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_strategy_handler
= ata_scsi_error
,
102 .eh_timed_out
= ata_scsi_timed_out
,
106 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
107 void (*done
)(struct scsi_cmnd
*))
109 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
110 /* "Invalid field in cbd" */
115 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
116 * @sdev: SCSI device for which BIOS geometry is to be determined
117 * @bdev: block device associated with @sdev
118 * @capacity: capacity of SCSI device
119 * @geom: location to which geometry will be output
121 * Generic bios head/sector/cylinder calculator
122 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
123 * mapping. Some situations may arise where the disk is not
124 * bootable if this is not used.
127 * Defined by the SCSI layer. We don't really care.
132 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
133 sector_t capacity
, int geom
[])
137 sector_div(capacity
, 255*63);
144 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
145 * @scsidev: Device to which we are issuing command
146 * @arg: User provided data for issuing command
149 * Defined by the SCSI layer. We don't really care.
152 * Zero on success, negative errno on error.
155 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
158 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
159 u8 args
[4], *argbuf
= NULL
;
161 struct scsi_sense_hdr sshdr
;
162 enum dma_data_direction data_dir
;
167 if (copy_from_user(args
, arg
, sizeof(args
)))
170 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
173 argsize
= SECTOR_SIZE
* args
[3];
174 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
175 if (argbuf
== NULL
) {
180 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
181 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
182 block count in sector count field */
183 data_dir
= DMA_FROM_DEVICE
;
185 scsi_cmd
[1] = (3 << 1); /* Non-data */
186 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
190 scsi_cmd
[0] = ATA_16
;
192 scsi_cmd
[4] = args
[2];
193 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
194 scsi_cmd
[6] = args
[3];
195 scsi_cmd
[8] = args
[1];
199 scsi_cmd
[6] = args
[1];
201 scsi_cmd
[14] = args
[0];
203 /* Good values for timeout and retries? Values below
204 from scsi_ioctl_send_command() for default case... */
205 if (scsi_execute_req(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
206 &sshdr
, (10*HZ
), 5)) {
211 /* Need code to retrieve data from check condition? */
214 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
224 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
225 * @scsidev: Device to which we are issuing command
226 * @arg: User provided data for issuing command
229 * Defined by the SCSI layer. We don't really care.
232 * Zero on success, negative errno on error.
234 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
237 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
239 struct scsi_sense_hdr sshdr
;
244 if (copy_from_user(args
, arg
, sizeof(args
)))
247 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
248 scsi_cmd
[0] = ATA_16
;
249 scsi_cmd
[1] = (3 << 1); /* Non-data */
250 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
251 scsi_cmd
[4] = args
[1];
252 scsi_cmd
[6] = args
[2];
253 scsi_cmd
[8] = args
[3];
254 scsi_cmd
[10] = args
[4];
255 scsi_cmd
[12] = args
[5];
256 scsi_cmd
[14] = args
[0];
258 /* Good values for timeout and retries? Values below
259 from scsi_ioctl_send_command() for default case... */
260 if (scsi_execute_req(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0, &sshdr
,
264 /* Need code to retrieve data from check condition? */
268 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
270 int val
= -EINVAL
, rc
= -EINVAL
;
273 case ATA_IOC_GET_IO32
:
275 if (copy_to_user(arg
, &val
, 1))
279 case ATA_IOC_SET_IO32
:
280 val
= (unsigned long) arg
;
286 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
288 return ata_cmd_ioctl(scsidev
, arg
);
290 case HDIO_DRIVE_TASK
:
291 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
293 return ata_task_ioctl(scsidev
, arg
);
304 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
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_device
*dev
,
324 struct scsi_cmnd
*cmd
,
325 void (*done
)(struct scsi_cmnd
*))
327 struct ata_queued_cmd
*qc
;
329 qc
= ata_qc_new_init(dev
);
335 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
336 qc
->n_elem
= cmd
->use_sg
;
338 qc
->__sg
= &qc
->sgent
;
342 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
350 * ata_dump_status - user friendly display of error info
351 * @id: id of the port in question
352 * @tf: ptr to filled out taskfile
354 * Decode and dump the ATA error/status registers for the user so
355 * that they have some idea what really happened at the non
356 * make-believe layer.
359 * inherited from caller
361 void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
363 u8 stat
= tf
->command
, err
= tf
->feature
;
365 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
366 if (stat
& ATA_BUSY
) {
367 printk("Busy }\n"); /* Data is not valid in this case */
369 if (stat
& 0x40) printk("DriveReady ");
370 if (stat
& 0x20) printk("DeviceFault ");
371 if (stat
& 0x10) printk("SeekComplete ");
372 if (stat
& 0x08) printk("DataRequest ");
373 if (stat
& 0x04) printk("CorrectedError ");
374 if (stat
& 0x02) printk("Index ");
375 if (stat
& 0x01) printk("Error ");
379 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
380 if (err
& 0x04) printk("DriveStatusError ");
382 if (err
& 0x04) printk("BadCRC ");
383 else printk("Sector ");
385 if (err
& 0x40) printk("UncorrectableError ");
386 if (err
& 0x10) printk("SectorIdNotFound ");
387 if (err
& 0x02) printk("TrackZeroNotFound ");
388 if (err
& 0x01) printk("AddrMarkNotFound ");
394 int ata_scsi_device_resume(struct scsi_device
*sdev
)
396 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
397 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
399 return ata_device_resume(dev
);
402 int ata_scsi_device_suspend(struct scsi_device
*sdev
, pm_message_t state
)
404 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
405 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
407 return ata_device_suspend(dev
, state
);
411 * ata_to_sense_error - convert ATA error to SCSI error
412 * @id: ATA device number
413 * @drv_stat: value contained in ATA status register
414 * @drv_err: value contained in ATA error register
415 * @sk: the sense key we'll fill out
416 * @asc: the additional sense code we'll fill out
417 * @ascq: the additional sense code qualifier we'll fill out
418 * @verbose: be verbose
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
,
428 u8
*ascq
, int verbose
)
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 */
494 printk(KERN_WARNING
"ata%u: no sense translation for "
495 "error 0x%02x\n", id
, drv_err
);
498 /* Fall back to interpreting status bits */
499 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
500 if (stat_table
[i
][0] & drv_stat
) {
501 *sk
= stat_table
[i
][1];
502 *asc
= stat_table
[i
][2];
503 *ascq
= stat_table
[i
][3];
507 /* No error? Undecoded? */
509 printk(KERN_WARNING
"ata%u: no sense translation for "
510 "status: 0x%02x\n", id
, drv_stat
);
512 /* We need a sensible error return here, which is tricky, and one
513 that won't cause people to do things like return a disk wrongly */
514 *sk
= ABORTED_COMMAND
;
520 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
521 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
522 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
527 * ata_gen_ata_desc_sense - Generate check condition sense block.
528 * @qc: Command that completed.
530 * This function is specific to the ATA descriptor format sense
531 * block specified for the ATA pass through commands. Regardless
532 * of whether the command errored or not, return a sense
533 * block. Copy all controller registers into the sense
534 * block. Clear sense key, ASC & ASCQ if there is no error.
537 * spin_lock_irqsave(host_set lock)
539 void ata_gen_ata_desc_sense(struct ata_queued_cmd
*qc
)
541 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
542 struct ata_taskfile
*tf
= &qc
->result_tf
;
543 unsigned char *sb
= cmd
->sense_buffer
;
544 unsigned char *desc
= sb
+ 8;
545 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
547 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
549 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
552 * Use ata_to_sense_error() to map status register bits
553 * onto sense key, asc & ascq.
556 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
557 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
558 &sb
[1], &sb
[2], &sb
[3], verbose
);
563 * Sense data is current and format is descriptor.
570 * Set length of additional sense data.
571 * Since we only populate descriptor 0, the total
572 * length is the same (fixed) length as descriptor 0.
574 desc
[1] = sb
[7] = 14;
577 * Copy registers into sense buffer.
580 desc
[3] = tf
->feature
; /* == error reg */
585 desc
[12] = tf
->device
;
586 desc
[13] = tf
->command
; /* == status reg */
589 * Fill in Extend bit, and the high order bytes
592 if (tf
->flags
& ATA_TFLAG_LBA48
) {
594 desc
[4] = tf
->hob_nsect
;
595 desc
[6] = tf
->hob_lbal
;
596 desc
[8] = tf
->hob_lbam
;
597 desc
[10] = tf
->hob_lbah
;
602 * ata_gen_fixed_sense - generate a SCSI fixed sense block
603 * @qc: Command that we are erroring out
605 * Leverage ata_to_sense_error() to give us the codes. Fit our
606 * LBA in here if there's room.
609 * inherited from caller
611 void ata_gen_fixed_sense(struct ata_queued_cmd
*qc
)
613 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
614 struct ata_taskfile
*tf
= &qc
->result_tf
;
615 unsigned char *sb
= cmd
->sense_buffer
;
616 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
618 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
620 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
623 * Use ata_to_sense_error() to map status register bits
624 * onto sense key, asc & ascq.
627 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
628 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
629 &sb
[2], &sb
[12], &sb
[13], verbose
);
636 if (tf
->flags
& ATA_TFLAG_LBA48
) {
637 /* TODO: find solution for LBA48 descriptors */
640 else if (tf
->flags
& ATA_TFLAG_LBA
) {
641 /* A small (28b) LBA will fit in the 32b info field */
642 sb
[0] |= 0x80; /* set valid bit */
643 sb
[3] = tf
->device
& 0x0f;
654 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
656 sdev
->use_10_for_rw
= 1;
657 sdev
->use_10_for_ms
= 1;
660 static void ata_scsi_dev_config(struct scsi_device
*sdev
,
661 struct ata_device
*dev
)
663 unsigned int max_sectors
;
665 /* TODO: 2048 is an arbitrary number, not the
666 * hardware maximum. This should be increased to
667 * 65534 when Jens Axboe's patch for dynamically
668 * determining max_sectors is merged.
670 max_sectors
= ATA_MAX_SECTORS
;
671 if (dev
->flags
& ATA_DFLAG_LBA48
)
673 if (dev
->max_sectors
)
674 max_sectors
= dev
->max_sectors
;
676 blk_queue_max_sectors(sdev
->request_queue
, max_sectors
);
679 * SATA DMA transfers must be multiples of 4 byte, so
680 * we need to pad ATAPI transfers using an extra sg.
681 * Decrement max hw segments accordingly.
683 if (dev
->class == ATA_DEV_ATAPI
) {
684 request_queue_t
*q
= sdev
->request_queue
;
685 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
690 * ata_scsi_slave_config - Set SCSI device attributes
691 * @sdev: SCSI device to examine
693 * This is called before we actually start reading
694 * and writing to the device, to configure certain
695 * SCSI mid-layer behaviors.
698 * Defined by SCSI layer. We don't really care.
701 int ata_scsi_slave_config(struct scsi_device
*sdev
)
703 ata_scsi_sdev_config(sdev
);
705 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
707 if (sdev
->id
< ATA_MAX_DEVICES
) {
709 struct ata_device
*dev
;
711 ap
= ata_shost_to_port(sdev
->host
);
712 dev
= &ap
->device
[sdev
->id
];
714 ata_scsi_dev_config(sdev
, dev
);
717 return 0; /* scsi layer doesn't check return value, sigh */
721 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
722 * @qc: Storage for translated ATA taskfile
723 * @scsicmd: SCSI command to translate
725 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
726 * (to start). Perhaps these commands should be preceded by
727 * CHECK POWER MODE to see what power mode the device is already in.
728 * [See SAT revision 5 at www.t10.org]
731 * spin_lock_irqsave(host_set lock)
734 * Zero on success, non-zero on error.
737 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
740 struct ata_taskfile
*tf
= &qc
->tf
;
742 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
743 tf
->protocol
= ATA_PROT_NODATA
;
744 if (scsicmd
[1] & 0x1) {
745 ; /* ignore IMMED bit, violates sat-r05 */
747 if (scsicmd
[4] & 0x2)
748 goto invalid_fld
; /* LOEJ bit set not supported */
749 if (((scsicmd
[4] >> 4) & 0xf) != 0)
750 goto invalid_fld
; /* power conditions not supported */
751 if (scsicmd
[4] & 0x1) {
752 tf
->nsect
= 1; /* 1 sector, lba=0 */
754 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
755 tf
->flags
|= ATA_TFLAG_LBA
;
760 tf
->device
|= ATA_LBA
;
763 tf
->lbal
= 0x1; /* sect */
764 tf
->lbam
= 0x0; /* cyl low */
765 tf
->lbah
= 0x0; /* cyl high */
768 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
770 tf
->nsect
= 0; /* time period value (0 implies now) */
771 tf
->command
= ATA_CMD_STANDBY
;
772 /* Consider: ATA STANDBY IMMEDIATE command */
775 * Standby and Idle condition timers could be implemented but that
776 * would require libata to implement the Power condition mode page
777 * and allow the user to change it. Changing mode pages requires
778 * MODE SELECT to be implemented.
784 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
785 /* "Invalid field in cbd" */
791 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
792 * @qc: Storage for translated ATA taskfile
793 * @scsicmd: SCSI command to translate (ignored)
795 * Sets up an ATA taskfile to issue FLUSH CACHE or
799 * spin_lock_irqsave(host_set lock)
802 * Zero on success, non-zero on error.
805 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
807 struct ata_taskfile
*tf
= &qc
->tf
;
809 tf
->flags
|= ATA_TFLAG_DEVICE
;
810 tf
->protocol
= ATA_PROT_NODATA
;
812 if ((qc
->dev
->flags
& ATA_DFLAG_LBA48
) &&
813 (ata_id_has_flush_ext(qc
->dev
->id
)))
814 tf
->command
= ATA_CMD_FLUSH_EXT
;
816 tf
->command
= ATA_CMD_FLUSH
;
822 * scsi_6_lba_len - Get LBA and transfer length
823 * @scsicmd: SCSI command to translate
825 * Calculate LBA and transfer length for 6-byte commands.
829 * @plen: the transfer length
832 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
837 VPRINTK("six-byte command\n");
839 lba
|= ((u64
)scsicmd
[2]) << 8;
840 lba
|= ((u64
)scsicmd
[3]);
842 len
|= ((u32
)scsicmd
[4]);
849 * scsi_10_lba_len - Get LBA and transfer length
850 * @scsicmd: SCSI command to translate
852 * Calculate LBA and transfer length for 10-byte commands.
856 * @plen: the transfer length
859 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
864 VPRINTK("ten-byte command\n");
866 lba
|= ((u64
)scsicmd
[2]) << 24;
867 lba
|= ((u64
)scsicmd
[3]) << 16;
868 lba
|= ((u64
)scsicmd
[4]) << 8;
869 lba
|= ((u64
)scsicmd
[5]);
871 len
|= ((u32
)scsicmd
[7]) << 8;
872 len
|= ((u32
)scsicmd
[8]);
879 * scsi_16_lba_len - Get LBA and transfer length
880 * @scsicmd: SCSI command to translate
882 * Calculate LBA and transfer length for 16-byte commands.
886 * @plen: the transfer length
889 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
894 VPRINTK("sixteen-byte command\n");
896 lba
|= ((u64
)scsicmd
[2]) << 56;
897 lba
|= ((u64
)scsicmd
[3]) << 48;
898 lba
|= ((u64
)scsicmd
[4]) << 40;
899 lba
|= ((u64
)scsicmd
[5]) << 32;
900 lba
|= ((u64
)scsicmd
[6]) << 24;
901 lba
|= ((u64
)scsicmd
[7]) << 16;
902 lba
|= ((u64
)scsicmd
[8]) << 8;
903 lba
|= ((u64
)scsicmd
[9]);
905 len
|= ((u32
)scsicmd
[10]) << 24;
906 len
|= ((u32
)scsicmd
[11]) << 16;
907 len
|= ((u32
)scsicmd
[12]) << 8;
908 len
|= ((u32
)scsicmd
[13]);
915 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
916 * @qc: Storage for translated ATA taskfile
917 * @scsicmd: SCSI command to translate
919 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
922 * spin_lock_irqsave(host_set lock)
925 * Zero on success, non-zero on error.
928 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
930 struct ata_taskfile
*tf
= &qc
->tf
;
931 struct ata_device
*dev
= qc
->dev
;
932 u64 dev_sectors
= qc
->dev
->n_sectors
;
936 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
937 tf
->protocol
= ATA_PROT_NODATA
;
939 if (scsicmd
[0] == VERIFY
)
940 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
941 else if (scsicmd
[0] == VERIFY_16
)
942 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
948 if (block
>= dev_sectors
)
950 if ((block
+ n_block
) > dev_sectors
)
953 if (dev
->flags
& ATA_DFLAG_LBA
) {
954 tf
->flags
|= ATA_TFLAG_LBA
;
956 if (lba_28_ok(block
, n_block
)) {
958 tf
->command
= ATA_CMD_VERIFY
;
959 tf
->device
|= (block
>> 24) & 0xf;
960 } else if (lba_48_ok(block
, n_block
)) {
961 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
965 tf
->flags
|= ATA_TFLAG_LBA48
;
966 tf
->command
= ATA_CMD_VERIFY_EXT
;
968 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
970 tf
->hob_lbah
= (block
>> 40) & 0xff;
971 tf
->hob_lbam
= (block
>> 32) & 0xff;
972 tf
->hob_lbal
= (block
>> 24) & 0xff;
974 /* request too large even for LBA48 */
977 tf
->nsect
= n_block
& 0xff;
979 tf
->lbah
= (block
>> 16) & 0xff;
980 tf
->lbam
= (block
>> 8) & 0xff;
981 tf
->lbal
= block
& 0xff;
983 tf
->device
|= ATA_LBA
;
986 u32 sect
, head
, cyl
, track
;
988 if (!lba_28_ok(block
, n_block
))
991 /* Convert LBA to CHS */
992 track
= (u32
)block
/ dev
->sectors
;
993 cyl
= track
/ dev
->heads
;
994 head
= track
% dev
->heads
;
995 sect
= (u32
)block
% dev
->sectors
+ 1;
997 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
998 (u32
)block
, track
, cyl
, head
, sect
);
1000 /* Check whether the converted CHS can fit.
1004 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1007 tf
->command
= ATA_CMD_VERIFY
;
1008 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1011 tf
->lbah
= cyl
>> 8;
1018 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1019 /* "Invalid field in cbd" */
1023 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1024 /* "Logical Block Address out of range" */
1028 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1033 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1034 * @qc: Storage for translated ATA taskfile
1035 * @scsicmd: SCSI command to translate
1037 * Converts any of six SCSI read/write commands into the
1038 * ATA counterpart, including starting sector (LBA),
1039 * sector count, and taking into account the device's LBA48
1042 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1043 * %WRITE_16 are currently supported.
1046 * spin_lock_irqsave(host_set lock)
1049 * Zero on success, non-zero on error.
1052 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1054 struct ata_taskfile
*tf
= &qc
->tf
;
1055 struct ata_device
*dev
= qc
->dev
;
1059 qc
->flags
|= ATA_QCFLAG_IO
;
1060 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1062 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1063 scsicmd
[0] == WRITE_16
)
1064 tf
->flags
|= ATA_TFLAG_WRITE
;
1066 /* Calculate the SCSI LBA, transfer length and FUA. */
1067 switch (scsicmd
[0]) {
1070 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1071 if (unlikely(scsicmd
[1] & (1 << 3)))
1072 tf
->flags
|= ATA_TFLAG_FUA
;
1076 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1078 /* for 6-byte r/w commands, transfer length 0
1079 * means 256 blocks of data, not 0 block.
1086 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1087 if (unlikely(scsicmd
[1] & (1 << 3)))
1088 tf
->flags
|= ATA_TFLAG_FUA
;
1091 DPRINTK("no-byte command\n");
1095 /* Check and compose ATA command */
1097 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1098 * length 0 means transfer 0 block of data.
1099 * However, for ATA R/W commands, sector count 0 means
1100 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1102 * WARNING: one or two older ATA drives treat 0 as 0...
1106 if (dev
->flags
& ATA_DFLAG_LBA
) {
1107 tf
->flags
|= ATA_TFLAG_LBA
;
1109 if (lba_28_ok(block
, n_block
)) {
1111 tf
->device
|= (block
>> 24) & 0xf;
1112 } else if (lba_48_ok(block
, n_block
)) {
1113 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1117 tf
->flags
|= ATA_TFLAG_LBA48
;
1119 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1121 tf
->hob_lbah
= (block
>> 40) & 0xff;
1122 tf
->hob_lbam
= (block
>> 32) & 0xff;
1123 tf
->hob_lbal
= (block
>> 24) & 0xff;
1125 /* request too large even for LBA48 */
1128 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1131 qc
->nsect
= n_block
;
1132 tf
->nsect
= n_block
& 0xff;
1134 tf
->lbah
= (block
>> 16) & 0xff;
1135 tf
->lbam
= (block
>> 8) & 0xff;
1136 tf
->lbal
= block
& 0xff;
1138 tf
->device
|= ATA_LBA
;
1141 u32 sect
, head
, cyl
, track
;
1143 /* The request -may- be too large for CHS addressing. */
1144 if (!lba_28_ok(block
, n_block
))
1147 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1150 /* Convert LBA to CHS */
1151 track
= (u32
)block
/ dev
->sectors
;
1152 cyl
= track
/ dev
->heads
;
1153 head
= track
% dev
->heads
;
1154 sect
= (u32
)block
% dev
->sectors
+ 1;
1156 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1157 (u32
)block
, track
, cyl
, head
, sect
);
1159 /* Check whether the converted CHS can fit.
1163 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1166 qc
->nsect
= n_block
;
1167 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1170 tf
->lbah
= cyl
>> 8;
1177 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1178 /* "Invalid field in cbd" */
1182 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1183 /* "Logical Block Address out of range" */
1187 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1191 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1193 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1194 u8
*cdb
= cmd
->cmnd
;
1195 int need_sense
= (qc
->err_mask
!= 0);
1197 /* For ATA pass thru (SAT) commands, generate a sense block if
1198 * user mandated it or if there's an error. Note that if we
1199 * generate because the user forced us to, a check condition
1200 * is generated and the ATA register values are returned
1201 * whether the command completed successfully or not. If there
1202 * was no error, SK, ASC and ASCQ will all be zero.
1204 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1205 ((cdb
[2] & 0x20) || need_sense
)) {
1206 ata_gen_ata_desc_sense(qc
);
1209 cmd
->result
= SAM_STAT_GOOD
;
1211 /* TODO: decide which descriptor format to use
1212 * for 48b LBA devices and call that here
1213 * instead of the fixed desc, which is only
1214 * good for smaller LBA (and maybe CHS?)
1217 ata_gen_fixed_sense(qc
);
1221 if (need_sense
&& !qc
->ap
->ops
->error_handler
)
1222 ata_dump_status(qc
->ap
->id
, &qc
->result_tf
);
1230 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1231 * @dev: ATA device to which the command is addressed
1232 * @cmd: SCSI command to execute
1233 * @done: SCSI command completion function
1234 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1236 * Our ->queuecommand() function has decided that the SCSI
1237 * command issued can be directly translated into an ATA
1238 * command, rather than handled internally.
1240 * This function sets up an ata_queued_cmd structure for the
1241 * SCSI command, and sends that ata_queued_cmd to the hardware.
1243 * The xlat_func argument (actor) returns 0 if ready to execute
1244 * ATA command, else 1 to finish translation. If 1 is returned
1245 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1246 * to be set reflecting an error condition or clean (early)
1250 * spin_lock_irqsave(host_set lock)
1253 static void ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1254 void (*done
)(struct scsi_cmnd
*),
1255 ata_xlat_func_t xlat_func
)
1257 struct ata_queued_cmd
*qc
;
1258 u8
*scsicmd
= cmd
->cmnd
;
1262 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1266 /* data is present; dma-map it */
1267 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1268 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1269 if (unlikely(cmd
->request_bufflen
< 1)) {
1270 ata_dev_printk(dev
, KERN_WARNING
,
1271 "WARNING: zero len r/w req\n");
1276 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1278 ata_sg_init_one(qc
, cmd
->request_buffer
,
1279 cmd
->request_bufflen
);
1281 qc
->dma_dir
= cmd
->sc_data_direction
;
1284 qc
->complete_fn
= ata_scsi_qc_complete
;
1286 if (xlat_func(qc
, scsicmd
))
1289 /* select device, send command to hardware */
1298 DPRINTK("EXIT - early finish (good or error)\n");
1304 cmd
->result
= (DID_ERROR
<< 16);
1306 DPRINTK("EXIT - internal\n");
1311 * ata_scsi_rbuf_get - Map response buffer.
1312 * @cmd: SCSI command containing buffer to be mapped.
1313 * @buf_out: Pointer to mapped area.
1315 * Maps buffer contained within SCSI command @cmd.
1318 * spin_lock_irqsave(host_set lock)
1321 * Length of response buffer.
1324 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1327 unsigned int buflen
;
1330 struct scatterlist
*sg
;
1332 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1333 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1334 buflen
= sg
->length
;
1336 buf
= cmd
->request_buffer
;
1337 buflen
= cmd
->request_bufflen
;
1345 * ata_scsi_rbuf_put - Unmap response buffer.
1346 * @cmd: SCSI command containing buffer to be unmapped.
1347 * @buf: buffer to unmap
1349 * Unmaps response buffer contained within @cmd.
1352 * spin_lock_irqsave(host_set lock)
1355 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1358 struct scatterlist
*sg
;
1360 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1361 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1366 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1367 * @args: device IDENTIFY data / SCSI command of interest.
1368 * @actor: Callback hook for desired SCSI command simulator
1370 * Takes care of the hard work of simulating a SCSI command...
1371 * Mapping the response buffer, calling the command's handler,
1372 * and handling the handler's return value. This return value
1373 * indicates whether the handler wishes the SCSI command to be
1374 * completed successfully (0), or not (in which case cmd->result
1375 * and sense buffer are assumed to be set).
1378 * spin_lock_irqsave(host_set lock)
1381 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1382 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1383 u8
*rbuf
, unsigned int buflen
))
1386 unsigned int buflen
, rc
;
1387 struct scsi_cmnd
*cmd
= args
->cmd
;
1389 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1390 memset(rbuf
, 0, buflen
);
1391 rc
= actor(args
, rbuf
, buflen
);
1392 ata_scsi_rbuf_put(cmd
, rbuf
);
1395 cmd
->result
= SAM_STAT_GOOD
;
1400 * ata_scsiop_inq_std - Simulate INQUIRY command
1401 * @args: device IDENTIFY data / SCSI command of interest.
1402 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1403 * @buflen: Response buffer length.
1405 * Returns standard device identification data associated
1406 * with non-VPD INQUIRY command output.
1409 * spin_lock_irqsave(host_set lock)
1412 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1413 unsigned int buflen
)
1418 0x5, /* claim SPC-3 version compatibility */
1423 /* set scsi removeable (RMB) bit per ata bit */
1424 if (ata_id_removeable(args
->id
))
1429 memcpy(rbuf
, hdr
, sizeof(hdr
));
1432 memcpy(&rbuf
[8], "ATA ", 8);
1433 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1434 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1435 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1436 memcpy(&rbuf
[32], "n/a ", 4);
1440 const u8 versions
[] = {
1441 0x60, /* SAM-3 (no version claimed) */
1444 0x20, /* SBC-2 (no version claimed) */
1447 0x60 /* SPC-3 (no version claimed) */
1450 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1457 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1458 * @args: device IDENTIFY data / SCSI command of interest.
1459 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1460 * @buflen: Response buffer length.
1462 * Returns list of inquiry VPD pages available.
1465 * spin_lock_irqsave(host_set lock)
1468 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1469 unsigned int buflen
)
1471 const u8 pages
[] = {
1472 0x00, /* page 0x00, this page */
1473 0x80, /* page 0x80, unit serial no page */
1474 0x83 /* page 0x83, device ident page */
1476 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1479 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1485 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1486 * @args: device IDENTIFY data / SCSI command of interest.
1487 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1488 * @buflen: Response buffer length.
1490 * Returns ATA device serial number.
1493 * spin_lock_irqsave(host_set lock)
1496 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1497 unsigned int buflen
)
1501 0x80, /* this page code */
1503 ATA_SERNO_LEN
, /* page len */
1505 memcpy(rbuf
, hdr
, sizeof(hdr
));
1507 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1508 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1509 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1515 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1516 * @args: device IDENTIFY data / SCSI command of interest.
1517 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1518 * @buflen: Response buffer length.
1520 * Yields two logical unit device identification designators:
1521 * - vendor specific ASCII containing the ATA serial number
1522 * - SAT defined "t10 vendor id based" containing ASCII vendor
1523 * name ("ATA "), model and serial numbers.
1526 * spin_lock_irqsave(host_set lock)
1529 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1530 unsigned int buflen
)
1533 const int sat_model_serial_desc_len
= 68;
1534 const int ata_model_byte_len
= 40;
1536 rbuf
[1] = 0x83; /* this page code */
1539 if (buflen
> (ATA_SERNO_LEN
+ num
+ 3)) {
1540 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1542 rbuf
[num
+ 3] = ATA_SERNO_LEN
;
1544 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1545 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1546 num
+= ATA_SERNO_LEN
;
1548 if (buflen
> (sat_model_serial_desc_len
+ num
+ 3)) {
1549 /* SAT defined lu model and serial numbers descriptor */
1550 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1553 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
1555 memcpy(rbuf
+ num
, "ATA ", 8);
1557 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1558 ATA_ID_PROD_OFS
, ata_model_byte_len
);
1559 num
+= ata_model_byte_len
;
1560 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1561 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1562 num
+= ATA_SERNO_LEN
;
1564 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
1569 * ata_scsiop_noop - Command handler that simply returns success.
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 * No operation. Simply returns success to caller, to indicate
1575 * that the caller should successfully complete this SCSI command.
1578 * spin_lock_irqsave(host_set lock)
1581 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1582 unsigned int buflen
)
1589 * ata_msense_push - Push data onto MODE SENSE data output buffer
1590 * @ptr_io: (input/output) Location to store more output data
1591 * @last: End of output data buffer
1592 * @buf: Pointer to BLOB being added to output buffer
1593 * @buflen: Length of BLOB
1595 * Store MODE SENSE data on an output buffer.
1601 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1602 const u8
*buf
, unsigned int buflen
)
1606 if ((ptr
+ buflen
- 1) > last
)
1609 memcpy(ptr
, buf
, buflen
);
1617 * ata_msense_caching - Simulate MODE SENSE caching info page
1618 * @id: device IDENTIFY data
1619 * @ptr_io: (input/output) Location to store more output data
1620 * @last: End of output data buffer
1622 * Generate a caching info page, which conditionally indicates
1623 * write caching to the SCSI layer, depending on device
1630 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1633 u8 page
[CACHE_MPAGE_LEN
];
1635 memcpy(page
, def_cache_mpage
, sizeof(page
));
1636 if (ata_id_wcache_enabled(id
))
1637 page
[2] |= (1 << 2); /* write cache enable */
1638 if (!ata_id_rahead_enabled(id
))
1639 page
[12] |= (1 << 5); /* disable read ahead */
1641 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1642 return sizeof(page
);
1646 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1647 * @dev: Device associated with this MODE SENSE command
1648 * @ptr_io: (input/output) Location to store more output data
1649 * @last: End of output data buffer
1651 * Generate a generic MODE SENSE control mode page.
1657 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1659 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1660 sizeof(def_control_mpage
));
1661 return sizeof(def_control_mpage
);
1665 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1666 * @dev: Device associated with this MODE SENSE command
1667 * @ptr_io: (input/output) Location to store more output data
1668 * @last: End of output data buffer
1670 * Generate a generic MODE SENSE r/w error recovery page.
1676 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1679 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1680 sizeof(def_rw_recovery_mpage
));
1681 return sizeof(def_rw_recovery_mpage
);
1685 * We can turn this into a real blacklist if it's needed, for now just
1686 * blacklist any Maxtor BANC1G10 revision firmware
1688 static int ata_dev_supports_fua(u16
*id
)
1690 unsigned char model
[41], fw
[9];
1694 if (!ata_id_has_fua(id
))
1697 ata_id_c_string(id
, model
, ATA_ID_PROD_OFS
, sizeof(model
));
1698 ata_id_c_string(id
, fw
, ATA_ID_FW_REV_OFS
, sizeof(fw
));
1700 if (strcmp(model
, "Maxtor"))
1702 if (strcmp(fw
, "BANC1G10"))
1705 return 0; /* blacklisted */
1709 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1710 * @args: device IDENTIFY data / SCSI command of interest.
1711 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1712 * @buflen: Response buffer length.
1714 * Simulate MODE SENSE commands. Assume this is invoked for direct
1715 * access devices (e.g. disks) only. There should be no block
1716 * descriptor for other device types.
1719 * spin_lock_irqsave(host_set lock)
1722 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1723 unsigned int buflen
)
1725 struct ata_device
*dev
= args
->dev
;
1726 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1727 const u8 sat_blk_desc
[] = {
1728 0, 0, 0, 0, /* number of blocks: sat unspecified */
1730 0, 0x2, 0x0 /* block length: 512 bytes */
1733 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1738 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1739 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1741 * LLBA bit in msense(10) ignored (compliant)
1744 page_control
= scsicmd
[2] >> 6;
1745 switch (page_control
) {
1746 case 0: /* current */
1747 break; /* supported */
1749 goto saving_not_supp
;
1750 case 1: /* changeable */
1751 case 2: /* defaults */
1757 output_len
= 4 + (ebd
? 8 : 0);
1758 alloc_len
= scsicmd
[4];
1760 output_len
= 8 + (ebd
? 8 : 0);
1761 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1763 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1765 p
= rbuf
+ output_len
;
1766 last
= rbuf
+ minlen
- 1;
1768 pg
= scsicmd
[2] & 0x3f;
1771 * No mode subpages supported (yet) but asking for _all_
1772 * subpages may be valid
1774 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
1778 case RW_RECOVERY_MPAGE
:
1779 output_len
+= ata_msense_rw_recovery(&p
, last
);
1783 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1786 case CONTROL_MPAGE
: {
1787 output_len
+= ata_msense_ctl_mode(&p
, last
);
1792 output_len
+= ata_msense_rw_recovery(&p
, last
);
1793 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1794 output_len
+= ata_msense_ctl_mode(&p
, last
);
1797 default: /* invalid page code */
1805 if (ata_dev_supports_fua(args
->id
) && dev
->flags
& ATA_DFLAG_LBA48
&&
1806 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
1811 rbuf
[0] = output_len
;
1816 rbuf
[3] = sizeof(sat_blk_desc
);
1818 memcpy(rbuf
+ 4, sat_blk_desc
,
1819 sizeof(sat_blk_desc
));
1823 rbuf
[0] = output_len
>> 8;
1825 rbuf
[1] = output_len
;
1830 rbuf
[7] = sizeof(sat_blk_desc
);
1832 memcpy(rbuf
+ 8, sat_blk_desc
,
1833 sizeof(sat_blk_desc
));
1839 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1840 /* "Invalid field in cbd" */
1844 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
1845 /* "Saving parameters not supported" */
1850 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1851 * @args: device IDENTIFY data / SCSI command of interest.
1852 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1853 * @buflen: Response buffer length.
1855 * Simulate READ CAPACITY commands.
1858 * spin_lock_irqsave(host_set lock)
1861 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1862 unsigned int buflen
)
1869 if (ata_id_has_lba(args
->id
)) {
1870 if (ata_id_has_lba48(args
->id
))
1871 n_sectors
= ata_id_u64(args
->id
, 100);
1873 n_sectors
= ata_id_u32(args
->id
, 60);
1875 /* CHS default translation */
1876 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1878 if (ata_id_current_chs_valid(args
->id
))
1879 /* CHS current translation */
1880 n_sectors
= ata_id_u32(args
->id
, 57);
1883 n_sectors
--; /* ATA TotalUserSectors - 1 */
1885 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1886 if( n_sectors
>= 0xffffffffULL
)
1887 tmp
= 0xffffffff ; /* Return max count on overflow */
1891 /* sector count, 32-bit */
1892 rbuf
[0] = tmp
>> (8 * 3);
1893 rbuf
[1] = tmp
>> (8 * 2);
1894 rbuf
[2] = tmp
>> (8 * 1);
1898 tmp
= ATA_SECT_SIZE
;
1903 /* sector count, 64-bit */
1904 tmp
= n_sectors
>> (8 * 4);
1905 rbuf
[2] = tmp
>> (8 * 3);
1906 rbuf
[3] = tmp
>> (8 * 2);
1907 rbuf
[4] = tmp
>> (8 * 1);
1910 rbuf
[6] = tmp
>> (8 * 3);
1911 rbuf
[7] = tmp
>> (8 * 2);
1912 rbuf
[8] = tmp
>> (8 * 1);
1916 tmp
= ATA_SECT_SIZE
;
1917 rbuf
[12] = tmp
>> 8;
1925 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1926 * @args: device IDENTIFY data / SCSI command of interest.
1927 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1928 * @buflen: Response buffer length.
1930 * Simulate REPORT LUNS command.
1933 * spin_lock_irqsave(host_set lock)
1936 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1937 unsigned int buflen
)
1940 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1946 * ata_scsi_set_sense - Set SCSI sense data and status
1947 * @cmd: SCSI request to be handled
1948 * @sk: SCSI-defined sense key
1949 * @asc: SCSI-defined additional sense code
1950 * @ascq: SCSI-defined additional sense code qualifier
1952 * Helper function that builds a valid fixed format, current
1953 * response code and the given sense key (sk), additional sense
1954 * code (asc) and additional sense code qualifier (ascq) with
1955 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
1956 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
1962 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
1964 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1966 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
1967 cmd
->sense_buffer
[2] = sk
;
1968 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
1969 cmd
->sense_buffer
[12] = asc
;
1970 cmd
->sense_buffer
[13] = ascq
;
1974 * ata_scsi_badcmd - End a SCSI request with an error
1975 * @cmd: SCSI request to be handled
1976 * @done: SCSI command completion function
1977 * @asc: SCSI-defined additional sense code
1978 * @ascq: SCSI-defined additional sense code qualifier
1980 * Helper function that completes a SCSI command with
1981 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1982 * and the specified additional sense codes.
1985 * spin_lock_irqsave(host_set lock)
1988 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
1991 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
1996 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
1998 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
1999 /* FIXME: not quite right; we don't want the
2000 * translation of taskfile registers into
2001 * a sense descriptors, since that's only
2002 * correct for ATA, not ATAPI
2004 ata_gen_ata_desc_sense(qc
);
2007 qc
->scsidone(qc
->scsicmd
);
2011 /* is it pointless to prefer PIO for "safety reasons"? */
2012 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2014 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2017 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2019 struct ata_port
*ap
= qc
->ap
;
2020 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2022 DPRINTK("ATAPI request sense\n");
2024 /* FIXME: is this needed? */
2025 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
2027 ap
->ops
->tf_read(ap
, &qc
->tf
);
2029 /* fill these in, for the case where they are -not- overwritten */
2030 cmd
->sense_buffer
[0] = 0x70;
2031 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2035 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
2036 qc
->dma_dir
= DMA_FROM_DEVICE
;
2038 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2039 qc
->cdb
[0] = REQUEST_SENSE
;
2040 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2042 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2043 qc
->tf
.command
= ATA_CMD_PACKET
;
2045 if (ata_pio_use_silly(ap
)) {
2046 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2047 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2049 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2050 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2051 qc
->tf
.lbah
= (8 * 1024) >> 8;
2053 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2055 qc
->complete_fn
= atapi_sense_complete
;
2062 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2064 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2065 unsigned int err_mask
= qc
->err_mask
;
2067 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2069 /* handle completion from new EH */
2070 if (unlikely(qc
->ap
->ops
->error_handler
&&
2071 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2073 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2074 /* FIXME: not quite right; we don't want the
2075 * translation of taskfile registers into a
2076 * sense descriptors, since that's only
2077 * correct for ATA, not ATAPI
2079 ata_gen_ata_desc_sense(qc
);
2082 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2088 /* successful completion or old EH failure path */
2089 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2090 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2091 atapi_request_sense(qc
);
2093 } else if (unlikely(err_mask
)) {
2094 /* FIXME: not quite right; we don't want the
2095 * translation of taskfile registers into
2096 * a sense descriptors, since that's only
2097 * correct for ATA, not ATAPI
2099 ata_gen_ata_desc_sense(qc
);
2101 u8
*scsicmd
= cmd
->cmnd
;
2103 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2105 unsigned int buflen
;
2107 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2109 /* ATAPI devices typically report zero for their SCSI version,
2110 * and sometimes deviate from the spec WRT response data
2111 * format. If SCSI version is reported as zero like normal,
2112 * then we make the following fixups: 1) Fake MMC-5 version,
2113 * to indicate to the Linux scsi midlayer this is a modern
2114 * device. 2) Ensure response data format / ATAPI information
2115 * are always correct.
2122 ata_scsi_rbuf_put(cmd
, buf
);
2125 cmd
->result
= SAM_STAT_GOOD
;
2132 * atapi_xlat - Initialize PACKET taskfile
2133 * @qc: command structure to be initialized
2134 * @scsicmd: SCSI CDB associated with this PACKET command
2137 * spin_lock_irqsave(host_set lock)
2140 * Zero on success, non-zero on failure.
2143 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2145 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2146 struct ata_device
*dev
= qc
->dev
;
2147 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2148 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2151 /* Check whether ATAPI DMA is safe */
2152 if (ata_check_atapi_dma(qc
))
2155 memcpy(&qc
->cdb
, scsicmd
, dev
->cdb_len
);
2157 qc
->complete_fn
= atapi_qc_complete
;
2159 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2160 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2161 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2162 DPRINTK("direction: write\n");
2165 qc
->tf
.command
= ATA_CMD_PACKET
;
2167 /* no data, or PIO data xfer */
2168 if (using_pio
|| nodata
) {
2170 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2172 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2173 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2174 qc
->tf
.lbah
= (8 * 1024) >> 8;
2179 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2180 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2182 if (atapi_dmadir
&& (cmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2183 /* some SATA bridges need us to indicate data xfer direction */
2184 qc
->tf
.feature
|= ATAPI_DMADIR
;
2187 qc
->nbytes
= cmd
->bufflen
;
2193 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2194 * @ap: ATA port to which the device is attached
2195 * @scsidev: SCSI device from which we derive the ATA device
2197 * Given various information provided in struct scsi_cmnd,
2198 * map that onto an ATA bus, and using that mapping
2199 * determine which ata_device is associated with the
2200 * SCSI command to be sent.
2203 * spin_lock_irqsave(host_set lock)
2206 * Associated ATA device, or %NULL if not found.
2209 static struct ata_device
*
2210 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2212 struct ata_device
*dev
;
2214 /* skip commands not addressed to targets we simulate */
2215 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
2216 dev
= &ap
->device
[scsidev
->id
];
2220 if (unlikely((scsidev
->channel
!= 0) ||
2221 (scsidev
->lun
!= 0)))
2224 if (unlikely(!ata_dev_enabled(dev
)))
2227 if (!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2228 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2229 ata_dev_printk(dev
, KERN_WARNING
,
2230 "WARNING: ATAPI is %s, device ignored.\n",
2231 atapi_enabled
? "not supported with this driver" : "disabled");
2240 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2241 * @byte1: Byte 1 from pass-thru CDB.
2244 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2247 ata_scsi_map_proto(u8 byte1
)
2249 switch((byte1
& 0x1e) >> 1) {
2250 case 3: /* Non-data */
2251 return ATA_PROT_NODATA
;
2254 return ATA_PROT_DMA
;
2256 case 4: /* PIO Data-in */
2257 case 5: /* PIO Data-out */
2258 return ATA_PROT_PIO
;
2260 case 10: /* Device Reset */
2261 case 0: /* Hard Reset */
2263 case 2: /* Bus Idle */
2264 case 7: /* Packet */
2265 case 8: /* DMA Queued */
2266 case 9: /* Device Diagnostic */
2267 case 11: /* UDMA Data-in */
2268 case 12: /* UDMA Data-Out */
2269 case 13: /* FPDMA */
2270 default: /* Reserved */
2274 return ATA_PROT_UNKNOWN
;
2278 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2279 * @qc: command structure to be initialized
2280 * @scsicmd: SCSI command to convert
2282 * Handles either 12 or 16-byte versions of the CDB.
2285 * Zero on success, non-zero on failure.
2288 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2290 struct ata_taskfile
*tf
= &(qc
->tf
);
2291 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2293 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2296 if (scsicmd
[1] & 0xe0)
2297 /* PIO multi not supported yet */
2301 * 12 and 16 byte CDBs use different offsets to
2302 * provide the various register values.
2304 if (scsicmd
[0] == ATA_16
) {
2306 * 16-byte CDB - may contain extended commands.
2308 * If that is the case, copy the upper byte register values.
2310 if (scsicmd
[1] & 0x01) {
2311 tf
->hob_feature
= scsicmd
[3];
2312 tf
->hob_nsect
= scsicmd
[5];
2313 tf
->hob_lbal
= scsicmd
[7];
2314 tf
->hob_lbam
= scsicmd
[9];
2315 tf
->hob_lbah
= scsicmd
[11];
2316 tf
->flags
|= ATA_TFLAG_LBA48
;
2318 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2321 * Always copy low byte, device and command registers.
2323 tf
->feature
= scsicmd
[4];
2324 tf
->nsect
= scsicmd
[6];
2325 tf
->lbal
= scsicmd
[8];
2326 tf
->lbam
= scsicmd
[10];
2327 tf
->lbah
= scsicmd
[12];
2328 tf
->device
= scsicmd
[13];
2329 tf
->command
= scsicmd
[14];
2332 * 12-byte CDB - incapable of extended commands.
2334 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2336 tf
->feature
= scsicmd
[3];
2337 tf
->nsect
= scsicmd
[4];
2338 tf
->lbal
= scsicmd
[5];
2339 tf
->lbam
= scsicmd
[6];
2340 tf
->lbah
= scsicmd
[7];
2341 tf
->device
= scsicmd
[8];
2342 tf
->command
= scsicmd
[9];
2345 * If slave is possible, enforce correct master/slave bit
2347 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2348 tf
->device
= qc
->dev
->devno
?
2349 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2352 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2353 * SET_FEATURES - XFER MODE must be preceded/succeeded
2354 * by an update to hardware-specific registers for each
2355 * controller (i.e. the reason for ->set_piomode(),
2356 * ->set_dmamode(), and ->post_set_mode() hooks).
2358 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2359 && (tf
->feature
== SETFEATURES_XFER
))
2363 * Set flags so that all registers will be written,
2364 * and pass on write indication (used for PIO/DMA
2367 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2369 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2370 tf
->flags
|= ATA_TFLAG_WRITE
;
2373 * Set transfer length.
2375 * TODO: find out if we need to do more here to
2376 * cover scatter/gather case.
2378 qc
->nsect
= cmd
->bufflen
/ ATA_SECT_SIZE
;
2380 /* request result TF */
2381 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
2386 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2387 /* "Invalid field in cdb" */
2392 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2394 * @cmd: SCSI command opcode to consider
2396 * Look up the SCSI command given, and determine whether the
2397 * SCSI command is to be translated or simulated.
2400 * Pointer to translation function if possible, %NULL if not.
2403 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2413 return ata_scsi_rw_xlat
;
2415 case SYNCHRONIZE_CACHE
:
2416 if (ata_try_flush_cache(dev
))
2417 return ata_scsi_flush_xlat
;
2422 return ata_scsi_verify_xlat
;
2426 return ata_scsi_pass_thru
;
2429 return ata_scsi_start_stop_xlat
;
2436 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2437 * @ap: ATA port to which the command was being sent
2438 * @cmd: SCSI command to dump
2440 * Prints the contents of a SCSI command via printk().
2443 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2444 struct scsi_cmnd
*cmd
)
2447 struct scsi_device
*scsidev
= cmd
->device
;
2448 u8
*scsicmd
= cmd
->cmnd
;
2450 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2452 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2453 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2454 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2459 static inline void __ata_scsi_queuecmd(struct scsi_cmnd
*cmd
,
2460 void (*done
)(struct scsi_cmnd
*),
2461 struct ata_device
*dev
)
2463 if (dev
->class == ATA_DEV_ATA
) {
2464 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2468 ata_scsi_translate(dev
, cmd
, done
, xlat_func
);
2470 ata_scsi_simulate(dev
, cmd
, done
);
2472 ata_scsi_translate(dev
, cmd
, done
, atapi_xlat
);
2476 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2477 * @cmd: SCSI command to be sent
2478 * @done: Completion function, called when command is complete
2480 * In some cases, this function translates SCSI commands into
2481 * ATA taskfiles, and queues the taskfiles to be sent to
2482 * hardware. In other cases, this function simulates a
2483 * SCSI device by evaluating and responding to certain
2484 * SCSI commands. This creates the overall effect of
2485 * ATA and ATAPI devices appearing as SCSI devices.
2488 * Releases scsi-layer-held lock, and obtains host_set lock.
2494 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2496 struct ata_port
*ap
;
2497 struct ata_device
*dev
;
2498 struct scsi_device
*scsidev
= cmd
->device
;
2499 struct Scsi_Host
*shost
= scsidev
->host
;
2501 ap
= ata_shost_to_port(shost
);
2503 spin_unlock(shost
->host_lock
);
2504 spin_lock(&ap
->host_set
->lock
);
2506 ata_scsi_dump_cdb(ap
, cmd
);
2508 dev
= ata_scsi_find_dev(ap
, scsidev
);
2510 __ata_scsi_queuecmd(cmd
, done
, dev
);
2512 cmd
->result
= (DID_BAD_TARGET
<< 16);
2516 spin_unlock(&ap
->host_set
->lock
);
2517 spin_lock(shost
->host_lock
);
2522 * ata_scsi_simulate - simulate SCSI command on ATA device
2523 * @dev: the target device
2524 * @cmd: SCSI command being sent to device.
2525 * @done: SCSI command completion function.
2527 * Interprets and directly executes a select list of SCSI commands
2528 * that can be handled internally.
2531 * spin_lock_irqsave(host_set lock)
2534 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
2535 void (*done
)(struct scsi_cmnd
*))
2537 struct ata_scsi_args args
;
2538 const u8
*scsicmd
= cmd
->cmnd
;
2545 switch(scsicmd
[0]) {
2546 /* no-op's, complete with success */
2547 case SYNCHRONIZE_CACHE
:
2551 case TEST_UNIT_READY
:
2552 case FORMAT_UNIT
: /* FIXME: correct? */
2553 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2554 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2558 if (scsicmd
[1] & 2) /* is CmdDt set? */
2559 ata_scsi_invalid_field(cmd
, done
);
2560 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2561 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2562 else if (scsicmd
[2] == 0x00)
2563 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2564 else if (scsicmd
[2] == 0x80)
2565 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2566 else if (scsicmd
[2] == 0x83)
2567 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2569 ata_scsi_invalid_field(cmd
, done
);
2574 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2577 case MODE_SELECT
: /* unconditionally return */
2578 case MODE_SELECT_10
: /* bad-field-in-cdb */
2579 ata_scsi_invalid_field(cmd
, done
);
2583 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2586 case SERVICE_ACTION_IN
:
2587 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2588 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2590 ata_scsi_invalid_field(cmd
, done
);
2594 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2597 /* mandatory commands we haven't implemented yet */
2600 /* all other commands */
2602 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2603 /* "Invalid command operation code" */
2609 void ata_scsi_scan_host(struct ata_port
*ap
)
2611 struct ata_device
*dev
;
2614 if (ap
->flags
& ATA_FLAG_DISABLED
)
2617 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2618 dev
= &ap
->device
[i
];
2620 if (ata_dev_enabled(dev
))
2621 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);
2626 * ata_schedule_scsi_eh - schedule EH for SCSI host
2627 * @shost: SCSI host to invoke error handling on.
2629 * Schedule SCSI EH without scmd. This is a hack.
2632 * spin_lock_irqsave(host_set lock)
2634 void ata_schedule_scsi_eh(struct Scsi_Host
*shost
)
2636 unsigned long flags
;
2638 spin_lock_irqsave(shost
->host_lock
, flags
);
2640 if (scsi_host_set_state(shost
, SHOST_RECOVERY
) == 0 ||
2641 scsi_host_set_state(shost
, SHOST_CANCEL_RECOVERY
) == 0) {
2642 shost
->host_eh_scheduled
++;
2643 scsi_eh_wakeup(shost
);
2646 spin_unlock_irqrestore(shost
->host_lock
, flags
);