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 ");
399 int ata_scsi_device_resume(struct scsi_device
*sdev
)
401 struct ata_port
*ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
402 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
404 return ata_device_resume(ap
, dev
);
407 int ata_scsi_device_suspend(struct scsi_device
*sdev
)
409 struct ata_port
*ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
410 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
412 return ata_device_suspend(ap
, dev
);
416 * ata_to_sense_error - convert ATA error to SCSI error
417 * @id: ATA device number
418 * @drv_stat: value contained in ATA status register
419 * @drv_err: value contained in ATA error register
420 * @sk: the sense key we'll fill out
421 * @asc: the additional sense code we'll fill out
422 * @ascq: the additional sense code qualifier we'll fill out
424 * Converts an ATA error into a SCSI error. Fill out pointers to
425 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
426 * format sense blocks.
429 * spin_lock_irqsave(host_set lock)
431 void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
, u8
*asc
,
436 /* Based on the 3ware driver translation table */
437 static const unsigned char sense_table
[][4] = {
439 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
441 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
443 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
444 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
445 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
446 /* MC|ID|ABRT|TRK0|MARK */
447 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
449 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
450 /* Bad address mark */
451 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
453 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
455 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
456 /* Media change request */
457 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
459 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
461 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
463 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
464 /* BBD - block marked bad */
465 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
466 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
468 static const unsigned char stat_table
[][4] = {
469 /* Must be first because BUSY means no other bits valid */
470 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
471 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
472 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
473 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
474 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
478 * Is this an error we can process/parse
480 if (drv_stat
& ATA_BUSY
) {
481 drv_err
= 0; /* Ignore the err bits, they're invalid */
485 /* Look for drv_err */
486 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
487 /* Look for best matches first */
488 if ((sense_table
[i
][0] & drv_err
) ==
490 *sk
= sense_table
[i
][1];
491 *asc
= sense_table
[i
][2];
492 *ascq
= sense_table
[i
][3];
496 /* No immediate match */
497 printk(KERN_WARNING
"ata%u: no sense translation for "
498 "error 0x%02x\n", id
, drv_err
);
501 /* Fall back to interpreting status bits */
502 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
503 if (stat_table
[i
][0] & drv_stat
) {
504 *sk
= stat_table
[i
][1];
505 *asc
= stat_table
[i
][2];
506 *ascq
= stat_table
[i
][3];
510 /* No error? Undecoded? */
511 printk(KERN_WARNING
"ata%u: no sense translation for status: 0x%02x\n",
514 /* For our last chance pick, use medium read error because
515 * it's much more common than an ATA drive telling you a write
519 *asc
= 0x11; /* "unrecovered read error" */
520 *ascq
= 0x04; /* "auto-reallocation failed" */
523 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x to "
524 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id
, drv_stat
, drv_err
,
530 * ata_gen_ata_desc_sense - Generate check condition sense block.
531 * @qc: Command that completed.
533 * This function is specific to the ATA descriptor format sense
534 * block specified for the ATA pass through commands. Regardless
535 * of whether the command errored or not, return a sense
536 * block. Copy all controller registers into the sense
537 * block. Clear sense key, ASC & ASCQ if there is no error.
540 * spin_lock_irqsave(host_set lock)
542 void ata_gen_ata_desc_sense(struct ata_queued_cmd
*qc
)
544 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
545 struct ata_taskfile
*tf
= &qc
->tf
;
546 unsigned char *sb
= cmd
->sense_buffer
;
547 unsigned char *desc
= sb
+ 8;
549 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
551 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
554 * Read the controller registers.
556 assert(NULL
!= qc
->ap
->ops
->tf_read
);
557 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
560 * Use ata_to_sense_error() to map status register bits
561 * onto sense key, asc & ascq.
563 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
564 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
565 &sb
[1], &sb
[2], &sb
[3]);
570 * Sense data is current and format is descriptor.
577 * Set length of additional sense data.
578 * Since we only populate descriptor 0, the total
579 * length is the same (fixed) length as descriptor 0.
581 desc
[1] = sb
[7] = 14;
584 * Copy registers into sense buffer.
587 desc
[3] = tf
->feature
; /* == error reg */
592 desc
[12] = tf
->device
;
593 desc
[13] = tf
->command
; /* == status reg */
596 * Fill in Extend bit, and the high order bytes
599 if (tf
->flags
& ATA_TFLAG_LBA48
) {
601 desc
[4] = tf
->hob_nsect
;
602 desc
[6] = tf
->hob_lbal
;
603 desc
[8] = tf
->hob_lbam
;
604 desc
[10] = tf
->hob_lbah
;
609 * ata_gen_fixed_sense - generate a SCSI fixed sense block
610 * @qc: Command that we are erroring out
612 * Leverage ata_to_sense_error() to give us the codes. Fit our
613 * LBA in here if there's room.
616 * inherited from caller
618 void ata_gen_fixed_sense(struct ata_queued_cmd
*qc
)
620 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
621 struct ata_taskfile
*tf
= &qc
->tf
;
622 unsigned char *sb
= cmd
->sense_buffer
;
624 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
626 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
629 * Read the controller registers.
631 assert(NULL
!= qc
->ap
->ops
->tf_read
);
632 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
635 * Use ata_to_sense_error() to map status register bits
636 * onto sense key, asc & ascq.
638 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
639 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
640 &sb
[2], &sb
[12], &sb
[13]);
647 if (tf
->flags
& ATA_TFLAG_LBA48
) {
648 /* TODO: find solution for LBA48 descriptors */
651 else if (tf
->flags
& ATA_TFLAG_LBA
) {
652 /* A small (28b) LBA will fit in the 32b info field */
653 sb
[0] |= 0x80; /* set valid bit */
654 sb
[3] = tf
->device
& 0x0f;
666 * ata_scsi_slave_config - Set SCSI device attributes
667 * @sdev: SCSI device to examine
669 * This is called before we actually start reading
670 * and writing to the device, to configure certain
671 * SCSI mid-layer behaviors.
674 * Defined by SCSI layer. We don't really care.
677 int ata_scsi_slave_config(struct scsi_device
*sdev
)
679 sdev
->use_10_for_rw
= 1;
680 sdev
->use_10_for_ms
= 1;
682 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
684 if (sdev
->id
< ATA_MAX_DEVICES
) {
686 struct ata_device
*dev
;
688 ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
689 dev
= &ap
->device
[sdev
->id
];
691 /* TODO: 1024 is an arbitrary number, not the
692 * hardware maximum. This should be increased to
693 * 65534 when Jens Axboe's patch for dynamically
694 * determining max_sectors is merged.
696 if ((dev
->flags
& ATA_DFLAG_LBA48
) &&
697 ((dev
->flags
& ATA_DFLAG_LOCK_SECTORS
) == 0)) {
699 * do not overwrite sdev->host->max_sectors, since
700 * other drives on this host may not support LBA48
702 blk_queue_max_sectors(sdev
->request_queue
, 2048);
706 * SATA DMA transfers must be multiples of 4 byte, so
707 * we need to pad ATAPI transfers using an extra sg.
708 * Decrement max hw segments accordingly.
710 if (dev
->class == ATA_DEV_ATAPI
) {
711 request_queue_t
*q
= sdev
->request_queue
;
712 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
716 return 0; /* scsi layer doesn't check return value, sigh */
720 * ata_scsi_error - SCSI layer error handler callback
721 * @host: SCSI host on which error occurred
723 * Handles SCSI-layer-thrown error events.
726 * Inherited from SCSI layer (none, can sleep)
732 int ata_scsi_error(struct Scsi_Host
*host
)
738 ap
= (struct ata_port
*) &host
->hostdata
[0];
739 ap
->ops
->eng_timeout(ap
);
741 assert(host
->host_failed
== 0 && list_empty(&host
->eh_cmd_q
));
743 scsi_eh_flush_done_q(&ap
->eh_done_q
);
749 static void ata_eh_scsidone(struct scsi_cmnd
*scmd
)
754 static void __ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
756 struct ata_port
*ap
= qc
->ap
;
757 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
760 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
761 qc
->scsidone
= ata_eh_scsidone
;
763 assert(!ata_tag_valid(qc
->tag
));
764 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
766 scsi_eh_finish_cmd(scmd
, &ap
->eh_done_q
);
770 * ata_eh_qc_complete - Complete an active ATA command from EH
771 * @qc: Command to complete
773 * Indicate to the mid and upper layers that an ATA command has
774 * completed. To be used from EH.
776 void ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
778 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
779 scmd
->retries
= scmd
->allowed
;
780 __ata_eh_qc_complete(qc
);
784 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
785 * @qc: Command to retry
787 * Indicate to the mid and upper layers that an ATA command
788 * should be retried. To be used from EH.
790 * SCSI midlayer limits the number of retries to scmd->allowed.
791 * This function might need to adjust scmd->retries for commands
792 * which get retried due to unrelated NCQ failures.
794 void ata_eh_qc_retry(struct ata_queued_cmd
*qc
)
796 __ata_eh_qc_complete(qc
);
800 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
801 * @qc: Storage for translated ATA taskfile
802 * @scsicmd: SCSI command to translate
804 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
805 * (to start). Perhaps these commands should be preceded by
806 * CHECK POWER MODE to see what power mode the device is already in.
807 * [See SAT revision 5 at www.t10.org]
810 * spin_lock_irqsave(host_set lock)
813 * Zero on success, non-zero on error.
816 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
819 struct ata_taskfile
*tf
= &qc
->tf
;
821 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
822 tf
->protocol
= ATA_PROT_NODATA
;
823 if (scsicmd
[1] & 0x1) {
824 ; /* ignore IMMED bit, violates sat-r05 */
826 if (scsicmd
[4] & 0x2)
827 goto invalid_fld
; /* LOEJ bit set not supported */
828 if (((scsicmd
[4] >> 4) & 0xf) != 0)
829 goto invalid_fld
; /* power conditions not supported */
830 if (scsicmd
[4] & 0x1) {
831 tf
->nsect
= 1; /* 1 sector, lba=0 */
833 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
834 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
839 tf
->device
|= ATA_LBA
;
842 tf
->lbal
= 0x1; /* sect */
843 tf
->lbam
= 0x0; /* cyl low */
844 tf
->lbah
= 0x0; /* cyl high */
847 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
849 tf
->nsect
= 0; /* time period value (0 implies now) */
850 tf
->command
= ATA_CMD_STANDBY
;
851 /* Consider: ATA STANDBY IMMEDIATE command */
854 * Standby and Idle condition timers could be implemented but that
855 * would require libata to implement the Power condition mode page
856 * and allow the user to change it. Changing mode pages requires
857 * MODE SELECT to be implemented.
863 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
864 /* "Invalid field in cbd" */
870 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
871 * @qc: Storage for translated ATA taskfile
872 * @scsicmd: SCSI command to translate (ignored)
874 * Sets up an ATA taskfile to issue FLUSH CACHE or
878 * spin_lock_irqsave(host_set lock)
881 * Zero on success, non-zero on error.
884 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
886 struct ata_taskfile
*tf
= &qc
->tf
;
888 tf
->flags
|= ATA_TFLAG_DEVICE
;
889 tf
->protocol
= ATA_PROT_NODATA
;
891 if ((qc
->dev
->flags
& ATA_DFLAG_LBA48
) &&
892 (ata_id_has_flush_ext(qc
->dev
->id
)))
893 tf
->command
= ATA_CMD_FLUSH_EXT
;
895 tf
->command
= ATA_CMD_FLUSH
;
901 * scsi_6_lba_len - Get LBA and transfer length
902 * @scsicmd: SCSI command to translate
904 * Calculate LBA and transfer length for 6-byte commands.
908 * @plen: the transfer length
911 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
916 VPRINTK("six-byte command\n");
918 lba
|= ((u64
)scsicmd
[2]) << 8;
919 lba
|= ((u64
)scsicmd
[3]);
921 len
|= ((u32
)scsicmd
[4]);
928 * scsi_10_lba_len - Get LBA and transfer length
929 * @scsicmd: SCSI command to translate
931 * Calculate LBA and transfer length for 10-byte commands.
935 * @plen: the transfer length
938 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
943 VPRINTK("ten-byte command\n");
945 lba
|= ((u64
)scsicmd
[2]) << 24;
946 lba
|= ((u64
)scsicmd
[3]) << 16;
947 lba
|= ((u64
)scsicmd
[4]) << 8;
948 lba
|= ((u64
)scsicmd
[5]);
950 len
|= ((u32
)scsicmd
[7]) << 8;
951 len
|= ((u32
)scsicmd
[8]);
958 * scsi_16_lba_len - Get LBA and transfer length
959 * @scsicmd: SCSI command to translate
961 * Calculate LBA and transfer length for 16-byte commands.
965 * @plen: the transfer length
968 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
973 VPRINTK("sixteen-byte command\n");
975 lba
|= ((u64
)scsicmd
[2]) << 56;
976 lba
|= ((u64
)scsicmd
[3]) << 48;
977 lba
|= ((u64
)scsicmd
[4]) << 40;
978 lba
|= ((u64
)scsicmd
[5]) << 32;
979 lba
|= ((u64
)scsicmd
[6]) << 24;
980 lba
|= ((u64
)scsicmd
[7]) << 16;
981 lba
|= ((u64
)scsicmd
[8]) << 8;
982 lba
|= ((u64
)scsicmd
[9]);
984 len
|= ((u32
)scsicmd
[10]) << 24;
985 len
|= ((u32
)scsicmd
[11]) << 16;
986 len
|= ((u32
)scsicmd
[12]) << 8;
987 len
|= ((u32
)scsicmd
[13]);
994 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
995 * @qc: Storage for translated ATA taskfile
996 * @scsicmd: SCSI command to translate
998 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1001 * spin_lock_irqsave(host_set lock)
1004 * Zero on success, non-zero on error.
1007 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1009 struct ata_taskfile
*tf
= &qc
->tf
;
1010 struct ata_device
*dev
= qc
->dev
;
1011 u64 dev_sectors
= qc
->dev
->n_sectors
;
1015 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1016 tf
->protocol
= ATA_PROT_NODATA
;
1018 if (scsicmd
[0] == VERIFY
)
1019 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1020 else if (scsicmd
[0] == VERIFY_16
)
1021 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1027 if (block
>= dev_sectors
)
1029 if ((block
+ n_block
) > dev_sectors
)
1032 if (dev
->flags
& ATA_DFLAG_LBA
) {
1033 tf
->flags
|= ATA_TFLAG_LBA
;
1035 if (lba_28_ok(block
, n_block
)) {
1037 tf
->command
= ATA_CMD_VERIFY
;
1038 tf
->device
|= (block
>> 24) & 0xf;
1039 } else if (lba_48_ok(block
, n_block
)) {
1040 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1044 tf
->flags
|= ATA_TFLAG_LBA48
;
1045 tf
->command
= ATA_CMD_VERIFY_EXT
;
1047 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1049 tf
->hob_lbah
= (block
>> 40) & 0xff;
1050 tf
->hob_lbam
= (block
>> 32) & 0xff;
1051 tf
->hob_lbal
= (block
>> 24) & 0xff;
1053 /* request too large even for LBA48 */
1056 tf
->nsect
= n_block
& 0xff;
1058 tf
->lbah
= (block
>> 16) & 0xff;
1059 tf
->lbam
= (block
>> 8) & 0xff;
1060 tf
->lbal
= block
& 0xff;
1062 tf
->device
|= ATA_LBA
;
1065 u32 sect
, head
, cyl
, track
;
1067 if (!lba_28_ok(block
, n_block
))
1070 /* Convert LBA to CHS */
1071 track
= (u32
)block
/ dev
->sectors
;
1072 cyl
= track
/ dev
->heads
;
1073 head
= track
% dev
->heads
;
1074 sect
= (u32
)block
% dev
->sectors
+ 1;
1076 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1077 (u32
)block
, track
, cyl
, head
, sect
);
1079 /* Check whether the converted CHS can fit.
1083 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1086 tf
->command
= ATA_CMD_VERIFY
;
1087 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1090 tf
->lbah
= cyl
>> 8;
1097 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1098 /* "Invalid field in cbd" */
1102 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1103 /* "Logical Block Address out of range" */
1107 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1112 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1113 * @qc: Storage for translated ATA taskfile
1114 * @scsicmd: SCSI command to translate
1116 * Converts any of six SCSI read/write commands into the
1117 * ATA counterpart, including starting sector (LBA),
1118 * sector count, and taking into account the device's LBA48
1121 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1122 * %WRITE_16 are currently supported.
1125 * spin_lock_irqsave(host_set lock)
1128 * Zero on success, non-zero on error.
1131 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1133 struct ata_taskfile
*tf
= &qc
->tf
;
1134 struct ata_device
*dev
= qc
->dev
;
1138 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1140 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1141 scsicmd
[0] == WRITE_16
)
1142 tf
->flags
|= ATA_TFLAG_WRITE
;
1144 /* Calculate the SCSI LBA, transfer length and FUA. */
1145 switch (scsicmd
[0]) {
1148 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1149 if (unlikely(scsicmd
[1] & (1 << 3)))
1150 tf
->flags
|= ATA_TFLAG_FUA
;
1154 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1156 /* for 6-byte r/w commands, transfer length 0
1157 * means 256 blocks of data, not 0 block.
1164 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1165 if (unlikely(scsicmd
[1] & (1 << 3)))
1166 tf
->flags
|= ATA_TFLAG_FUA
;
1169 DPRINTK("no-byte command\n");
1173 /* Check and compose ATA command */
1175 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1176 * length 0 means transfer 0 block of data.
1177 * However, for ATA R/W commands, sector count 0 means
1178 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1180 * WARNING: one or two older ATA drives treat 0 as 0...
1184 if (dev
->flags
& ATA_DFLAG_LBA
) {
1185 tf
->flags
|= ATA_TFLAG_LBA
;
1187 if (lba_28_ok(block
, n_block
)) {
1189 tf
->device
|= (block
>> 24) & 0xf;
1190 } else if (lba_48_ok(block
, n_block
)) {
1191 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1195 tf
->flags
|= ATA_TFLAG_LBA48
;
1197 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1199 tf
->hob_lbah
= (block
>> 40) & 0xff;
1200 tf
->hob_lbam
= (block
>> 32) & 0xff;
1201 tf
->hob_lbal
= (block
>> 24) & 0xff;
1203 /* request too large even for LBA48 */
1206 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1209 qc
->nsect
= n_block
;
1210 tf
->nsect
= n_block
& 0xff;
1212 tf
->lbah
= (block
>> 16) & 0xff;
1213 tf
->lbam
= (block
>> 8) & 0xff;
1214 tf
->lbal
= block
& 0xff;
1216 tf
->device
|= ATA_LBA
;
1219 u32 sect
, head
, cyl
, track
;
1221 /* The request -may- be too large for CHS addressing. */
1222 if (!lba_28_ok(block
, n_block
))
1225 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1228 /* Convert LBA to CHS */
1229 track
= (u32
)block
/ dev
->sectors
;
1230 cyl
= track
/ dev
->heads
;
1231 head
= track
% dev
->heads
;
1232 sect
= (u32
)block
% dev
->sectors
+ 1;
1234 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1235 (u32
)block
, track
, cyl
, head
, sect
);
1237 /* Check whether the converted CHS can fit.
1241 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1244 qc
->nsect
= n_block
;
1245 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1248 tf
->lbah
= cyl
>> 8;
1255 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1256 /* "Invalid field in cbd" */
1260 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1261 /* "Logical Block Address out of range" */
1265 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1269 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1271 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1272 u8
*cdb
= cmd
->cmnd
;
1273 int need_sense
= (qc
->err_mask
!= 0);
1275 /* For ATA pass thru (SAT) commands, generate a sense block if
1276 * user mandated it or if there's an error. Note that if we
1277 * generate because the user forced us to, a check condition
1278 * is generated and the ATA register values are returned
1279 * whether the command completed successfully or not. If there
1280 * was no error, SK, ASC and ASCQ will all be zero.
1282 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1283 ((cdb
[2] & 0x20) || need_sense
)) {
1284 ata_gen_ata_desc_sense(qc
);
1287 cmd
->result
= SAM_STAT_GOOD
;
1289 /* TODO: decide which descriptor format to use
1290 * for 48b LBA devices and call that here
1291 * instead of the fixed desc, which is only
1292 * good for smaller LBA (and maybe CHS?)
1295 ata_gen_fixed_sense(qc
);
1300 /* The ata_gen_..._sense routines fill in tf */
1301 ata_dump_status(qc
->ap
->id
, &qc
->tf
);
1310 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1311 * @ap: ATA port to which the command is addressed
1312 * @dev: ATA device to which the command is addressed
1313 * @cmd: SCSI command to execute
1314 * @done: SCSI command completion function
1315 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1317 * Our ->queuecommand() function has decided that the SCSI
1318 * command issued can be directly translated into an ATA
1319 * command, rather than handled internally.
1321 * This function sets up an ata_queued_cmd structure for the
1322 * SCSI command, and sends that ata_queued_cmd to the hardware.
1324 * The xlat_func argument (actor) returns 0 if ready to execute
1325 * ATA command, else 1 to finish translation. If 1 is returned
1326 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1327 * to be set reflecting an error condition or clean (early)
1331 * spin_lock_irqsave(host_set lock)
1334 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
1335 struct scsi_cmnd
*cmd
,
1336 void (*done
)(struct scsi_cmnd
*),
1337 ata_xlat_func_t xlat_func
)
1339 struct ata_queued_cmd
*qc
;
1340 u8
*scsicmd
= cmd
->cmnd
;
1344 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
1348 /* data is present; dma-map it */
1349 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1350 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1351 if (unlikely(cmd
->request_bufflen
< 1)) {
1352 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
1353 ap
->id
, dev
->devno
);
1358 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1360 ata_sg_init_one(qc
, cmd
->request_buffer
,
1361 cmd
->request_bufflen
);
1363 qc
->dma_dir
= cmd
->sc_data_direction
;
1366 qc
->complete_fn
= ata_scsi_qc_complete
;
1368 if (xlat_func(qc
, scsicmd
))
1371 /* select device, send command to hardware */
1372 qc
->err_mask
= ata_qc_issue(qc
);
1374 ata_qc_complete(qc
);
1382 DPRINTK("EXIT - early finish (good or error)\n");
1388 cmd
->result
= (DID_ERROR
<< 16);
1390 DPRINTK("EXIT - internal\n");
1395 * ata_scsi_rbuf_get - Map response buffer.
1396 * @cmd: SCSI command containing buffer to be mapped.
1397 * @buf_out: Pointer to mapped area.
1399 * Maps buffer contained within SCSI command @cmd.
1402 * spin_lock_irqsave(host_set lock)
1405 * Length of response buffer.
1408 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1411 unsigned int buflen
;
1414 struct scatterlist
*sg
;
1416 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1417 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1418 buflen
= sg
->length
;
1420 buf
= cmd
->request_buffer
;
1421 buflen
= cmd
->request_bufflen
;
1429 * ata_scsi_rbuf_put - Unmap response buffer.
1430 * @cmd: SCSI command containing buffer to be unmapped.
1431 * @buf: buffer to unmap
1433 * Unmaps response buffer contained within @cmd.
1436 * spin_lock_irqsave(host_set lock)
1439 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1442 struct scatterlist
*sg
;
1444 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1445 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1450 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1451 * @args: device IDENTIFY data / SCSI command of interest.
1452 * @actor: Callback hook for desired SCSI command simulator
1454 * Takes care of the hard work of simulating a SCSI command...
1455 * Mapping the response buffer, calling the command's handler,
1456 * and handling the handler's return value. This return value
1457 * indicates whether the handler wishes the SCSI command to be
1458 * completed successfully (0), or not (in which case cmd->result
1459 * and sense buffer are assumed to be set).
1462 * spin_lock_irqsave(host_set lock)
1465 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1466 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1467 u8
*rbuf
, unsigned int buflen
))
1470 unsigned int buflen
, rc
;
1471 struct scsi_cmnd
*cmd
= args
->cmd
;
1473 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1474 memset(rbuf
, 0, buflen
);
1475 rc
= actor(args
, rbuf
, buflen
);
1476 ata_scsi_rbuf_put(cmd
, rbuf
);
1479 cmd
->result
= SAM_STAT_GOOD
;
1484 * ata_scsiop_inq_std - Simulate INQUIRY command
1485 * @args: device IDENTIFY data / SCSI command of interest.
1486 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1487 * @buflen: Response buffer length.
1489 * Returns standard device identification data associated
1490 * with non-EVPD INQUIRY command output.
1493 * spin_lock_irqsave(host_set lock)
1496 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1497 unsigned int buflen
)
1502 0x5, /* claim SPC-3 version compatibility */
1507 /* set scsi removeable (RMB) bit per ata bit */
1508 if (ata_id_removeable(args
->id
))
1513 memcpy(rbuf
, hdr
, sizeof(hdr
));
1516 memcpy(&rbuf
[8], "ATA ", 8);
1517 ata_dev_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1518 ata_dev_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1519 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1520 memcpy(&rbuf
[32], "n/a ", 4);
1524 const u8 versions
[] = {
1525 0x60, /* SAM-3 (no version claimed) */
1528 0x20, /* SBC-2 (no version claimed) */
1531 0x60 /* SPC-3 (no version claimed) */
1534 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1541 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1542 * @args: device IDENTIFY data / SCSI command of interest.
1543 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1544 * @buflen: Response buffer length.
1546 * Returns list of inquiry EVPD pages available.
1549 * spin_lock_irqsave(host_set lock)
1552 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1553 unsigned int buflen
)
1555 const u8 pages
[] = {
1556 0x00, /* page 0x00, this page */
1557 0x80, /* page 0x80, unit serial no page */
1558 0x83 /* page 0x83, device ident page */
1560 rbuf
[3] = sizeof(pages
); /* number of supported EVPD pages */
1563 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1569 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1570 * @args: device IDENTIFY data / SCSI command of interest.
1571 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1572 * @buflen: Response buffer length.
1574 * Returns ATA device serial number.
1577 * spin_lock_irqsave(host_set lock)
1580 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1581 unsigned int buflen
)
1585 0x80, /* this page code */
1587 ATA_SERNO_LEN
, /* page len */
1589 memcpy(rbuf
, hdr
, sizeof(hdr
));
1591 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1592 ata_dev_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1593 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1598 static const char * const inq_83_str
= "Linux ATA-SCSI simulator";
1601 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1602 * @args: device IDENTIFY data / SCSI command of interest.
1603 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1604 * @buflen: Response buffer length.
1606 * Returns device identification. Currently hardcoded to
1607 * return "Linux ATA-SCSI simulator".
1610 * spin_lock_irqsave(host_set lock)
1613 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1614 unsigned int buflen
)
1616 rbuf
[1] = 0x83; /* this page code */
1617 rbuf
[3] = 4 + strlen(inq_83_str
); /* page len */
1619 /* our one and only identification descriptor (vendor-specific) */
1620 if (buflen
> (strlen(inq_83_str
) + 4 + 4 - 1)) {
1621 rbuf
[4 + 0] = 2; /* code set: ASCII */
1622 rbuf
[4 + 3] = strlen(inq_83_str
);
1623 memcpy(rbuf
+ 4 + 4, inq_83_str
, strlen(inq_83_str
));
1630 * ata_scsiop_noop - Command handler that simply returns success.
1631 * @args: device IDENTIFY data / SCSI command of interest.
1632 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1633 * @buflen: Response buffer length.
1635 * No operation. Simply returns success to caller, to indicate
1636 * that the caller should successfully complete this SCSI command.
1639 * spin_lock_irqsave(host_set lock)
1642 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1643 unsigned int buflen
)
1650 * ata_msense_push - Push data onto MODE SENSE data output buffer
1651 * @ptr_io: (input/output) Location to store more output data
1652 * @last: End of output data buffer
1653 * @buf: Pointer to BLOB being added to output buffer
1654 * @buflen: Length of BLOB
1656 * Store MODE SENSE data on an output buffer.
1662 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1663 const u8
*buf
, unsigned int buflen
)
1667 if ((ptr
+ buflen
- 1) > last
)
1670 memcpy(ptr
, buf
, buflen
);
1678 * ata_msense_caching - Simulate MODE SENSE caching info page
1679 * @id: device IDENTIFY data
1680 * @ptr_io: (input/output) Location to store more output data
1681 * @last: End of output data buffer
1683 * Generate a caching info page, which conditionally indicates
1684 * write caching to the SCSI layer, depending on device
1691 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1694 u8 page
[CACHE_MPAGE_LEN
];
1696 memcpy(page
, def_cache_mpage
, sizeof(page
));
1697 if (ata_id_wcache_enabled(id
))
1698 page
[2] |= (1 << 2); /* write cache enable */
1699 if (!ata_id_rahead_enabled(id
))
1700 page
[12] |= (1 << 5); /* disable read ahead */
1702 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1703 return sizeof(page
);
1707 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1708 * @dev: Device associated with this MODE SENSE command
1709 * @ptr_io: (input/output) Location to store more output data
1710 * @last: End of output data buffer
1712 * Generate a generic MODE SENSE control mode page.
1718 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1720 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1721 sizeof(def_control_mpage
));
1722 return sizeof(def_control_mpage
);
1726 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1727 * @dev: Device associated with this MODE SENSE command
1728 * @ptr_io: (input/output) Location to store more output data
1729 * @last: End of output data buffer
1731 * Generate a generic MODE SENSE r/w error recovery page.
1737 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1740 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1741 sizeof(def_rw_recovery_mpage
));
1742 return sizeof(def_rw_recovery_mpage
);
1746 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1747 * @args: device IDENTIFY data / SCSI command of interest.
1748 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1749 * @buflen: Response buffer length.
1751 * Simulate MODE SENSE commands. Assume this is invoked for direct
1752 * access devices (e.g. disks) only. There should be no block
1753 * descriptor for other device types.
1756 * spin_lock_irqsave(host_set lock)
1759 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1760 unsigned int buflen
)
1762 struct ata_device
*dev
= args
->dev
;
1763 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1764 const u8 sat_blk_desc
[] = {
1765 0, 0, 0, 0, /* number of blocks: sat unspecified */
1767 0, 0x2, 0x0 /* block length: 512 bytes */
1770 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1775 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1776 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1778 * LLBA bit in msense(10) ignored (compliant)
1781 page_control
= scsicmd
[2] >> 6;
1782 switch (page_control
) {
1783 case 0: /* current */
1784 break; /* supported */
1786 goto saving_not_supp
;
1787 case 1: /* changeable */
1788 case 2: /* defaults */
1794 output_len
= 4 + (ebd
? 8 : 0);
1795 alloc_len
= scsicmd
[4];
1797 output_len
= 8 + (ebd
? 8 : 0);
1798 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1800 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1802 p
= rbuf
+ output_len
;
1803 last
= rbuf
+ minlen
- 1;
1805 pg
= scsicmd
[2] & 0x3f;
1808 * No mode subpages supported (yet) but asking for _all_
1809 * subpages may be valid
1811 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
1815 case RW_RECOVERY_MPAGE
:
1816 output_len
+= ata_msense_rw_recovery(&p
, last
);
1820 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1823 case CONTROL_MPAGE
: {
1824 output_len
+= ata_msense_ctl_mode(&p
, last
);
1829 output_len
+= ata_msense_rw_recovery(&p
, last
);
1830 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1831 output_len
+= ata_msense_ctl_mode(&p
, last
);
1834 default: /* invalid page code */
1842 if (ata_id_has_fua(args
->id
) && dev
->flags
& ATA_DFLAG_LBA48
&&
1843 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
1848 rbuf
[0] = output_len
;
1853 rbuf
[3] = sizeof(sat_blk_desc
);
1855 memcpy(rbuf
+ 4, sat_blk_desc
,
1856 sizeof(sat_blk_desc
));
1860 rbuf
[0] = output_len
>> 8;
1862 rbuf
[1] = output_len
;
1867 rbuf
[7] = sizeof(sat_blk_desc
);
1869 memcpy(rbuf
+ 8, sat_blk_desc
,
1870 sizeof(sat_blk_desc
));
1876 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1877 /* "Invalid field in cbd" */
1881 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
1882 /* "Saving parameters not supported" */
1887 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
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 READ CAPACITY commands.
1895 * spin_lock_irqsave(host_set lock)
1898 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1899 unsigned int buflen
)
1906 if (ata_id_has_lba(args
->id
)) {
1907 if (ata_id_has_lba48(args
->id
))
1908 n_sectors
= ata_id_u64(args
->id
, 100);
1910 n_sectors
= ata_id_u32(args
->id
, 60);
1912 /* CHS default translation */
1913 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1915 if (ata_id_current_chs_valid(args
->id
))
1916 /* CHS current translation */
1917 n_sectors
= ata_id_u32(args
->id
, 57);
1920 n_sectors
--; /* ATA TotalUserSectors - 1 */
1922 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1923 if( n_sectors
>= 0xffffffffULL
)
1924 tmp
= 0xffffffff ; /* Return max count on overflow */
1928 /* sector count, 32-bit */
1929 rbuf
[0] = tmp
>> (8 * 3);
1930 rbuf
[1] = tmp
>> (8 * 2);
1931 rbuf
[2] = tmp
>> (8 * 1);
1935 tmp
= ATA_SECT_SIZE
;
1940 /* sector count, 64-bit */
1941 tmp
= n_sectors
>> (8 * 4);
1942 rbuf
[2] = tmp
>> (8 * 3);
1943 rbuf
[3] = tmp
>> (8 * 2);
1944 rbuf
[4] = tmp
>> (8 * 1);
1947 rbuf
[6] = tmp
>> (8 * 3);
1948 rbuf
[7] = tmp
>> (8 * 2);
1949 rbuf
[8] = tmp
>> (8 * 1);
1953 tmp
= ATA_SECT_SIZE
;
1954 rbuf
[12] = tmp
>> 8;
1962 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1963 * @args: device IDENTIFY data / SCSI command of interest.
1964 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1965 * @buflen: Response buffer length.
1967 * Simulate REPORT LUNS command.
1970 * spin_lock_irqsave(host_set lock)
1973 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1974 unsigned int buflen
)
1977 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1983 * ata_scsi_set_sense - Set SCSI sense data and status
1984 * @cmd: SCSI request to be handled
1985 * @sk: SCSI-defined sense key
1986 * @asc: SCSI-defined additional sense code
1987 * @ascq: SCSI-defined additional sense code qualifier
1989 * Helper function that builds a valid fixed format, current
1990 * response code and the given sense key (sk), additional sense
1991 * code (asc) and additional sense code qualifier (ascq) with
1992 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
1993 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
1999 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
2001 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
2003 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
2004 cmd
->sense_buffer
[2] = sk
;
2005 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
2006 cmd
->sense_buffer
[12] = asc
;
2007 cmd
->sense_buffer
[13] = ascq
;
2011 * ata_scsi_badcmd - End a SCSI request with an error
2012 * @cmd: SCSI request to be handled
2013 * @done: SCSI command completion function
2014 * @asc: SCSI-defined additional sense code
2015 * @ascq: SCSI-defined additional sense code qualifier
2017 * Helper function that completes a SCSI command with
2018 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2019 * and the specified additional sense codes.
2022 * spin_lock_irqsave(host_set lock)
2025 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
2028 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
2033 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2035 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0))
2036 /* FIXME: not quite right; we don't want the
2037 * translation of taskfile registers into
2038 * a sense descriptors, since that's only
2039 * correct for ATA, not ATAPI
2041 ata_gen_ata_desc_sense(qc
);
2043 qc
->scsidone(qc
->scsicmd
);
2047 /* is it pointless to prefer PIO for "safety reasons"? */
2048 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2050 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2053 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2055 struct ata_port
*ap
= qc
->ap
;
2056 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2058 DPRINTK("ATAPI request sense\n");
2060 /* FIXME: is this needed? */
2061 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
2063 ap
->ops
->tf_read(ap
, &qc
->tf
);
2065 /* fill these in, for the case where they are -not- overwritten */
2066 cmd
->sense_buffer
[0] = 0x70;
2067 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2071 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
2072 qc
->dma_dir
= DMA_FROM_DEVICE
;
2074 memset(&qc
->cdb
, 0, ap
->cdb_len
);
2075 qc
->cdb
[0] = REQUEST_SENSE
;
2076 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2078 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2079 qc
->tf
.command
= ATA_CMD_PACKET
;
2081 if (ata_pio_use_silly(ap
)) {
2082 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2083 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2085 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2086 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2087 qc
->tf
.lbah
= (8 * 1024) >> 8;
2089 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2091 qc
->complete_fn
= atapi_sense_complete
;
2093 qc
->err_mask
= ata_qc_issue(qc
);
2095 ata_qc_complete(qc
);
2100 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2102 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2103 unsigned int err_mask
= qc
->err_mask
;
2105 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2107 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2108 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2109 atapi_request_sense(qc
);
2113 else if (unlikely(err_mask
))
2114 /* FIXME: not quite right; we don't want the
2115 * translation of taskfile registers into
2116 * a sense descriptors, since that's only
2117 * correct for ATA, not ATAPI
2119 ata_gen_ata_desc_sense(qc
);
2122 u8
*scsicmd
= cmd
->cmnd
;
2124 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2126 unsigned int buflen
;
2128 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2130 /* ATAPI devices typically report zero for their SCSI version,
2131 * and sometimes deviate from the spec WRT response data
2132 * format. If SCSI version is reported as zero like normal,
2133 * then we make the following fixups: 1) Fake MMC-5 version,
2134 * to indicate to the Linux scsi midlayer this is a modern
2135 * device. 2) Ensure response data format / ATAPI information
2136 * are always correct.
2143 ata_scsi_rbuf_put(cmd
, buf
);
2146 cmd
->result
= SAM_STAT_GOOD
;
2153 * atapi_xlat - Initialize PACKET taskfile
2154 * @qc: command structure to be initialized
2155 * @scsicmd: SCSI CDB associated with this PACKET command
2158 * spin_lock_irqsave(host_set lock)
2161 * Zero on success, non-zero on failure.
2164 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2166 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2167 struct ata_device
*dev
= qc
->dev
;
2168 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2169 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2172 /* Check whether ATAPI DMA is safe */
2173 if (ata_check_atapi_dma(qc
))
2176 memcpy(&qc
->cdb
, scsicmd
, qc
->ap
->cdb_len
);
2178 qc
->complete_fn
= atapi_qc_complete
;
2180 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2181 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2182 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2183 DPRINTK("direction: write\n");
2186 qc
->tf
.command
= ATA_CMD_PACKET
;
2188 /* no data, or PIO data xfer */
2189 if (using_pio
|| nodata
) {
2191 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2193 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2194 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2195 qc
->tf
.lbah
= (8 * 1024) >> 8;
2200 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2201 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2203 #ifdef ATAPI_ENABLE_DMADIR
2204 /* some SATA bridges need us to indicate data xfer direction */
2205 if (cmd
->sc_data_direction
!= DMA_TO_DEVICE
)
2206 qc
->tf
.feature
|= ATAPI_DMADIR
;
2210 qc
->nbytes
= cmd
->bufflen
;
2216 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2217 * @ap: ATA port to which the device is attached
2218 * @scsidev: SCSI device from which we derive the ATA device
2220 * Given various information provided in struct scsi_cmnd,
2221 * map that onto an ATA bus, and using that mapping
2222 * determine which ata_device is associated with the
2223 * SCSI command to be sent.
2226 * spin_lock_irqsave(host_set lock)
2229 * Associated ATA device, or %NULL if not found.
2232 static struct ata_device
*
2233 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2235 struct ata_device
*dev
;
2237 /* skip commands not addressed to targets we simulate */
2238 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
2239 dev
= &ap
->device
[scsidev
->id
];
2243 if (unlikely((scsidev
->channel
!= 0) ||
2244 (scsidev
->lun
!= 0)))
2247 if (unlikely(!ata_dev_present(dev
)))
2250 if (!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2251 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2252 printk(KERN_WARNING
"ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2253 ap
->id
, dev
->devno
, atapi_enabled
? "not supported with this driver" : "disabled");
2262 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2263 * @byte1: Byte 1 from pass-thru CDB.
2266 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2269 ata_scsi_map_proto(u8 byte1
)
2271 switch((byte1
& 0x1e) >> 1) {
2272 case 3: /* Non-data */
2273 return ATA_PROT_NODATA
;
2276 return ATA_PROT_DMA
;
2278 case 4: /* PIO Data-in */
2279 case 5: /* PIO Data-out */
2281 return ATA_PROT_PIO_MULT
;
2283 return ATA_PROT_PIO
;
2285 case 10: /* Device Reset */
2286 case 0: /* Hard Reset */
2288 case 2: /* Bus Idle */
2289 case 7: /* Packet */
2290 case 8: /* DMA Queued */
2291 case 9: /* Device Diagnostic */
2292 case 11: /* UDMA Data-in */
2293 case 12: /* UDMA Data-Out */
2294 case 13: /* FPDMA */
2295 default: /* Reserved */
2299 return ATA_PROT_UNKNOWN
;
2303 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2304 * @qc: command structure to be initialized
2305 * @scsicmd: SCSI command to convert
2307 * Handles either 12 or 16-byte versions of the CDB.
2310 * Zero on success, non-zero on failure.
2313 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2315 struct ata_taskfile
*tf
= &(qc
->tf
);
2316 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2318 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2322 * 12 and 16 byte CDBs use different offsets to
2323 * provide the various register values.
2325 if (scsicmd
[0] == ATA_16
) {
2327 * 16-byte CDB - may contain extended commands.
2329 * If that is the case, copy the upper byte register values.
2331 if (scsicmd
[1] & 0x01) {
2332 tf
->hob_feature
= scsicmd
[3];
2333 tf
->hob_nsect
= scsicmd
[5];
2334 tf
->hob_lbal
= scsicmd
[7];
2335 tf
->hob_lbam
= scsicmd
[9];
2336 tf
->hob_lbah
= scsicmd
[11];
2337 tf
->flags
|= ATA_TFLAG_LBA48
;
2339 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2342 * Always copy low byte, device and command registers.
2344 tf
->feature
= scsicmd
[4];
2345 tf
->nsect
= scsicmd
[6];
2346 tf
->lbal
= scsicmd
[8];
2347 tf
->lbam
= scsicmd
[10];
2348 tf
->lbah
= scsicmd
[12];
2349 tf
->device
= scsicmd
[13];
2350 tf
->command
= scsicmd
[14];
2353 * 12-byte CDB - incapable of extended commands.
2355 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2357 tf
->feature
= scsicmd
[3];
2358 tf
->nsect
= scsicmd
[4];
2359 tf
->lbal
= scsicmd
[5];
2360 tf
->lbam
= scsicmd
[6];
2361 tf
->lbah
= scsicmd
[7];
2362 tf
->device
= scsicmd
[8];
2363 tf
->command
= scsicmd
[9];
2366 * If slave is possible, enforce correct master/slave bit
2368 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2369 tf
->device
= qc
->dev
->devno
?
2370 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2373 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2374 * SET_FEATURES - XFER MODE must be preceded/succeeded
2375 * by an update to hardware-specific registers for each
2376 * controller (i.e. the reason for ->set_piomode(),
2377 * ->set_dmamode(), and ->post_set_mode() hooks).
2379 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2380 && (tf
->feature
== SETFEATURES_XFER
))
2384 * Set flags so that all registers will be written,
2385 * and pass on write indication (used for PIO/DMA
2388 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2390 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2391 tf
->flags
|= ATA_TFLAG_WRITE
;
2394 * Set transfer length.
2396 * TODO: find out if we need to do more here to
2397 * cover scatter/gather case.
2399 qc
->nsect
= cmd
->bufflen
/ ATA_SECT_SIZE
;
2404 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2405 /* "Invalid field in cdb" */
2410 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2412 * @cmd: SCSI command opcode to consider
2414 * Look up the SCSI command given, and determine whether the
2415 * SCSI command is to be translated or simulated.
2418 * Pointer to translation function if possible, %NULL if not.
2421 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2431 return ata_scsi_rw_xlat
;
2433 case SYNCHRONIZE_CACHE
:
2434 if (ata_try_flush_cache(dev
))
2435 return ata_scsi_flush_xlat
;
2440 return ata_scsi_verify_xlat
;
2444 return ata_scsi_pass_thru
;
2447 return ata_scsi_start_stop_xlat
;
2454 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2455 * @ap: ATA port to which the command was being sent
2456 * @cmd: SCSI command to dump
2458 * Prints the contents of a SCSI command via printk().
2461 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2462 struct scsi_cmnd
*cmd
)
2465 struct scsi_device
*scsidev
= cmd
->device
;
2466 u8
*scsicmd
= cmd
->cmnd
;
2468 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2470 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2471 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2472 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2478 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2479 * @cmd: SCSI command to be sent
2480 * @done: Completion function, called when command is complete
2482 * In some cases, this function translates SCSI commands into
2483 * ATA taskfiles, and queues the taskfiles to be sent to
2484 * hardware. In other cases, this function simulates a
2485 * SCSI device by evaluating and responding to certain
2486 * SCSI commands. This creates the overall effect of
2487 * ATA and ATAPI devices appearing as SCSI devices.
2490 * Releases scsi-layer-held lock, and obtains host_set lock.
2496 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2498 struct ata_port
*ap
;
2499 struct ata_device
*dev
;
2500 struct scsi_device
*scsidev
= cmd
->device
;
2501 struct Scsi_Host
*shost
= scsidev
->host
;
2503 ap
= (struct ata_port
*) &shost
->hostdata
[0];
2505 spin_unlock(shost
->host_lock
);
2506 spin_lock(&ap
->host_set
->lock
);
2508 ata_scsi_dump_cdb(ap
, cmd
);
2510 dev
= ata_scsi_find_dev(ap
, scsidev
);
2511 if (unlikely(!dev
)) {
2512 cmd
->result
= (DID_BAD_TARGET
<< 16);
2517 if (dev
->class == ATA_DEV_ATA
) {
2518 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2522 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
2524 ata_scsi_simulate(ap
, dev
, cmd
, done
);
2526 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
2529 spin_unlock(&ap
->host_set
->lock
);
2530 spin_lock(shost
->host_lock
);
2535 * ata_scsi_simulate - simulate SCSI command on ATA device
2536 * @id: current IDENTIFY data for target device.
2537 * @cmd: SCSI command being sent to device.
2538 * @done: SCSI command completion function.
2540 * Interprets and directly executes a select list of SCSI commands
2541 * that can be handled internally.
2544 * spin_lock_irqsave(host_set lock)
2547 void ata_scsi_simulate(struct ata_port
*ap
, struct ata_device
*dev
,
2548 struct scsi_cmnd
*cmd
,
2549 void (*done
)(struct scsi_cmnd
*))
2551 struct ata_scsi_args args
;
2552 const u8
*scsicmd
= cmd
->cmnd
;
2560 switch(scsicmd
[0]) {
2561 /* no-op's, complete with success */
2562 case SYNCHRONIZE_CACHE
:
2566 case TEST_UNIT_READY
:
2567 case FORMAT_UNIT
: /* FIXME: correct? */
2568 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2569 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2573 if (scsicmd
[1] & 2) /* is CmdDt set? */
2574 ata_scsi_invalid_field(cmd
, done
);
2575 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2576 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2577 else if (scsicmd
[2] == 0x00)
2578 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2579 else if (scsicmd
[2] == 0x80)
2580 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2581 else if (scsicmd
[2] == 0x83)
2582 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2584 ata_scsi_invalid_field(cmd
, done
);
2589 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2592 case MODE_SELECT
: /* unconditionally return */
2593 case MODE_SELECT_10
: /* bad-field-in-cdb */
2594 ata_scsi_invalid_field(cmd
, done
);
2598 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2601 case SERVICE_ACTION_IN
:
2602 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2603 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2605 ata_scsi_invalid_field(cmd
, done
);
2609 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2612 /* mandatory commands we haven't implemented yet */
2615 /* all other commands */
2617 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2618 /* "Invalid command operation code" */
2624 void ata_scsi_scan_host(struct ata_port
*ap
)
2626 struct ata_device
*dev
;
2629 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
2632 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2633 dev
= &ap
->device
[i
];
2635 if (ata_dev_present(dev
))
2636 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);