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_eh.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_request.h>
44 #include <linux/libata.h>
45 #include <linux/hdreg.h>
46 #include <asm/uaccess.h>
50 #define SECTOR_SIZE 512
52 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
, const u8
*scsicmd
);
53 static struct ata_device
*
54 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
);
56 #define RW_RECOVERY_MPAGE 0x1
57 #define RW_RECOVERY_MPAGE_LEN 12
58 #define CACHE_MPAGE 0x8
59 #define CACHE_MPAGE_LEN 20
60 #define CONTROL_MPAGE 0xa
61 #define CONTROL_MPAGE_LEN 12
62 #define ALL_MPAGES 0x3f
63 #define ALL_SUB_MPAGES 0xff
66 static const u8 def_rw_recovery_mpage
[] = {
68 RW_RECOVERY_MPAGE_LEN
- 2,
69 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
70 (1 << 6), /* ARRE (auto read reallocation) */
71 0, /* read retry count */
73 0, /* write retry count */
77 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
80 0, /* contains WCE, needs to be 0 for logic */
81 0, 0, 0, 0, 0, 0, 0, 0, 0,
82 0, /* contains DRA, needs to be 0 for logic */
86 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
88 CONTROL_MPAGE_LEN
- 2,
89 2, /* DSENSE=0, GLTSD=1 */
90 0, /* [QAM+QERR may be 1, see 05-359r1] */
91 0, 0, 0, 0, 0xff, 0xff,
92 0, 30 /* extended self test time, see 05-359r1 */
96 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
97 void (*done
)(struct scsi_cmnd
*))
99 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
100 /* "Invalid field in cbd" */
105 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
106 * @sdev: SCSI device for which BIOS geometry is to be determined
107 * @bdev: block device associated with @sdev
108 * @capacity: capacity of SCSI device
109 * @geom: location to which geometry will be output
111 * Generic bios head/sector/cylinder calculator
112 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
113 * mapping. Some situations may arise where the disk is not
114 * bootable if this is not used.
117 * Defined by the SCSI layer. We don't really care.
122 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
123 sector_t capacity
, int geom
[])
127 sector_div(capacity
, 255*63);
134 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
135 * @scsidev: Device to which we are issuing command
136 * @arg: User provided data for issuing command
139 * Defined by the SCSI layer. We don't really care.
142 * Zero on success, negative errno on error.
145 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
148 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
149 u8 args
[4], *argbuf
= NULL
;
151 struct scsi_sense_hdr sshdr
;
152 enum dma_data_direction data_dir
;
154 if (NULL
== (void *)arg
)
157 if (copy_from_user(args
, arg
, sizeof(args
)))
160 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
163 argsize
= SECTOR_SIZE
* args
[3];
164 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
165 if (argbuf
== NULL
) {
170 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
171 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
172 block count in sector count field */
173 data_dir
= DMA_FROM_DEVICE
;
175 scsi_cmd
[1] = (3 << 1); /* Non-data */
176 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
180 scsi_cmd
[0] = ATA_16
;
182 scsi_cmd
[4] = args
[2];
183 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
184 scsi_cmd
[6] = args
[3];
185 scsi_cmd
[8] = args
[1];
189 scsi_cmd
[6] = args
[1];
191 scsi_cmd
[14] = args
[0];
193 /* Good values for timeout and retries? Values below
194 from scsi_ioctl_send_command() for default case... */
195 if (scsi_execute_req(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
196 &sshdr
, (10*HZ
), 5)) {
201 /* Need code to retrieve data from check condition? */
204 && copy_to_user((void *)(arg
+ sizeof(args
)), argbuf
, argsize
))
214 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
215 * @scsidev: Device to which we are issuing command
216 * @arg: User provided data for issuing command
219 * Defined by the SCSI layer. We don't really care.
222 * Zero on success, negative errno on error.
224 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
227 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
229 struct scsi_sense_hdr sshdr
;
231 if (NULL
== (void *)arg
)
234 if (copy_from_user(args
, arg
, sizeof(args
)))
237 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
238 scsi_cmd
[0] = ATA_16
;
239 scsi_cmd
[1] = (3 << 1); /* Non-data */
240 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
241 scsi_cmd
[4] = args
[1];
242 scsi_cmd
[6] = args
[2];
243 scsi_cmd
[8] = args
[3];
244 scsi_cmd
[10] = args
[4];
245 scsi_cmd
[12] = args
[5];
246 scsi_cmd
[14] = args
[0];
248 /* Good values for timeout and retries? Values below
249 from scsi_ioctl_send_command() for default case... */
250 if (scsi_execute_req(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0, &sshdr
,
254 /* Need code to retrieve data from check condition? */
258 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
261 struct ata_device
*dev
;
262 int val
= -EINVAL
, rc
= -EINVAL
;
264 ap
= (struct ata_port
*) &scsidev
->host
->hostdata
[0];
268 dev
= ata_scsi_find_dev(ap
, scsidev
);
275 case ATA_IOC_GET_IO32
:
277 if (copy_to_user(arg
, &val
, 1))
281 case ATA_IOC_SET_IO32
:
282 val
= (unsigned long) arg
;
288 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
290 return ata_cmd_ioctl(scsidev
, arg
);
292 case HDIO_DRIVE_TASK
:
293 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
295 return ata_task_ioctl(scsidev
, arg
);
307 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
308 * @ap: ATA port to which the new command is attached
309 * @dev: ATA device to which the new command is attached
310 * @cmd: SCSI command that originated this ATA command
311 * @done: SCSI command completion function
313 * Obtain a reference to an unused ata_queued_cmd structure,
314 * which is the basic libata structure representing a single
315 * ATA command sent to the hardware.
317 * If a command was available, fill in the SCSI-specific
318 * portions of the structure with information on the
322 * spin_lock_irqsave(host_set lock)
325 * Command allocated, or %NULL if none available.
327 struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_port
*ap
,
328 struct ata_device
*dev
,
329 struct scsi_cmnd
*cmd
,
330 void (*done
)(struct scsi_cmnd
*))
332 struct ata_queued_cmd
*qc
;
334 qc
= ata_qc_new_init(ap
, dev
);
340 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
341 qc
->n_elem
= cmd
->use_sg
;
343 qc
->__sg
= &qc
->sgent
;
347 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
355 * ata_dump_status - user friendly display of error info
356 * @id: id of the port in question
357 * @tf: ptr to filled out taskfile
359 * Decode and dump the ATA error/status registers for the user so
360 * that they have some idea what really happened at the non
361 * make-believe layer.
364 * inherited from caller
366 void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
368 u8 stat
= tf
->command
, err
= tf
->feature
;
370 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
371 if (stat
& ATA_BUSY
) {
372 printk("Busy }\n"); /* Data is not valid in this case */
374 if (stat
& 0x40) printk("DriveReady ");
375 if (stat
& 0x20) printk("DeviceFault ");
376 if (stat
& 0x10) printk("SeekComplete ");
377 if (stat
& 0x08) printk("DataRequest ");
378 if (stat
& 0x04) printk("CorrectedError ");
379 if (stat
& 0x02) printk("Index ");
380 if (stat
& 0x01) printk("Error ");
384 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
385 if (err
& 0x04) printk("DriveStatusError ");
387 if (err
& 0x04) printk("BadCRC ");
388 else printk("Sector ");
390 if (err
& 0x40) printk("UncorrectableError ");
391 if (err
& 0x10) printk("SectorIdNotFound ");
392 if (err
& 0x02) printk("TrackZeroNotFound ");
393 if (err
& 0x01) printk("AddrMarkNotFound ");
400 * ata_to_sense_error - convert ATA error to SCSI error
401 * @id: ATA device number
402 * @drv_stat: value contained in ATA status register
403 * @drv_err: value contained in ATA error register
404 * @sk: the sense key we'll fill out
405 * @asc: the additional sense code we'll fill out
406 * @ascq: the additional sense code qualifier we'll fill out
408 * Converts an ATA error into a SCSI error. Fill out pointers to
409 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
410 * format sense blocks.
413 * spin_lock_irqsave(host_set lock)
415 void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
, u8
*asc
,
420 /* Based on the 3ware driver translation table */
421 static unsigned char sense_table
[][4] = {
423 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
425 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
427 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
428 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
429 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
430 /* MC|ID|ABRT|TRK0|MARK */
431 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
433 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
434 /* Bad address mark */
435 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
437 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
439 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
440 /* Media change request */
441 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
443 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
445 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
447 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
448 /* BBD - block marked bad */
449 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
450 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
452 static unsigned char stat_table
[][4] = {
453 /* Must be first because BUSY means no other bits valid */
454 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
455 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
456 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
457 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
458 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
462 * Is this an error we can process/parse
464 if (drv_stat
& ATA_BUSY
) {
465 drv_err
= 0; /* Ignore the err bits, they're invalid */
469 /* Look for drv_err */
470 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
471 /* Look for best matches first */
472 if ((sense_table
[i
][0] & drv_err
) ==
474 *sk
= sense_table
[i
][1];
475 *asc
= sense_table
[i
][2];
476 *ascq
= sense_table
[i
][3];
480 /* No immediate match */
481 printk(KERN_WARNING
"ata%u: no sense translation for "
482 "error 0x%02x\n", id
, drv_err
);
485 /* Fall back to interpreting status bits */
486 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
487 if (stat_table
[i
][0] & drv_stat
) {
488 *sk
= stat_table
[i
][1];
489 *asc
= stat_table
[i
][2];
490 *ascq
= stat_table
[i
][3];
494 /* No error? Undecoded? */
495 printk(KERN_WARNING
"ata%u: no sense translation for status: 0x%02x\n",
498 /* For our last chance pick, use medium read error because
499 * it's much more common than an ATA drive telling you a write
503 *asc
= 0x11; /* "unrecovered read error" */
504 *ascq
= 0x04; /* "auto-reallocation failed" */
507 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x to "
508 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id
, drv_stat
, drv_err
,
514 * ata_gen_ata_desc_sense - Generate check condition sense block.
515 * @qc: Command that completed.
517 * This function is specific to the ATA descriptor format sense
518 * block specified for the ATA pass through commands. Regardless
519 * of whether the command errored or not, return a sense
520 * block. Copy all controller registers into the sense
521 * block. Clear sense key, ASC & ASCQ if there is no error.
524 * spin_lock_irqsave(host_set lock)
526 void ata_gen_ata_desc_sense(struct ata_queued_cmd
*qc
)
528 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
529 struct ata_taskfile
*tf
= &qc
->tf
;
530 unsigned char *sb
= cmd
->sense_buffer
;
531 unsigned char *desc
= sb
+ 8;
533 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
535 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
538 * Read the controller registers.
540 assert(NULL
!= qc
->ap
->ops
->tf_read
);
541 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
544 * Use ata_to_sense_error() to map status register bits
545 * onto sense key, asc & ascq.
547 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
548 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
549 &sb
[1], &sb
[2], &sb
[3]);
554 * Sense data is current and format is descriptor.
561 * Set length of additional sense data.
562 * Since we only populate descriptor 0, the total
563 * length is the same (fixed) length as descriptor 0.
565 desc
[1] = sb
[7] = 14;
568 * Copy registers into sense buffer.
571 desc
[3] = tf
->feature
; /* == error reg */
576 desc
[12] = tf
->device
;
577 desc
[13] = tf
->command
; /* == status reg */
580 * Fill in Extend bit, and the high order bytes
583 if (tf
->flags
& ATA_TFLAG_LBA48
) {
585 desc
[4] = tf
->hob_nsect
;
586 desc
[6] = tf
->hob_lbal
;
587 desc
[8] = tf
->hob_lbam
;
588 desc
[10] = tf
->hob_lbah
;
593 * ata_gen_fixed_sense - generate a SCSI fixed sense block
594 * @qc: Command that we are erroring out
596 * Leverage ata_to_sense_error() to give us the codes. Fit our
597 * LBA in here if there's room.
600 * inherited from caller
602 void ata_gen_fixed_sense(struct ata_queued_cmd
*qc
)
604 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
605 struct ata_taskfile
*tf
= &qc
->tf
;
606 unsigned char *sb
= cmd
->sense_buffer
;
608 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
610 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
613 * Read the controller registers.
615 assert(NULL
!= qc
->ap
->ops
->tf_read
);
616 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
619 * Use ata_to_sense_error() to map status register bits
620 * onto sense key, asc & ascq.
622 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
623 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
624 &sb
[2], &sb
[12], &sb
[13]);
631 if (tf
->flags
& ATA_TFLAG_LBA48
) {
632 /* TODO: find solution for LBA48 descriptors */
635 else if (tf
->flags
& ATA_TFLAG_LBA
) {
636 /* A small (28b) LBA will fit in the 32b info field */
637 sb
[0] |= 0x80; /* set valid bit */
638 sb
[3] = tf
->device
& 0x0f;
650 * ata_scsi_slave_config - Set SCSI device attributes
651 * @sdev: SCSI device to examine
653 * This is called before we actually start reading
654 * and writing to the device, to configure certain
655 * SCSI mid-layer behaviors.
658 * Defined by SCSI layer. We don't really care.
661 int ata_scsi_slave_config(struct scsi_device
*sdev
)
663 sdev
->use_10_for_rw
= 1;
664 sdev
->use_10_for_ms
= 1;
666 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
668 if (sdev
->id
< ATA_MAX_DEVICES
) {
670 struct ata_device
*dev
;
672 ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
673 dev
= &ap
->device
[sdev
->id
];
675 /* TODO: 1024 is an arbitrary number, not the
676 * hardware maximum. This should be increased to
677 * 65534 when Jens Axboe's patch for dynamically
678 * determining max_sectors is merged.
680 if ((dev
->flags
& ATA_DFLAG_LBA48
) &&
681 ((dev
->flags
& ATA_DFLAG_LOCK_SECTORS
) == 0)) {
683 * do not overwrite sdev->host->max_sectors, since
684 * other drives on this host may not support LBA48
686 blk_queue_max_sectors(sdev
->request_queue
, 2048);
690 * SATA DMA transfers must be multiples of 4 byte, so
691 * we need to pad ATAPI transfers using an extra sg.
692 * Decrement max hw segments accordingly.
694 if (dev
->class == ATA_DEV_ATAPI
) {
695 request_queue_t
*q
= sdev
->request_queue
;
696 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
700 return 0; /* scsi layer doesn't check return value, sigh */
704 * ata_scsi_error - SCSI layer error handler callback
705 * @host: SCSI host on which error occurred
707 * Handles SCSI-layer-thrown error events.
710 * Inherited from SCSI layer (none, can sleep)
716 int ata_scsi_error(struct Scsi_Host
*host
)
722 ap
= (struct ata_port
*) &host
->hostdata
[0];
723 ap
->ops
->eng_timeout(ap
);
725 /* TODO: this is per-command; when queueing is supported
726 * this code will either change or move to a more
730 INIT_LIST_HEAD(&host
->eh_cmd_q
);
737 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
738 * @qc: Storage for translated ATA taskfile
739 * @scsicmd: SCSI command to translate
741 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
742 * (to start). Perhaps these commands should be preceded by
743 * CHECK POWER MODE to see what power mode the device is already in.
744 * [See SAT revision 5 at www.t10.org]
747 * spin_lock_irqsave(host_set lock)
750 * Zero on success, non-zero on error.
753 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
756 struct ata_taskfile
*tf
= &qc
->tf
;
758 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
759 tf
->protocol
= ATA_PROT_NODATA
;
760 if (scsicmd
[1] & 0x1) {
761 ; /* ignore IMMED bit, violates sat-r05 */
763 if (scsicmd
[4] & 0x2)
764 goto invalid_fld
; /* LOEJ bit set not supported */
765 if (((scsicmd
[4] >> 4) & 0xf) != 0)
766 goto invalid_fld
; /* power conditions not supported */
767 if (scsicmd
[4] & 0x1) {
768 tf
->nsect
= 1; /* 1 sector, lba=0 */
770 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
771 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
776 tf
->device
|= ATA_LBA
;
779 tf
->lbal
= 0x1; /* sect */
780 tf
->lbam
= 0x0; /* cyl low */
781 tf
->lbah
= 0x0; /* cyl high */
784 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
786 tf
->nsect
= 0; /* time period value (0 implies now) */
787 tf
->command
= ATA_CMD_STANDBY
;
788 /* Consider: ATA STANDBY IMMEDIATE command */
791 * Standby and Idle condition timers could be implemented but that
792 * would require libata to implement the Power condition mode page
793 * and allow the user to change it. Changing mode pages requires
794 * MODE SELECT to be implemented.
800 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
801 /* "Invalid field in cbd" */
807 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
808 * @qc: Storage for translated ATA taskfile
809 * @scsicmd: SCSI command to translate (ignored)
811 * Sets up an ATA taskfile to issue FLUSH CACHE or
815 * spin_lock_irqsave(host_set lock)
818 * Zero on success, non-zero on error.
821 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
823 struct ata_taskfile
*tf
= &qc
->tf
;
825 tf
->flags
|= ATA_TFLAG_DEVICE
;
826 tf
->protocol
= ATA_PROT_NODATA
;
828 if ((qc
->dev
->flags
& ATA_DFLAG_LBA48
) &&
829 (ata_id_has_flush_ext(qc
->dev
->id
)))
830 tf
->command
= ATA_CMD_FLUSH_EXT
;
832 tf
->command
= ATA_CMD_FLUSH
;
838 * scsi_6_lba_len - Get LBA and transfer length
839 * @scsicmd: SCSI command to translate
841 * Calculate LBA and transfer length for 6-byte commands.
845 * @plen: the transfer length
848 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
853 VPRINTK("six-byte command\n");
855 lba
|= ((u64
)scsicmd
[2]) << 8;
856 lba
|= ((u64
)scsicmd
[3]);
858 len
|= ((u32
)scsicmd
[4]);
865 * scsi_10_lba_len - Get LBA and transfer length
866 * @scsicmd: SCSI command to translate
868 * Calculate LBA and transfer length for 10-byte commands.
872 * @plen: the transfer length
875 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
880 VPRINTK("ten-byte command\n");
882 lba
|= ((u64
)scsicmd
[2]) << 24;
883 lba
|= ((u64
)scsicmd
[3]) << 16;
884 lba
|= ((u64
)scsicmd
[4]) << 8;
885 lba
|= ((u64
)scsicmd
[5]);
887 len
|= ((u32
)scsicmd
[7]) << 8;
888 len
|= ((u32
)scsicmd
[8]);
895 * scsi_16_lba_len - Get LBA and transfer length
896 * @scsicmd: SCSI command to translate
898 * Calculate LBA and transfer length for 16-byte commands.
902 * @plen: the transfer length
905 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
910 VPRINTK("sixteen-byte command\n");
912 lba
|= ((u64
)scsicmd
[2]) << 56;
913 lba
|= ((u64
)scsicmd
[3]) << 48;
914 lba
|= ((u64
)scsicmd
[4]) << 40;
915 lba
|= ((u64
)scsicmd
[5]) << 32;
916 lba
|= ((u64
)scsicmd
[6]) << 24;
917 lba
|= ((u64
)scsicmd
[7]) << 16;
918 lba
|= ((u64
)scsicmd
[8]) << 8;
919 lba
|= ((u64
)scsicmd
[9]);
921 len
|= ((u32
)scsicmd
[10]) << 24;
922 len
|= ((u32
)scsicmd
[11]) << 16;
923 len
|= ((u32
)scsicmd
[12]) << 8;
924 len
|= ((u32
)scsicmd
[13]);
931 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
932 * @qc: Storage for translated ATA taskfile
933 * @scsicmd: SCSI command to translate
935 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
938 * spin_lock_irqsave(host_set lock)
941 * Zero on success, non-zero on error.
944 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
946 struct ata_taskfile
*tf
= &qc
->tf
;
947 struct ata_device
*dev
= qc
->dev
;
948 u64 dev_sectors
= qc
->dev
->n_sectors
;
952 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
953 tf
->protocol
= ATA_PROT_NODATA
;
955 if (scsicmd
[0] == VERIFY
)
956 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
957 else if (scsicmd
[0] == VERIFY_16
)
958 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
964 if (block
>= dev_sectors
)
966 if ((block
+ n_block
) > dev_sectors
)
969 if (dev
->flags
& ATA_DFLAG_LBA
) {
970 tf
->flags
|= ATA_TFLAG_LBA
;
972 if (dev
->flags
& ATA_DFLAG_LBA48
) {
973 if (n_block
> (64 * 1024))
977 tf
->flags
|= ATA_TFLAG_LBA48
;
978 tf
->command
= ATA_CMD_VERIFY_EXT
;
980 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
982 tf
->hob_lbah
= (block
>> 40) & 0xff;
983 tf
->hob_lbam
= (block
>> 32) & 0xff;
984 tf
->hob_lbal
= (block
>> 24) & 0xff;
990 tf
->command
= ATA_CMD_VERIFY
;
992 tf
->device
|= (block
>> 24) & 0xf;
995 tf
->nsect
= n_block
& 0xff;
997 tf
->lbah
= (block
>> 16) & 0xff;
998 tf
->lbam
= (block
>> 8) & 0xff;
999 tf
->lbal
= block
& 0xff;
1001 tf
->device
|= ATA_LBA
;
1004 u32 sect
, head
, cyl
, track
;
1009 /* Convert LBA to CHS */
1010 track
= (u32
)block
/ dev
->sectors
;
1011 cyl
= track
/ dev
->heads
;
1012 head
= track
% dev
->heads
;
1013 sect
= (u32
)block
% dev
->sectors
+ 1;
1015 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1016 (u32
)block
, track
, cyl
, head
, sect
);
1018 /* Check whether the converted CHS can fit.
1022 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1025 tf
->command
= ATA_CMD_VERIFY
;
1026 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1029 tf
->lbah
= cyl
>> 8;
1036 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1037 /* "Invalid field in cbd" */
1041 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1042 /* "Logical Block Address out of range" */
1046 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1051 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1052 * @qc: Storage for translated ATA taskfile
1053 * @scsicmd: SCSI command to translate
1055 * Converts any of six SCSI read/write commands into the
1056 * ATA counterpart, including starting sector (LBA),
1057 * sector count, and taking into account the device's LBA48
1060 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1061 * %WRITE_16 are currently supported.
1064 * spin_lock_irqsave(host_set lock)
1067 * Zero on success, non-zero on error.
1070 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1072 struct ata_taskfile
*tf
= &qc
->tf
;
1073 struct ata_device
*dev
= qc
->dev
;
1077 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1079 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1080 scsicmd
[0] == WRITE_16
)
1081 tf
->flags
|= ATA_TFLAG_WRITE
;
1083 /* Calculate the SCSI LBA and transfer length. */
1084 switch (scsicmd
[0]) {
1087 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1091 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1093 /* for 6-byte r/w commands, transfer length 0
1094 * means 256 blocks of data, not 0 block.
1101 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1104 DPRINTK("no-byte command\n");
1108 /* Check and compose ATA command */
1110 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1111 * length 0 means transfer 0 block of data.
1112 * However, for ATA R/W commands, sector count 0 means
1113 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1115 * WARNING: one or two older ATA drives treat 0 as 0...
1119 if (dev
->flags
& ATA_DFLAG_LBA
) {
1120 tf
->flags
|= ATA_TFLAG_LBA
;
1122 if (dev
->flags
& ATA_DFLAG_LBA48
) {
1123 /* The request -may- be too large for LBA48. */
1124 if ((block
>> 48) || (n_block
> 65536))
1128 tf
->flags
|= ATA_TFLAG_LBA48
;
1130 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1132 tf
->hob_lbah
= (block
>> 40) & 0xff;
1133 tf
->hob_lbam
= (block
>> 32) & 0xff;
1134 tf
->hob_lbal
= (block
>> 24) & 0xff;
1138 /* The request -may- be too large for LBA28. */
1139 if ((block
>> 28) || (n_block
> 256))
1142 tf
->device
|= (block
>> 24) & 0xf;
1145 ata_rwcmd_protocol(qc
);
1147 qc
->nsect
= n_block
;
1148 tf
->nsect
= n_block
& 0xff;
1150 tf
->lbah
= (block
>> 16) & 0xff;
1151 tf
->lbam
= (block
>> 8) & 0xff;
1152 tf
->lbal
= block
& 0xff;
1154 tf
->device
|= ATA_LBA
;
1157 u32 sect
, head
, cyl
, track
;
1159 /* The request -may- be too large for CHS addressing. */
1160 if ((block
>> 28) || (n_block
> 256))
1163 ata_rwcmd_protocol(qc
);
1165 /* Convert LBA to CHS */
1166 track
= (u32
)block
/ dev
->sectors
;
1167 cyl
= track
/ dev
->heads
;
1168 head
= track
% dev
->heads
;
1169 sect
= (u32
)block
% dev
->sectors
+ 1;
1171 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1172 (u32
)block
, track
, cyl
, head
, sect
);
1174 /* Check whether the converted CHS can fit.
1178 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1181 qc
->nsect
= n_block
;
1182 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1185 tf
->lbah
= cyl
>> 8;
1192 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1193 /* "Invalid field in cbd" */
1197 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1198 /* "Logical Block Address out of range" */
1202 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1206 static int ata_scsi_qc_complete(struct ata_queued_cmd
*qc
,
1207 unsigned int err_mask
)
1209 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1210 u8
*cdb
= cmd
->cmnd
;
1211 int need_sense
= (err_mask
!= 0);
1213 /* For ATA pass thru (SAT) commands, generate a sense block if
1214 * user mandated it or if there's an error. Note that if we
1215 * generate because the user forced us to, a check condition
1216 * is generated and the ATA register values are returned
1217 * whether the command completed successfully or not. If there
1218 * was no error, SK, ASC and ASCQ will all be zero.
1220 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1221 ((cdb
[2] & 0x20) || need_sense
)) {
1222 ata_gen_ata_desc_sense(qc
);
1225 cmd
->result
= SAM_STAT_GOOD
;
1227 /* TODO: decide which descriptor format to use
1228 * for 48b LBA devices and call that here
1229 * instead of the fixed desc, which is only
1230 * good for smaller LBA (and maybe CHS?)
1233 ata_gen_fixed_sense(qc
);
1238 /* The ata_gen_..._sense routines fill in tf */
1239 ata_dump_status(qc
->ap
->id
, &qc
->tf
);
1248 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1249 * @ap: ATA port to which the command is addressed
1250 * @dev: ATA device to which the command is addressed
1251 * @cmd: SCSI command to execute
1252 * @done: SCSI command completion function
1253 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1255 * Our ->queuecommand() function has decided that the SCSI
1256 * command issued can be directly translated into an ATA
1257 * command, rather than handled internally.
1259 * This function sets up an ata_queued_cmd structure for the
1260 * SCSI command, and sends that ata_queued_cmd to the hardware.
1262 * The xlat_func argument (actor) returns 0 if ready to execute
1263 * ATA command, else 1 to finish translation. If 1 is returned
1264 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1265 * to be set reflecting an error condition or clean (early)
1269 * spin_lock_irqsave(host_set lock)
1272 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
1273 struct scsi_cmnd
*cmd
,
1274 void (*done
)(struct scsi_cmnd
*),
1275 ata_xlat_func_t xlat_func
)
1277 struct ata_queued_cmd
*qc
;
1278 u8
*scsicmd
= cmd
->cmnd
;
1282 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
1286 /* data is present; dma-map it */
1287 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1288 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1289 if (unlikely(cmd
->request_bufflen
< 1)) {
1290 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
1291 ap
->id
, dev
->devno
);
1296 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1298 ata_sg_init_one(qc
, cmd
->request_buffer
,
1299 cmd
->request_bufflen
);
1301 qc
->dma_dir
= cmd
->sc_data_direction
;
1304 qc
->complete_fn
= ata_scsi_qc_complete
;
1306 if (xlat_func(qc
, scsicmd
))
1309 /* select device, send command to hardware */
1310 if (ata_qc_issue(qc
))
1319 DPRINTK("EXIT - early finish (good or error)\n");
1325 cmd
->result
= (DID_ERROR
<< 16);
1327 DPRINTK("EXIT - internal\n");
1332 * ata_scsi_rbuf_get - Map response buffer.
1333 * @cmd: SCSI command containing buffer to be mapped.
1334 * @buf_out: Pointer to mapped area.
1336 * Maps buffer contained within SCSI command @cmd.
1339 * spin_lock_irqsave(host_set lock)
1342 * Length of response buffer.
1345 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1348 unsigned int buflen
;
1351 struct scatterlist
*sg
;
1353 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1354 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1355 buflen
= sg
->length
;
1357 buf
= cmd
->request_buffer
;
1358 buflen
= cmd
->request_bufflen
;
1366 * ata_scsi_rbuf_put - Unmap response buffer.
1367 * @cmd: SCSI command containing buffer to be unmapped.
1368 * @buf: buffer to unmap
1370 * Unmaps response buffer contained within @cmd.
1373 * spin_lock_irqsave(host_set lock)
1376 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1379 struct scatterlist
*sg
;
1381 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1382 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1387 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1388 * @args: device IDENTIFY data / SCSI command of interest.
1389 * @actor: Callback hook for desired SCSI command simulator
1391 * Takes care of the hard work of simulating a SCSI command...
1392 * Mapping the response buffer, calling the command's handler,
1393 * and handling the handler's return value. This return value
1394 * indicates whether the handler wishes the SCSI command to be
1395 * completed successfully (0), or not (in which case cmd->result
1396 * and sense buffer are assumed to be set).
1399 * spin_lock_irqsave(host_set lock)
1402 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1403 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1404 u8
*rbuf
, unsigned int buflen
))
1407 unsigned int buflen
, rc
;
1408 struct scsi_cmnd
*cmd
= args
->cmd
;
1410 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1411 memset(rbuf
, 0, buflen
);
1412 rc
= actor(args
, rbuf
, buflen
);
1413 ata_scsi_rbuf_put(cmd
, rbuf
);
1416 cmd
->result
= SAM_STAT_GOOD
;
1421 * ata_scsiop_inq_std - Simulate INQUIRY command
1422 * @args: device IDENTIFY data / SCSI command of interest.
1423 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1424 * @buflen: Response buffer length.
1426 * Returns standard device identification data associated
1427 * with non-EVPD INQUIRY command output.
1430 * spin_lock_irqsave(host_set lock)
1433 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1434 unsigned int buflen
)
1439 0x5, /* claim SPC-3 version compatibility */
1444 /* set scsi removeable (RMB) bit per ata bit */
1445 if (ata_id_removeable(args
->id
))
1450 memcpy(rbuf
, hdr
, sizeof(hdr
));
1453 memcpy(&rbuf
[8], "ATA ", 8);
1454 ata_dev_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1455 ata_dev_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1456 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1457 memcpy(&rbuf
[32], "n/a ", 4);
1461 const u8 versions
[] = {
1462 0x60, /* SAM-3 (no version claimed) */
1465 0x20, /* SBC-2 (no version claimed) */
1468 0x60 /* SPC-3 (no version claimed) */
1471 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1478 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1479 * @args: device IDENTIFY data / SCSI command of interest.
1480 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1481 * @buflen: Response buffer length.
1483 * Returns list of inquiry EVPD pages available.
1486 * spin_lock_irqsave(host_set lock)
1489 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1490 unsigned int buflen
)
1492 const u8 pages
[] = {
1493 0x00, /* page 0x00, this page */
1494 0x80, /* page 0x80, unit serial no page */
1495 0x83 /* page 0x83, device ident page */
1497 rbuf
[3] = sizeof(pages
); /* number of supported EVPD pages */
1500 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1506 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1507 * @args: device IDENTIFY data / SCSI command of interest.
1508 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1509 * @buflen: Response buffer length.
1511 * Returns ATA device serial number.
1514 * spin_lock_irqsave(host_set lock)
1517 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1518 unsigned int buflen
)
1522 0x80, /* this page code */
1524 ATA_SERNO_LEN
, /* page len */
1526 memcpy(rbuf
, hdr
, sizeof(hdr
));
1528 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1529 ata_dev_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1530 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1535 static const char *inq_83_str
= "Linux ATA-SCSI simulator";
1538 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1539 * @args: device IDENTIFY data / SCSI command of interest.
1540 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1541 * @buflen: Response buffer length.
1543 * Returns device identification. Currently hardcoded to
1544 * return "Linux ATA-SCSI simulator".
1547 * spin_lock_irqsave(host_set lock)
1550 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1551 unsigned int buflen
)
1553 rbuf
[1] = 0x83; /* this page code */
1554 rbuf
[3] = 4 + strlen(inq_83_str
); /* page len */
1556 /* our one and only identification descriptor (vendor-specific) */
1557 if (buflen
> (strlen(inq_83_str
) + 4 + 4 - 1)) {
1558 rbuf
[4 + 0] = 2; /* code set: ASCII */
1559 rbuf
[4 + 3] = strlen(inq_83_str
);
1560 memcpy(rbuf
+ 4 + 4, inq_83_str
, strlen(inq_83_str
));
1567 * ata_scsiop_noop - Command handler that simply returns success.
1568 * @args: device IDENTIFY data / SCSI command of interest.
1569 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1570 * @buflen: Response buffer length.
1572 * No operation. Simply returns success to caller, to indicate
1573 * that the caller should successfully complete this SCSI command.
1576 * spin_lock_irqsave(host_set lock)
1579 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1580 unsigned int buflen
)
1587 * ata_msense_push - Push data onto MODE SENSE data output buffer
1588 * @ptr_io: (input/output) Location to store more output data
1589 * @last: End of output data buffer
1590 * @buf: Pointer to BLOB being added to output buffer
1591 * @buflen: Length of BLOB
1593 * Store MODE SENSE data on an output buffer.
1599 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1600 const u8
*buf
, unsigned int buflen
)
1604 if ((ptr
+ buflen
- 1) > last
)
1607 memcpy(ptr
, buf
, buflen
);
1615 * ata_msense_caching - Simulate MODE SENSE caching info page
1616 * @id: device IDENTIFY data
1617 * @ptr_io: (input/output) Location to store more output data
1618 * @last: End of output data buffer
1620 * Generate a caching info page, which conditionally indicates
1621 * write caching to the SCSI layer, depending on device
1628 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1631 u8 page
[CACHE_MPAGE_LEN
];
1633 memcpy(page
, def_cache_mpage
, sizeof(page
));
1634 if (ata_id_wcache_enabled(id
))
1635 page
[2] |= (1 << 2); /* write cache enable */
1636 if (!ata_id_rahead_enabled(id
))
1637 page
[12] |= (1 << 5); /* disable read ahead */
1639 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1640 return sizeof(page
);
1644 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1645 * @dev: Device associated with this MODE SENSE command
1646 * @ptr_io: (input/output) Location to store more output data
1647 * @last: End of output data buffer
1649 * Generate a generic MODE SENSE control mode page.
1655 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1657 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1658 sizeof(def_control_mpage
));
1659 return sizeof(def_control_mpage
);
1663 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1664 * @dev: Device associated with this MODE SENSE command
1665 * @ptr_io: (input/output) Location to store more output data
1666 * @last: End of output data buffer
1668 * Generate a generic MODE SENSE r/w error recovery page.
1674 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1677 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1678 sizeof(def_rw_recovery_mpage
));
1679 return sizeof(def_rw_recovery_mpage
);
1683 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1684 * @args: device IDENTIFY data / SCSI command of interest.
1685 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1686 * @buflen: Response buffer length.
1688 * Simulate MODE SENSE commands. Assume this is invoked for direct
1689 * access devices (e.g. disks) only. There should be no block
1690 * descriptor for other device types.
1693 * spin_lock_irqsave(host_set lock)
1696 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1697 unsigned int buflen
)
1699 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1700 const u8 sat_blk_desc
[] = {
1701 0, 0, 0, 0, /* number of blocks: sat unspecified */
1703 0, 0x2, 0x0 /* block length: 512 bytes */
1706 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1710 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1711 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1713 * LLBA bit in msense(10) ignored (compliant)
1716 page_control
= scsicmd
[2] >> 6;
1717 switch (page_control
) {
1718 case 0: /* current */
1719 break; /* supported */
1721 goto saving_not_supp
;
1722 case 1: /* changeable */
1723 case 2: /* defaults */
1729 output_len
= 4 + (ebd
? 8 : 0);
1730 alloc_len
= scsicmd
[4];
1732 output_len
= 8 + (ebd
? 8 : 0);
1733 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1735 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1737 p
= rbuf
+ output_len
;
1738 last
= rbuf
+ minlen
- 1;
1740 pg
= scsicmd
[2] & 0x3f;
1743 * No mode subpages supported (yet) but asking for _all_
1744 * subpages may be valid
1746 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
1750 case RW_RECOVERY_MPAGE
:
1751 output_len
+= ata_msense_rw_recovery(&p
, last
);
1755 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1758 case CONTROL_MPAGE
: {
1759 output_len
+= ata_msense_ctl_mode(&p
, last
);
1764 output_len
+= ata_msense_rw_recovery(&p
, last
);
1765 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1766 output_len
+= ata_msense_ctl_mode(&p
, last
);
1769 default: /* invalid page code */
1777 rbuf
[0] = output_len
;
1780 rbuf
[3] = sizeof(sat_blk_desc
);
1782 memcpy(rbuf
+ 4, sat_blk_desc
,
1783 sizeof(sat_blk_desc
));
1787 rbuf
[0] = output_len
>> 8;
1789 rbuf
[1] = output_len
;
1792 rbuf
[7] = sizeof(sat_blk_desc
);
1794 memcpy(rbuf
+ 8, sat_blk_desc
,
1795 sizeof(sat_blk_desc
));
1801 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1802 /* "Invalid field in cbd" */
1806 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
1807 /* "Saving parameters not supported" */
1812 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1813 * @args: device IDENTIFY data / SCSI command of interest.
1814 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1815 * @buflen: Response buffer length.
1817 * Simulate READ CAPACITY commands.
1820 * spin_lock_irqsave(host_set lock)
1823 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1824 unsigned int buflen
)
1831 if (ata_id_has_lba(args
->id
)) {
1832 if (ata_id_has_lba48(args
->id
))
1833 n_sectors
= ata_id_u64(args
->id
, 100);
1835 n_sectors
= ata_id_u32(args
->id
, 60);
1837 /* CHS default translation */
1838 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1840 if (ata_id_current_chs_valid(args
->id
))
1841 /* CHS current translation */
1842 n_sectors
= ata_id_u32(args
->id
, 57);
1845 n_sectors
--; /* ATA TotalUserSectors - 1 */
1847 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1848 if( n_sectors
>= 0xffffffffULL
)
1849 tmp
= 0xffffffff ; /* Return max count on overflow */
1853 /* sector count, 32-bit */
1854 rbuf
[0] = tmp
>> (8 * 3);
1855 rbuf
[1] = tmp
>> (8 * 2);
1856 rbuf
[2] = tmp
>> (8 * 1);
1860 tmp
= ATA_SECT_SIZE
;
1865 /* sector count, 64-bit */
1866 tmp
= n_sectors
>> (8 * 4);
1867 rbuf
[2] = tmp
>> (8 * 3);
1868 rbuf
[3] = tmp
>> (8 * 2);
1869 rbuf
[4] = tmp
>> (8 * 1);
1872 rbuf
[6] = tmp
>> (8 * 3);
1873 rbuf
[7] = tmp
>> (8 * 2);
1874 rbuf
[8] = tmp
>> (8 * 1);
1878 tmp
= ATA_SECT_SIZE
;
1879 rbuf
[12] = tmp
>> 8;
1887 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1888 * @args: device IDENTIFY data / SCSI command of interest.
1889 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1890 * @buflen: Response buffer length.
1892 * Simulate REPORT LUNS command.
1895 * spin_lock_irqsave(host_set lock)
1898 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1899 unsigned int buflen
)
1902 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1908 * ata_scsi_set_sense - Set SCSI sense data and status
1909 * @cmd: SCSI request to be handled
1910 * @sk: SCSI-defined sense key
1911 * @asc: SCSI-defined additional sense code
1912 * @ascq: SCSI-defined additional sense code qualifier
1914 * Helper function that builds a valid fixed format, current
1915 * response code and the given sense key (sk), additional sense
1916 * code (asc) and additional sense code qualifier (ascq) with
1917 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
1918 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
1924 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
1926 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1928 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
1929 cmd
->sense_buffer
[2] = sk
;
1930 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
1931 cmd
->sense_buffer
[12] = asc
;
1932 cmd
->sense_buffer
[13] = ascq
;
1936 * ata_scsi_badcmd - End a SCSI request with an error
1937 * @cmd: SCSI request to be handled
1938 * @done: SCSI command completion function
1939 * @asc: SCSI-defined additional sense code
1940 * @ascq: SCSI-defined additional sense code qualifier
1942 * Helper function that completes a SCSI command with
1943 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1944 * and the specified additional sense codes.
1947 * spin_lock_irqsave(host_set lock)
1950 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
1953 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
1958 static int atapi_sense_complete(struct ata_queued_cmd
*qc
,unsigned int err_mask
)
1960 if (err_mask
&& ((err_mask
& AC_ERR_DEV
) == 0))
1961 /* FIXME: not quite right; we don't want the
1962 * translation of taskfile registers into
1963 * a sense descriptors, since that's only
1964 * correct for ATA, not ATAPI
1966 ata_gen_ata_desc_sense(qc
);
1968 qc
->scsidone(qc
->scsicmd
);
1972 /* is it pointless to prefer PIO for "safety reasons"? */
1973 static inline int ata_pio_use_silly(struct ata_port
*ap
)
1975 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
1978 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
1980 struct ata_port
*ap
= qc
->ap
;
1981 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1983 DPRINTK("ATAPI request sense\n");
1985 /* FIXME: is this needed? */
1986 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
1988 ap
->ops
->tf_read(ap
, &qc
->tf
);
1990 /* fill these in, for the case where they are -not- overwritten */
1991 cmd
->sense_buffer
[0] = 0x70;
1992 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
1996 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
1997 qc
->dma_dir
= DMA_FROM_DEVICE
;
1999 memset(&qc
->cdb
, 0, ap
->cdb_len
);
2000 qc
->cdb
[0] = REQUEST_SENSE
;
2001 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2003 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2004 qc
->tf
.command
= ATA_CMD_PACKET
;
2006 if (ata_pio_use_silly(ap
)) {
2007 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2008 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2010 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2011 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2012 qc
->tf
.lbah
= (8 * 1024) >> 8;
2014 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2016 qc
->complete_fn
= atapi_sense_complete
;
2018 if (ata_qc_issue(qc
))
2019 ata_qc_complete(qc
, AC_ERR_OTHER
);
2024 static int atapi_qc_complete(struct ata_queued_cmd
*qc
, unsigned int err_mask
)
2026 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2028 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2030 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2031 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2032 atapi_request_sense(qc
);
2036 else if (unlikely(err_mask
))
2037 /* FIXME: not quite right; we don't want the
2038 * translation of taskfile registers into
2039 * a sense descriptors, since that's only
2040 * correct for ATA, not ATAPI
2042 ata_gen_ata_desc_sense(qc
);
2045 u8
*scsicmd
= cmd
->cmnd
;
2047 if (scsicmd
[0] == INQUIRY
) {
2049 unsigned int buflen
;
2051 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2053 /* ATAPI devices typically report zero for their SCSI version,
2054 * and sometimes deviate from the spec WRT response data
2055 * format. If SCSI version is reported as zero like normal,
2056 * then we make the following fixups: 1) Fake MMC-5 version,
2057 * to indicate to the Linux scsi midlayer this is a modern
2058 * device. 2) Ensure response data format / ATAPI information
2059 * are always correct.
2061 /* FIXME: do we ever override EVPD pages and the like, with
2069 ata_scsi_rbuf_put(cmd
, buf
);
2072 cmd
->result
= SAM_STAT_GOOD
;
2079 * atapi_xlat - Initialize PACKET taskfile
2080 * @qc: command structure to be initialized
2081 * @scsicmd: SCSI CDB associated with this PACKET command
2084 * spin_lock_irqsave(host_set lock)
2087 * Zero on success, non-zero on failure.
2090 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2092 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2093 struct ata_device
*dev
= qc
->dev
;
2094 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2095 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2098 /* Check whether ATAPI DMA is safe */
2099 if (ata_check_atapi_dma(qc
))
2102 memcpy(&qc
->cdb
, scsicmd
, qc
->ap
->cdb_len
);
2104 qc
->complete_fn
= atapi_qc_complete
;
2106 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2107 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2108 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2109 DPRINTK("direction: write\n");
2112 qc
->tf
.command
= ATA_CMD_PACKET
;
2114 /* no data, or PIO data xfer */
2115 if (using_pio
|| nodata
) {
2117 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2119 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2120 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2121 qc
->tf
.lbah
= (8 * 1024) >> 8;
2126 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2127 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2129 #ifdef ATAPI_ENABLE_DMADIR
2130 /* some SATA bridges need us to indicate data xfer direction */
2131 if (cmd
->sc_data_direction
!= DMA_TO_DEVICE
)
2132 qc
->tf
.feature
|= ATAPI_DMADIR
;
2136 qc
->nbytes
= cmd
->bufflen
;
2142 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2143 * @ap: ATA port to which the device is attached
2144 * @scsidev: SCSI device from which we derive the ATA device
2146 * Given various information provided in struct scsi_cmnd,
2147 * map that onto an ATA bus, and using that mapping
2148 * determine which ata_device is associated with the
2149 * SCSI command to be sent.
2152 * spin_lock_irqsave(host_set lock)
2155 * Associated ATA device, or %NULL if not found.
2158 static struct ata_device
*
2159 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2161 struct ata_device
*dev
;
2163 /* skip commands not addressed to targets we simulate */
2164 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
2165 dev
= &ap
->device
[scsidev
->id
];
2169 if (unlikely((scsidev
->channel
!= 0) ||
2170 (scsidev
->lun
!= 0)))
2173 if (unlikely(!ata_dev_present(dev
)))
2176 if (!atapi_enabled
) {
2177 if (unlikely(dev
->class == ATA_DEV_ATAPI
))
2185 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2186 * @byte1: Byte 1 from pass-thru CDB.
2189 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2192 ata_scsi_map_proto(u8 byte1
)
2194 switch((byte1
& 0x1e) >> 1) {
2195 case 3: /* Non-data */
2196 return ATA_PROT_NODATA
;
2199 return ATA_PROT_DMA
;
2201 case 4: /* PIO Data-in */
2202 case 5: /* PIO Data-out */
2204 return ATA_PROT_PIO_MULT
;
2206 return ATA_PROT_PIO
;
2208 case 10: /* Device Reset */
2209 case 0: /* Hard Reset */
2211 case 2: /* Bus Idle */
2212 case 7: /* Packet */
2213 case 8: /* DMA Queued */
2214 case 9: /* Device Diagnostic */
2215 case 11: /* UDMA Data-in */
2216 case 12: /* UDMA Data-Out */
2217 case 13: /* FPDMA */
2218 default: /* Reserved */
2222 return ATA_PROT_UNKNOWN
;
2226 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2227 * @qc: command structure to be initialized
2228 * @scsicmd: SCSI command to convert
2230 * Handles either 12 or 16-byte versions of the CDB.
2233 * Zero on success, non-zero on failure.
2236 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2238 struct ata_taskfile
*tf
= &(qc
->tf
);
2239 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2241 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2245 * 12 and 16 byte CDBs use different offsets to
2246 * provide the various register values.
2248 if (scsicmd
[0] == ATA_16
) {
2250 * 16-byte CDB - may contain extended commands.
2252 * If that is the case, copy the upper byte register values.
2254 if (scsicmd
[1] & 0x01) {
2255 tf
->hob_feature
= scsicmd
[3];
2256 tf
->hob_nsect
= scsicmd
[5];
2257 tf
->hob_lbal
= scsicmd
[7];
2258 tf
->hob_lbam
= scsicmd
[9];
2259 tf
->hob_lbah
= scsicmd
[11];
2260 tf
->flags
|= ATA_TFLAG_LBA48
;
2262 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2265 * Always copy low byte, device and command registers.
2267 tf
->feature
= scsicmd
[4];
2268 tf
->nsect
= scsicmd
[6];
2269 tf
->lbal
= scsicmd
[8];
2270 tf
->lbam
= scsicmd
[10];
2271 tf
->lbah
= scsicmd
[12];
2272 tf
->device
= scsicmd
[13];
2273 tf
->command
= scsicmd
[14];
2276 * 12-byte CDB - incapable of extended commands.
2278 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2280 tf
->feature
= scsicmd
[3];
2281 tf
->nsect
= scsicmd
[4];
2282 tf
->lbal
= scsicmd
[5];
2283 tf
->lbam
= scsicmd
[6];
2284 tf
->lbah
= scsicmd
[7];
2285 tf
->device
= scsicmd
[8];
2286 tf
->command
= scsicmd
[9];
2289 * If slave is possible, enforce correct master/slave bit
2291 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2292 tf
->device
= qc
->dev
->devno
?
2293 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2296 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2297 * SET_FEATURES - XFER MODE must be preceded/succeeded
2298 * by an update to hardware-specific registers for each
2299 * controller (i.e. the reason for ->set_piomode(),
2300 * ->set_dmamode(), and ->post_set_mode() hooks).
2302 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2303 && (tf
->feature
== SETFEATURES_XFER
))
2307 * Set flags so that all registers will be written,
2308 * and pass on write indication (used for PIO/DMA
2311 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2313 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2314 tf
->flags
|= ATA_TFLAG_WRITE
;
2317 * Set transfer length.
2319 * TODO: find out if we need to do more here to
2320 * cover scatter/gather case.
2322 qc
->nsect
= cmd
->bufflen
/ ATA_SECT_SIZE
;
2327 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2328 /* "Invalid field in cdb" */
2333 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2335 * @cmd: SCSI command opcode to consider
2337 * Look up the SCSI command given, and determine whether the
2338 * SCSI command is to be translated or simulated.
2341 * Pointer to translation function if possible, %NULL if not.
2344 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2354 return ata_scsi_rw_xlat
;
2356 case SYNCHRONIZE_CACHE
:
2357 if (ata_try_flush_cache(dev
))
2358 return ata_scsi_flush_xlat
;
2363 return ata_scsi_verify_xlat
;
2367 return ata_scsi_pass_thru
;
2370 return ata_scsi_start_stop_xlat
;
2377 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2378 * @ap: ATA port to which the command was being sent
2379 * @cmd: SCSI command to dump
2381 * Prints the contents of a SCSI command via printk().
2384 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2385 struct scsi_cmnd
*cmd
)
2388 struct scsi_device
*scsidev
= cmd
->device
;
2389 u8
*scsicmd
= cmd
->cmnd
;
2391 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2393 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2394 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2395 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2401 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2402 * @cmd: SCSI command to be sent
2403 * @done: Completion function, called when command is complete
2405 * In some cases, this function translates SCSI commands into
2406 * ATA taskfiles, and queues the taskfiles to be sent to
2407 * hardware. In other cases, this function simulates a
2408 * SCSI device by evaluating and responding to certain
2409 * SCSI commands. This creates the overall effect of
2410 * ATA and ATAPI devices appearing as SCSI devices.
2413 * Releases scsi-layer-held lock, and obtains host_set lock.
2419 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2421 struct ata_port
*ap
;
2422 struct ata_device
*dev
;
2423 struct scsi_device
*scsidev
= cmd
->device
;
2424 struct Scsi_Host
*shost
= scsidev
->host
;
2426 ap
= (struct ata_port
*) &shost
->hostdata
[0];
2428 spin_unlock(shost
->host_lock
);
2429 spin_lock(&ap
->host_set
->lock
);
2431 ata_scsi_dump_cdb(ap
, cmd
);
2433 dev
= ata_scsi_find_dev(ap
, scsidev
);
2434 if (unlikely(!dev
)) {
2435 cmd
->result
= (DID_BAD_TARGET
<< 16);
2440 if (dev
->class == ATA_DEV_ATA
) {
2441 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2445 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
2447 ata_scsi_simulate(dev
->id
, cmd
, done
);
2449 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
2452 spin_unlock(&ap
->host_set
->lock
);
2453 spin_lock(shost
->host_lock
);
2458 * ata_scsi_simulate - simulate SCSI command on ATA device
2459 * @id: current IDENTIFY data for target device.
2460 * @cmd: SCSI command being sent to device.
2461 * @done: SCSI command completion function.
2463 * Interprets and directly executes a select list of SCSI commands
2464 * that can be handled internally.
2467 * spin_lock_irqsave(host_set lock)
2470 void ata_scsi_simulate(u16
*id
,
2471 struct scsi_cmnd
*cmd
,
2472 void (*done
)(struct scsi_cmnd
*))
2474 struct ata_scsi_args args
;
2475 const u8
*scsicmd
= cmd
->cmnd
;
2481 switch(scsicmd
[0]) {
2482 /* no-op's, complete with success */
2483 case SYNCHRONIZE_CACHE
:
2487 case TEST_UNIT_READY
:
2488 case FORMAT_UNIT
: /* FIXME: correct? */
2489 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2490 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2494 if (scsicmd
[1] & 2) /* is CmdDt set? */
2495 ata_scsi_invalid_field(cmd
, done
);
2496 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2497 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2498 else if (scsicmd
[2] == 0x00)
2499 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2500 else if (scsicmd
[2] == 0x80)
2501 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2502 else if (scsicmd
[2] == 0x83)
2503 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2505 ata_scsi_invalid_field(cmd
, done
);
2510 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2513 case MODE_SELECT
: /* unconditionally return */
2514 case MODE_SELECT_10
: /* bad-field-in-cdb */
2515 ata_scsi_invalid_field(cmd
, done
);
2519 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2522 case SERVICE_ACTION_IN
:
2523 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2524 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2526 ata_scsi_invalid_field(cmd
, done
);
2530 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2533 /* mandatory commands we haven't implemented yet */
2536 /* all other commands */
2538 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2539 /* "Invalid command operation code" */
2545 void ata_scsi_scan_host(struct ata_port
*ap
)
2547 struct ata_device
*dev
;
2550 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
2553 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2554 dev
= &ap
->device
[i
];
2556 if (ata_dev_present(dev
))
2557 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);