == READ_10
|| scsicmd
[0] == WRITE_10
) {
654 block
|= ((u64
)scsicmd
[2]) << 24;
655 block
|= ((u64
)scsicmd
[3]) << 16;
656 block
|= ((u64
)scsicmd
[4]) << 8;
657 block
|= ((u64
)scsicmd
[5]);
659 n_block
|= ((u32
)scsicmd
[7]) << 8;
660 n_block
|= ((u32
)scsicmd
[8]);
662 VPRINTK("ten-byte command\n");
663 } else if (scsicmd
[0] == READ_6
|| scsicmd
[0] == WRITE_6
) {
664 block
|= ((u64
)scsicmd
[2]) << 8;
665 block
|= ((u64
)scsicmd
[3]);
667 n_block
|= ((u32
)scsicmd
[4]);
671 VPRINTK("six-byte command\n");
672 } else if (scsicmd
[0] == READ_16
|| scsicmd
[0] == WRITE_16
) {
673 block
|= ((u64
)scsicmd
[2]) << 56;
674 block
|= ((u64
)scsicmd
[3]) << 48;
675 block
|= ((u64
)scsicmd
[4]) << 40;
676 block
|= ((u64
)scsicmd
[5]) << 32;
677 block
|= ((u64
)scsicmd
[6]) << 24;
678 block
|= ((u64
)scsicmd
[7]) << 16;
679 block
|= ((u64
)scsicmd
[8]) << 8;
680 block
|= ((u64
)scsicmd
[9]);
682 n_block
|= ((u32
)scsicmd
[10]) << 24;
683 n_block
|= ((u32
)scsicmd
[11]) << 16;
684 n_block
|= ((u32
)scsicmd
[12]) << 8;
685 n_block
|= ((u32
)scsicmd
[13]);
687 VPRINTK("sixteen-byte command\n");
689 DPRINTK("no-byte command\n");
693 /* Check and compose ATA command */
695 /* In ATA, sector count 0 means 256 or 65536 sectors, not 0 sectors. */
700 /* The request -may- be too large for LBA48. */
701 if ((block
>> 48) || (n_block
> 65536))
704 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
706 tf
->hob_lbah
= (block
>> 40) & 0xff;
707 tf
->hob_lbam
= (block
>> 32) & 0xff;
708 tf
->hob_lbal
= (block
>> 24) & 0xff;
712 /* The request -may- be too large for LBA28. */
713 if ((block
>> 28) || (n_block
> 256))
716 tf
->device
|= (block
>> 24) & 0xf;
720 tf
->nsect
= n_block
& 0xff;
722 tf
->lbah
= (block
>> 16) & 0xff;
723 tf
->lbam
= (block
>> 8) & 0xff;
724 tf
->lbal
= block
& 0xff;
726 tf
->device
|= ATA_LBA
;
729 u32 sect
, head
, cyl
, track
;
731 /* The request -may- be too large for CHS addressing. */
732 if ((block
>> 28) || (n_block
> 256))
735 /* Convert LBA to CHS */
736 track
= (u32
)block
/ dev
->sectors
;
737 cyl
= track
/ dev
->heads
;
738 head
= track
% dev
->heads
;
739 sect
= (u32
)block
% dev
->sectors
+ 1;
741 DPRINTK("block[%u] track[%u] cyl[%u] head[%u] sect[%u] \n",
742 (u32
)block
, track
, cyl
, head
, sect
);
744 /* Check whether the converted CHS can fit.
748 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
752 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
762 static int ata_scsi_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
764 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
766 if (unlikely(drv_stat
& (ATA_ERR
| ATA_BUSY
| ATA_DRQ
)))
767 ata_to_sense_error(qc
, drv_stat
);
769 cmd
->result
= SAM_STAT_GOOD
;
777 * ata_scsi_translate - Translate then issue SCSI command to ATA device
778 * @ap: ATA port to which the command is addressed
779 * @dev: ATA device to which the command is addressed
780 * @cmd: SCSI command to execute
781 * @done: SCSI command completion function
782 * @xlat_func: Actor which translates @cmd to an ATA taskfile
784 * Our ->queuecommand() function has decided that the SCSI
785 * command issued can be directly translated into an ATA
786 * command, rather than handled internally.
788 * This function sets up an ata_queued_cmd structure for the
789 * SCSI command, and sends that ata_queued_cmd to the hardware.
792 * spin_lock_irqsave(host_set lock)
795 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
796 struct scsi_cmnd
*cmd
,
797 void (*done
)(struct scsi_cmnd
*),
798 ata_xlat_func_t xlat_func
)
800 struct ata_queued_cmd
*qc
;
801 u8
*scsicmd
= cmd
->cmnd
;
805 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
809 /* data is present; dma-map it */
810 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
811 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
812 if (unlikely(cmd
->request_bufflen
< 1)) {
813 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
819 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
821 ata_sg_init_one(qc
, cmd
->request_buffer
,
822 cmd
->request_bufflen
);
824 qc
->dma_dir
= cmd
->sc_data_direction
;
827 qc
->complete_fn
= ata_scsi_qc_complete
;
829 if (xlat_func(qc
, scsicmd
))
832 /* select device, send command to hardware */
833 if (ata_qc_issue(qc
))
841 ata_bad_cdb(cmd
, done
);
842 DPRINTK("EXIT - badcmd\n");
846 * ata_scsi_rbuf_get - Map response buffer.
847 * @cmd: SCSI command containing buffer to be mapped.
848 * @buf_out: Pointer to mapped area.
850 * Maps buffer contained within SCSI command @cmd.
853 * spin_lock_irqsave(host_set lock)
856 * Length of response buffer.
859 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
865 struct scatterlist
*sg
;
867 sg
= (struct scatterlist
*) cmd
->request_buffer
;
868 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
871 buf
= cmd
->request_buffer
;
872 buflen
= cmd
->request_bufflen
;
880 * ata_scsi_rbuf_put - Unmap response buffer.
881 * @cmd: SCSI command containing buffer to be unmapped.
882 * @buf: buffer to unmap
884 * Unmaps response buffer contained within @cmd.
887 * spin_lock_irqsave(host_set lock)
890 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
893 struct scatterlist
*sg
;
895 sg
= (struct scatterlist
*) cmd
->request_buffer
;
896 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
901 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
902 * @args: device IDENTIFY data / SCSI command of interest.
903 * @actor: Callback hook for desired SCSI command simulator
905 * Takes care of the hard work of simulating a SCSI command...
906 * Mapping the response buffer, calling the command's handler,
907 * and handling the handler's return value. This return value
908 * indicates whether the handler wishes the SCSI command to be
909 * completed successfully, or not.
912 * spin_lock_irqsave(host_set lock)
915 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
916 unsigned int (*actor
) (struct ata_scsi_args
*args
,
917 u8
*rbuf
, unsigned int buflen
))
920 unsigned int buflen
, rc
;
921 struct scsi_cmnd
*cmd
= args
->cmd
;
923 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
924 memset(rbuf
, 0, buflen
);
925 rc
= actor(args
, rbuf
, buflen
);
926 ata_scsi_rbuf_put(cmd
, rbuf
);
929 ata_bad_cdb(cmd
, args
->done
);
931 cmd
->result
= SAM_STAT_GOOD
;
937 * ata_scsiop_inq_std - Simulate INQUIRY command
938 * @args: device IDENTIFY data / SCSI command of interest.
939 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
940 * @buflen: Response buffer length.
942 * Returns standard device identification data associated
943 * with non-EVPD INQUIRY command output.
946 * spin_lock_irqsave(host_set lock)
949 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
955 0x5, /* claim SPC-3 version compatibility */
960 /* set scsi removeable (RMB) bit per ata bit */
961 if (ata_id_removeable(args
->id
))
966 memcpy(rbuf
, hdr
, sizeof(hdr
));
969 memcpy(&rbuf
[8], "ATA ", 8);
970 ata_dev_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
971 ata_dev_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
972 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
973 memcpy(&rbuf
[32], "n/a ", 4);
977 const u8 versions
[] = {
978 0x60, /* SAM-3 (no version claimed) */
981 0x20, /* SBC-2 (no version claimed) */
984 0x60 /* SPC-3 (no version claimed) */
987 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
994 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
995 * @args: device IDENTIFY data / SCSI command of interest.
996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
997 * @buflen: Response buffer length.
999 * Returns list of inquiry EVPD pages available.
1002 * spin_lock_irqsave(host_set lock)
1005 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1006 unsigned int buflen
)
1008 const u8 pages
[] = {
1009 0x00, /* page 0x00, this page */
1010 0x80, /* page 0x80, unit serial no page */
1011 0x83 /* page 0x83, device ident page */
1013 rbuf
[3] = sizeof(pages
); /* number of supported EVPD pages */
1016 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1022 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1023 * @args: device IDENTIFY data / SCSI command of interest.
1024 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1025 * @buflen: Response buffer length.
1027 * Returns ATA device serial number.
1030 * spin_lock_irqsave(host_set lock)
1033 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1034 unsigned int buflen
)
1038 0x80, /* this page code */
1040 ATA_SERNO_LEN
, /* page len */
1042 memcpy(rbuf
, hdr
, sizeof(hdr
));
1044 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1045 ata_dev_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1046 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1051 static const char *inq_83_str
= "Linux ATA-SCSI simulator";
1054 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1055 * @args: device IDENTIFY data / SCSI command of interest.
1056 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1057 * @buflen: Response buffer length.
1059 * Returns device identification. Currently hardcoded to
1060 * return "Linux ATA-SCSI simulator".
1063 * spin_lock_irqsave(host_set lock)
1066 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1067 unsigned int buflen
)
1069 rbuf
[1] = 0x83; /* this page code */
1070 rbuf
[3] = 4 + strlen(inq_83_str
); /* page len */
1072 /* our one and only identification descriptor (vendor-specific) */
1073 if (buflen
> (strlen(inq_83_str
) + 4 + 4 - 1)) {
1074 rbuf
[4 + 0] = 2; /* code set: ASCII */
1075 rbuf
[4 + 3] = strlen(inq_83_str
);
1076 memcpy(rbuf
+ 4 + 4, inq_83_str
, strlen(inq_83_str
));
1083 * ata_scsiop_noop - Command handler that simply returns success.
1084 * @args: device IDENTIFY data / SCSI command of interest.
1085 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1086 * @buflen: Response buffer length.
1088 * No operation. Simply returns success to caller, to indicate
1089 * that the caller should successfully complete this SCSI command.
1092 * spin_lock_irqsave(host_set lock)
1095 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1096 unsigned int buflen
)
1103 * ata_msense_push - Push data onto MODE SENSE data output buffer
1104 * @ptr_io: (input/output) Location to store more output data
1105 * @last: End of output data buffer
1106 * @buf: Pointer to BLOB being added to output buffer
1107 * @buflen: Length of BLOB
1109 * Store MODE SENSE data on an output buffer.
1115 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1116 const u8
*buf
, unsigned int buflen
)
1120 if ((ptr
+ buflen
- 1) > last
)
1123 memcpy(ptr
, buf
, buflen
);
1131 * ata_msense_caching - Simulate MODE SENSE caching info page
1132 * @id: device IDENTIFY data
1133 * @ptr_io: (input/output) Location to store more output data
1134 * @last: End of output data buffer
1136 * Generate a caching info page, which conditionally indicates
1137 * write caching to the SCSI layer, depending on device
1144 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1148 0x8, /* page code */
1149 0x12, /* page length */
1150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */
1151 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */
1154 if (ata_id_wcache_enabled(id
))
1155 page
[2] |= (1 << 2); /* write cache enable */
1156 if (!ata_id_rahead_enabled(id
))
1157 page
[12] |= (1 << 5); /* disable read ahead */
1159 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1160 return sizeof(page
);
1164 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1165 * @dev: Device associated with this MODE SENSE command
1166 * @ptr_io: (input/output) Location to store more output data
1167 * @last: End of output data buffer
1169 * Generate a generic MODE SENSE control mode page.
1175 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1177 const u8 page
[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30};
1179 /* byte 2: set the descriptor format sense data bit (bit 2)
1180 * since we need to support returning this format for SAT
1181 * commands and any SCSI commands against a 48b LBA device.
1184 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1185 return sizeof(page
);
1189 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1190 * @dev: Device associated with this MODE SENSE command
1191 * @ptr_io: (input/output) Location to store more output data
1192 * @last: End of output data buffer
1194 * Generate a generic MODE SENSE r/w error recovery page.
1200 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1203 0x1, /* page code */
1204 0xa, /* page length */
1205 (1 << 7) | (1 << 6), /* note auto r/w reallocation */
1206 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */
1209 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1210 return sizeof(page
);
1214 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1215 * @args: device IDENTIFY data / SCSI command of interest.
1216 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1217 * @buflen: Response buffer length.
1219 * Simulate MODE SENSE commands.
1222 * spin_lock_irqsave(host_set lock)
1225 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1226 unsigned int buflen
)
1228 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1229 unsigned int page_control
, six_byte
, output_len
;
1233 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1235 /* we only support saved and current values (which we treat
1236 * in the same manner)
1238 page_control
= scsicmd
[2] >> 6;
1239 if ((page_control
!= 0) && (page_control
!= 3))
1247 p
= rbuf
+ output_len
;
1248 last
= rbuf
+ buflen
- 1;
1250 switch(scsicmd
[2] & 0x3f) {
1251 case 0x01: /* r/w error recovery */
1252 output_len
+= ata_msense_rw_recovery(&p
, last
);
1255 case 0x08: /* caching */
1256 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1259 case 0x0a: { /* control mode */
1260 output_len
+= ata_msense_ctl_mode(&p
, last
);
1264 case 0x3f: /* all pages */
1265 output_len
+= ata_msense_rw_recovery(&p
, last
);
1266 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1267 output_len
+= ata_msense_ctl_mode(&p
, last
);
1270 default: /* invalid page code */
1276 rbuf
[0] = output_len
;
1279 rbuf
[0] = output_len
>> 8;
1280 rbuf
[1] = output_len
;
1287 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1288 * @args: device IDENTIFY data / SCSI command of interest.
1289 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1290 * @buflen: Response buffer length.
1292 * Simulate READ CAPACITY commands.
1295 * spin_lock_irqsave(host_set lock)
1298 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1299 unsigned int buflen
)
1306 if (ata_id_has_lba(args
->id
)) {
1307 if (ata_id_has_lba48(args
->id
))
1308 n_sectors
= ata_id_u64(args
->id
, 100);
1310 n_sectors
= ata_id_u32(args
->id
, 60);
1312 /* CHS default translation */
1313 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1315 if (ata_id_current_chs_valid(args
->id
))
1316 /* CHS current translation */
1317 n_sectors
= ata_id_u32(args
->id
, 57);
1320 n_sectors
--; /* ATA TotalUserSectors - 1 */
1322 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1323 if( n_sectors
>= 0xffffffffULL
)
1324 tmp
= 0xffffffff ; /* Return max count on overflow */
1328 /* sector count, 32-bit */
1329 rbuf
[0] = tmp
>> (8 * 3);
1330 rbuf
[1] = tmp
>> (8 * 2);
1331 rbuf
[2] = tmp
>> (8 * 1);
1335 tmp
= ATA_SECT_SIZE
;
1340 /* sector count, 64-bit */
1341 tmp
= n_sectors
>> (8 * 4);
1342 rbuf
[2] = tmp
>> (8 * 3);
1343 rbuf
[3] = tmp
>> (8 * 2);
1344 rbuf
[4] = tmp
>> (8 * 1);
1347 rbuf
[6] = tmp
>> (8 * 3);
1348 rbuf
[7] = tmp
>> (8 * 2);
1349 rbuf
[8] = tmp
>> (8 * 1);
1353 tmp
= ATA_SECT_SIZE
;
1354 rbuf
[12] = tmp
>> 8;
1362 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1363 * @args: device IDENTIFY data / SCSI command of interest.
1364 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1365 * @buflen: Response buffer length.
1367 * Simulate REPORT LUNS command.
1370 * spin_lock_irqsave(host_set lock)
1373 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1374 unsigned int buflen
)
1377 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1383 * ata_scsi_badcmd - End a SCSI request with an error
1384 * @cmd: SCSI request to be handled
1385 * @done: SCSI command completion function
1386 * @asc: SCSI-defined additional sense code
1387 * @ascq: SCSI-defined additional sense code qualifier
1389 * Helper function that completes a SCSI command with
1390 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1391 * and the specified additional sense codes.
1394 * spin_lock_irqsave(host_set lock)
1397 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
1400 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1402 cmd
->sense_buffer
[0] = 0x70;
1403 cmd
->sense_buffer
[2] = ILLEGAL_REQUEST
;
1404 cmd
->sense_buffer
[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */
1405 cmd
->sense_buffer
[12] = asc
;
1406 cmd
->sense_buffer
[13] = ascq
;
1411 static int atapi_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
1413 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1415 if (unlikely(drv_stat
& (ATA_ERR
| ATA_BUSY
| ATA_DRQ
))) {
1416 DPRINTK("request check condition\n");
1418 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1424 u8
*scsicmd
= cmd
->cmnd
;
1426 if (scsicmd
[0] == INQUIRY
) {
1428 unsigned int buflen
;
1430 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
1432 buf
[3] = (buf
[3] & 0xf0) | 2;
1433 ata_scsi_rbuf_put(cmd
, buf
);
1435 cmd
->result
= SAM_STAT_GOOD
;
1443 * atapi_xlat - Initialize PACKET taskfile
1444 * @qc: command structure to be initialized
1445 * @scsicmd: SCSI CDB associated with this PACKET command
1448 * spin_lock_irqsave(host_set lock)
1451 * Zero on success, non-zero on failure.
1454 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
1456 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1457 struct ata_device
*dev
= qc
->dev
;
1458 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
1459 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
1462 /* Check whether ATAPI DMA is safe */
1463 if (ata_check_atapi_dma(qc
))
1466 memcpy(&qc
->cdb
, scsicmd
, qc
->ap
->cdb_len
);
1468 qc
->complete_fn
= atapi_qc_complete
;
1470 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1471 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1472 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
1473 DPRINTK("direction: write\n");
1476 qc
->tf
.command
= ATA_CMD_PACKET
;
1478 /* no data, or PIO data xfer */
1479 if (using_pio
|| nodata
) {
1481 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
1483 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
1484 qc
->tf
.lbam
= (8 * 1024) & 0xff;
1485 qc
->tf
.lbah
= (8 * 1024) >> 8;
1490 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
1491 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
1493 #ifdef ATAPI_ENABLE_DMADIR
1494 /* some SATA bridges need us to indicate data xfer direction */
1495 if (cmd
->sc_data_direction
!= DMA_TO_DEVICE
)
1496 qc
->tf
.feature
|= ATAPI_DMADIR
;
1500 qc
->nbytes
= cmd
->bufflen
;
1506 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
1507 * @ap: ATA port to which the device is attached
1508 * @scsidev: SCSI device from which we derive the ATA device
1510 * Given various information provided in struct scsi_cmnd,
1511 * map that onto an ATA bus, and using that mapping
1512 * determine which ata_device is associated with the
1513 * SCSI command to be sent.
1516 * spin_lock_irqsave(host_set lock)
1519 * Associated ATA device, or %NULL if not found.
1522 static struct ata_device
*
1523 ata_scsi_find_dev(struct ata_port
*ap
, struct scsi_device
*scsidev
)
1525 struct ata_device
*dev
;
1527 /* skip commands not addressed to targets we simulate */
1528 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
1529 dev
= &ap
->device
[scsidev
->id
];
1533 if (unlikely((scsidev
->channel
!= 0) ||
1534 (scsidev
->lun
!= 0)))
1537 if (unlikely(!ata_dev_present(dev
)))
1540 if (!atapi_enabled
) {
1541 if (unlikely(dev
->class == ATA_DEV_ATAPI
))
1549 * ata_get_xlat_func - check if SCSI to ATA translation is possible
1551 * @cmd: SCSI command opcode to consider
1553 * Look up the SCSI command given, and determine whether the
1554 * SCSI command is to be translated or simulated.
1557 * Pointer to translation function if possible, %NULL if not.
1560 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
1570 return ata_scsi_rw_xlat
;
1572 case SYNCHRONIZE_CACHE
:
1573 if (ata_try_flush_cache(dev
))
1574 return ata_scsi_flush_xlat
;
1579 return ata_scsi_verify_xlat
;
1581 return ata_scsi_start_stop_xlat
;
1588 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
1589 * @ap: ATA port to which the command was being sent
1590 * @cmd: SCSI command to dump
1592 * Prints the contents of a SCSI command via printk().
1595 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
1596 struct scsi_cmnd
*cmd
)
1599 struct scsi_device
*scsidev
= cmd
->device
;
1600 u8
*scsicmd
= cmd
->cmnd
;
1602 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1604 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
1605 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
1606 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
1612 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
1613 * @cmd: SCSI command to be sent
1614 * @done: Completion function, called when command is complete
1616 * In some cases, this function translates SCSI commands into
1617 * ATA taskfiles, and queues the taskfiles to be sent to
1618 * hardware. In other cases, this function simulates a
1619 * SCSI device by evaluating and responding to certain
1620 * SCSI commands. This creates the overall effect of
1621 * ATA and ATAPI devices appearing as SCSI devices.
1624 * Releases scsi-layer-held lock, and obtains host_set lock.
1630 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
1632 struct ata_port
*ap
;
1633 struct ata_device
*dev
;
1634 struct scsi_device
*scsidev
= cmd
->device
;
1636 ap
= (struct ata_port
*) &scsidev
->host
->hostdata
[0];
1638 ata_scsi_dump_cdb(ap
, cmd
);
1640 dev
= ata_scsi_find_dev(ap
, scsidev
);
1641 if (unlikely(!dev
)) {
1642 cmd
->result
= (DID_BAD_TARGET
<< 16);
1647 if (dev
->class == ATA_DEV_ATA
) {
1648 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
1652 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
1654 ata_scsi_simulate(dev
->id
, cmd
, done
);
1656 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
1663 * ata_scsi_simulate - simulate SCSI command on ATA device
1664 * @id: current IDENTIFY data for target device.
1665 * @cmd: SCSI command being sent to device.
1666 * @done: SCSI command completion function.
1668 * Interprets and directly executes a select list of SCSI commands
1669 * that can be handled internally.
1672 * spin_lock_irqsave(host_set lock)
1675 void ata_scsi_simulate(u16
*id
,
1676 struct scsi_cmnd
*cmd
,
1677 void (*done
)(struct scsi_cmnd
*))
1679 struct ata_scsi_args args
;
1680 u8
*scsicmd
= cmd
->cmnd
;
1686 switch(scsicmd
[0]) {
1687 /* no-op's, complete with success */
1688 case SYNCHRONIZE_CACHE
:
1692 case TEST_UNIT_READY
:
1693 case FORMAT_UNIT
: /* FIXME: correct? */
1694 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
1695 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
1699 if (scsicmd
[1] & 2) /* is CmdDt set? */
1700 ata_bad_cdb(cmd
, done
);
1701 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
1702 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
1703 else if (scsicmd
[2] == 0x00)
1704 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
1705 else if (scsicmd
[2] == 0x80)
1706 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
1707 else if (scsicmd
[2] == 0x83)
1708 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
1710 ata_bad_cdb(cmd
, done
);
1715 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
1718 case MODE_SELECT
: /* unconditionally return */
1719 case MODE_SELECT_10
: /* bad-field-in-cdb */
1720 ata_bad_cdb(cmd
, done
);
1724 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
1727 case SERVICE_ACTION_IN
:
1728 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
1729 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
1731 ata_bad_cdb(cmd
, done
);
1735 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
1738 /* mandantory commands we haven't implemented yet */
1741 /* all other commands */
1743 ata_bad_scsiop(cmd
, done
);