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_device.h>
42 #include <scsi/scsi_request.h>
43 #include <linux/libata.h>
44 #include <linux/hdreg.h>
45 #include <asm/uaccess.h>
49 #define SECTOR_SIZE 512
51 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
, const u8
*scsicmd
);
52 static struct ata_device
*
53 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
);
55 #define RW_RECOVERY_MPAGE 0x1
56 #define RW_RECOVERY_MPAGE_LEN 12
57 #define CACHE_MPAGE 0x8
58 #define CACHE_MPAGE_LEN 20
59 #define CONTROL_MPAGE 0xa
60 #define CONTROL_MPAGE_LEN 12
61 #define ALL_MPAGES 0x3f
62 #define ALL_SUB_MPAGES 0xff
65 static const u8 def_rw_recovery_mpage
[] = {
67 RW_RECOVERY_MPAGE_LEN
- 2,
68 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
69 (1 << 6), /* ARRE (auto read reallocation) */
70 0, /* read retry count */
72 0, /* write retry count */
76 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
79 0, /* contains WCE, needs to be 0 for logic */
80 0, 0, 0, 0, 0, 0, 0, 0, 0,
81 0, /* contains DRA, needs to be 0 for logic */
85 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
87 CONTROL_MPAGE_LEN
- 2,
88 2, /* DSENSE=0, GLTSD=1 */
89 0, /* [QAM+QERR may be 1, see 05-359r1] */
90 0, 0, 0, 0, 0xff, 0xff,
91 0, 30 /* extended self test time, see 05-359r1 */
95 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
96 void (*done
)(struct scsi_cmnd
*))
98 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
99 /* "Invalid field in cbd" */
104 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
105 * @sdev: SCSI device for which BIOS geometry is to be determined
106 * @bdev: block device associated with @sdev
107 * @capacity: capacity of SCSI device
108 * @geom: location to which geometry will be output
110 * Generic bios head/sector/cylinder calculator
111 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
112 * mapping. Some situations may arise where the disk is not
113 * bootable if this is not used.
116 * Defined by the SCSI layer. We don't really care.
121 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
122 sector_t capacity
, int geom
[])
126 sector_div(capacity
, 255*63);
133 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
134 * @scsidev: Device to which we are issuing command
135 * @arg: User provided data for issuing command
138 * Defined by the SCSI layer. We don't really care.
141 * Zero on success, negative errno on error.
144 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
147 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
148 u8 args
[4], *argbuf
= NULL
;
150 struct scsi_request
*sreq
;
152 if (NULL
== (void *)arg
)
155 if (copy_from_user(args
, arg
, sizeof(args
)))
158 sreq
= scsi_allocate_request(scsidev
, GFP_KERNEL
);
162 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
165 argsize
= SECTOR_SIZE
* args
[3];
166 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
167 if (argbuf
== NULL
) {
172 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
173 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
174 block count in sector count field */
175 sreq
->sr_data_direction
= DMA_FROM_DEVICE
;
177 scsi_cmd
[1] = (3 << 1); /* Non-data */
178 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
179 sreq
->sr_data_direction
= DMA_NONE
;
182 scsi_cmd
[0] = ATA_16
;
184 scsi_cmd
[4] = args
[2];
185 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
186 scsi_cmd
[6] = args
[3];
187 scsi_cmd
[8] = args
[1];
191 scsi_cmd
[6] = args
[1];
193 scsi_cmd
[14] = args
[0];
195 /* Good values for timeout and retries? Values below
196 from scsi_ioctl_send_command() for default case... */
197 scsi_wait_req(sreq
, scsi_cmd
, argbuf
, argsize
, (10*HZ
), 5);
199 if (sreq
->sr_result
) {
204 /* Need code to retrieve data from check condition? */
207 && copy_to_user((void *)(arg
+ sizeof(args
)), argbuf
, argsize
))
210 scsi_release_request(sreq
);
219 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
220 * @scsidev: Device to which we are issuing command
221 * @arg: User provided data for issuing command
224 * Defined by the SCSI layer. We don't really care.
227 * Zero on success, negative errno on error.
229 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
232 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
234 struct scsi_request
*sreq
;
236 if (NULL
== (void *)arg
)
239 if (copy_from_user(args
, arg
, sizeof(args
)))
242 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
243 scsi_cmd
[0] = ATA_16
;
244 scsi_cmd
[1] = (3 << 1); /* Non-data */
245 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
246 scsi_cmd
[4] = args
[1];
247 scsi_cmd
[6] = args
[2];
248 scsi_cmd
[8] = args
[3];
249 scsi_cmd
[10] = args
[4];
250 scsi_cmd
[12] = args
[5];
251 scsi_cmd
[14] = args
[0];
253 sreq
= scsi_allocate_request(scsidev
, GFP_KERNEL
);
259 sreq
->sr_data_direction
= DMA_NONE
;
260 /* Good values for timeout and retries? Values below
261 from scsi_ioctl_send_command() for default case... */
262 scsi_wait_req(sreq
, scsi_cmd
, NULL
, 0, (10*HZ
), 5);
264 if (sreq
->sr_result
) {
269 /* Need code to retrieve data from check condition? */
272 scsi_release_request(sreq
);
276 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
279 struct ata_device
*dev
;
280 int val
= -EINVAL
, rc
= -EINVAL
;
282 ap
= (struct ata_port
*) &scsidev
->host
->hostdata
[0];
286 dev
= ata_scsi_find_dev(ap
, scsidev
);
293 case ATA_IOC_GET_IO32
:
295 if (copy_to_user(arg
, &val
, 1))
299 case ATA_IOC_SET_IO32
:
300 val
= (unsigned long) arg
;
306 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
308 return ata_cmd_ioctl(scsidev
, arg
);
310 case HDIO_DRIVE_TASK
:
311 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
313 return ata_task_ioctl(scsidev
, arg
);
325 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
326 * @ap: ATA port to which the new command is attached
327 * @dev: ATA device to which the new command is attached
328 * @cmd: SCSI command that originated this ATA command
329 * @done: SCSI command completion function
331 * Obtain a reference to an unused ata_queued_cmd structure,
332 * which is the basic libata structure representing a single
333 * ATA command sent to the hardware.
335 * If a command was available, fill in the SCSI-specific
336 * portions of the structure with information on the
340 * spin_lock_irqsave(host_set lock)
343 * Command allocated, or %NULL if none available.
345 struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_port
*ap
,
346 struct ata_device
*dev
,
347 struct scsi_cmnd
*cmd
,
348 void (*done
)(struct scsi_cmnd
*))
350 struct ata_queued_cmd
*qc
;
352 qc
= ata_qc_new_init(ap
, dev
);
358 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
359 qc
->n_elem
= cmd
->use_sg
;
361 qc
->__sg
= &qc
->sgent
;
365 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
373 * ata_dump_status - user friendly display of error info
374 * @id: id of the port in question
375 * @tf: ptr to filled out taskfile
377 * Decode and dump the ATA error/status registers for the user so
378 * that they have some idea what really happened at the non
379 * make-believe layer.
382 * inherited from caller
384 void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
386 u8 stat
= tf
->command
, err
= tf
->feature
;
388 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
389 if (stat
& ATA_BUSY
) {
390 printk("Busy }\n"); /* Data is not valid in this case */
392 if (stat
& 0x40) printk("DriveReady ");
393 if (stat
& 0x20) printk("DeviceFault ");
394 if (stat
& 0x10) printk("SeekComplete ");
395 if (stat
& 0x08) printk("DataRequest ");
396 if (stat
& 0x04) printk("CorrectedError ");
397 if (stat
& 0x02) printk("Index ");
398 if (stat
& 0x01) printk("Error ");
402 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
403 if (err
& 0x04) printk("DriveStatusError ");
405 if (err
& 0x04) printk("BadCRC ");
406 else printk("Sector ");
408 if (err
& 0x40) printk("UncorrectableError ");
409 if (err
& 0x10) printk("SectorIdNotFound ");
410 if (err
& 0x02) printk("TrackZeroNotFound ");
411 if (err
& 0x01) printk("AddrMarkNotFound ");
418 * ata_to_sense_error - convert ATA error to SCSI error
419 * @id: ATA device number
420 * @drv_stat: value contained in ATA status register
421 * @drv_err: value contained in ATA error register
422 * @sk: the sense key we'll fill out
423 * @asc: the additional sense code we'll fill out
424 * @ascq: the additional sense code qualifier we'll fill out
426 * Converts an ATA error into a SCSI error. Fill out pointers to
427 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
428 * format sense blocks.
431 * spin_lock_irqsave(host_set lock)
433 void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
, u8
*asc
,
438 /* Based on the 3ware driver translation table */
439 static unsigned char sense_table
[][4] = {
441 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
443 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
445 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
446 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
447 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
448 /* MC|ID|ABRT|TRK0|MARK */
449 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
451 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
452 /* Bad address mark */
453 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
455 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
457 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
458 /* Media change request */
459 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
461 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
463 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
465 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
466 /* BBD - block marked bad */
467 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
468 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
470 static unsigned char stat_table
[][4] = {
471 /* Must be first because BUSY means no other bits valid */
472 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
473 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
474 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
475 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
476 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
480 * Is this an error we can process/parse
482 if (drv_stat
& ATA_BUSY
) {
483 drv_err
= 0; /* Ignore the err bits, they're invalid */
487 /* Look for drv_err */
488 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
489 /* Look for best matches first */
490 if ((sense_table
[i
][0] & drv_err
) ==
492 *sk
= sense_table
[i
][1];
493 *asc
= sense_table
[i
][2];
494 *ascq
= sense_table
[i
][3];
498 /* No immediate match */
499 printk(KERN_WARNING
"ata%u: no sense translation for "
500 "error 0x%02x\n", id
, drv_err
);
503 /* Fall back to interpreting status bits */
504 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
505 if (stat_table
[i
][0] & drv_stat
) {
506 *sk
= stat_table
[i
][1];
507 *asc
= stat_table
[i
][2];
508 *ascq
= stat_table
[i
][3];
512 /* No error? Undecoded? */
513 printk(KERN_WARNING
"ata%u: no sense translation for status: 0x%02x\n",
516 /* For our last chance pick, use medium read error because
517 * it's much more common than an ATA drive telling you a write
521 *asc
= 0x11; /* "unrecovered read error" */
522 *ascq
= 0x04; /* "auto-reallocation failed" */
525 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x to "
526 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id
, drv_stat
, drv_err
,
532 * ata_gen_ata_desc_sense - Generate check condition sense block.
533 * @qc: Command that completed.
535 * This function is specific to the ATA descriptor format sense
536 * block specified for the ATA pass through commands. Regardless
537 * of whether the command errored or not, return a sense
538 * block. Copy all controller registers into the sense
539 * block. Clear sense key, ASC & ASCQ if there is no error.
542 * spin_lock_irqsave(host_set lock)
544 void ata_gen_ata_desc_sense(struct ata_queued_cmd
*qc
)
546 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
547 struct ata_taskfile
*tf
= &qc
->tf
;
548 unsigned char *sb
= cmd
->sense_buffer
;
549 unsigned char *desc
= sb
+ 8;
551 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
553 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
556 * Read the controller registers.
558 assert(NULL
!= qc
->ap
->ops
->tf_read
);
559 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
562 * Use ata_to_sense_error() to map status register bits
563 * onto sense key, asc & ascq.
565 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
566 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
567 &sb
[1], &sb
[2], &sb
[3]);
572 * Sense data is current and format is descriptor.
579 * Set length of additional sense data.
580 * Since we only populate descriptor 0, the total
581 * length is the same (fixed) length as descriptor 0.
583 desc
[1] = sb
[7] = 14;
586 * Copy registers into sense buffer.
589 desc
[3] = tf
->feature
; /* == error reg */
594 desc
[12] = tf
->device
;
595 desc
[13] = tf
->command
; /* == status reg */
598 * Fill in Extend bit, and the high order bytes
601 if (tf
->flags
& ATA_TFLAG_LBA48
) {
603 desc
[4] = tf
->hob_nsect
;
604 desc
[6] = tf
->hob_lbal
;
605 desc
[8] = tf
->hob_lbam
;
606 desc
[10] = tf
->hob_lbah
;
611 * ata_gen_fixed_sense - generate a SCSI fixed sense block
612 * @qc: Command that we are erroring out
614 * Leverage ata_to_sense_error() to give us the codes. Fit our
615 * LBA in here if there's room.
618 * inherited from caller
620 void ata_gen_fixed_sense(struct ata_queued_cmd
*qc
)
622 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
623 struct ata_taskfile
*tf
= &qc
->tf
;
624 unsigned char *sb
= cmd
->sense_buffer
;
626 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
628 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
631 * Read the controller registers.
633 assert(NULL
!= qc
->ap
->ops
->tf_read
);
634 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
637 * Use ata_to_sense_error() to map status register bits
638 * onto sense key, asc & ascq.
640 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
641 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
642 &sb
[2], &sb
[12], &sb
[13]);
649 if (tf
->flags
& ATA_TFLAG_LBA48
) {
650 /* TODO: find solution for LBA48 descriptors */
653 else if (tf
->flags
& ATA_TFLAG_LBA
) {
654 /* A small (28b) LBA will fit in the 32b info field */
655 sb
[0] |= 0x80; /* set valid bit */
656 sb
[3] = tf
->device
& 0x0f;
668 * ata_scsi_slave_config - Set SCSI device attributes
669 * @sdev: SCSI device to examine
671 * This is called before we actually start reading
672 * and writing to the device, to configure certain
673 * SCSI mid-layer behaviors.
676 * Defined by SCSI layer. We don't really care.
679 int ata_scsi_slave_config(struct scsi_device
*sdev
)
681 sdev
->use_10_for_rw
= 1;
682 sdev
->use_10_for_ms
= 1;
684 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
686 if (sdev
->id
< ATA_MAX_DEVICES
) {
688 struct ata_device
*dev
;
690 ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
691 dev
= &ap
->device
[sdev
->id
];
693 /* TODO: 1024 is an arbitrary number, not the
694 * hardware maximum. This should be increased to
695 * 65534 when Jens Axboe's patch for dynamically
696 * determining max_sectors is merged.
698 if ((dev
->flags
& ATA_DFLAG_LBA48
) &&
699 ((dev
->flags
& ATA_DFLAG_LOCK_SECTORS
) == 0)) {
701 * do not overwrite sdev->host->max_sectors, since
702 * other drives on this host may not support LBA48
704 blk_queue_max_sectors(sdev
->request_queue
, 2048);
708 * SATA DMA transfers must be multiples of 4 byte, so
709 * we need to pad ATAPI transfers using an extra sg.
710 * Decrement max hw segments accordingly.
712 if (dev
->class == ATA_DEV_ATAPI
) {
713 request_queue_t
*q
= sdev
->request_queue
;
714 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
718 return 0; /* scsi layer doesn't check return value, sigh */
722 * ata_scsi_error - SCSI layer error handler callback
723 * @host: SCSI host on which error occurred
725 * Handles SCSI-layer-thrown error events.
728 * Inherited from SCSI layer (none, can sleep)
734 int ata_scsi_error(struct Scsi_Host
*host
)
740 ap
= (struct ata_port
*) &host
->hostdata
[0];
741 ap
->ops
->eng_timeout(ap
);
743 /* TODO: this is per-command; when queueing is supported
744 * this code will either change or move to a more
748 INIT_LIST_HEAD(&host
->eh_cmd_q
);
755 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
756 * @qc: Storage for translated ATA taskfile
757 * @scsicmd: SCSI command to translate
759 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
760 * (to start). Perhaps these commands should be preceded by
761 * CHECK POWER MODE to see what power mode the device is already in.
762 * [See SAT revision 5 at www.t10.org]
765 * spin_lock_irqsave(host_set lock)
768 * Zero on success, non-zero on error.
771 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
774 struct ata_taskfile
*tf
= &qc
->tf
;
776 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
777 tf
->protocol
= ATA_PROT_NODATA
;
778 if (scsicmd
[1] & 0x1) {
779 ; /* ignore IMMED bit, violates sat-r05 */
781 if (scsicmd
[4] & 0x2)
782 goto invalid_fld
; /* LOEJ bit set not supported */
783 if (((scsicmd
[4] >> 4) & 0xf) != 0)
784 goto invalid_fld
; /* power conditions not supported */
785 if (scsicmd
[4] & 0x1) {
786 tf
->nsect
= 1; /* 1 sector, lba=0 */
788 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
789 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
794 tf
->device
|= ATA_LBA
;
797 tf
->lbal
= 0x1; /* sect */
798 tf
->lbam
= 0x0; /* cyl low */
799 tf
->lbah
= 0x0; /* cyl high */
802 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
804 tf
->nsect
= 0; /* time period value (0 implies now) */
805 tf
->command
= ATA_CMD_STANDBY
;
806 /* Consider: ATA STANDBY IMMEDIATE command */
809 * Standby and Idle condition timers could be implemented but that
810 * would require libata to implement the Power condition mode page
811 * and allow the user to change it. Changing mode pages requires
812 * MODE SELECT to be implemented.
818 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
819 /* "Invalid field in cbd" */
825 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
826 * @qc: Storage for translated ATA taskfile
827 * @scsicmd: SCSI command to translate (ignored)
829 * Sets up an ATA taskfile to issue FLUSH CACHE or
833 * spin_lock_irqsave(host_set lock)
836 * Zero on success, non-zero on error.
839 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
841 struct ata_taskfile
*tf
= &qc
->tf
;
843 tf
->flags
|= ATA_TFLAG_DEVICE
;
844 tf
->protocol
= ATA_PROT_NODATA
;
846 if ((qc
->dev
->flags
& ATA_DFLAG_LBA48
) &&
847 (ata_id_has_flush_ext(qc
->dev
->id
)))
848 tf
->command
= ATA_CMD_FLUSH_EXT
;
850 tf
->command
= ATA_CMD_FLUSH
;
856 * scsi_6_lba_len - Get LBA and transfer length
857 * @scsicmd: SCSI command to translate
859 * Calculate LBA and transfer length for 6-byte commands.
863 * @plen: the transfer length
866 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
871 VPRINTK("six-byte command\n");
873 lba
|= ((u64
)scsicmd
[2]) << 8;
874 lba
|= ((u64
)scsicmd
[3]);
876 len
|= ((u32
)scsicmd
[4]);
883 * scsi_10_lba_len - Get LBA and transfer length
884 * @scsicmd: SCSI command to translate
886 * Calculate LBA and transfer length for 10-byte commands.
890 * @plen: the transfer length
893 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
898 VPRINTK("ten-byte command\n");
900 lba
|= ((u64
)scsicmd
[2]) << 24;
901 lba
|= ((u64
)scsicmd
[3]) << 16;
902 lba
|= ((u64
)scsicmd
[4]) << 8;
903 lba
|= ((u64
)scsicmd
[5]);
905 len
|= ((u32
)scsicmd
[7]) << 8;
906 len
|= ((u32
)scsicmd
[8]);
913 * scsi_16_lba_len - Get LBA and transfer length
914 * @scsicmd: SCSI command to translate
916 * Calculate LBA and transfer length for 16-byte commands.
920 * @plen: the transfer length
923 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
928 VPRINTK("sixteen-byte command\n");
930 lba
|= ((u64
)scsicmd
[2]) << 56;
931 lba
|= ((u64
)scsicmd
[3]) << 48;
932 lba
|= ((u64
)scsicmd
[4]) << 40;
933 lba
|= ((u64
)scsicmd
[5]) << 32;
934 lba
|= ((u64
)scsicmd
[6]) << 24;
935 lba
|= ((u64
)scsicmd
[7]) << 16;
936 lba
|= ((u64
)scsicmd
[8]) << 8;
937 lba
|= ((u64
)scsicmd
[9]);
939 len
|= ((u32
)scsicmd
[10]) << 24;
940 len
|= ((u32
)scsicmd
[11]) << 16;
941 len
|= ((u32
)scsicmd
[12]) << 8;
942 len
|= ((u32
)scsicmd
[13]);
949 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
950 * @qc: Storage for translated ATA taskfile
951 * @scsicmd: SCSI command to translate
953 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
956 * spin_lock_irqsave(host_set lock)
959 * Zero on success, non-zero on error.
962 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
964 struct ata_taskfile
*tf
= &qc
->tf
;
965 struct ata_device
*dev
= qc
->dev
;
966 u64 dev_sectors
= qc
->dev
->n_sectors
;
970 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
971 tf
->protocol
= ATA_PROT_NODATA
;
973 if (scsicmd
[0] == VERIFY
)
974 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
975 else if (scsicmd
[0] == VERIFY_16
)
976 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
982 if (block
>= dev_sectors
)
984 if ((block
+ n_block
) > dev_sectors
)
987 if (dev
->flags
& ATA_DFLAG_LBA
) {
988 tf
->flags
|= ATA_TFLAG_LBA
;
990 if (dev
->flags
& ATA_DFLAG_LBA48
) {
991 if (n_block
> (64 * 1024))
995 tf
->flags
|= ATA_TFLAG_LBA48
;
996 tf
->command
= ATA_CMD_VERIFY_EXT
;
998 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1000 tf
->hob_lbah
= (block
>> 40) & 0xff;
1001 tf
->hob_lbam
= (block
>> 32) & 0xff;
1002 tf
->hob_lbal
= (block
>> 24) & 0xff;
1008 tf
->command
= ATA_CMD_VERIFY
;
1010 tf
->device
|= (block
>> 24) & 0xf;
1013 tf
->nsect
= n_block
& 0xff;
1015 tf
->lbah
= (block
>> 16) & 0xff;
1016 tf
->lbam
= (block
>> 8) & 0xff;
1017 tf
->lbal
= block
& 0xff;
1019 tf
->device
|= ATA_LBA
;
1022 u32 sect
, head
, cyl
, track
;
1027 /* Convert LBA to CHS */
1028 track
= (u32
)block
/ dev
->sectors
;
1029 cyl
= track
/ dev
->heads
;
1030 head
= track
% dev
->heads
;
1031 sect
= (u32
)block
% dev
->sectors
+ 1;
1033 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1034 (u32
)block
, track
, cyl
, head
, sect
);
1036 /* Check whether the converted CHS can fit.
1040 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1043 tf
->command
= ATA_CMD_VERIFY
;
1044 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1047 tf
->lbah
= cyl
>> 8;
1054 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1055 /* "Invalid field in cbd" */
1059 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1060 /* "Logical Block Address out of range" */
1064 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1069 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1070 * @qc: Storage for translated ATA taskfile
1071 * @scsicmd: SCSI command to translate
1073 * Converts any of six SCSI read/write commands into the
1074 * ATA counterpart, including starting sector (LBA),
1075 * sector count, and taking into account the device's LBA48
1078 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1079 * %WRITE_16 are currently supported.
1082 * spin_lock_irqsave(host_set lock)
1085 * Zero on success, non-zero on error.
1088 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1090 struct ata_taskfile
*tf
= &qc
->tf
;
1091 struct ata_device
*dev
= qc
->dev
;
1095 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1097 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1098 scsicmd
[0] == WRITE_16
)
1099 tf
->flags
|= ATA_TFLAG_WRITE
;
1101 /* Calculate the SCSI LBA and transfer length. */
1102 switch (scsicmd
[0]) {
1105 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1109 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1111 /* for 6-byte r/w commands, transfer length 0
1112 * means 256 blocks of data, not 0 block.
1119 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1122 DPRINTK("no-byte command\n");
1126 /* Check and compose ATA command */
1128 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1129 * length 0 means transfer 0 block of data.
1130 * However, for ATA R/W commands, sector count 0 means
1131 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1135 if (dev
->flags
& ATA_DFLAG_LBA
) {
1136 tf
->flags
|= ATA_TFLAG_LBA
;
1138 if (dev
->flags
& ATA_DFLAG_LBA48
) {
1139 /* The request -may- be too large for LBA48. */
1140 if ((block
>> 48) || (n_block
> 65536))
1144 tf
->flags
|= ATA_TFLAG_LBA48
;
1146 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1148 tf
->hob_lbah
= (block
>> 40) & 0xff;
1149 tf
->hob_lbam
= (block
>> 32) & 0xff;
1150 tf
->hob_lbal
= (block
>> 24) & 0xff;
1154 /* The request -may- be too large for LBA28. */
1155 if ((block
>> 28) || (n_block
> 256))
1158 tf
->device
|= (block
>> 24) & 0xf;
1161 ata_rwcmd_protocol(qc
);
1163 qc
->nsect
= n_block
;
1164 tf
->nsect
= n_block
& 0xff;
1166 tf
->lbah
= (block
>> 16) & 0xff;
1167 tf
->lbam
= (block
>> 8) & 0xff;
1168 tf
->lbal
= block
& 0xff;
1170 tf
->device
|= ATA_LBA
;
1173 u32 sect
, head
, cyl
, track
;
1175 /* The request -may- be too large for CHS addressing. */
1176 if ((block
>> 28) || (n_block
> 256))
1179 ata_rwcmd_protocol(qc
);
1181 /* Convert LBA to CHS */
1182 track
= (u32
)block
/ dev
->sectors
;
1183 cyl
= track
/ dev
->heads
;
1184 head
= track
% dev
->heads
;
1185 sect
= (u32
)block
% dev
->sectors
+ 1;
1187 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1188 (u32
)block
, track
, cyl
, head
, sect
);
1190 /* Check whether the converted CHS can fit.
1194 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1197 qc
->nsect
= n_block
;
1198 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1201 tf
->lbah
= cyl
>> 8;
1208 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1209 /* "Invalid field in cbd" */
1213 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1214 /* "Logical Block Address out of range" */
1218 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1222 static int ata_scsi_qc_complete(struct ata_queued_cmd
*qc
,
1223 unsigned int err_mask
)
1225 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1226 u8
*cdb
= cmd
->cmnd
;
1227 int need_sense
= (err_mask
!= 0);
1229 /* For ATA pass thru (SAT) commands, generate a sense block if
1230 * user mandated it or if there's an error. Note that if we
1231 * generate because the user forced us to, a check condition
1232 * is generated and the ATA register values are returned
1233 * whether the command completed successfully or not. If there
1234 * was no error, SK, ASC and ASCQ will all be zero.
1236 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1237 ((cdb
[2] & 0x20) || need_sense
)) {
1238 ata_gen_ata_desc_sense(qc
);
1241 cmd
->result
= SAM_STAT_GOOD
;
1243 /* TODO: decide which descriptor format to use
1244 * for 48b LBA devices and call that here
1245 * instead of the fixed desc, which is only
1246 * good for smaller LBA (and maybe CHS?)
1249 ata_gen_fixed_sense(qc
);
1254 /* The ata_gen_..._sense routines fill in tf */
1255 ata_dump_status(qc
->ap
->id
, &qc
->tf
);
1264 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1265 * @ap: ATA port to which the command is addressed
1266 * @dev: ATA device to which the command is addressed
1267 * @cmd: SCSI command to execute
1268 * @done: SCSI command completion function
1269 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1271 * Our ->queuecommand() function has decided that the SCSI
1272 * command issued can be directly translated into an ATA
1273 * command, rather than handled internally.
1275 * This function sets up an ata_queued_cmd structure for the
1276 * SCSI command, and sends that ata_queued_cmd to the hardware.
1278 * The xlat_func argument (actor) returns 0 if ready to execute
1279 * ATA command, else 1 to finish translation. If 1 is returned
1280 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1281 * to be set reflecting an error condition or clean (early)
1285 * spin_lock_irqsave(host_set lock)
1288 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
1289 struct scsi_cmnd
*cmd
,
1290 void (*done
)(struct scsi_cmnd
*),
1291 ata_xlat_func_t xlat_func
)
1293 struct ata_queued_cmd
*qc
;
1294 u8
*scsicmd
= cmd
->cmnd
;
1298 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
1302 /* data is present; dma-map it */
1303 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1304 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1305 if (unlikely(cmd
->request_bufflen
< 1)) {
1306 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
1307 ap
->id
, dev
->devno
);
1312 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1314 ata_sg_init_one(qc
, cmd
->request_buffer
,
1315 cmd
->request_bufflen
);
1317 qc
->dma_dir
= cmd
->sc_data_direction
;
1320 qc
->complete_fn
= ata_scsi_qc_complete
;
1322 if (xlat_func(qc
, scsicmd
))
1325 /* select device, send command to hardware */
1326 if (ata_qc_issue(qc
))
1335 DPRINTK("EXIT - early finish (good or error)\n");
1341 cmd
->result
= (DID_ERROR
<< 16);
1343 DPRINTK("EXIT - internal\n");
1348 * ata_scsi_rbuf_get - Map response buffer.
1349 * @cmd: SCSI command containing buffer to be mapped.
1350 * @buf_out: Pointer to mapped area.
1352 * Maps buffer contained within SCSI command @cmd.
1355 * spin_lock_irqsave(host_set lock)
1358 * Length of response buffer.
1361 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1364 unsigned int buflen
;
1367 struct scatterlist
*sg
;
1369 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1370 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1371 buflen
= sg
->length
;
1373 buf
= cmd
->request_buffer
;
1374 buflen
= cmd
->request_bufflen
;
1382 * ata_scsi_rbuf_put - Unmap response buffer.
1383 * @cmd: SCSI command containing buffer to be unmapped.
1384 * @buf: buffer to unmap
1386 * Unmaps response buffer contained within @cmd.
1389 * spin_lock_irqsave(host_set lock)
1392 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1395 struct scatterlist
*sg
;
1397 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1398 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1403 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1404 * @args: device IDENTIFY data / SCSI command of interest.
1405 * @actor: Callback hook for desired SCSI command simulator
1407 * Takes care of the hard work of simulating a SCSI command...
1408 * Mapping the response buffer, calling the command's handler,
1409 * and handling the handler's return value. This return value
1410 * indicates whether the handler wishes the SCSI command to be
1411 * completed successfully (0), or not (in which case cmd->result
1412 * and sense buffer are assumed to be set).
1415 * spin_lock_irqsave(host_set lock)
1418 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1419 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1420 u8
*rbuf
, unsigned int buflen
))
1423 unsigned int buflen
, rc
;
1424 struct scsi_cmnd
*cmd
= args
->cmd
;
1426 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1427 memset(rbuf
, 0, buflen
);
1428 rc
= actor(args
, rbuf
, buflen
);
1429 ata_scsi_rbuf_put(cmd
, rbuf
);
1432 cmd
->result
= SAM_STAT_GOOD
;
1437 * ata_scsiop_inq_std - Simulate INQUIRY command
1438 * @args: device IDENTIFY data / SCSI command of interest.
1439 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1440 * @buflen: Response buffer length.
1442 * Returns standard device identification data associated
1443 * with non-EVPD INQUIRY command output.
1446 * spin_lock_irqsave(host_set lock)
1449 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1450 unsigned int buflen
)
1455 0x5, /* claim SPC-3 version compatibility */
1460 /* set scsi removeable (RMB) bit per ata bit */
1461 if (ata_id_removeable(args
->id
))
1466 memcpy(rbuf
, hdr
, sizeof(hdr
));
1469 memcpy(&rbuf
[8], "ATA ", 8);
1470 ata_dev_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1471 ata_dev_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1472 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1473 memcpy(&rbuf
[32], "n/a ", 4);
1477 const u8 versions
[] = {
1478 0x60, /* SAM-3 (no version claimed) */
1481 0x20, /* SBC-2 (no version claimed) */
1484 0x60 /* SPC-3 (no version claimed) */
1487 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1494 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1495 * @args: device IDENTIFY data / SCSI command of interest.
1496 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1497 * @buflen: Response buffer length.
1499 * Returns list of inquiry EVPD pages available.
1502 * spin_lock_irqsave(host_set lock)
1505 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1506 unsigned int buflen
)
1508 const u8 pages
[] = {
1509 0x00, /* page 0x00, this page */
1510 0x80, /* page 0x80, unit serial no page */
1511 0x83 /* page 0x83, device ident page */
1513 rbuf
[3] = sizeof(pages
); /* number of supported EVPD pages */
1516 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1522 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1523 * @args: device IDENTIFY data / SCSI command of interest.
1524 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1525 * @buflen: Response buffer length.
1527 * Returns ATA device serial number.
1530 * spin_lock_irqsave(host_set lock)
1533 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1534 unsigned int buflen
)
1538 0x80, /* this page code */
1540 ATA_SERNO_LEN
, /* page len */
1542 memcpy(rbuf
, hdr
, sizeof(hdr
));
1544 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1545 ata_dev_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1546 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1551 static const char *inq_83_str
= "Linux ATA-SCSI simulator";
1554 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1555 * @args: device IDENTIFY data / SCSI command of interest.
1556 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1557 * @buflen: Response buffer length.
1559 * Returns device identification. Currently hardcoded to
1560 * return "Linux ATA-SCSI simulator".
1563 * spin_lock_irqsave(host_set lock)
1566 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1567 unsigned int buflen
)
1569 rbuf
[1] = 0x83; /* this page code */
1570 rbuf
[3] = 4 + strlen(inq_83_str
); /* page len */
1572 /* our one and only identification descriptor (vendor-specific) */
1573 if (buflen
> (strlen(inq_83_str
) + 4 + 4 - 1)) {
1574 rbuf
[4 + 0] = 2; /* code set: ASCII */
1575 rbuf
[4 + 3] = strlen(inq_83_str
);
1576 memcpy(rbuf
+ 4 + 4, inq_83_str
, strlen(inq_83_str
));
1583 * ata_scsiop_noop - Command handler that simply returns success.
1584 * @args: device IDENTIFY data / SCSI command of interest.
1585 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1586 * @buflen: Response buffer length.
1588 * No operation. Simply returns success to caller, to indicate
1589 * that the caller should successfully complete this SCSI command.
1592 * spin_lock_irqsave(host_set lock)
1595 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1596 unsigned int buflen
)
1603 * ata_msense_push - Push data onto MODE SENSE data output buffer
1604 * @ptr_io: (input/output) Location to store more output data
1605 * @last: End of output data buffer
1606 * @buf: Pointer to BLOB being added to output buffer
1607 * @buflen: Length of BLOB
1609 * Store MODE SENSE data on an output buffer.
1615 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1616 const u8
*buf
, unsigned int buflen
)
1620 if ((ptr
+ buflen
- 1) > last
)
1623 memcpy(ptr
, buf
, buflen
);
1631 * ata_msense_caching - Simulate MODE SENSE caching info page
1632 * @id: device IDENTIFY data
1633 * @ptr_io: (input/output) Location to store more output data
1634 * @last: End of output data buffer
1636 * Generate a caching info page, which conditionally indicates
1637 * write caching to the SCSI layer, depending on device
1644 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1647 u8 page
[CACHE_MPAGE_LEN
];
1649 memcpy(page
, def_cache_mpage
, sizeof(page
));
1650 if (ata_id_wcache_enabled(id
))
1651 page
[2] |= (1 << 2); /* write cache enable */
1652 if (!ata_id_rahead_enabled(id
))
1653 page
[12] |= (1 << 5); /* disable read ahead */
1655 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1656 return sizeof(page
);
1660 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1661 * @dev: Device associated with this MODE SENSE command
1662 * @ptr_io: (input/output) Location to store more output data
1663 * @last: End of output data buffer
1665 * Generate a generic MODE SENSE control mode page.
1671 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1673 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1674 sizeof(def_control_mpage
));
1675 return sizeof(def_control_mpage
);
1679 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1680 * @dev: Device associated with this MODE SENSE command
1681 * @ptr_io: (input/output) Location to store more output data
1682 * @last: End of output data buffer
1684 * Generate a generic MODE SENSE r/w error recovery page.
1690 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1693 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1694 sizeof(def_rw_recovery_mpage
));
1695 return sizeof(def_rw_recovery_mpage
);
1699 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1700 * @args: device IDENTIFY data / SCSI command of interest.
1701 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1702 * @buflen: Response buffer length.
1704 * Simulate MODE SENSE commands. Assume this is invoked for direct
1705 * access devices (e.g. disks) only. There should be no block
1706 * descriptor for other device types.
1709 * spin_lock_irqsave(host_set lock)
1712 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1713 unsigned int buflen
)
1715 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1716 const u8 sat_blk_desc
[] = {
1717 0, 0, 0, 0, /* number of blocks: sat unspecified */
1719 0, 0x2, 0x0 /* block length: 512 bytes */
1722 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1726 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1727 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1729 * LLBA bit in msense(10) ignored (compliant)
1732 page_control
= scsicmd
[2] >> 6;
1733 switch (page_control
) {
1734 case 0: /* current */
1735 break; /* supported */
1737 goto saving_not_supp
;
1738 case 1: /* changeable */
1739 case 2: /* defaults */
1745 output_len
= 4 + (ebd
? 8 : 0);
1746 alloc_len
= scsicmd
[4];
1748 output_len
= 8 + (ebd
? 8 : 0);
1749 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1751 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1753 p
= rbuf
+ output_len
;
1754 last
= rbuf
+ minlen
- 1;
1756 pg
= scsicmd
[2] & 0x3f;
1759 * No mode subpages supported (yet) but asking for _all_
1760 * subpages may be valid
1762 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
1766 case RW_RECOVERY_MPAGE
:
1767 output_len
+= ata_msense_rw_recovery(&p
, last
);
1771 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1774 case CONTROL_MPAGE
: {
1775 output_len
+= ata_msense_ctl_mode(&p
, last
);
1780 output_len
+= ata_msense_rw_recovery(&p
, last
);
1781 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1782 output_len
+= ata_msense_ctl_mode(&p
, last
);
1785 default: /* invalid page code */
1793 rbuf
[0] = output_len
;
1796 rbuf
[3] = sizeof(sat_blk_desc
);
1798 memcpy(rbuf
+ 4, sat_blk_desc
,
1799 sizeof(sat_blk_desc
));
1803 rbuf
[0] = output_len
>> 8;
1805 rbuf
[1] = output_len
;
1808 rbuf
[7] = sizeof(sat_blk_desc
);
1810 memcpy(rbuf
+ 8, sat_blk_desc
,
1811 sizeof(sat_blk_desc
));
1817 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1818 /* "Invalid field in cbd" */
1822 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
1823 /* "Saving parameters not supported" */
1828 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1829 * @args: device IDENTIFY data / SCSI command of interest.
1830 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1831 * @buflen: Response buffer length.
1833 * Simulate READ CAPACITY commands.
1836 * spin_lock_irqsave(host_set lock)
1839 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
1840 unsigned int buflen
)
1847 if (ata_id_has_lba(args
->id
)) {
1848 if (ata_id_has_lba48(args
->id
))
1849 n_sectors
= ata_id_u64(args
->id
, 100);
1851 n_sectors
= ata_id_u32(args
->id
, 60);
1853 /* CHS default translation */
1854 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
1856 if (ata_id_current_chs_valid(args
->id
))
1857 /* CHS current translation */
1858 n_sectors
= ata_id_u32(args
->id
, 57);
1861 n_sectors
--; /* ATA TotalUserSectors - 1 */
1863 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
1864 if( n_sectors
>= 0xffffffffULL
)
1865 tmp
= 0xffffffff ; /* Return max count on overflow */
1869 /* sector count, 32-bit */
1870 rbuf
[0] = tmp
>> (8 * 3);
1871 rbuf
[1] = tmp
>> (8 * 2);
1872 rbuf
[2] = tmp
>> (8 * 1);
1876 tmp
= ATA_SECT_SIZE
;
1881 /* sector count, 64-bit */
1882 tmp
= n_sectors
>> (8 * 4);
1883 rbuf
[2] = tmp
>> (8 * 3);
1884 rbuf
[3] = tmp
>> (8 * 2);
1885 rbuf
[4] = tmp
>> (8 * 1);
1888 rbuf
[6] = tmp
>> (8 * 3);
1889 rbuf
[7] = tmp
>> (8 * 2);
1890 rbuf
[8] = tmp
>> (8 * 1);
1894 tmp
= ATA_SECT_SIZE
;
1895 rbuf
[12] = tmp
>> 8;
1903 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1906 * @buflen: Response buffer length.
1908 * Simulate REPORT LUNS command.
1911 * spin_lock_irqsave(host_set lock)
1914 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
1915 unsigned int buflen
)
1918 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1924 * ata_scsi_set_sense - Set SCSI sense data and status
1925 * @cmd: SCSI request to be handled
1926 * @sk: SCSI-defined sense key
1927 * @asc: SCSI-defined additional sense code
1928 * @ascq: SCSI-defined additional sense code qualifier
1930 * Helper function that builds a valid fixed format, current
1931 * response code and the given sense key (sk), additional sense
1932 * code (asc) and additional sense code qualifier (ascq) with
1933 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
1934 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
1940 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
1942 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
1944 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
1945 cmd
->sense_buffer
[2] = sk
;
1946 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
1947 cmd
->sense_buffer
[12] = asc
;
1948 cmd
->sense_buffer
[13] = ascq
;
1952 * ata_scsi_badcmd - End a SCSI request with an error
1953 * @cmd: SCSI request to be handled
1954 * @done: SCSI command completion function
1955 * @asc: SCSI-defined additional sense code
1956 * @ascq: SCSI-defined additional sense code qualifier
1958 * Helper function that completes a SCSI command with
1959 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1960 * and the specified additional sense codes.
1963 * spin_lock_irqsave(host_set lock)
1966 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
1969 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
1974 void atapi_request_sense(struct ata_port
*ap
, struct ata_device
*dev
,
1975 struct scsi_cmnd
*cmd
)
1977 DECLARE_COMPLETION(wait
);
1978 struct ata_queued_cmd
*qc
;
1979 unsigned long flags
;
1982 DPRINTK("ATAPI request sense\n");
1984 qc
= ata_qc_new_init(ap
, dev
);
1987 /* FIXME: is this needed? */
1988 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
1990 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
1991 qc
->dma_dir
= DMA_FROM_DEVICE
;
1993 memset(&qc
->cdb
, 0, ap
->cdb_len
);
1994 qc
->cdb
[0] = REQUEST_SENSE
;
1995 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
1997 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1998 qc
->tf
.command
= ATA_CMD_PACKET
;
2000 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2001 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2002 qc
->tf
.lbah
= (8 * 1024) >> 8;
2003 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2005 qc
->waiting
= &wait
;
2006 qc
->complete_fn
= ata_qc_complete_noop
;
2008 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2009 rc
= ata_qc_issue(qc
);
2010 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2013 ata_port_disable(ap
);
2015 wait_for_completion(&wait
);
2020 static int atapi_qc_complete(struct ata_queued_cmd
*qc
, unsigned int err_mask
)
2022 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2024 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2026 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2027 DPRINTK("request check condition\n");
2029 /* FIXME: command completion with check condition
2030 * but no sense causes the error handler to run,
2031 * which then issues REQUEST SENSE, fills in the sense
2032 * buffer, and completes the command (for the second
2033 * time). We need to issue REQUEST SENSE some other
2034 * way, to avoid completing the command twice.
2036 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2043 else if (unlikely(err_mask
))
2044 /* FIXME: not quite right; we don't want the
2045 * translation of taskfile registers into
2046 * a sense descriptors, since that's only
2047 * correct for ATA, not ATAPI
2049 ata_gen_ata_desc_sense(qc
);
2052 u8
*scsicmd
= cmd
->cmnd
;
2054 if (scsicmd
[0] == INQUIRY
) {
2056 unsigned int buflen
;
2058 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2060 /* ATAPI devices typically report zero for their SCSI version,
2061 * and sometimes deviate from the spec WRT response data
2062 * format. If SCSI version is reported as zero like normal,
2063 * then we make the following fixups: 1) Fake MMC-5 version,
2064 * to indicate to the Linux scsi midlayer this is a modern
2065 * device. 2) Ensure response data format / ATAPI information
2066 * are always correct.
2068 /* FIXME: do we ever override EVPD pages and the like, with
2076 ata_scsi_rbuf_put(cmd
, buf
);
2079 cmd
->result
= SAM_STAT_GOOD
;
2086 * atapi_xlat - Initialize PACKET taskfile
2087 * @qc: command structure to be initialized
2088 * @scsicmd: SCSI CDB associated with this PACKET command
2091 * spin_lock_irqsave(host_set lock)
2094 * Zero on success, non-zero on failure.
2097 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2099 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2100 struct ata_device
*dev
= qc
->dev
;
2101 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2102 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2105 /* Check whether ATAPI DMA is safe */
2106 if (ata_check_atapi_dma(qc
))
2109 memcpy(&qc
->cdb
, scsicmd
, qc
->ap
->cdb_len
);
2111 qc
->complete_fn
= atapi_qc_complete
;
2113 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2114 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2115 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2116 DPRINTK("direction: write\n");
2119 qc
->tf
.command
= ATA_CMD_PACKET
;
2121 /* no data, or PIO data xfer */
2122 if (using_pio
|| nodata
) {
2124 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2126 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2127 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2128 qc
->tf
.lbah
= (8 * 1024) >> 8;
2133 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2134 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2136 #ifdef ATAPI_ENABLE_DMADIR
2137 /* some SATA bridges need us to indicate data xfer direction */
2138 if (cmd
->sc_data_direction
!= DMA_TO_DEVICE
)
2139 qc
->tf
.feature
|= ATAPI_DMADIR
;
2143 qc
->nbytes
= cmd
->bufflen
;
2149 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2150 * @ap: ATA port to which the device is attached
2151 * @scsidev: SCSI device from which we derive the ATA device
2153 * Given various information provided in struct scsi_cmnd,
2154 * map that onto an ATA bus, and using that mapping
2155 * determine which ata_device is associated with the
2156 * SCSI command to be sent.
2159 * spin_lock_irqsave(host_set lock)
2162 * Associated ATA device, or %NULL if not found.
2165 static struct ata_device
*
2166 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2168 struct ata_device
*dev
;
2170 /* skip commands not addressed to targets we simulate */
2171 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
2172 dev
= &ap
->device
[scsidev
->id
];
2176 if (unlikely((scsidev
->channel
!= 0) ||
2177 (scsidev
->lun
!= 0)))
2180 if (unlikely(!ata_dev_present(dev
)))
2183 if (!atapi_enabled
) {
2184 if (unlikely(dev
->class == ATA_DEV_ATAPI
))
2192 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2193 * @byte1: Byte 1 from pass-thru CDB.
2196 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2199 ata_scsi_map_proto(u8 byte1
)
2201 switch((byte1
& 0x1e) >> 1) {
2202 case 3: /* Non-data */
2203 return ATA_PROT_NODATA
;
2206 return ATA_PROT_DMA
;
2208 case 4: /* PIO Data-in */
2209 case 5: /* PIO Data-out */
2211 return ATA_PROT_PIO_MULT
;
2213 return ATA_PROT_PIO
;
2215 case 10: /* Device Reset */
2216 case 0: /* Hard Reset */
2218 case 2: /* Bus Idle */
2219 case 7: /* Packet */
2220 case 8: /* DMA Queued */
2221 case 9: /* Device Diagnostic */
2222 case 11: /* UDMA Data-in */
2223 case 12: /* UDMA Data-Out */
2224 case 13: /* FPDMA */
2225 default: /* Reserved */
2229 return ATA_PROT_UNKNOWN
;
2233 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2234 * @qc: command structure to be initialized
2235 * @scsicmd: SCSI command to convert
2237 * Handles either 12 or 16-byte versions of the CDB.
2240 * Zero on success, non-zero on failure.
2243 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2245 struct ata_taskfile
*tf
= &(qc
->tf
);
2246 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2248 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2252 * 12 and 16 byte CDBs use different offsets to
2253 * provide the various register values.
2255 if (scsicmd
[0] == ATA_16
) {
2257 * 16-byte CDB - may contain extended commands.
2259 * If that is the case, copy the upper byte register values.
2261 if (scsicmd
[1] & 0x01) {
2262 tf
->hob_feature
= scsicmd
[3];
2263 tf
->hob_nsect
= scsicmd
[5];
2264 tf
->hob_lbal
= scsicmd
[7];
2265 tf
->hob_lbam
= scsicmd
[9];
2266 tf
->hob_lbah
= scsicmd
[11];
2267 tf
->flags
|= ATA_TFLAG_LBA48
;
2269 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2272 * Always copy low byte, device and command registers.
2274 tf
->feature
= scsicmd
[4];
2275 tf
->nsect
= scsicmd
[6];
2276 tf
->lbal
= scsicmd
[8];
2277 tf
->lbam
= scsicmd
[10];
2278 tf
->lbah
= scsicmd
[12];
2279 tf
->device
= scsicmd
[13];
2280 tf
->command
= scsicmd
[14];
2283 * 12-byte CDB - incapable of extended commands.
2285 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2287 tf
->feature
= scsicmd
[3];
2288 tf
->nsect
= scsicmd
[4];
2289 tf
->lbal
= scsicmd
[5];
2290 tf
->lbam
= scsicmd
[6];
2291 tf
->lbah
= scsicmd
[7];
2292 tf
->device
= scsicmd
[8];
2293 tf
->command
= scsicmd
[9];
2297 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2298 * SET_FEATURES - XFER MODE must be preceded/succeeded
2299 * by an update to hardware-specific registers for each
2300 * controller (i.e. the reason for ->set_piomode(),
2301 * ->set_dmamode(), and ->post_set_mode() hooks).
2303 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2304 && (tf
->feature
== SETFEATURES_XFER
))
2308 * Set flags so that all registers will be written,
2309 * and pass on write indication (used for PIO/DMA
2312 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2314 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2315 tf
->flags
|= ATA_TFLAG_WRITE
;
2318 * Set transfer length.
2320 * TODO: find out if we need to do more here to
2321 * cover scatter/gather case.
2323 qc
->nsect
= cmd
->bufflen
/ ATA_SECT_SIZE
;
2329 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2331 * @cmd: SCSI command opcode to consider
2333 * Look up the SCSI command given, and determine whether the
2334 * SCSI command is to be translated or simulated.
2337 * Pointer to translation function if possible, %NULL if not.
2340 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2350 return ata_scsi_rw_xlat
;
2352 case SYNCHRONIZE_CACHE
:
2353 if (ata_try_flush_cache(dev
))
2354 return ata_scsi_flush_xlat
;
2359 return ata_scsi_verify_xlat
;
2363 return ata_scsi_pass_thru
;
2366 return ata_scsi_start_stop_xlat
;
2373 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2374 * @ap: ATA port to which the command was being sent
2375 * @cmd: SCSI command to dump
2377 * Prints the contents of a SCSI command via printk().
2380 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2381 struct scsi_cmnd
*cmd
)
2384 struct scsi_device
*scsidev
= cmd
->device
;
2385 u8
*scsicmd
= cmd
->cmnd
;
2387 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2389 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2390 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2391 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2397 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2398 * @cmd: SCSI command to be sent
2399 * @done: Completion function, called when command is complete
2401 * In some cases, this function translates SCSI commands into
2402 * ATA taskfiles, and queues the taskfiles to be sent to
2403 * hardware. In other cases, this function simulates a
2404 * SCSI device by evaluating and responding to certain
2405 * SCSI commands. This creates the overall effect of
2406 * ATA and ATAPI devices appearing as SCSI devices.
2409 * Releases scsi-layer-held lock, and obtains host_set lock.
2415 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2417 struct ata_port
*ap
;
2418 struct ata_device
*dev
;
2419 struct scsi_device
*scsidev
= cmd
->device
;
2420 struct Scsi_Host
*shost
= scsidev
->host
;
2422 ap
= (struct ata_port
*) &shost
->hostdata
[0];
2424 spin_unlock(shost
->host_lock
);
2425 spin_lock(&ap
->host_set
->lock
);
2427 ata_scsi_dump_cdb(ap
, cmd
);
2429 dev
= ata_scsi_find_dev(ap
, scsidev
);
2430 if (unlikely(!dev
)) {
2431 cmd
->result
= (DID_BAD_TARGET
<< 16);
2436 if (dev
->class == ATA_DEV_ATA
) {
2437 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2441 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
2443 ata_scsi_simulate(dev
->id
, cmd
, done
);
2445 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
2448 spin_unlock(&ap
->host_set
->lock
);
2449 spin_lock(shost
->host_lock
);
2454 * ata_scsi_simulate - simulate SCSI command on ATA device
2455 * @id: current IDENTIFY data for target device.
2456 * @cmd: SCSI command being sent to device.
2457 * @done: SCSI command completion function.
2459 * Interprets and directly executes a select list of SCSI commands
2460 * that can be handled internally.
2463 * spin_lock_irqsave(host_set lock)
2466 void ata_scsi_simulate(u16
*id
,
2467 struct scsi_cmnd
*cmd
,
2468 void (*done
)(struct scsi_cmnd
*))
2470 struct ata_scsi_args args
;
2471 const u8
*scsicmd
= cmd
->cmnd
;
2477 switch(scsicmd
[0]) {
2478 /* no-op's, complete with success */
2479 case SYNCHRONIZE_CACHE
:
2483 case TEST_UNIT_READY
:
2484 case FORMAT_UNIT
: /* FIXME: correct? */
2485 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2486 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2490 if (scsicmd
[1] & 2) /* is CmdDt set? */
2491 ata_scsi_invalid_field(cmd
, done
);
2492 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2493 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2494 else if (scsicmd
[2] == 0x00)
2495 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2496 else if (scsicmd
[2] == 0x80)
2497 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2498 else if (scsicmd
[2] == 0x83)
2499 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2501 ata_scsi_invalid_field(cmd
, done
);
2506 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2509 case MODE_SELECT
: /* unconditionally return */
2510 case MODE_SELECT_10
: /* bad-field-in-cdb */
2511 ata_scsi_invalid_field(cmd
, done
);
2515 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2518 case SERVICE_ACTION_IN
:
2519 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2520 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2522 ata_scsi_invalid_field(cmd
, done
);
2526 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2529 /* mandatory commands we haven't implemented yet */
2532 /* all other commands */
2534 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2535 /* "Invalid command operation code" */
2541 void ata_scsi_scan_host(struct ata_port
*ap
)
2543 struct ata_device
*dev
;
2546 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
2549 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2550 dev
= &ap
->device
[i
];
2552 if (ata_dev_present(dev
))
2553 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);