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 */
439 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
440 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
445 tf
->device
|= ATA_LBA
;
448 tf
->lbal
= 0x1; /* sect */
449 tf
->lbam
= 0x0; /* cyl low */
450 tf
->lbah
= 0x0; /* cyl high */
453 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
455 tf
->nsect
= 0; /* time period value (0 implies now) */
456 tf
->command
= ATA_CMD_STANDBY
;
457 /* Consider: ATA STANDBY IMMEDIATE command */
460 * Standby and Idle condition timers could be implemented but that
461 * would require libata to implement the Power condition mode page
462 * and allow the user to change it. Changing mode pages requires
463 * MODE SELECT to be implemented.
471 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
472 * @qc: Storage for translated ATA taskfile
473 * @scsicmd: SCSI command to translate (ignored)
475 * Sets up an ATA taskfile to issue FLUSH CACHE or
479 * spin_lock_irqsave(host_set lock)
482 * Zero on success, non-zero on error.
485 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
487 struct ata_taskfile
*tf
= &qc
->tf
;
489 tf
->flags
|= ATA_TFLAG_DEVICE
;
490 tf
->protocol
= ATA_PROT_NODATA
;
492 if ((tf
->flags
& ATA_TFLAG_LBA48
) &&
493 (ata_id_has_flush_ext(qc
->dev
->id
)))
494 tf
->command
= ATA_CMD_FLUSH_EXT
;
496 tf
->command
= ATA_CMD_FLUSH
;
502 * scsi_6_lba_len - Get LBA and transfer length
503 * @scsicmd: SCSI command to translate
505 * Calculate LBA and transfer length for 6-byte commands.
509 * @plen: the transfer length
512 static void scsi_6_lba_len(u8
*scsicmd
, u64
*plba
, u32
*plen
)
517 VPRINTK("six-byte command\n");
519 lba
|= ((u64
)scsicmd
[2]) << 8;
520 lba
|= ((u64
)scsicmd
[3]);
522 len
|= ((u32
)scsicmd
[4]);
529 * scsi_10_lba_len - Get LBA and transfer length
530 * @scsicmd: SCSI command to translate
532 * Calculate LBA and transfer length for 10-byte commands.
536 * @plen: the transfer length
539 static void scsi_10_lba_len(u8
*scsicmd
, u64
*plba
, u32
*plen
)
544 VPRINTK("ten-byte command\n");
546 lba
|= ((u64
)scsicmd
[2]) << 24;
547 lba
|= ((u64
)scsicmd
[3]) << 16;
548 lba
|= ((u64
)scsicmd
[4]) << 8;
549 lba
|= ((u64
)scsicmd
[5]);
551 len
|= ((u32
)scsicmd
[7]) << 8;
552 len
|= ((u32
)scsicmd
[8]);
559 * scsi_16_lba_len - Get LBA and transfer length
560 * @scsicmd: SCSI command to translate
562 * Calculate LBA and transfer length for 16-byte commands.
566 * @plen: the transfer length
569 static void scsi_16_lba_len(u8
*scsicmd
, u64
*plba
, u32
*plen
)
574 VPRINTK("sixteen-byte command\n");
576 lba
|= ((u64
)scsicmd
[2]) << 56;
577 lba
|= ((u64
)scsicmd
[3]) << 48;
578 lba
|= ((u64
)scsicmd
[4]) << 40;
579 lba
|= ((u64
)scsicmd
[5]) << 32;
580 lba
|= ((u64
)scsicmd
[6]) << 24;
581 lba
|= ((u64
)scsicmd
[7]) << 16;
582 lba
|= ((u64
)scsicmd
[8]) << 8;
583 lba
|= ((u64
)scsicmd
[9]);
585 len
|= ((u32
)scsicmd
[10]) << 24;
586 len
|= ((u32
)scsicmd
[11]) << 16;
587 len
|= ((u32
)scsicmd
[12]) << 8;
588 len
|= ((u32
)scsicmd
[13]);
595 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
596 * @qc: Storage for translated ATA taskfile
597 * @scsicmd: SCSI command to translate
599 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
602 * spin_lock_irqsave(host_set lock)
605 * Zero on success, non-zero on error.
608 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
610 struct ata_taskfile
*tf
= &qc
->tf
;
611 struct ata_device
*dev
= qc
->dev
;
612 unsigned int lba
= tf
->flags
& ATA_TFLAG_LBA
;
613 unsigned int lba48
= tf
->flags
& ATA_TFLAG_LBA48
;
614 u64 dev_sectors
= qc
->dev
->n_sectors
;
618 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
619 tf
->protocol
= ATA_PROT_NODATA
;
621 if (scsicmd
[0] == VERIFY
)
622 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
623 else if (scsicmd
[0] == VERIFY_16
)
624 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
630 if (block
>= dev_sectors
)
632 if ((block
+ n_block
) > dev_sectors
)
635 if (n_block
> (64 * 1024))
644 tf
->command
= ATA_CMD_VERIFY_EXT
;
646 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
648 tf
->hob_lbah
= (block
>> 40) & 0xff;
649 tf
->hob_lbam
= (block
>> 32) & 0xff;
650 tf
->hob_lbal
= (block
>> 24) & 0xff;
652 tf
->command
= ATA_CMD_VERIFY
;
654 tf
->device
|= (block
>> 24) & 0xf;
657 tf
->nsect
= n_block
& 0xff;
659 tf
->lbah
= (block
>> 16) & 0xff;
660 tf
->lbam
= (block
>> 8) & 0xff;
661 tf
->lbal
= block
& 0xff;
663 tf
->device
|= ATA_LBA
;
666 u32 sect
, head
, cyl
, track
;
668 /* Convert LBA to CHS */
669 track
= (u32
)block
/ dev
->sectors
;
670 cyl
= track
/ dev
->heads
;
671 head
= track
% dev
->heads
;
672 sect
= (u32
)block
% dev
->sectors
+ 1;
674 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
675 (u32
)block
, track
, cyl
, head
, sect
);
677 /* Check whether the converted CHS can fit.
681 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
684 tf
->command
= ATA_CMD_VERIFY
;
685 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
696 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
697 * @qc: Storage for translated ATA taskfile
698 * @scsicmd: SCSI command to translate
700 * Converts any of six SCSI read/write commands into the
701 * ATA counterpart, including starting sector (LBA),
702 * sector count, and taking into account the device's LBA48
705 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
706 * %WRITE_16 are currently supported.
709 * spin_lock_irqsave(host_set lock)
712 * Zero on success, non-zero on error.
715 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
717 struct ata_taskfile
*tf
= &qc
->tf
;
718 struct ata_device
*dev
= qc
->dev
;
719 unsigned int lba
= tf
->flags
& ATA_TFLAG_LBA
;
720 unsigned int lba48
= tf
->flags
& ATA_TFLAG_LBA48
;
724 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
725 tf
->protocol
= qc
->dev
->xfer_protocol
;
727 if (scsicmd
[0] == READ_10
|| scsicmd
[0] == READ_6
||
728 scsicmd
[0] == READ_16
) {
729 tf
->command
= qc
->dev
->read_cmd
;
731 tf
->command
= qc
->dev
->write_cmd
;
732 tf
->flags
|= ATA_TFLAG_WRITE
;
735 /* Calculate the SCSI LBA and transfer length. */
736 switch (scsicmd
[0]) {
739 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
743 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
745 /* for 6-byte r/w commands, transfer length 0
746 * means 256 blocks of data, not 0 block.
753 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
756 DPRINTK("no-byte command\n");
760 /* Check and compose ATA command */
762 /* For 10-byte and 16-byte SCSI R/W commands, transfer
763 * length 0 means transfer 0 block of data.
764 * However, for ATA R/W commands, sector count 0 means
765 * 256 or 65536 sectors, not 0 sectors as in SCSI.
771 /* The request -may- be too large for LBA48. */
772 if ((block
>> 48) || (n_block
> 65536))
775 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
777 tf
->hob_lbah
= (block
>> 40) & 0xff;
778 tf
->hob_lbam
= (block
>> 32) & 0xff;
779 tf
->hob_lbal
= (block
>> 24) & 0xff;
783 /* The request -may- be too large for LBA28. */
784 if ((block
>> 28) || (n_block
> 256))
787 tf
->device
|= (block
>> 24) & 0xf;
791 tf
->nsect
= n_block
& 0xff;
793 tf
->lbah
= (block
>> 16) & 0xff;
794 tf
->lbam
= (block
>> 8) & 0xff;
795 tf
->lbal
= block
& 0xff;
797 tf
->device
|= ATA_LBA
;
800 u32 sect
, head
, cyl
, track
;
802 /* The request -may- be too large for CHS addressing. */
803 if ((block
>> 28) || (n_block
> 256))
806 /* Convert LBA to CHS */
807 track
= (u32
)block
/ dev
->sectors
;
808 cyl
= track
/ dev
->heads
;
809 head
= track
% dev
->heads
;
810 sect
= (u32
)block
% dev
->sectors
+ 1;
812 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
813 (u32
)block
, track
, cyl
, head
, sect
);
815 /* Check whether the converted CHS can fit.
819 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
823 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
833 static int ata_scsi_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
835 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
837 if (unlikely(drv_stat
& (ATA_ERR
| ATA_BUSY
| ATA_DRQ
)))
838 ata_to_sense_error(qc
, drv_stat
);
840 cmd
->result
= SAM_STAT_GOOD
;
848 * ata_scsi_translate - Translate then issue SCSI command to ATA device
849 * @ap: ATA port to which the command is addressed
850 * @dev: ATA device to which the command is addressed
851 * @cmd: SCSI command to execute
852 * @done: SCSI command completion function
853 * @xlat_func: Actor which translates @cmd to an ATA taskfile
855 * Our ->queuecommand() function has decided that the SCSI
856 * command issued can be directly translated into an ATA
857 * command, rather than handled internally.
859 * This function sets up an ata_queued_cmd structure for the
860 * SCSI command, and sends that ata_queued_cmd to the hardware.
863 * spin_lock_irqsave(host_set lock)
866 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
867 struct scsi_cmnd
*cmd
,
868 void (*done
)(struct scsi_cmnd
*),
869 ata_xlat_func_t xlat_func
)
871 struct ata_queued_cmd
*qc
;
872 u8
*scsicmd
= cmd
->cmnd
;
876 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
880 /* data is present; dma-map it */
881 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
882 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
883 if (unlikely(cmd
->request_bufflen
< 1)) {
884 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
890 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
892 ata_sg_init_one(qc
, cmd
->request_buffer
,
893 cmd
->request_bufflen
);
895 qc
->dma_dir
= cmd
->sc_data_direction
;
898 qc
->complete_fn
= ata_scsi_qc_complete
;
900 if (xlat_func(qc
, scsicmd
))
903 /* select device, send command to hardware */
904 if (ata_qc_issue(qc
))
912 ata_bad_cdb(cmd
, done
);
913 DPRINTK("EXIT - badcmd\n");
917 * ata_scsi_rbuf_get - Map response buffer.
918 * @cmd: SCSI command containing buffer to be mapped.
919 * @buf_out: Pointer to mapped area.
921 * Maps buffer contained within SCSI command @cmd.
924 * spin_lock_irqsave(host_set lock)
927 * Length of response buffer.
930 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
936 struct scatterlist
*sg
;
938 sg
= (struct scatterlist
*) cmd
->request_buffer
;
939 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
942 buf
= cmd
->request_buffer
;
943 buflen
= cmd
->request_bufflen
;
951 * ata_scsi_rbuf_put - Unmap response buffer.
952 * @cmd: SCSI command containing buffer to be unmapped.
953 * @buf: buffer to unmap
955 * Unmaps response buffer contained within @cmd.
958 * spin_lock_irqsave(host_set lock)
961 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
964 struct scatterlist
*sg
;
966 sg
= (struct scatterlist
*) cmd
->request_buffer
;
967 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
972 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
973 * @args: device IDENTIFY data / SCSI command of interest.
974 * @actor: Callback hook for desired SCSI command simulator
976 * Takes care of the hard work of simulating a SCSI command...
977 * Mapping the response buffer, calling the command's handler,
978 * and handling the handler's return value. This return value
979 * indicates whether the handler wishes the SCSI command to be
980 * completed successfully, or not.
983 * spin_lock_irqsave(host_set lock)
986 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
987 unsigned int (*actor
) (struct ata_scsi_args
*args
,
988 u8
*rbuf
, unsigned int buflen
))
991 unsigned int buflen
, rc
;
992 struct scsi_cmnd
*cmd
= args
->cmd
;
994 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
995 memset(rbuf
, 0, buflen
);
996 rc
= actor(args
, rbuf
, buflen
);
997 ata_scsi_rbuf_put(cmd
, rbuf
);
1000 ata_bad_cdb(cmd
, args
->done
);
1002 cmd
->result
= SAM_STAT_GOOD
;
1008 * ata_scsiop_inq_std - Simulate INQUIRY command
1009 * @args: device IDENTIFY data / SCSI command of interest.
1010 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1011 * @buflen: Response buffer length.
1013 * Returns standard device identification data associated
1014 * with non-EVPD INQUIRY command output.
1017 * spin_lock_irqsave(host_set lock)
1020 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1021 unsigned int buflen
)
1026 0x5, /* claim SPC-3 version compatibility */
1031 /* set scsi removeable (RMB) bit per ata bit */
1032 if (ata_id_removeable(args
->id
))
1037 memcpy(rbuf
, hdr
, sizeof(hdr
));
1040 memcpy(&rbuf
[8], "ATA ", 8);
1041 ata_dev_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1042 ata_dev_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1043 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1044 memcpy(&rbuf
[32], "n/a ", 4);
1048 const u8 versions
[] = {
1049 0x60, /* SAM-3 (no version claimed) */
1052 0x20, /* SBC-2 (no version claimed) */
1055 0x60 /* SPC-3 (no version claimed) */
1058 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1065 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1066 * @args: device IDENTIFY data / SCSI command of interest.
1067 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1068 * @buflen: Response buffer length.
1070 * Returns list of inquiry EVPD pages available.
1073 * spin_lock_irqsave(host_set lock)
1076 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1077 unsigned int buflen
)
1079 const u8 pages
[] = {
1080 0x00, /* page 0x00, this page */
1081 0x80, /* page 0x80, unit serial no page */
1082 0x83 /* page 0x83, device ident page */
1084 rbuf
[3] = sizeof(pages
); /* number of supported EVPD pages */
1087 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1093 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1094 * @args: device IDENTIFY data / SCSI command of interest.
1095 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1096 * @buflen: Response buffer length.
1098 * Returns ATA device serial number.
1101 * spin_lock_irqsave(host_set lock)
1104 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1105 unsigned int buflen
)
1109 0x80, /* this page code */
1111 ATA_SERNO_LEN
, /* page len */
1113 memcpy(rbuf
, hdr
, sizeof(hdr
));
1115 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1116 ata_dev_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1117 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1122 static const char *inq_83_str
= "Linux ATA-SCSI simulator";
1125 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1126 * @args: device IDENTIFY data / SCSI command of interest.
1127 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1128 * @buflen: Response buffer length.
1130 * Returns device identification. Currently hardcoded to
1131 * return "Linux ATA-SCSI simulator".
1134 * spin_lock_irqsave(host_set lock)
1137 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1138 unsigned int buflen
)
1140 rbuf
[1] = 0x83; /* this page code */
1141 rbuf
[3] = 4 + strlen(inq_83_str
); /* page len */
1143 /* our one and only identification descriptor (vendor-specific) */
1144 if (buflen
> (strlen(inq_83_str
) + 4 + 4 - 1)) {
1145 rbuf
[4 + 0] = 2; /* code set: ASCII */
1146 rbuf
[4 + 3] = strlen(inq_83_str
);
1147 memcpy(rbuf
+ 4 + 4, inq_83_str
, strlen(inq_83_str
));
1154 * ata_scsiop_noop - Command handler that simply returns success.
1155 * @args: device IDENTIFY data / SCSI command of interest.
1156 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1157 * @buflen: Response buffer length.
1159 * No operation. Simply returns success to caller, to indicate
1160 * that the caller should successfully complete this SCSI command.
1163 * spin_lock_irqsave(host_set lock)
1166 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1167 unsigned int buflen
)
1174 * ata_msense_push - Push data onto MODE SENSE data output buffer
1175 * @ptr_io: (input/output) Location to store more output data
1176 * @last: End of output data buffer
1177 * @buf: Pointer to BLOB being added to output buffer
1178 * @buflen: Length of BLOB
1180 * Store MODE SENSE data on an output buffer.
1186 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1187 const u8
*buf
, unsigned int buflen
)
1191 if ((ptr
+ buflen
- 1) > last
)
1194 memcpy(ptr
, buf
, buflen
);
1202 * ata_msense_caching - Simulate MODE SENSE caching info page
1203 * @id: device IDENTIFY data
1204 * @ptr_io: (input/output) Location to store more output data
1205 * @last: End of output data buffer
1207 * Generate a caching info page, which conditionally indicates
1208 * write caching to the SCSI layer, depending on device
1215 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1219 0x8, /* page code */
1220 0x12, /* page length */
1221 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */
1222 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */
1225 if (ata_id_wcache_enabled(id
))
1226 page
[2] |= (1 << 2); /* write cache enable */
1227 if (!ata_id_rahead_enabled(id
))
1228 page
[12] |= (1 << 5); /* disable read ahead */
1230 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1231 return sizeof(page
);
1235 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1236 * @dev: Device associated with this MODE SENSE command
1237 * @ptr_io: (input/output) Location to store more output data
1238 * @last: End of output data buffer
1240 * Generate a generic MODE SENSE control mode page.
1246 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1248 const u8 page
[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30};
1250 /* byte 2: set the descriptor format sense data bit (bit 2)
1251 * since we need to support returning this format for SAT
1252 * commands and any SCSI commands against a 48b LBA device.
1255 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1256 return sizeof(page
);
1260 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1261 * @dev: Device associated with this MODE SENSE command
1262 * @ptr_io: (input/output) Location to store more output data
1263 * @last: End of output data buffer
1265 * Generate a generic MODE SENSE r/w error recovery page.
1271 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1274 0x1, /* page code */
1275 0xa, /* page length */
1276 (1 << 7) | (1 << 6), /* note auto r/w reallocation */
1277 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */
1280 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1281 return sizeof(page
);
1285 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1286 * @args: device IDENTIFY data / SCSI command of interest.
1287 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1288 * @buflen: Response buffer length.
1290 * Simulate MODE SENSE commands.
1293 * spin_lock_irqsave(host_set lock)
1296 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1297 unsigned int buflen
)
1299 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1300 unsigned int page_control
, six_byte
, output_len
;
1304 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1306 /* we only support saved and current values (which we treat
1307 * in the same manner)
1309 page_control
= scsicmd
[2] >> 6;
1310 if ((page_control
!= 0) && (page_control
!= 3))
1318 p
= rbuf
+ output_len
;
1319 last
= rbuf
+ buflen
- 1;
1321 switch(scsicmd
[2] & 0x3f) {
1322 case 0x01: /* r/w error recovery */
1323 output_len
+= ata_msense_rw_recovery(&p
, last
);
1326 case 0x08: /* caching */
1327 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1330 case 0x0a: { /* control mode */
1331 output_len
+= ata_msense_ctl_mode(&p
, last
);
1335 case 0x3f: /* all pages */
1336 output_len
+= ata_msense_rw_recovery(&p
, last
);
1337 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1338 output_len
+= ata_msense_ctl_mode(&p
, last
);
1341 default: /* invalid page code */
1347 rbuf
[0] = output_len
;
1350 rbuf
[0] = output_len
>> 8;
1351 rbuf
[1] = output_len
;
1358 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1359 * @args: device IDENTIFY data / SCSI command of interest.
1360 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1361 * @buflen: Response buffer length.
1363 * Simulate READ CAPACITY commands.
1366 * spin_lock_irqsave(host_set lock)
1369 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1370 unsigned int buflen
)
1377 if (ata_id_has_lba(args
->id
)) {
1378 if (ata_id_has_lba48(args
->id
))
1379 n_sectors
= ata_id_u64(args
->id
, 100);
1381 n_sectors
= ata_id_u32(args
->id
, 60);
1383 /* CHS default translation */
1384 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1386 if (ata_id_current_chs_valid(args
->id
))
1387 /* CHS current translation */
1388 n_sectors
= ata_id_u32(args
->id
, 57);
1391 n_sectors
--; /* ATA TotalUserSectors - 1 */
1393 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1394 if( n_sectors
>= 0xffffffffULL
)
1395 tmp
= 0xffffffff ; /* Return max count on overflow */
1399 /* sector count, 32-bit */
1400 rbuf
[0] = tmp
>> (8 * 3);
1401 rbuf
[1] = tmp
>> (8 * 2);
1402 rbuf
[2] = tmp
>> (8 * 1);
1406 tmp
= ATA_SECT_SIZE
;
1411 /* sector count, 64-bit */
1412 tmp
= n_sectors
>> (8 * 4);
1413 rbuf
[2] = tmp
>> (8 * 3);
1414 rbuf
[3] = tmp
>> (8 * 2);
1415 rbuf
[4] = tmp
>> (8 * 1);
1418 rbuf
[6] = tmp
>> (8 * 3);
1419 rbuf
[7] = tmp
>> (8 * 2);
1420 rbuf
[8] = tmp
>> (8 * 1);
1424 tmp
= ATA_SECT_SIZE
;
1425 rbuf
[12] = tmp
>> 8;
1433 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1434 * @args: device IDENTIFY data / SCSI command of interest.
1435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1436 * @buflen: Response buffer length.
1438 * Simulate REPORT LUNS command.
1441 * spin_lock_irqsave(host_set lock)
1444 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1445 unsigned int buflen
)
1448 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1454 * ata_scsi_badcmd - End a SCSI request with an error
1455 * @cmd: SCSI request to be handled
1456 * @done: SCSI command completion function
1457 * @asc: SCSI-defined additional sense code
1458 * @ascq: SCSI-defined additional sense code qualifier
1460 * Helper function that completes a SCSI command with
1461 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1462 * and the specified additional sense codes.
1465 * spin_lock_irqsave(host_set lock)
1468 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
1471 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1473 cmd
->sense_buffer
[0] = 0x70;
1474 cmd
->sense_buffer
[2] = ILLEGAL_REQUEST
;
1475 cmd
->sense_buffer
[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */
1476 cmd
->sense_buffer
[12] = asc
;
1477 cmd
->sense_buffer
[13] = ascq
;
1482 void atapi_request_sense(struct ata_port
*ap
, struct ata_device
*dev
,
1483 struct scsi_cmnd
*cmd
)
1485 DECLARE_COMPLETION(wait
);
1486 struct ata_queued_cmd
*qc
;
1487 unsigned long flags
;
1490 DPRINTK("ATAPI request sense\n");
1492 qc
= ata_qc_new_init(ap
, dev
);
1495 /* FIXME: is this needed? */
1496 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
1498 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
1499 qc
->dma_dir
= DMA_FROM_DEVICE
;
1501 memset(&qc
->cdb
, 0, ap
->cdb_len
);
1502 qc
->cdb
[0] = REQUEST_SENSE
;
1503 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
1505 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1506 qc
->tf
.command
= ATA_CMD_PACKET
;
1508 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
1509 qc
->tf
.lbam
= (8 * 1024) & 0xff;
1510 qc
->tf
.lbah
= (8 * 1024) >> 8;
1511 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
1513 qc
->waiting
= &wait
;
1514 qc
->complete_fn
= ata_qc_complete_noop
;
1516 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1517 rc
= ata_qc_issue(qc
);
1518 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1521 ata_port_disable(ap
);
1523 wait_for_completion(&wait
);
1528 static int atapi_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
1530 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1532 if (unlikely(drv_stat
& (ATA_BUSY
| ATA_DRQ
)))
1533 ata_to_sense_error(qc
, drv_stat
);
1534 else if (unlikely(drv_stat
& ATA_ERR
)) {
1535 DPRINTK("request check condition\n");
1537 /* FIXME: command completion with check condition
1538 * but no sense causes the error handler to run,
1539 * which then issues REQUEST SENSE, fills in the sense
1540 * buffer, and completes the command (for the second
1541 * time). We need to issue REQUEST SENSE some other
1542 * way, to avoid completing the command twice.
1544 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
1550 u8
*scsicmd
= cmd
->cmnd
;
1552 if (scsicmd
[0] == INQUIRY
) {
1554 unsigned int buflen
;
1556 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
1558 /* ATAPI devices typically report zero for their SCSI version,
1559 * and sometimes deviate from the spec WRT response data
1560 * format. If SCSI version is reported as zero like normal,
1561 * then we make the following fixups: 1) Fake MMC-5 version,
1562 * to indicate to the Linux scsi midlayer this is a modern
1563 * device. 2) Ensure response data format / ATAPI information
1564 * are always correct.
1566 /* FIXME: do we ever override EVPD pages and the like, with
1574 ata_scsi_rbuf_put(cmd
, buf
);
1577 cmd
->result
= SAM_STAT_GOOD
;
1585 * atapi_xlat - Initialize PACKET taskfile
1586 * @qc: command structure to be initialized
1587 * @scsicmd: SCSI CDB associated with this PACKET command
1590 * spin_lock_irqsave(host_set lock)
1593 * Zero on success, non-zero on failure.
1596 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, u8
*scsicmd
)
1598 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1599 struct ata_device
*dev
= qc
->dev
;
1600 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
1601 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
1604 /* Check whether ATAPI DMA is safe */
1605 if (ata_check_atapi_dma(qc
))
1608 memcpy(&qc
->cdb
, scsicmd
, qc
->ap
->cdb_len
);
1610 qc
->complete_fn
= atapi_qc_complete
;
1612 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1613 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1614 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
1615 DPRINTK("direction: write\n");
1618 qc
->tf
.command
= ATA_CMD_PACKET
;
1620 /* no data, or PIO data xfer */
1621 if (using_pio
|| nodata
) {
1623 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
1625 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
1626 qc
->tf
.lbam
= (8 * 1024) & 0xff;
1627 qc
->tf
.lbah
= (8 * 1024) >> 8;
1632 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
1633 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
1635 #ifdef ATAPI_ENABLE_DMADIR
1636 /* some SATA bridges need us to indicate data xfer direction */
1637 if (cmd
->sc_data_direction
!= DMA_TO_DEVICE
)
1638 qc
->tf
.feature
|= ATAPI_DMADIR
;
1642 qc
->nbytes
= cmd
->bufflen
;
1648 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
1649 * @ap: ATA port to which the device is attached
1650 * @scsidev: SCSI device from which we derive the ATA device
1652 * Given various information provided in struct scsi_cmnd,
1653 * map that onto an ATA bus, and using that mapping
1654 * determine which ata_device is associated with the
1655 * SCSI command to be sent.
1658 * spin_lock_irqsave(host_set lock)
1661 * Associated ATA device, or %NULL if not found.
1664 static struct ata_device
*
1665 ata_scsi_find_dev(struct ata_port
*ap
, struct scsi_device
*scsidev
)
1667 struct ata_device
*dev
;
1669 /* skip commands not addressed to targets we simulate */
1670 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
1671 dev
= &ap
->device
[scsidev
->id
];
1675 if (unlikely((scsidev
->channel
!= 0) ||
1676 (scsidev
->lun
!= 0)))
1679 if (unlikely(!ata_dev_present(dev
)))
1682 if (!atapi_enabled
) {
1683 if (unlikely(dev
->class == ATA_DEV_ATAPI
))
1691 * ata_get_xlat_func - check if SCSI to ATA translation is possible
1693 * @cmd: SCSI command opcode to consider
1695 * Look up the SCSI command given, and determine whether the
1696 * SCSI command is to be translated or simulated.
1699 * Pointer to translation function if possible, %NULL if not.
1702 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
1712 return ata_scsi_rw_xlat
;
1714 case SYNCHRONIZE_CACHE
:
1715 if (ata_try_flush_cache(dev
))
1716 return ata_scsi_flush_xlat
;
1721 return ata_scsi_verify_xlat
;
1723 return ata_scsi_start_stop_xlat
;
1730 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
1731 * @ap: ATA port to which the command was being sent
1732 * @cmd: SCSI command to dump
1734 * Prints the contents of a SCSI command via printk().
1737 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
1738 struct scsi_cmnd
*cmd
)
1741 struct scsi_device
*scsidev
= cmd
->device
;
1742 u8
*scsicmd
= cmd
->cmnd
;
1744 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1746 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
1747 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
1748 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
1754 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
1755 * @cmd: SCSI command to be sent
1756 * @done: Completion function, called when command is complete
1758 * In some cases, this function translates SCSI commands into
1759 * ATA taskfiles, and queues the taskfiles to be sent to
1760 * hardware. In other cases, this function simulates a
1761 * SCSI device by evaluating and responding to certain
1762 * SCSI commands. This creates the overall effect of
1763 * ATA and ATAPI devices appearing as SCSI devices.
1766 * Releases scsi-layer-held lock, and obtains host_set lock.
1772 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
1774 struct ata_port
*ap
;
1775 struct ata_device
*dev
;
1776 struct scsi_device
*scsidev
= cmd
->device
;
1778 ap
= (struct ata_port
*) &scsidev
->host
->hostdata
[0];
1780 ata_scsi_dump_cdb(ap
, cmd
);
1782 dev
= ata_scsi_find_dev(ap
, scsidev
);
1783 if (unlikely(!dev
)) {
1784 cmd
->result
= (DID_BAD_TARGET
<< 16);
1789 if (dev
->class == ATA_DEV_ATA
) {
1790 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
1794 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
1796 ata_scsi_simulate(dev
->id
, cmd
, done
);
1798 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
1805 * ata_scsi_simulate - simulate SCSI command on ATA device
1806 * @id: current IDENTIFY data for target device.
1807 * @cmd: SCSI command being sent to device.
1808 * @done: SCSI command completion function.
1810 * Interprets and directly executes a select list of SCSI commands
1811 * that can be handled internally.
1814 * spin_lock_irqsave(host_set lock)
1817 void ata_scsi_simulate(u16
*id
,
1818 struct scsi_cmnd
*cmd
,
1819 void (*done
)(struct scsi_cmnd
*))
1821 struct ata_scsi_args args
;
1822 u8
*scsicmd
= cmd
->cmnd
;
1828 switch(scsicmd
[0]) {
1829 /* no-op's, complete with success */
1830 case SYNCHRONIZE_CACHE
:
1834 case TEST_UNIT_READY
:
1835 case FORMAT_UNIT
: /* FIXME: correct? */
1836 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
1837 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
1841 if (scsicmd
[1] & 2) /* is CmdDt set? */
1842 ata_bad_cdb(cmd
, done
);
1843 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
1844 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
1845 else if (scsicmd
[2] == 0x00)
1846 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
1847 else if (scsicmd
[2] == 0x80)
1848 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
1849 else if (scsicmd
[2] == 0x83)
1850 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
1852 ata_bad_cdb(cmd
, done
);
1857 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
1860 case MODE_SELECT
: /* unconditionally return */
1861 case MODE_SELECT_10
: /* bad-field-in-cdb */
1862 ata_bad_cdb(cmd
, done
);
1866 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
1869 case SERVICE_ACTION_IN
:
1870 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
1871 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
1873 ata_bad_cdb(cmd
, done
);
1877 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
1880 /* mandantory commands we haven't implemented yet */
1883 /* all other commands */
1885 ata_bad_scsiop(cmd
, done
);
1890 void ata_scsi_scan_host(struct ata_port
*ap
)
1892 struct ata_device
*dev
;
1895 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1898 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1899 dev
= &ap
->device
[i
];
1901 if (ata_dev_present(dev
))
1902 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);