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 <scsi/scsi_transport.h>
45 #include <linux/libata.h>
46 #include <linux/hdreg.h>
47 #include <asm/uaccess.h>
51 #define SECTOR_SIZE 512
53 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
, const u8
*scsicmd
);
54 static struct ata_device
*
55 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
);
57 #define RW_RECOVERY_MPAGE 0x1
58 #define RW_RECOVERY_MPAGE_LEN 12
59 #define CACHE_MPAGE 0x8
60 #define CACHE_MPAGE_LEN 20
61 #define CONTROL_MPAGE 0xa
62 #define CONTROL_MPAGE_LEN 12
63 #define ALL_MPAGES 0x3f
64 #define ALL_SUB_MPAGES 0xff
67 static const u8 def_rw_recovery_mpage
[] = {
69 RW_RECOVERY_MPAGE_LEN
- 2,
70 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
71 (1 << 6), /* ARRE (auto read reallocation) */
72 0, /* read retry count */
74 0, /* write retry count */
78 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
81 0, /* contains WCE, needs to be 0 for logic */
82 0, 0, 0, 0, 0, 0, 0, 0, 0,
83 0, /* contains DRA, needs to be 0 for logic */
87 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
89 CONTROL_MPAGE_LEN
- 2,
90 2, /* DSENSE=0, GLTSD=1 */
91 0, /* [QAM+QERR may be 1, see 05-359r1] */
92 0, 0, 0, 0, 0xff, 0xff,
93 0, 30 /* extended self test time, see 05-359r1 */
97 * libata transport template. libata doesn't do real transport stuff.
98 * It just needs the eh_timed_out hook.
100 struct scsi_transport_template ata_scsi_transport_template
= {
101 .eh_timed_out
= ata_scsi_timed_out
,
105 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
106 void (*done
)(struct scsi_cmnd
*))
108 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
109 /* "Invalid field in cbd" */
114 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
115 * @sdev: SCSI device for which BIOS geometry is to be determined
116 * @bdev: block device associated with @sdev
117 * @capacity: capacity of SCSI device
118 * @geom: location to which geometry will be output
120 * Generic bios head/sector/cylinder calculator
121 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
122 * mapping. Some situations may arise where the disk is not
123 * bootable if this is not used.
126 * Defined by the SCSI layer. We don't really care.
131 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
132 sector_t capacity
, int geom
[])
136 sector_div(capacity
, 255*63);
143 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
144 * @scsidev: Device to which we are issuing command
145 * @arg: User provided data for issuing command
148 * Defined by the SCSI layer. We don't really care.
151 * Zero on success, negative errno on error.
154 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
157 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
158 u8 args
[4], *argbuf
= NULL
;
160 struct scsi_sense_hdr sshdr
;
161 enum dma_data_direction data_dir
;
166 if (copy_from_user(args
, arg
, sizeof(args
)))
169 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
172 argsize
= SECTOR_SIZE
* args
[3];
173 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
174 if (argbuf
== NULL
) {
179 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
180 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
181 block count in sector count field */
182 data_dir
= DMA_FROM_DEVICE
;
184 scsi_cmd
[1] = (3 << 1); /* Non-data */
185 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
189 scsi_cmd
[0] = ATA_16
;
191 scsi_cmd
[4] = args
[2];
192 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
193 scsi_cmd
[6] = args
[3];
194 scsi_cmd
[8] = args
[1];
198 scsi_cmd
[6] = args
[1];
200 scsi_cmd
[14] = args
[0];
202 /* Good values for timeout and retries? Values below
203 from scsi_ioctl_send_command() for default case... */
204 if (scsi_execute_req(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
205 &sshdr
, (10*HZ
), 5)) {
210 /* Need code to retrieve data from check condition? */
213 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
223 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
224 * @scsidev: Device to which we are issuing command
225 * @arg: User provided data for issuing command
228 * Defined by the SCSI layer. We don't really care.
231 * Zero on success, negative errno on error.
233 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
236 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
238 struct scsi_sense_hdr sshdr
;
243 if (copy_from_user(args
, arg
, sizeof(args
)))
246 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
247 scsi_cmd
[0] = ATA_16
;
248 scsi_cmd
[1] = (3 << 1); /* Non-data */
249 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
250 scsi_cmd
[4] = args
[1];
251 scsi_cmd
[6] = args
[2];
252 scsi_cmd
[8] = args
[3];
253 scsi_cmd
[10] = args
[4];
254 scsi_cmd
[12] = args
[5];
255 scsi_cmd
[14] = args
[0];
257 /* Good values for timeout and retries? Values below
258 from scsi_ioctl_send_command() for default case... */
259 if (scsi_execute_req(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0, &sshdr
,
263 /* Need code to retrieve data from check condition? */
267 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
269 int val
= -EINVAL
, rc
= -EINVAL
;
272 case ATA_IOC_GET_IO32
:
274 if (copy_to_user(arg
, &val
, 1))
278 case ATA_IOC_SET_IO32
:
279 val
= (unsigned long) arg
;
285 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
287 return ata_cmd_ioctl(scsidev
, arg
);
289 case HDIO_DRIVE_TASK
:
290 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
292 return ata_task_ioctl(scsidev
, arg
);
303 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
304 * @ap: ATA port to which the new command is attached
305 * @dev: ATA device to which the new command is attached
306 * @cmd: SCSI command that originated this ATA command
307 * @done: SCSI command completion function
309 * Obtain a reference to an unused ata_queued_cmd structure,
310 * which is the basic libata structure representing a single
311 * ATA command sent to the hardware.
313 * If a command was available, fill in the SCSI-specific
314 * portions of the structure with information on the
318 * spin_lock_irqsave(host_set lock)
321 * Command allocated, or %NULL if none available.
323 struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_port
*ap
,
324 struct ata_device
*dev
,
325 struct scsi_cmnd
*cmd
,
326 void (*done
)(struct scsi_cmnd
*))
328 struct ata_queued_cmd
*qc
;
330 qc
= ata_qc_new_init(ap
, dev
);
336 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
337 qc
->n_elem
= cmd
->use_sg
;
339 qc
->__sg
= &qc
->sgent
;
343 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
351 * ata_dump_status - user friendly display of error info
352 * @id: id of the port in question
353 * @tf: ptr to filled out taskfile
355 * Decode and dump the ATA error/status registers for the user so
356 * that they have some idea what really happened at the non
357 * make-believe layer.
360 * inherited from caller
362 void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
364 u8 stat
= tf
->command
, err
= tf
->feature
;
366 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
367 if (stat
& ATA_BUSY
) {
368 printk("Busy }\n"); /* Data is not valid in this case */
370 if (stat
& 0x40) printk("DriveReady ");
371 if (stat
& 0x20) printk("DeviceFault ");
372 if (stat
& 0x10) printk("SeekComplete ");
373 if (stat
& 0x08) printk("DataRequest ");
374 if (stat
& 0x04) printk("CorrectedError ");
375 if (stat
& 0x02) printk("Index ");
376 if (stat
& 0x01) printk("Error ");
380 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
381 if (err
& 0x04) printk("DriveStatusError ");
383 if (err
& 0x04) printk("BadCRC ");
384 else printk("Sector ");
386 if (err
& 0x40) printk("UncorrectableError ");
387 if (err
& 0x10) printk("SectorIdNotFound ");
388 if (err
& 0x02) printk("TrackZeroNotFound ");
389 if (err
& 0x01) printk("AddrMarkNotFound ");
395 int ata_scsi_device_resume(struct scsi_device
*sdev
)
397 struct ata_port
*ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
398 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
400 return ata_device_resume(ap
, dev
);
403 int ata_scsi_device_suspend(struct scsi_device
*sdev
, pm_message_t state
)
405 struct ata_port
*ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
406 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
408 return ata_device_suspend(ap
, dev
, state
);
412 * ata_to_sense_error - convert ATA error to SCSI error
413 * @id: ATA device number
414 * @drv_stat: value contained in ATA status register
415 * @drv_err: value contained in ATA error register
416 * @sk: the sense key we'll fill out
417 * @asc: the additional sense code we'll fill out
418 * @ascq: the additional sense code qualifier we'll fill out
420 * Converts an ATA error into a SCSI error. Fill out pointers to
421 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
422 * format sense blocks.
425 * spin_lock_irqsave(host_set lock)
427 void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
, u8
*asc
,
432 /* Based on the 3ware driver translation table */
433 static const unsigned char sense_table
[][4] = {
435 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
437 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
439 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
440 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
441 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
442 /* MC|ID|ABRT|TRK0|MARK */
443 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
445 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
446 /* Bad address mark */
447 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
449 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
451 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
452 /* Media change request */
453 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
455 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
457 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
459 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
460 /* BBD - block marked bad */
461 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
462 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
464 static const unsigned char stat_table
[][4] = {
465 /* Must be first because BUSY means no other bits valid */
466 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
467 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
468 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
469 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
470 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
474 * Is this an error we can process/parse
476 if (drv_stat
& ATA_BUSY
) {
477 drv_err
= 0; /* Ignore the err bits, they're invalid */
481 /* Look for drv_err */
482 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
483 /* Look for best matches first */
484 if ((sense_table
[i
][0] & drv_err
) ==
486 *sk
= sense_table
[i
][1];
487 *asc
= sense_table
[i
][2];
488 *ascq
= sense_table
[i
][3];
492 /* No immediate match */
493 printk(KERN_WARNING
"ata%u: no sense translation for "
494 "error 0x%02x\n", id
, drv_err
);
497 /* Fall back to interpreting status bits */
498 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
499 if (stat_table
[i
][0] & drv_stat
) {
500 *sk
= stat_table
[i
][1];
501 *asc
= stat_table
[i
][2];
502 *ascq
= stat_table
[i
][3];
506 /* No error? Undecoded? */
507 printk(KERN_WARNING
"ata%u: no sense translation for status: 0x%02x\n",
510 /* We need a sensible error return here, which is tricky, and one
511 that won't cause people to do things like return a disk wrongly */
512 *sk
= ABORTED_COMMAND
;
517 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x to "
518 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id
, drv_stat
, drv_err
,
524 * ata_gen_ata_desc_sense - Generate check condition sense block.
525 * @qc: Command that completed.
527 * This function is specific to the ATA descriptor format sense
528 * block specified for the ATA pass through commands. Regardless
529 * of whether the command errored or not, return a sense
530 * block. Copy all controller registers into the sense
531 * block. Clear sense key, ASC & ASCQ if there is no error.
534 * spin_lock_irqsave(host_set lock)
536 void ata_gen_ata_desc_sense(struct ata_queued_cmd
*qc
)
538 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
539 struct ata_taskfile
*tf
= &qc
->tf
;
540 unsigned char *sb
= cmd
->sense_buffer
;
541 unsigned char *desc
= sb
+ 8;
543 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
545 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
548 * Use ata_to_sense_error() to map status register bits
549 * onto sense key, asc & ascq.
552 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
553 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
554 &sb
[1], &sb
[2], &sb
[3]);
559 * Sense data is current and format is descriptor.
566 * Set length of additional sense data.
567 * Since we only populate descriptor 0, the total
568 * length is the same (fixed) length as descriptor 0.
570 desc
[1] = sb
[7] = 14;
573 * Copy registers into sense buffer.
576 desc
[3] = tf
->feature
; /* == error reg */
581 desc
[12] = tf
->device
;
582 desc
[13] = tf
->command
; /* == status reg */
585 * Fill in Extend bit, and the high order bytes
588 if (tf
->flags
& ATA_TFLAG_LBA48
) {
590 desc
[4] = tf
->hob_nsect
;
591 desc
[6] = tf
->hob_lbal
;
592 desc
[8] = tf
->hob_lbam
;
593 desc
[10] = tf
->hob_lbah
;
598 * ata_gen_fixed_sense - generate a SCSI fixed sense block
599 * @qc: Command that we are erroring out
601 * Leverage ata_to_sense_error() to give us the codes. Fit our
602 * LBA in here if there's room.
605 * inherited from caller
607 void ata_gen_fixed_sense(struct ata_queued_cmd
*qc
)
609 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
610 struct ata_taskfile
*tf
= &qc
->tf
;
611 unsigned char *sb
= cmd
->sense_buffer
;
613 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
615 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
618 * Use ata_to_sense_error() to map status register bits
619 * onto sense key, asc & ascq.
622 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;
649 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
651 sdev
->use_10_for_rw
= 1;
652 sdev
->use_10_for_ms
= 1;
655 static void ata_scsi_dev_config(struct scsi_device
*sdev
,
656 struct ata_device
*dev
)
658 unsigned int max_sectors
;
660 /* TODO: 2048 is an arbitrary number, not the
661 * hardware maximum. This should be increased to
662 * 65534 when Jens Axboe's patch for dynamically
663 * determining max_sectors is merged.
665 max_sectors
= ATA_MAX_SECTORS
;
666 if (dev
->flags
& ATA_DFLAG_LBA48
)
668 if (dev
->max_sectors
)
669 max_sectors
= dev
->max_sectors
;
671 blk_queue_max_sectors(sdev
->request_queue
, max_sectors
);
674 * SATA DMA transfers must be multiples of 4 byte, so
675 * we need to pad ATAPI transfers using an extra sg.
676 * Decrement max hw segments accordingly.
678 if (dev
->class == ATA_DEV_ATAPI
) {
679 request_queue_t
*q
= sdev
->request_queue
;
680 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
685 * ata_scsi_slave_config - Set SCSI device attributes
686 * @sdev: SCSI device to examine
688 * This is called before we actually start reading
689 * and writing to the device, to configure certain
690 * SCSI mid-layer behaviors.
693 * Defined by SCSI layer. We don't really care.
696 int ata_scsi_slave_config(struct scsi_device
*sdev
)
698 ata_scsi_sdev_config(sdev
);
700 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
702 if (sdev
->id
< ATA_MAX_DEVICES
) {
704 struct ata_device
*dev
;
706 ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
707 dev
= &ap
->device
[sdev
->id
];
709 ata_scsi_dev_config(sdev
, dev
);
712 return 0; /* scsi layer doesn't check return value, sigh */
716 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
717 * @qc: Storage for translated ATA taskfile
718 * @scsicmd: SCSI command to translate
720 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
721 * (to start). Perhaps these commands should be preceded by
722 * CHECK POWER MODE to see what power mode the device is already in.
723 * [See SAT revision 5 at www.t10.org]
726 * spin_lock_irqsave(host_set lock)
729 * Zero on success, non-zero on error.
732 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
735 struct ata_taskfile
*tf
= &qc
->tf
;
737 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
738 tf
->protocol
= ATA_PROT_NODATA
;
739 if (scsicmd
[1] & 0x1) {
740 ; /* ignore IMMED bit, violates sat-r05 */
742 if (scsicmd
[4] & 0x2)
743 goto invalid_fld
; /* LOEJ bit set not supported */
744 if (((scsicmd
[4] >> 4) & 0xf) != 0)
745 goto invalid_fld
; /* power conditions not supported */
746 if (scsicmd
[4] & 0x1) {
747 tf
->nsect
= 1; /* 1 sector, lba=0 */
749 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
750 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
755 tf
->device
|= ATA_LBA
;
758 tf
->lbal
= 0x1; /* sect */
759 tf
->lbam
= 0x0; /* cyl low */
760 tf
->lbah
= 0x0; /* cyl high */
763 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
765 tf
->nsect
= 0; /* time period value (0 implies now) */
766 tf
->command
= ATA_CMD_STANDBY
;
767 /* Consider: ATA STANDBY IMMEDIATE command */
770 * Standby and Idle condition timers could be implemented but that
771 * would require libata to implement the Power condition mode page
772 * and allow the user to change it. Changing mode pages requires
773 * MODE SELECT to be implemented.
779 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
780 /* "Invalid field in cbd" */
786 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
787 * @qc: Storage for translated ATA taskfile
788 * @scsicmd: SCSI command to translate (ignored)
790 * Sets up an ATA taskfile to issue FLUSH CACHE or
794 * spin_lock_irqsave(host_set lock)
797 * Zero on success, non-zero on error.
800 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
802 struct ata_taskfile
*tf
= &qc
->tf
;
804 tf
->flags
|= ATA_TFLAG_DEVICE
;
805 tf
->protocol
= ATA_PROT_NODATA
;
807 if ((qc
->dev
->flags
& ATA_DFLAG_LBA48
) &&
808 (ata_id_has_flush_ext(qc
->dev
->id
)))
809 tf
->command
= ATA_CMD_FLUSH_EXT
;
811 tf
->command
= ATA_CMD_FLUSH
;
817 * scsi_6_lba_len - Get LBA and transfer length
818 * @scsicmd: SCSI command to translate
820 * Calculate LBA and transfer length for 6-byte commands.
824 * @plen: the transfer length
827 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
832 VPRINTK("six-byte command\n");
834 lba
|= ((u64
)scsicmd
[2]) << 8;
835 lba
|= ((u64
)scsicmd
[3]);
837 len
|= ((u32
)scsicmd
[4]);
844 * scsi_10_lba_len - Get LBA and transfer length
845 * @scsicmd: SCSI command to translate
847 * Calculate LBA and transfer length for 10-byte commands.
851 * @plen: the transfer length
854 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
859 VPRINTK("ten-byte command\n");
861 lba
|= ((u64
)scsicmd
[2]) << 24;
862 lba
|= ((u64
)scsicmd
[3]) << 16;
863 lba
|= ((u64
)scsicmd
[4]) << 8;
864 lba
|= ((u64
)scsicmd
[5]);
866 len
|= ((u32
)scsicmd
[7]) << 8;
867 len
|= ((u32
)scsicmd
[8]);
874 * scsi_16_lba_len - Get LBA and transfer length
875 * @scsicmd: SCSI command to translate
877 * Calculate LBA and transfer length for 16-byte commands.
881 * @plen: the transfer length
884 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
889 VPRINTK("sixteen-byte command\n");
891 lba
|= ((u64
)scsicmd
[2]) << 56;
892 lba
|= ((u64
)scsicmd
[3]) << 48;
893 lba
|= ((u64
)scsicmd
[4]) << 40;
894 lba
|= ((u64
)scsicmd
[5]) << 32;
895 lba
|= ((u64
)scsicmd
[6]) << 24;
896 lba
|= ((u64
)scsicmd
[7]) << 16;
897 lba
|= ((u64
)scsicmd
[8]) << 8;
898 lba
|= ((u64
)scsicmd
[9]);
900 len
|= ((u32
)scsicmd
[10]) << 24;
901 len
|= ((u32
)scsicmd
[11]) << 16;
902 len
|= ((u32
)scsicmd
[12]) << 8;
903 len
|= ((u32
)scsicmd
[13]);
910 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
911 * @qc: Storage for translated ATA taskfile
912 * @scsicmd: SCSI command to translate
914 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
917 * spin_lock_irqsave(host_set lock)
920 * Zero on success, non-zero on error.
923 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
925 struct ata_taskfile
*tf
= &qc
->tf
;
926 struct ata_device
*dev
= qc
->dev
;
927 u64 dev_sectors
= qc
->dev
->n_sectors
;
931 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
932 tf
->protocol
= ATA_PROT_NODATA
;
934 if (scsicmd
[0] == VERIFY
)
935 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
936 else if (scsicmd
[0] == VERIFY_16
)
937 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
943 if (block
>= dev_sectors
)
945 if ((block
+ n_block
) > dev_sectors
)
948 if (dev
->flags
& ATA_DFLAG_LBA
) {
949 tf
->flags
|= ATA_TFLAG_LBA
;
951 if (lba_28_ok(block
, n_block
)) {
953 tf
->command
= ATA_CMD_VERIFY
;
954 tf
->device
|= (block
>> 24) & 0xf;
955 } else if (lba_48_ok(block
, n_block
)) {
956 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
960 tf
->flags
|= ATA_TFLAG_LBA48
;
961 tf
->command
= ATA_CMD_VERIFY_EXT
;
963 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
965 tf
->hob_lbah
= (block
>> 40) & 0xff;
966 tf
->hob_lbam
= (block
>> 32) & 0xff;
967 tf
->hob_lbal
= (block
>> 24) & 0xff;
969 /* request too large even for LBA48 */
972 tf
->nsect
= n_block
& 0xff;
974 tf
->lbah
= (block
>> 16) & 0xff;
975 tf
->lbam
= (block
>> 8) & 0xff;
976 tf
->lbal
= block
& 0xff;
978 tf
->device
|= ATA_LBA
;
981 u32 sect
, head
, cyl
, track
;
983 if (!lba_28_ok(block
, n_block
))
986 /* Convert LBA to CHS */
987 track
= (u32
)block
/ dev
->sectors
;
988 cyl
= track
/ dev
->heads
;
989 head
= track
% dev
->heads
;
990 sect
= (u32
)block
% dev
->sectors
+ 1;
992 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
993 (u32
)block
, track
, cyl
, head
, sect
);
995 /* Check whether the converted CHS can fit.
999 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1002 tf
->command
= ATA_CMD_VERIFY
;
1003 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1006 tf
->lbah
= cyl
>> 8;
1013 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1014 /* "Invalid field in cbd" */
1018 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1019 /* "Logical Block Address out of range" */
1023 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1028 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1029 * @qc: Storage for translated ATA taskfile
1030 * @scsicmd: SCSI command to translate
1032 * Converts any of six SCSI read/write commands into the
1033 * ATA counterpart, including starting sector (LBA),
1034 * sector count, and taking into account the device's LBA48
1037 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1038 * %WRITE_16 are currently supported.
1041 * spin_lock_irqsave(host_set lock)
1044 * Zero on success, non-zero on error.
1047 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1049 struct ata_taskfile
*tf
= &qc
->tf
;
1050 struct ata_device
*dev
= qc
->dev
;
1054 qc
->flags
|= ATA_QCFLAG_IO
;
1055 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1057 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1058 scsicmd
[0] == WRITE_16
)
1059 tf
->flags
|= ATA_TFLAG_WRITE
;
1061 /* Calculate the SCSI LBA, transfer length and FUA. */
1062 switch (scsicmd
[0]) {
1065 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1066 if (unlikely(scsicmd
[1] & (1 << 3)))
1067 tf
->flags
|= ATA_TFLAG_FUA
;
1071 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1073 /* for 6-byte r/w commands, transfer length 0
1074 * means 256 blocks of data, not 0 block.
1081 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1082 if (unlikely(scsicmd
[1] & (1 << 3)))
1083 tf
->flags
|= ATA_TFLAG_FUA
;
1086 DPRINTK("no-byte command\n");
1090 /* Check and compose ATA command */
1092 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1093 * length 0 means transfer 0 block of data.
1094 * However, for ATA R/W commands, sector count 0 means
1095 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1097 * WARNING: one or two older ATA drives treat 0 as 0...
1101 if (dev
->flags
& ATA_DFLAG_LBA
) {
1102 tf
->flags
|= ATA_TFLAG_LBA
;
1104 if (lba_28_ok(block
, n_block
)) {
1106 tf
->device
|= (block
>> 24) & 0xf;
1107 } else if (lba_48_ok(block
, n_block
)) {
1108 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1112 tf
->flags
|= ATA_TFLAG_LBA48
;
1114 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1116 tf
->hob_lbah
= (block
>> 40) & 0xff;
1117 tf
->hob_lbam
= (block
>> 32) & 0xff;
1118 tf
->hob_lbal
= (block
>> 24) & 0xff;
1120 /* request too large even for LBA48 */
1123 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1126 qc
->nsect
= n_block
;
1127 tf
->nsect
= n_block
& 0xff;
1129 tf
->lbah
= (block
>> 16) & 0xff;
1130 tf
->lbam
= (block
>> 8) & 0xff;
1131 tf
->lbal
= block
& 0xff;
1133 tf
->device
|= ATA_LBA
;
1136 u32 sect
, head
, cyl
, track
;
1138 /* The request -may- be too large for CHS addressing. */
1139 if (!lba_28_ok(block
, n_block
))
1142 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1145 /* Convert LBA to CHS */
1146 track
= (u32
)block
/ dev
->sectors
;
1147 cyl
= track
/ dev
->heads
;
1148 head
= track
% dev
->heads
;
1149 sect
= (u32
)block
% dev
->sectors
+ 1;
1151 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1152 (u32
)block
, track
, cyl
, head
, sect
);
1154 /* Check whether the converted CHS can fit.
1158 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1161 qc
->nsect
= n_block
;
1162 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1165 tf
->lbah
= cyl
>> 8;
1172 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1173 /* "Invalid field in cbd" */
1177 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1178 /* "Logical Block Address out of range" */
1182 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1186 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1188 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1189 u8
*cdb
= cmd
->cmnd
;
1190 int need_sense
= (qc
->err_mask
!= 0);
1192 /* For ATA pass thru (SAT) commands, generate a sense block if
1193 * user mandated it or if there's an error. Note that if we
1194 * generate because the user forced us to, a check condition
1195 * is generated and the ATA register values are returned
1196 * whether the command completed successfully or not. If there
1197 * was no error, SK, ASC and ASCQ will all be zero.
1199 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1200 ((cdb
[2] & 0x20) || need_sense
)) {
1201 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
1202 ata_gen_ata_desc_sense(qc
);
1205 cmd
->result
= SAM_STAT_GOOD
;
1207 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
1209 /* TODO: decide which descriptor format to use
1210 * for 48b LBA devices and call that here
1211 * instead of the fixed desc, which is only
1212 * good for smaller LBA (and maybe CHS?)
1215 ata_gen_fixed_sense(qc
);
1220 /* The ata_gen_..._sense routines fill in tf */
1221 ata_dump_status(qc
->ap
->id
, &qc
->tf
);
1230 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1231 * @ap: ATA port to which the command is addressed
1232 * @dev: ATA device to which the command is addressed
1233 * @cmd: SCSI command to execute
1234 * @done: SCSI command completion function
1235 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1237 * Our ->queuecommand() function has decided that the SCSI
1238 * command issued can be directly translated into an ATA
1239 * command, rather than handled internally.
1241 * This function sets up an ata_queued_cmd structure for the
1242 * SCSI command, and sends that ata_queued_cmd to the hardware.
1244 * The xlat_func argument (actor) returns 0 if ready to execute
1245 * ATA command, else 1 to finish translation. If 1 is returned
1246 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1247 * to be set reflecting an error condition or clean (early)
1251 * spin_lock_irqsave(host_set lock)
1254 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
1255 struct scsi_cmnd
*cmd
,
1256 void (*done
)(struct scsi_cmnd
*),
1257 ata_xlat_func_t xlat_func
)
1259 struct ata_queued_cmd
*qc
;
1260 u8
*scsicmd
= cmd
->cmnd
;
1264 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
1268 /* data is present; dma-map it */
1269 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1270 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1271 if (unlikely(cmd
->request_bufflen
< 1)) {
1272 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
1273 ap
->id
, dev
->devno
);
1278 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1280 ata_sg_init_one(qc
, cmd
->request_buffer
,
1281 cmd
->request_bufflen
);
1283 qc
->dma_dir
= cmd
->sc_data_direction
;
1286 qc
->complete_fn
= ata_scsi_qc_complete
;
1288 if (xlat_func(qc
, scsicmd
))
1291 /* select device, send command to hardware */
1300 DPRINTK("EXIT - early finish (good or error)\n");
1306 cmd
->result
= (DID_ERROR
<< 16);
1308 DPRINTK("EXIT - internal\n");
1313 * ata_scsi_rbuf_get - Map response buffer.
1314 * @cmd: SCSI command containing buffer to be mapped.
1315 * @buf_out: Pointer to mapped area.
1317 * Maps buffer contained within SCSI command @cmd.
1320 * spin_lock_irqsave(host_set lock)
1323 * Length of response buffer.
1326 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1329 unsigned int buflen
;
1332 struct scatterlist
*sg
;
1334 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1335 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1336 buflen
= sg
->length
;
1338 buf
= cmd
->request_buffer
;
1339 buflen
= cmd
->request_bufflen
;
1347 * ata_scsi_rbuf_put - Unmap response buffer.
1348 * @cmd: SCSI command containing buffer to be unmapped.
1349 * @buf: buffer to unmap
1351 * Unmaps response buffer contained within @cmd.
1354 * spin_lock_irqsave(host_set lock)
1357 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1360 struct scatterlist
*sg
;
1362 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1363 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1368 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1369 * @args: device IDENTIFY data / SCSI command of interest.
1370 * @actor: Callback hook for desired SCSI command simulator
1372 * Takes care of the hard work of simulating a SCSI command...
1373 * Mapping the response buffer, calling the command's handler,
1374 * and handling the handler's return value. This return value
1375 * indicates whether the handler wishes the SCSI command to be
1376 * completed successfully (0), or not (in which case cmd->result
1377 * and sense buffer are assumed to be set).
1380 * spin_lock_irqsave(host_set lock)
1383 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1384 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1385 u8
*rbuf
, unsigned int buflen
))
1388 unsigned int buflen
, rc
;
1389 struct scsi_cmnd
*cmd
= args
->cmd
;
1391 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1392 memset(rbuf
, 0, buflen
);
1393 rc
= actor(args
, rbuf
, buflen
);
1394 ata_scsi_rbuf_put(cmd
, rbuf
);
1397 cmd
->result
= SAM_STAT_GOOD
;
1402 * ata_scsiop_inq_std - Simulate INQUIRY command
1403 * @args: device IDENTIFY data / SCSI command of interest.
1404 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1405 * @buflen: Response buffer length.
1407 * Returns standard device identification data associated
1408 * with non-VPD INQUIRY command output.
1411 * spin_lock_irqsave(host_set lock)
1414 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1415 unsigned int buflen
)
1420 0x5, /* claim SPC-3 version compatibility */
1425 /* set scsi removeable (RMB) bit per ata bit */
1426 if (ata_id_removeable(args
->id
))
1431 memcpy(rbuf
, hdr
, sizeof(hdr
));
1434 memcpy(&rbuf
[8], "ATA ", 8);
1435 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1436 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1437 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1438 memcpy(&rbuf
[32], "n/a ", 4);
1442 const u8 versions
[] = {
1443 0x60, /* SAM-3 (no version claimed) */
1446 0x20, /* SBC-2 (no version claimed) */
1449 0x60 /* SPC-3 (no version claimed) */
1452 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1459 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1460 * @args: device IDENTIFY data / SCSI command of interest.
1461 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1462 * @buflen: Response buffer length.
1464 * Returns list of inquiry VPD pages available.
1467 * spin_lock_irqsave(host_set lock)
1470 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1471 unsigned int buflen
)
1473 const u8 pages
[] = {
1474 0x00, /* page 0x00, this page */
1475 0x80, /* page 0x80, unit serial no page */
1476 0x83 /* page 0x83, device ident page */
1478 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1481 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1487 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1488 * @args: device IDENTIFY data / SCSI command of interest.
1489 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1490 * @buflen: Response buffer length.
1492 * Returns ATA device serial number.
1495 * spin_lock_irqsave(host_set lock)
1498 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1499 unsigned int buflen
)
1503 0x80, /* this page code */
1505 ATA_SERNO_LEN
, /* page len */
1507 memcpy(rbuf
, hdr
, sizeof(hdr
));
1509 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1510 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1511 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1517 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1518 * @args: device IDENTIFY data / SCSI command of interest.
1519 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1520 * @buflen: Response buffer length.
1522 * Yields two logical unit device identification designators:
1523 * - vendor specific ASCII containing the ATA serial number
1524 * - SAT defined "t10 vendor id based" containing ASCII vendor
1525 * name ("ATA "), model and serial numbers.
1528 * spin_lock_irqsave(host_set lock)
1531 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1532 unsigned int buflen
)
1535 const int sat_model_serial_desc_len
= 68;
1536 const int ata_model_byte_len
= 40;
1538 rbuf
[1] = 0x83; /* this page code */
1541 if (buflen
> (ATA_SERNO_LEN
+ num
+ 3)) {
1542 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1544 rbuf
[num
+ 3] = ATA_SERNO_LEN
;
1546 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1547 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1548 num
+= ATA_SERNO_LEN
;
1550 if (buflen
> (sat_model_serial_desc_len
+ num
+ 3)) {
1551 /* SAT defined lu model and serial numbers descriptor */
1552 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1555 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
1557 memcpy(rbuf
+ num
, "ATA ", 8);
1559 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1560 ATA_ID_PROD_OFS
, ata_model_byte_len
);
1561 num
+= ata_model_byte_len
;
1562 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1563 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1564 num
+= ATA_SERNO_LEN
;
1566 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
1571 * ata_scsiop_noop - Command handler that simply returns success.
1572 * @args: device IDENTIFY data / SCSI command of interest.
1573 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1574 * @buflen: Response buffer length.
1576 * No operation. Simply returns success to caller, to indicate
1577 * that the caller should successfully complete this SCSI command.
1580 * spin_lock_irqsave(host_set lock)
1583 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1584 unsigned int buflen
)
1591 * ata_msense_push - Push data onto MODE SENSE data output buffer
1592 * @ptr_io: (input/output) Location to store more output data
1593 * @last: End of output data buffer
1594 * @buf: Pointer to BLOB being added to output buffer
1595 * @buflen: Length of BLOB
1597 * Store MODE SENSE data on an output buffer.
1603 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1604 const u8
*buf
, unsigned int buflen
)
1608 if ((ptr
+ buflen
- 1) > last
)
1611 memcpy(ptr
, buf
, buflen
);
1619 * ata_msense_caching - Simulate MODE SENSE caching info page
1620 * @id: device IDENTIFY data
1621 * @ptr_io: (input/output) Location to store more output data
1622 * @last: End of output data buffer
1624 * Generate a caching info page, which conditionally indicates
1625 * write caching to the SCSI layer, depending on device
1632 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1635 u8 page
[CACHE_MPAGE_LEN
];
1637 memcpy(page
, def_cache_mpage
, sizeof(page
));
1638 if (ata_id_wcache_enabled(id
))
1639 page
[2] |= (1 << 2); /* write cache enable */
1640 if (!ata_id_rahead_enabled(id
))
1641 page
[12] |= (1 << 5); /* disable read ahead */
1643 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1644 return sizeof(page
);
1648 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1649 * @dev: Device associated with this MODE SENSE command
1650 * @ptr_io: (input/output) Location to store more output data
1651 * @last: End of output data buffer
1653 * Generate a generic MODE SENSE control mode page.
1659 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1661 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1662 sizeof(def_control_mpage
));
1663 return sizeof(def_control_mpage
);
1667 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1668 * @dev: Device associated with this MODE SENSE command
1669 * @ptr_io: (input/output) Location to store more output data
1670 * @last: End of output data buffer
1672 * Generate a generic MODE SENSE r/w error recovery page.
1678 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1681 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1682 sizeof(def_rw_recovery_mpage
));
1683 return sizeof(def_rw_recovery_mpage
);
1687 * We can turn this into a real blacklist if it's needed, for now just
1688 * blacklist any Maxtor BANC1G10 revision firmware
1690 static int ata_dev_supports_fua(u16
*id
)
1692 unsigned char model
[41], fw
[9];
1696 if (!ata_id_has_fua(id
))
1699 ata_id_c_string(id
, model
, ATA_ID_PROD_OFS
, sizeof(model
));
1700 ata_id_c_string(id
, fw
, ATA_ID_FW_REV_OFS
, sizeof(fw
));
1702 if (strcmp(model
, "Maxtor"))
1704 if (strcmp(fw
, "BANC1G10"))
1707 return 0; /* blacklisted */
1711 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1712 * @args: device IDENTIFY data / SCSI command of interest.
1713 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1714 * @buflen: Response buffer length.
1716 * Simulate MODE SENSE commands. Assume this is invoked for direct
1717 * access devices (e.g. disks) only. There should be no block
1718 * descriptor for other device types.
1721 * spin_lock_irqsave(host_set lock)
1724 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1725 unsigned int buflen
)
1727 struct ata_device
*dev
= args
->dev
;
1728 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1729 const u8 sat_blk_desc
[] = {
1730 0, 0, 0, 0, /* number of blocks: sat unspecified */
1732 0, 0x2, 0x0 /* block length: 512 bytes */
1735 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1740 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1741 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1743 * LLBA bit in msense(10) ignored (compliant)
1746 page_control
= scsicmd
[2] >> 6;
1747 switch (page_control
) {
1748 case 0: /* current */
1749 break; /* supported */
1751 goto saving_not_supp
;
1752 case 1: /* changeable */
1753 case 2: /* defaults */
1759 output_len
= 4 + (ebd
? 8 : 0);
1760 alloc_len
= scsicmd
[4];
1762 output_len
= 8 + (ebd
? 8 : 0);
1763 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1765 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1767 p
= rbuf
+ output_len
;
1768 last
= rbuf
+ minlen
- 1;
1770 pg
= scsicmd
[2] & 0x3f;
1773 * No mode subpages supported (yet) but asking for _all_
1774 * subpages may be valid
1776 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
1780 case RW_RECOVERY_MPAGE
:
1781 output_len
+= ata_msense_rw_recovery(&p
, last
);
1785 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1788 case CONTROL_MPAGE
: {
1789 output_len
+= ata_msense_ctl_mode(&p
, last
);
1794 output_len
+= ata_msense_rw_recovery(&p
, last
);
1795 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1796 output_len
+= ata_msense_ctl_mode(&p
, last
);
1799 default: /* invalid page code */
1807 if (ata_dev_supports_fua(args
->id
) && dev
->flags
& ATA_DFLAG_LBA48
&&
1808 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
1813 rbuf
[0] = output_len
;
1818 rbuf
[3] = sizeof(sat_blk_desc
);
1820 memcpy(rbuf
+ 4, sat_blk_desc
,
1821 sizeof(sat_blk_desc
));
1825 rbuf
[0] = output_len
>> 8;
1827 rbuf
[1] = output_len
;
1832 rbuf
[7] = sizeof(sat_blk_desc
);
1834 memcpy(rbuf
+ 8, sat_blk_desc
,
1835 sizeof(sat_blk_desc
));
1841 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1842 /* "Invalid field in cbd" */
1846 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
1847 /* "Saving parameters not supported" */
1852 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1853 * @args: device IDENTIFY data / SCSI command of interest.
1854 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1855 * @buflen: Response buffer length.
1857 * Simulate READ CAPACITY commands.
1860 * spin_lock_irqsave(host_set lock)
1863 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1864 unsigned int buflen
)
1871 if (ata_id_has_lba(args
->id
)) {
1872 if (ata_id_has_lba48(args
->id
))
1873 n_sectors
= ata_id_u64(args
->id
, 100);
1875 n_sectors
= ata_id_u32(args
->id
, 60);
1877 /* CHS default translation */
1878 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1880 if (ata_id_current_chs_valid(args
->id
))
1881 /* CHS current translation */
1882 n_sectors
= ata_id_u32(args
->id
, 57);
1885 n_sectors
--; /* ATA TotalUserSectors - 1 */
1887 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1888 if( n_sectors
>= 0xffffffffULL
)
1889 tmp
= 0xffffffff ; /* Return max count on overflow */
1893 /* sector count, 32-bit */
1894 rbuf
[0] = tmp
>> (8 * 3);
1895 rbuf
[1] = tmp
>> (8 * 2);
1896 rbuf
[2] = tmp
>> (8 * 1);
1900 tmp
= ATA_SECT_SIZE
;
1905 /* sector count, 64-bit */
1906 tmp
= n_sectors
>> (8 * 4);
1907 rbuf
[2] = tmp
>> (8 * 3);
1908 rbuf
[3] = tmp
>> (8 * 2);
1909 rbuf
[4] = tmp
>> (8 * 1);
1912 rbuf
[6] = tmp
>> (8 * 3);
1913 rbuf
[7] = tmp
>> (8 * 2);
1914 rbuf
[8] = tmp
>> (8 * 1);
1918 tmp
= ATA_SECT_SIZE
;
1919 rbuf
[12] = tmp
>> 8;
1927 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1928 * @args: device IDENTIFY data / SCSI command of interest.
1929 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1930 * @buflen: Response buffer length.
1932 * Simulate REPORT LUNS command.
1935 * spin_lock_irqsave(host_set lock)
1938 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1939 unsigned int buflen
)
1942 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1948 * ata_scsi_set_sense - Set SCSI sense data and status
1949 * @cmd: SCSI request to be handled
1950 * @sk: SCSI-defined sense key
1951 * @asc: SCSI-defined additional sense code
1952 * @ascq: SCSI-defined additional sense code qualifier
1954 * Helper function that builds a valid fixed format, current
1955 * response code and the given sense key (sk), additional sense
1956 * code (asc) and additional sense code qualifier (ascq) with
1957 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
1958 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
1964 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
1966 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1968 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
1969 cmd
->sense_buffer
[2] = sk
;
1970 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
1971 cmd
->sense_buffer
[12] = asc
;
1972 cmd
->sense_buffer
[13] = ascq
;
1976 * ata_scsi_badcmd - End a SCSI request with an error
1977 * @cmd: SCSI request to be handled
1978 * @done: SCSI command completion function
1979 * @asc: SCSI-defined additional sense code
1980 * @ascq: SCSI-defined additional sense code qualifier
1982 * Helper function that completes a SCSI command with
1983 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1984 * and the specified additional sense codes.
1987 * spin_lock_irqsave(host_set lock)
1990 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
1993 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
1998 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2000 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2001 /* FIXME: not quite right; we don't want the
2002 * translation of taskfile registers into
2003 * a sense descriptors, since that's only
2004 * correct for ATA, not ATAPI
2006 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
2007 ata_gen_ata_desc_sense(qc
);
2010 qc
->scsidone(qc
->scsicmd
);
2014 /* is it pointless to prefer PIO for "safety reasons"? */
2015 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2017 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2020 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2022 struct ata_port
*ap
= qc
->ap
;
2023 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2025 DPRINTK("ATAPI request sense\n");
2027 /* FIXME: is this needed? */
2028 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
2030 ap
->ops
->tf_read(ap
, &qc
->tf
);
2032 /* fill these in, for the case where they are -not- overwritten */
2033 cmd
->sense_buffer
[0] = 0x70;
2034 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2038 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
2039 qc
->dma_dir
= DMA_FROM_DEVICE
;
2041 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2042 qc
->cdb
[0] = REQUEST_SENSE
;
2043 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2045 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2046 qc
->tf
.command
= ATA_CMD_PACKET
;
2048 if (ata_pio_use_silly(ap
)) {
2049 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2050 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2052 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2053 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2054 qc
->tf
.lbah
= (8 * 1024) >> 8;
2056 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2058 qc
->complete_fn
= atapi_sense_complete
;
2065 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2067 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2068 unsigned int err_mask
= qc
->err_mask
;
2070 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2072 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2073 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2074 atapi_request_sense(qc
);
2076 } else if (unlikely(err_mask
)) {
2077 /* FIXME: not quite right; we don't want the
2078 * translation of taskfile registers into
2079 * a sense descriptors, since that's only
2080 * correct for ATA, not ATAPI
2082 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
2083 ata_gen_ata_desc_sense(qc
);
2085 u8
*scsicmd
= cmd
->cmnd
;
2087 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2089 unsigned int buflen
;
2091 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2093 /* ATAPI devices typically report zero for their SCSI version,
2094 * and sometimes deviate from the spec WRT response data
2095 * format. If SCSI version is reported as zero like normal,
2096 * then we make the following fixups: 1) Fake MMC-5 version,
2097 * to indicate to the Linux scsi midlayer this is a modern
2098 * device. 2) Ensure response data format / ATAPI information
2099 * are always correct.
2106 ata_scsi_rbuf_put(cmd
, buf
);
2109 cmd
->result
= SAM_STAT_GOOD
;
2116 * atapi_xlat - Initialize PACKET taskfile
2117 * @qc: command structure to be initialized
2118 * @scsicmd: SCSI CDB associated with this PACKET command
2121 * spin_lock_irqsave(host_set lock)
2124 * Zero on success, non-zero on failure.
2127 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2129 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2130 struct ata_device
*dev
= qc
->dev
;
2131 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2132 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2135 /* Check whether ATAPI DMA is safe */
2136 if (ata_check_atapi_dma(qc
))
2139 memcpy(&qc
->cdb
, scsicmd
, dev
->cdb_len
);
2141 qc
->complete_fn
= atapi_qc_complete
;
2143 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2144 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2145 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2146 DPRINTK("direction: write\n");
2149 qc
->tf
.command
= ATA_CMD_PACKET
;
2151 /* no data, or PIO data xfer */
2152 if (using_pio
|| nodata
) {
2154 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2156 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2157 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2158 qc
->tf
.lbah
= (8 * 1024) >> 8;
2163 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2164 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2166 if (atapi_dmadir
&& (cmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2167 /* some SATA bridges need us to indicate data xfer direction */
2168 qc
->tf
.feature
|= ATAPI_DMADIR
;
2171 qc
->nbytes
= cmd
->bufflen
;
2177 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2178 * @ap: ATA port to which the device is attached
2179 * @scsidev: SCSI device from which we derive the ATA device
2181 * Given various information provided in struct scsi_cmnd,
2182 * map that onto an ATA bus, and using that mapping
2183 * determine which ata_device is associated with the
2184 * SCSI command to be sent.
2187 * spin_lock_irqsave(host_set lock)
2190 * Associated ATA device, or %NULL if not found.
2193 static struct ata_device
*
2194 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2196 struct ata_device
*dev
;
2198 /* skip commands not addressed to targets we simulate */
2199 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
2200 dev
= &ap
->device
[scsidev
->id
];
2204 if (unlikely((scsidev
->channel
!= 0) ||
2205 (scsidev
->lun
!= 0)))
2208 if (unlikely(!ata_dev_enabled(dev
)))
2211 if (!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2212 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2213 printk(KERN_WARNING
"ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2214 ap
->id
, dev
->devno
, atapi_enabled
? "not supported with this driver" : "disabled");
2223 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2224 * @byte1: Byte 1 from pass-thru CDB.
2227 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2230 ata_scsi_map_proto(u8 byte1
)
2232 switch((byte1
& 0x1e) >> 1) {
2233 case 3: /* Non-data */
2234 return ATA_PROT_NODATA
;
2237 return ATA_PROT_DMA
;
2239 case 4: /* PIO Data-in */
2240 case 5: /* PIO Data-out */
2241 return ATA_PROT_PIO
;
2243 case 10: /* Device Reset */
2244 case 0: /* Hard Reset */
2246 case 2: /* Bus Idle */
2247 case 7: /* Packet */
2248 case 8: /* DMA Queued */
2249 case 9: /* Device Diagnostic */
2250 case 11: /* UDMA Data-in */
2251 case 12: /* UDMA Data-Out */
2252 case 13: /* FPDMA */
2253 default: /* Reserved */
2257 return ATA_PROT_UNKNOWN
;
2261 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2262 * @qc: command structure to be initialized
2263 * @scsicmd: SCSI command to convert
2265 * Handles either 12 or 16-byte versions of the CDB.
2268 * Zero on success, non-zero on failure.
2271 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2273 struct ata_taskfile
*tf
= &(qc
->tf
);
2274 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2276 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2279 if (scsicmd
[1] & 0xe0)
2280 /* PIO multi not supported yet */
2284 * 12 and 16 byte CDBs use different offsets to
2285 * provide the various register values.
2287 if (scsicmd
[0] == ATA_16
) {
2289 * 16-byte CDB - may contain extended commands.
2291 * If that is the case, copy the upper byte register values.
2293 if (scsicmd
[1] & 0x01) {
2294 tf
->hob_feature
= scsicmd
[3];
2295 tf
->hob_nsect
= scsicmd
[5];
2296 tf
->hob_lbal
= scsicmd
[7];
2297 tf
->hob_lbam
= scsicmd
[9];
2298 tf
->hob_lbah
= scsicmd
[11];
2299 tf
->flags
|= ATA_TFLAG_LBA48
;
2301 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2304 * Always copy low byte, device and command registers.
2306 tf
->feature
= scsicmd
[4];
2307 tf
->nsect
= scsicmd
[6];
2308 tf
->lbal
= scsicmd
[8];
2309 tf
->lbam
= scsicmd
[10];
2310 tf
->lbah
= scsicmd
[12];
2311 tf
->device
= scsicmd
[13];
2312 tf
->command
= scsicmd
[14];
2315 * 12-byte CDB - incapable of extended commands.
2317 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2319 tf
->feature
= scsicmd
[3];
2320 tf
->nsect
= scsicmd
[4];
2321 tf
->lbal
= scsicmd
[5];
2322 tf
->lbam
= scsicmd
[6];
2323 tf
->lbah
= scsicmd
[7];
2324 tf
->device
= scsicmd
[8];
2325 tf
->command
= scsicmd
[9];
2328 * If slave is possible, enforce correct master/slave bit
2330 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2331 tf
->device
= qc
->dev
->devno
?
2332 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2335 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2336 * SET_FEATURES - XFER MODE must be preceded/succeeded
2337 * by an update to hardware-specific registers for each
2338 * controller (i.e. the reason for ->set_piomode(),
2339 * ->set_dmamode(), and ->post_set_mode() hooks).
2341 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2342 && (tf
->feature
== SETFEATURES_XFER
))
2346 * Set flags so that all registers will be written,
2347 * and pass on write indication (used for PIO/DMA
2350 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2352 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2353 tf
->flags
|= ATA_TFLAG_WRITE
;
2356 * Set transfer length.
2358 * TODO: find out if we need to do more here to
2359 * cover scatter/gather case.
2361 qc
->nsect
= cmd
->bufflen
/ ATA_SECT_SIZE
;
2366 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2367 /* "Invalid field in cdb" */
2372 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2374 * @cmd: SCSI command opcode to consider
2376 * Look up the SCSI command given, and determine whether the
2377 * SCSI command is to be translated or simulated.
2380 * Pointer to translation function if possible, %NULL if not.
2383 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2393 return ata_scsi_rw_xlat
;
2395 case SYNCHRONIZE_CACHE
:
2396 if (ata_try_flush_cache(dev
))
2397 return ata_scsi_flush_xlat
;
2402 return ata_scsi_verify_xlat
;
2406 return ata_scsi_pass_thru
;
2409 return ata_scsi_start_stop_xlat
;
2416 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2417 * @ap: ATA port to which the command was being sent
2418 * @cmd: SCSI command to dump
2420 * Prints the contents of a SCSI command via printk().
2423 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2424 struct scsi_cmnd
*cmd
)
2427 struct scsi_device
*scsidev
= cmd
->device
;
2428 u8
*scsicmd
= cmd
->cmnd
;
2430 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2432 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2433 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2434 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2439 static inline void __ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
2440 struct ata_port
*ap
, struct ata_device
*dev
)
2442 if (dev
->class == ATA_DEV_ATA
) {
2443 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2447 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
2449 ata_scsi_simulate(ap
, dev
, cmd
, done
);
2451 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
2455 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2456 * @cmd: SCSI command to be sent
2457 * @done: Completion function, called when command is complete
2459 * In some cases, this function translates SCSI commands into
2460 * ATA taskfiles, and queues the taskfiles to be sent to
2461 * hardware. In other cases, this function simulates a
2462 * SCSI device by evaluating and responding to certain
2463 * SCSI commands. This creates the overall effect of
2464 * ATA and ATAPI devices appearing as SCSI devices.
2467 * Releases scsi-layer-held lock, and obtains host_set lock.
2473 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2475 struct ata_port
*ap
;
2476 struct ata_device
*dev
;
2477 struct scsi_device
*scsidev
= cmd
->device
;
2478 struct Scsi_Host
*shost
= scsidev
->host
;
2480 ap
= (struct ata_port
*) &shost
->hostdata
[0];
2482 spin_unlock(shost
->host_lock
);
2483 spin_lock(&ap
->host_set
->lock
);
2485 ata_scsi_dump_cdb(ap
, cmd
);
2487 dev
= ata_scsi_find_dev(ap
, scsidev
);
2489 __ata_scsi_queuecmd(cmd
, done
, ap
, dev
);
2491 cmd
->result
= (DID_BAD_TARGET
<< 16);
2495 spin_unlock(&ap
->host_set
->lock
);
2496 spin_lock(shost
->host_lock
);
2501 * ata_scsi_simulate - simulate SCSI command on ATA device
2502 * @ap: port the device is connected to
2503 * @dev: the target device
2504 * @cmd: SCSI command being sent to device.
2505 * @done: SCSI command completion function.
2507 * Interprets and directly executes a select list of SCSI commands
2508 * that can be handled internally.
2511 * spin_lock_irqsave(host_set lock)
2514 void ata_scsi_simulate(struct ata_port
*ap
, struct ata_device
*dev
,
2515 struct scsi_cmnd
*cmd
,
2516 void (*done
)(struct scsi_cmnd
*))
2518 struct ata_scsi_args args
;
2519 const u8
*scsicmd
= cmd
->cmnd
;
2527 switch(scsicmd
[0]) {
2528 /* no-op's, complete with success */
2529 case SYNCHRONIZE_CACHE
:
2533 case TEST_UNIT_READY
:
2534 case FORMAT_UNIT
: /* FIXME: correct? */
2535 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2536 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2540 if (scsicmd
[1] & 2) /* is CmdDt set? */
2541 ata_scsi_invalid_field(cmd
, done
);
2542 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2543 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2544 else if (scsicmd
[2] == 0x00)
2545 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2546 else if (scsicmd
[2] == 0x80)
2547 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2548 else if (scsicmd
[2] == 0x83)
2549 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2551 ata_scsi_invalid_field(cmd
, done
);
2556 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2559 case MODE_SELECT
: /* unconditionally return */
2560 case MODE_SELECT_10
: /* bad-field-in-cdb */
2561 ata_scsi_invalid_field(cmd
, done
);
2565 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2568 case SERVICE_ACTION_IN
:
2569 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2570 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2572 ata_scsi_invalid_field(cmd
, done
);
2576 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2579 /* mandatory commands we haven't implemented yet */
2582 /* all other commands */
2584 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2585 /* "Invalid command operation code" */
2591 void ata_scsi_scan_host(struct ata_port
*ap
)
2593 struct ata_device
*dev
;
2596 if (ap
->flags
& ATA_FLAG_DISABLED
)
2599 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2600 dev
= &ap
->device
[i
];
2602 if (ata_dev_enabled(dev
))
2603 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);