2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_eh.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_request.h>
44 #include <linux/libata.h>
45 #include <linux/hdreg.h>
46 #include <asm/uaccess.h>
50 #define SECTOR_SIZE 512
52 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
, const u8
*scsicmd
);
53 static struct ata_device
*
54 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
);
56 #define RW_RECOVERY_MPAGE 0x1
57 #define RW_RECOVERY_MPAGE_LEN 12
58 #define CACHE_MPAGE 0x8
59 #define CACHE_MPAGE_LEN 20
60 #define CONTROL_MPAGE 0xa
61 #define CONTROL_MPAGE_LEN 12
62 #define ALL_MPAGES 0x3f
63 #define ALL_SUB_MPAGES 0xff
66 static const u8 def_rw_recovery_mpage
[] = {
68 RW_RECOVERY_MPAGE_LEN
- 2,
69 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
70 (1 << 6), /* ARRE (auto read reallocation) */
71 0, /* read retry count */
73 0, /* write retry count */
77 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
80 0, /* contains WCE, needs to be 0 for logic */
81 0, 0, 0, 0, 0, 0, 0, 0, 0,
82 0, /* contains DRA, needs to be 0 for logic */
86 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
88 CONTROL_MPAGE_LEN
- 2,
89 2, /* DSENSE=0, GLTSD=1 */
90 0, /* [QAM+QERR may be 1, see 05-359r1] */
91 0, 0, 0, 0, 0xff, 0xff,
92 0, 30 /* extended self test time, see 05-359r1 */
96 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
97 void (*done
)(struct scsi_cmnd
*))
99 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
100 /* "Invalid field in cbd" */
105 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
106 * @sdev: SCSI device for which BIOS geometry is to be determined
107 * @bdev: block device associated with @sdev
108 * @capacity: capacity of SCSI device
109 * @geom: location to which geometry will be output
111 * Generic bios head/sector/cylinder calculator
112 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
113 * mapping. Some situations may arise where the disk is not
114 * bootable if this is not used.
117 * Defined by the SCSI layer. We don't really care.
122 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
123 sector_t capacity
, int geom
[])
127 sector_div(capacity
, 255*63);
134 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
135 * @scsidev: Device to which we are issuing command
136 * @arg: User provided data for issuing command
139 * Defined by the SCSI layer. We don't really care.
142 * Zero on success, negative errno on error.
145 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
148 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
149 u8 args
[4], *argbuf
= NULL
;
151 struct scsi_sense_hdr sshdr
;
152 enum dma_data_direction data_dir
;
157 if (copy_from_user(args
, arg
, sizeof(args
)))
160 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
163 argsize
= SECTOR_SIZE
* args
[3];
164 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
165 if (argbuf
== NULL
) {
170 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
171 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
172 block count in sector count field */
173 data_dir
= DMA_FROM_DEVICE
;
175 scsi_cmd
[1] = (3 << 1); /* Non-data */
176 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
180 scsi_cmd
[0] = ATA_16
;
182 scsi_cmd
[4] = args
[2];
183 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
184 scsi_cmd
[6] = args
[3];
185 scsi_cmd
[8] = args
[1];
189 scsi_cmd
[6] = args
[1];
191 scsi_cmd
[14] = args
[0];
193 /* Good values for timeout and retries? Values below
194 from scsi_ioctl_send_command() for default case... */
195 if (scsi_execute_req(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
196 &sshdr
, (10*HZ
), 5)) {
201 /* Need code to retrieve data from check condition? */
204 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
214 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
215 * @scsidev: Device to which we are issuing command
216 * @arg: User provided data for issuing command
219 * Defined by the SCSI layer. We don't really care.
222 * Zero on success, negative errno on error.
224 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
227 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
229 struct scsi_sense_hdr sshdr
;
234 if (copy_from_user(args
, arg
, sizeof(args
)))
237 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
238 scsi_cmd
[0] = ATA_16
;
239 scsi_cmd
[1] = (3 << 1); /* Non-data */
240 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
241 scsi_cmd
[4] = args
[1];
242 scsi_cmd
[6] = args
[2];
243 scsi_cmd
[8] = args
[3];
244 scsi_cmd
[10] = args
[4];
245 scsi_cmd
[12] = args
[5];
246 scsi_cmd
[14] = args
[0];
248 /* Good values for timeout and retries? Values below
249 from scsi_ioctl_send_command() for default case... */
250 if (scsi_execute_req(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0, &sshdr
,
254 /* Need code to retrieve data from check condition? */
258 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
261 struct ata_device
*dev
;
262 int val
= -EINVAL
, rc
= -EINVAL
;
264 ap
= (struct ata_port
*) &scsidev
->host
->hostdata
[0];
268 dev
= ata_scsi_find_dev(ap
, scsidev
);
275 case ATA_IOC_GET_IO32
:
277 if (copy_to_user(arg
, &val
, 1))
281 case ATA_IOC_SET_IO32
:
282 val
= (unsigned long) arg
;
288 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
290 return ata_cmd_ioctl(scsidev
, arg
);
292 case HDIO_DRIVE_TASK
:
293 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
295 return ata_task_ioctl(scsidev
, arg
);
307 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
308 * @ap: ATA port to which the new command is attached
309 * @dev: ATA device to which the new command is attached
310 * @cmd: SCSI command that originated this ATA command
311 * @done: SCSI command completion function
313 * Obtain a reference to an unused ata_queued_cmd structure,
314 * which is the basic libata structure representing a single
315 * ATA command sent to the hardware.
317 * If a command was available, fill in the SCSI-specific
318 * portions of the structure with information on the
322 * spin_lock_irqsave(host_set lock)
325 * Command allocated, or %NULL if none available.
327 struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_port
*ap
,
328 struct ata_device
*dev
,
329 struct scsi_cmnd
*cmd
,
330 void (*done
)(struct scsi_cmnd
*))
332 struct ata_queued_cmd
*qc
;
334 qc
= ata_qc_new_init(ap
, dev
);
340 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
341 qc
->n_elem
= cmd
->use_sg
;
343 qc
->__sg
= &qc
->sgent
;
347 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
355 * ata_dump_status - user friendly display of error info
356 * @id: id of the port in question
357 * @tf: ptr to filled out taskfile
359 * Decode and dump the ATA error/status registers for the user so
360 * that they have some idea what really happened at the non
361 * make-believe layer.
364 * inherited from caller
366 void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
368 u8 stat
= tf
->command
, err
= tf
->feature
;
370 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
371 if (stat
& ATA_BUSY
) {
372 printk("Busy }\n"); /* Data is not valid in this case */
374 if (stat
& 0x40) printk("DriveReady ");
375 if (stat
& 0x20) printk("DeviceFault ");
376 if (stat
& 0x10) printk("SeekComplete ");
377 if (stat
& 0x08) printk("DataRequest ");
378 if (stat
& 0x04) printk("CorrectedError ");
379 if (stat
& 0x02) printk("Index ");
380 if (stat
& 0x01) printk("Error ");
384 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
385 if (err
& 0x04) printk("DriveStatusError ");
387 if (err
& 0x04) printk("BadCRC ");
388 else printk("Sector ");
390 if (err
& 0x40) printk("UncorrectableError ");
391 if (err
& 0x10) printk("SectorIdNotFound ");
392 if (err
& 0x02) printk("TrackZeroNotFound ");
393 if (err
& 0x01) printk("AddrMarkNotFound ");
399 int ata_scsi_device_resume(struct scsi_device
*sdev
)
401 struct ata_port
*ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
402 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
404 return ata_device_resume(ap
, dev
);
407 int ata_scsi_device_suspend(struct scsi_device
*sdev
)
409 struct ata_port
*ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
410 struct ata_device
*dev
= &ap
->device
[sdev
->id
];
412 return ata_device_suspend(ap
, dev
);
416 * ata_to_sense_error - convert ATA error to SCSI error
417 * @id: ATA device number
418 * @drv_stat: value contained in ATA status register
419 * @drv_err: value contained in ATA error register
420 * @sk: the sense key we'll fill out
421 * @asc: the additional sense code we'll fill out
422 * @ascq: the additional sense code qualifier we'll fill out
424 * Converts an ATA error into a SCSI error. Fill out pointers to
425 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
426 * format sense blocks.
429 * spin_lock_irqsave(host_set lock)
431 void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
, u8
*asc
,
436 /* Based on the 3ware driver translation table */
437 static const unsigned char sense_table
[][4] = {
439 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
441 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
443 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
444 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
445 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
446 /* MC|ID|ABRT|TRK0|MARK */
447 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
449 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
450 /* Bad address mark */
451 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
453 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
455 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
456 /* Media change request */
457 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
459 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
461 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
463 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
464 /* BBD - block marked bad */
465 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
466 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
468 static const unsigned char stat_table
[][4] = {
469 /* Must be first because BUSY means no other bits valid */
470 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
471 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
472 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
473 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
474 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
478 * Is this an error we can process/parse
480 if (drv_stat
& ATA_BUSY
) {
481 drv_err
= 0; /* Ignore the err bits, they're invalid */
485 /* Look for drv_err */
486 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
487 /* Look for best matches first */
488 if ((sense_table
[i
][0] & drv_err
) ==
490 *sk
= sense_table
[i
][1];
491 *asc
= sense_table
[i
][2];
492 *ascq
= sense_table
[i
][3];
496 /* No immediate match */
497 printk(KERN_WARNING
"ata%u: no sense translation for "
498 "error 0x%02x\n", id
, drv_err
);
501 /* Fall back to interpreting status bits */
502 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
503 if (stat_table
[i
][0] & drv_stat
) {
504 *sk
= stat_table
[i
][1];
505 *asc
= stat_table
[i
][2];
506 *ascq
= stat_table
[i
][3];
510 /* No error? Undecoded? */
511 printk(KERN_WARNING
"ata%u: no sense translation for status: 0x%02x\n",
514 /* For our last chance pick, use medium read error because
515 * it's much more common than an ATA drive telling you a write
519 *asc
= 0x11; /* "unrecovered read error" */
520 *ascq
= 0x04; /* "auto-reallocation failed" */
523 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x to "
524 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id
, drv_stat
, drv_err
,
530 * ata_gen_ata_desc_sense - Generate check condition sense block.
531 * @qc: Command that completed.
533 * This function is specific to the ATA descriptor format sense
534 * block specified for the ATA pass through commands. Regardless
535 * of whether the command errored or not, return a sense
536 * block. Copy all controller registers into the sense
537 * block. Clear sense key, ASC & ASCQ if there is no error.
540 * spin_lock_irqsave(host_set lock)
542 void ata_gen_ata_desc_sense(struct ata_queued_cmd
*qc
)
544 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
545 struct ata_taskfile
*tf
= &qc
->tf
;
546 unsigned char *sb
= cmd
->sense_buffer
;
547 unsigned char *desc
= sb
+ 8;
549 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
551 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
554 * Read the controller registers.
556 WARN_ON(qc
->ap
->ops
->tf_read
== NULL
);
557 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
560 * Use ata_to_sense_error() to map status register bits
561 * onto sense key, asc & ascq.
563 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
564 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
565 &sb
[1], &sb
[2], &sb
[3]);
570 * Sense data is current and format is descriptor.
577 * Set length of additional sense data.
578 * Since we only populate descriptor 0, the total
579 * length is the same (fixed) length as descriptor 0.
581 desc
[1] = sb
[7] = 14;
584 * Copy registers into sense buffer.
587 desc
[3] = tf
->feature
; /* == error reg */
592 desc
[12] = tf
->device
;
593 desc
[13] = tf
->command
; /* == status reg */
596 * Fill in Extend bit, and the high order bytes
599 if (tf
->flags
& ATA_TFLAG_LBA48
) {
601 desc
[4] = tf
->hob_nsect
;
602 desc
[6] = tf
->hob_lbal
;
603 desc
[8] = tf
->hob_lbam
;
604 desc
[10] = tf
->hob_lbah
;
609 * ata_gen_fixed_sense - generate a SCSI fixed sense block
610 * @qc: Command that we are erroring out
612 * Leverage ata_to_sense_error() to give us the codes. Fit our
613 * LBA in here if there's room.
616 * inherited from caller
618 void ata_gen_fixed_sense(struct ata_queued_cmd
*qc
)
620 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
621 struct ata_taskfile
*tf
= &qc
->tf
;
622 unsigned char *sb
= cmd
->sense_buffer
;
624 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
626 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
629 * Read the controller registers.
631 WARN_ON(qc
->ap
->ops
->tf_read
== NULL
);
632 qc
->ap
->ops
->tf_read(qc
->ap
, tf
);
635 * Use ata_to_sense_error() to map status register bits
636 * onto sense key, asc & ascq.
638 if (tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
639 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
640 &sb
[2], &sb
[12], &sb
[13]);
647 if (tf
->flags
& ATA_TFLAG_LBA48
) {
648 /* TODO: find solution for LBA48 descriptors */
651 else if (tf
->flags
& ATA_TFLAG_LBA
) {
652 /* A small (28b) LBA will fit in the 32b info field */
653 sb
[0] |= 0x80; /* set valid bit */
654 sb
[3] = tf
->device
& 0x0f;
666 * ata_scsi_slave_config - Set SCSI device attributes
667 * @sdev: SCSI device to examine
669 * This is called before we actually start reading
670 * and writing to the device, to configure certain
671 * SCSI mid-layer behaviors.
674 * Defined by SCSI layer. We don't really care.
677 int ata_scsi_slave_config(struct scsi_device
*sdev
)
679 sdev
->use_10_for_rw
= 1;
680 sdev
->use_10_for_ms
= 1;
682 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
684 if (sdev
->id
< ATA_MAX_DEVICES
) {
686 struct ata_device
*dev
;
687 unsigned int max_sectors
;
689 ap
= (struct ata_port
*) &sdev
->host
->hostdata
[0];
690 dev
= &ap
->device
[sdev
->id
];
692 /* TODO: 2048 is an arbitrary number, not the
693 * hardware maximum. This should be increased to
694 * 65534 when Jens Axboe's patch for dynamically
695 * determining max_sectors is merged.
697 max_sectors
= ATA_MAX_SECTORS
;
698 if (dev
->flags
& ATA_DFLAG_LBA48
)
700 if (dev
->max_sectors
)
701 max_sectors
= dev
->max_sectors
;
703 blk_queue_max_sectors(sdev
->request_queue
, max_sectors
);
706 * SATA DMA transfers must be multiples of 4 byte, so
707 * we need to pad ATAPI transfers using an extra sg.
708 * Decrement max hw segments accordingly.
710 if (dev
->class == ATA_DEV_ATAPI
) {
711 request_queue_t
*q
= sdev
->request_queue
;
712 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
716 return 0; /* scsi layer doesn't check return value, sigh */
720 * ata_scsi_timed_out - SCSI layer time out callback
721 * @cmd: timed out SCSI command
723 * Handles SCSI layer timeout. We race with normal completion of
724 * the qc for @cmd. If the qc is already gone, we lose and let
725 * the scsi command finish (EH_HANDLED). Otherwise, the qc has
726 * timed out and EH should be invoked. Prevent ata_qc_complete()
727 * from finishing it by setting EH_SCHEDULED and return
731 * Called from timer context
734 * EH_HANDLED or EH_NOT_HANDLED
736 enum scsi_eh_timer_return
ata_scsi_timed_out(struct scsi_cmnd
*cmd
)
738 struct Scsi_Host
*host
= cmd
->device
->host
;
739 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
741 struct ata_queued_cmd
*qc
;
742 enum scsi_eh_timer_return ret
= EH_HANDLED
;
746 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
747 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
749 WARN_ON(qc
->scsicmd
!= cmd
);
750 qc
->flags
|= ATA_QCFLAG_EH_SCHEDULED
;
751 qc
->err_mask
|= AC_ERR_TIMEOUT
;
752 ret
= EH_NOT_HANDLED
;
754 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
756 DPRINTK("EXIT, ret=%d\n", ret
);
761 * ata_scsi_error - SCSI layer error handler callback
762 * @host: SCSI host on which error occurred
764 * Handles SCSI-layer-thrown error events.
767 * Inherited from SCSI layer (none, can sleep)
773 int ata_scsi_error(struct Scsi_Host
*host
)
780 ap
= (struct ata_port
*) &host
->hostdata
[0];
782 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
783 WARN_ON(ap
->flags
& ATA_FLAG_IN_EH
);
784 ap
->flags
|= ATA_FLAG_IN_EH
;
785 WARN_ON(ata_qc_from_tag(ap
, ap
->active_tag
) == NULL
);
786 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
788 ata_port_flush_task(ap
);
790 ap
->ops
->eng_timeout(ap
);
792 WARN_ON(host
->host_failed
|| !list_empty(&host
->eh_cmd_q
));
794 scsi_eh_flush_done_q(&ap
->eh_done_q
);
796 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
797 ap
->flags
&= ~ATA_FLAG_IN_EH
;
798 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
804 static void ata_eh_scsidone(struct scsi_cmnd
*scmd
)
809 static void __ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
811 struct ata_port
*ap
= qc
->ap
;
812 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
815 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
816 qc
->scsidone
= ata_eh_scsidone
;
817 __ata_qc_complete(qc
);
818 WARN_ON(ata_tag_valid(qc
->tag
));
819 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
821 scsi_eh_finish_cmd(scmd
, &ap
->eh_done_q
);
825 * ata_eh_qc_complete - Complete an active ATA command from EH
826 * @qc: Command to complete
828 * Indicate to the mid and upper layers that an ATA command has
829 * completed. To be used from EH.
831 void ata_eh_qc_complete(struct ata_queued_cmd
*qc
)
833 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
834 scmd
->retries
= scmd
->allowed
;
835 __ata_eh_qc_complete(qc
);
839 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
840 * @qc: Command to retry
842 * Indicate to the mid and upper layers that an ATA command
843 * should be retried. To be used from EH.
845 * SCSI midlayer limits the number of retries to scmd->allowed.
846 * This function might need to adjust scmd->retries for commands
847 * which get retried due to unrelated NCQ failures.
849 void ata_eh_qc_retry(struct ata_queued_cmd
*qc
)
851 __ata_eh_qc_complete(qc
);
855 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
856 * @qc: Storage for translated ATA taskfile
857 * @scsicmd: SCSI command to translate
859 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
860 * (to start). Perhaps these commands should be preceded by
861 * CHECK POWER MODE to see what power mode the device is already in.
862 * [See SAT revision 5 at www.t10.org]
865 * spin_lock_irqsave(host_set lock)
868 * Zero on success, non-zero on error.
871 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
874 struct ata_taskfile
*tf
= &qc
->tf
;
876 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
877 tf
->protocol
= ATA_PROT_NODATA
;
878 if (scsicmd
[1] & 0x1) {
879 ; /* ignore IMMED bit, violates sat-r05 */
881 if (scsicmd
[4] & 0x2)
882 goto invalid_fld
; /* LOEJ bit set not supported */
883 if (((scsicmd
[4] >> 4) & 0xf) != 0)
884 goto invalid_fld
; /* power conditions not supported */
885 if (scsicmd
[4] & 0x1) {
886 tf
->nsect
= 1; /* 1 sector, lba=0 */
888 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
889 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
894 tf
->device
|= ATA_LBA
;
897 tf
->lbal
= 0x1; /* sect */
898 tf
->lbam
= 0x0; /* cyl low */
899 tf
->lbah
= 0x0; /* cyl high */
902 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
904 tf
->nsect
= 0; /* time period value (0 implies now) */
905 tf
->command
= ATA_CMD_STANDBY
;
906 /* Consider: ATA STANDBY IMMEDIATE command */
909 * Standby and Idle condition timers could be implemented but that
910 * would require libata to implement the Power condition mode page
911 * and allow the user to change it. Changing mode pages requires
912 * MODE SELECT to be implemented.
918 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
919 /* "Invalid field in cbd" */
925 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
926 * @qc: Storage for translated ATA taskfile
927 * @scsicmd: SCSI command to translate (ignored)
929 * Sets up an ATA taskfile to issue FLUSH CACHE or
933 * spin_lock_irqsave(host_set lock)
936 * Zero on success, non-zero on error.
939 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
941 struct ata_taskfile
*tf
= &qc
->tf
;
943 tf
->flags
|= ATA_TFLAG_DEVICE
;
944 tf
->protocol
= ATA_PROT_NODATA
;
946 if ((qc
->dev
->flags
& ATA_DFLAG_LBA48
) &&
947 (ata_id_has_flush_ext(qc
->dev
->id
)))
948 tf
->command
= ATA_CMD_FLUSH_EXT
;
950 tf
->command
= ATA_CMD_FLUSH
;
956 * scsi_6_lba_len - Get LBA and transfer length
957 * @scsicmd: SCSI command to translate
959 * Calculate LBA and transfer length for 6-byte commands.
963 * @plen: the transfer length
966 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
971 VPRINTK("six-byte command\n");
973 lba
|= ((u64
)scsicmd
[2]) << 8;
974 lba
|= ((u64
)scsicmd
[3]);
976 len
|= ((u32
)scsicmd
[4]);
983 * scsi_10_lba_len - Get LBA and transfer length
984 * @scsicmd: SCSI command to translate
986 * Calculate LBA and transfer length for 10-byte commands.
990 * @plen: the transfer length
993 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
998 VPRINTK("ten-byte command\n");
1000 lba
|= ((u64
)scsicmd
[2]) << 24;
1001 lba
|= ((u64
)scsicmd
[3]) << 16;
1002 lba
|= ((u64
)scsicmd
[4]) << 8;
1003 lba
|= ((u64
)scsicmd
[5]);
1005 len
|= ((u32
)scsicmd
[7]) << 8;
1006 len
|= ((u32
)scsicmd
[8]);
1013 * scsi_16_lba_len - Get LBA and transfer length
1014 * @scsicmd: SCSI command to translate
1016 * Calculate LBA and transfer length for 16-byte commands.
1020 * @plen: the transfer length
1023 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
1028 VPRINTK("sixteen-byte command\n");
1030 lba
|= ((u64
)scsicmd
[2]) << 56;
1031 lba
|= ((u64
)scsicmd
[3]) << 48;
1032 lba
|= ((u64
)scsicmd
[4]) << 40;
1033 lba
|= ((u64
)scsicmd
[5]) << 32;
1034 lba
|= ((u64
)scsicmd
[6]) << 24;
1035 lba
|= ((u64
)scsicmd
[7]) << 16;
1036 lba
|= ((u64
)scsicmd
[8]) << 8;
1037 lba
|= ((u64
)scsicmd
[9]);
1039 len
|= ((u32
)scsicmd
[10]) << 24;
1040 len
|= ((u32
)scsicmd
[11]) << 16;
1041 len
|= ((u32
)scsicmd
[12]) << 8;
1042 len
|= ((u32
)scsicmd
[13]);
1049 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1050 * @qc: Storage for translated ATA taskfile
1051 * @scsicmd: SCSI command to translate
1053 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1056 * spin_lock_irqsave(host_set lock)
1059 * Zero on success, non-zero on error.
1062 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1064 struct ata_taskfile
*tf
= &qc
->tf
;
1065 struct ata_device
*dev
= qc
->dev
;
1066 u64 dev_sectors
= qc
->dev
->n_sectors
;
1070 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1071 tf
->protocol
= ATA_PROT_NODATA
;
1073 if (scsicmd
[0] == VERIFY
)
1074 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1075 else if (scsicmd
[0] == VERIFY_16
)
1076 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1082 if (block
>= dev_sectors
)
1084 if ((block
+ n_block
) > dev_sectors
)
1087 if (dev
->flags
& ATA_DFLAG_LBA
) {
1088 tf
->flags
|= ATA_TFLAG_LBA
;
1090 if (lba_28_ok(block
, n_block
)) {
1092 tf
->command
= ATA_CMD_VERIFY
;
1093 tf
->device
|= (block
>> 24) & 0xf;
1094 } else if (lba_48_ok(block
, n_block
)) {
1095 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1099 tf
->flags
|= ATA_TFLAG_LBA48
;
1100 tf
->command
= ATA_CMD_VERIFY_EXT
;
1102 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1104 tf
->hob_lbah
= (block
>> 40) & 0xff;
1105 tf
->hob_lbam
= (block
>> 32) & 0xff;
1106 tf
->hob_lbal
= (block
>> 24) & 0xff;
1108 /* request too large even for LBA48 */
1111 tf
->nsect
= n_block
& 0xff;
1113 tf
->lbah
= (block
>> 16) & 0xff;
1114 tf
->lbam
= (block
>> 8) & 0xff;
1115 tf
->lbal
= block
& 0xff;
1117 tf
->device
|= ATA_LBA
;
1120 u32 sect
, head
, cyl
, track
;
1122 if (!lba_28_ok(block
, n_block
))
1125 /* Convert LBA to CHS */
1126 track
= (u32
)block
/ dev
->sectors
;
1127 cyl
= track
/ dev
->heads
;
1128 head
= track
% dev
->heads
;
1129 sect
= (u32
)block
% dev
->sectors
+ 1;
1131 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1132 (u32
)block
, track
, cyl
, head
, sect
);
1134 /* Check whether the converted CHS can fit.
1138 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1141 tf
->command
= ATA_CMD_VERIFY
;
1142 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1145 tf
->lbah
= cyl
>> 8;
1152 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1153 /* "Invalid field in cbd" */
1157 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1158 /* "Logical Block Address out of range" */
1162 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1167 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1168 * @qc: Storage for translated ATA taskfile
1169 * @scsicmd: SCSI command to translate
1171 * Converts any of six SCSI read/write commands into the
1172 * ATA counterpart, including starting sector (LBA),
1173 * sector count, and taking into account the device's LBA48
1176 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1177 * %WRITE_16 are currently supported.
1180 * spin_lock_irqsave(host_set lock)
1183 * Zero on success, non-zero on error.
1186 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1188 struct ata_taskfile
*tf
= &qc
->tf
;
1189 struct ata_device
*dev
= qc
->dev
;
1193 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1195 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1196 scsicmd
[0] == WRITE_16
)
1197 tf
->flags
|= ATA_TFLAG_WRITE
;
1199 /* Calculate the SCSI LBA, transfer length and FUA. */
1200 switch (scsicmd
[0]) {
1203 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1204 if (unlikely(scsicmd
[1] & (1 << 3)))
1205 tf
->flags
|= ATA_TFLAG_FUA
;
1209 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1211 /* for 6-byte r/w commands, transfer length 0
1212 * means 256 blocks of data, not 0 block.
1219 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1220 if (unlikely(scsicmd
[1] & (1 << 3)))
1221 tf
->flags
|= ATA_TFLAG_FUA
;
1224 DPRINTK("no-byte command\n");
1228 /* Check and compose ATA command */
1230 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1231 * length 0 means transfer 0 block of data.
1232 * However, for ATA R/W commands, sector count 0 means
1233 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1235 * WARNING: one or two older ATA drives treat 0 as 0...
1239 if (dev
->flags
& ATA_DFLAG_LBA
) {
1240 tf
->flags
|= ATA_TFLAG_LBA
;
1242 if (lba_28_ok(block
, n_block
)) {
1244 tf
->device
|= (block
>> 24) & 0xf;
1245 } else if (lba_48_ok(block
, n_block
)) {
1246 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1250 tf
->flags
|= ATA_TFLAG_LBA48
;
1252 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1254 tf
->hob_lbah
= (block
>> 40) & 0xff;
1255 tf
->hob_lbam
= (block
>> 32) & 0xff;
1256 tf
->hob_lbal
= (block
>> 24) & 0xff;
1258 /* request too large even for LBA48 */
1261 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1264 qc
->nsect
= n_block
;
1265 tf
->nsect
= n_block
& 0xff;
1267 tf
->lbah
= (block
>> 16) & 0xff;
1268 tf
->lbam
= (block
>> 8) & 0xff;
1269 tf
->lbal
= block
& 0xff;
1271 tf
->device
|= ATA_LBA
;
1274 u32 sect
, head
, cyl
, track
;
1276 /* The request -may- be too large for CHS addressing. */
1277 if (!lba_28_ok(block
, n_block
))
1280 if (unlikely(ata_rwcmd_protocol(qc
) < 0))
1283 /* Convert LBA to CHS */
1284 track
= (u32
)block
/ dev
->sectors
;
1285 cyl
= track
/ dev
->heads
;
1286 head
= track
% dev
->heads
;
1287 sect
= (u32
)block
% dev
->sectors
+ 1;
1289 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1290 (u32
)block
, track
, cyl
, head
, sect
);
1292 /* Check whether the converted CHS can fit.
1296 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1299 qc
->nsect
= n_block
;
1300 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1303 tf
->lbah
= cyl
>> 8;
1310 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1311 /* "Invalid field in cbd" */
1315 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1316 /* "Logical Block Address out of range" */
1320 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1324 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1326 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1327 u8
*cdb
= cmd
->cmnd
;
1328 int need_sense
= (qc
->err_mask
!= 0);
1330 /* For ATA pass thru (SAT) commands, generate a sense block if
1331 * user mandated it or if there's an error. Note that if we
1332 * generate because the user forced us to, a check condition
1333 * is generated and the ATA register values are returned
1334 * whether the command completed successfully or not. If there
1335 * was no error, SK, ASC and ASCQ will all be zero.
1337 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1338 ((cdb
[2] & 0x20) || need_sense
)) {
1339 ata_gen_ata_desc_sense(qc
);
1342 cmd
->result
= SAM_STAT_GOOD
;
1344 /* TODO: decide which descriptor format to use
1345 * for 48b LBA devices and call that here
1346 * instead of the fixed desc, which is only
1347 * good for smaller LBA (and maybe CHS?)
1350 ata_gen_fixed_sense(qc
);
1355 /* The ata_gen_..._sense routines fill in tf */
1356 ata_dump_status(qc
->ap
->id
, &qc
->tf
);
1365 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1366 * @ap: ATA port to which the command is addressed
1367 * @dev: ATA device to which the command is addressed
1368 * @cmd: SCSI command to execute
1369 * @done: SCSI command completion function
1370 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1372 * Our ->queuecommand() function has decided that the SCSI
1373 * command issued can be directly translated into an ATA
1374 * command, rather than handled internally.
1376 * This function sets up an ata_queued_cmd structure for the
1377 * SCSI command, and sends that ata_queued_cmd to the hardware.
1379 * The xlat_func argument (actor) returns 0 if ready to execute
1380 * ATA command, else 1 to finish translation. If 1 is returned
1381 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1382 * to be set reflecting an error condition or clean (early)
1386 * spin_lock_irqsave(host_set lock)
1389 static void ata_scsi_translate(struct ata_port
*ap
, struct ata_device
*dev
,
1390 struct scsi_cmnd
*cmd
,
1391 void (*done
)(struct scsi_cmnd
*),
1392 ata_xlat_func_t xlat_func
)
1394 struct ata_queued_cmd
*qc
;
1395 u8
*scsicmd
= cmd
->cmnd
;
1399 qc
= ata_scsi_qc_new(ap
, dev
, cmd
, done
);
1403 /* data is present; dma-map it */
1404 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1405 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1406 if (unlikely(cmd
->request_bufflen
< 1)) {
1407 printk(KERN_WARNING
"ata%u(%u): WARNING: zero len r/w req\n",
1408 ap
->id
, dev
->devno
);
1413 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1415 ata_sg_init_one(qc
, cmd
->request_buffer
,
1416 cmd
->request_bufflen
);
1418 qc
->dma_dir
= cmd
->sc_data_direction
;
1421 qc
->complete_fn
= ata_scsi_qc_complete
;
1423 if (xlat_func(qc
, scsicmd
))
1426 /* select device, send command to hardware */
1427 qc
->err_mask
= ata_qc_issue(qc
);
1429 ata_qc_complete(qc
);
1437 DPRINTK("EXIT - early finish (good or error)\n");
1443 cmd
->result
= (DID_ERROR
<< 16);
1445 DPRINTK("EXIT - internal\n");
1450 * ata_scsi_rbuf_get - Map response buffer.
1451 * @cmd: SCSI command containing buffer to be mapped.
1452 * @buf_out: Pointer to mapped area.
1454 * Maps buffer contained within SCSI command @cmd.
1457 * spin_lock_irqsave(host_set lock)
1460 * Length of response buffer.
1463 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1466 unsigned int buflen
;
1469 struct scatterlist
*sg
;
1471 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1472 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1473 buflen
= sg
->length
;
1475 buf
= cmd
->request_buffer
;
1476 buflen
= cmd
->request_bufflen
;
1484 * ata_scsi_rbuf_put - Unmap response buffer.
1485 * @cmd: SCSI command containing buffer to be unmapped.
1486 * @buf: buffer to unmap
1488 * Unmaps response buffer contained within @cmd.
1491 * spin_lock_irqsave(host_set lock)
1494 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1497 struct scatterlist
*sg
;
1499 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1500 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1505 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1506 * @args: device IDENTIFY data / SCSI command of interest.
1507 * @actor: Callback hook for desired SCSI command simulator
1509 * Takes care of the hard work of simulating a SCSI command...
1510 * Mapping the response buffer, calling the command's handler,
1511 * and handling the handler's return value. This return value
1512 * indicates whether the handler wishes the SCSI command to be
1513 * completed successfully (0), or not (in which case cmd->result
1514 * and sense buffer are assumed to be set).
1517 * spin_lock_irqsave(host_set lock)
1520 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1521 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1522 u8
*rbuf
, unsigned int buflen
))
1525 unsigned int buflen
, rc
;
1526 struct scsi_cmnd
*cmd
= args
->cmd
;
1528 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1529 memset(rbuf
, 0, buflen
);
1530 rc
= actor(args
, rbuf
, buflen
);
1531 ata_scsi_rbuf_put(cmd
, rbuf
);
1534 cmd
->result
= SAM_STAT_GOOD
;
1539 * ata_scsiop_inq_std - Simulate INQUIRY command
1540 * @args: device IDENTIFY data / SCSI command of interest.
1541 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1542 * @buflen: Response buffer length.
1544 * Returns standard device identification data associated
1545 * with non-VPD INQUIRY command output.
1548 * spin_lock_irqsave(host_set lock)
1551 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1552 unsigned int buflen
)
1557 0x5, /* claim SPC-3 version compatibility */
1562 /* set scsi removeable (RMB) bit per ata bit */
1563 if (ata_id_removeable(args
->id
))
1568 memcpy(rbuf
, hdr
, sizeof(hdr
));
1571 memcpy(&rbuf
[8], "ATA ", 8);
1572 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1573 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1574 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1575 memcpy(&rbuf
[32], "n/a ", 4);
1579 const u8 versions
[] = {
1580 0x60, /* SAM-3 (no version claimed) */
1583 0x20, /* SBC-2 (no version claimed) */
1586 0x60 /* SPC-3 (no version claimed) */
1589 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1596 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1597 * @args: device IDENTIFY data / SCSI command of interest.
1598 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1599 * @buflen: Response buffer length.
1601 * Returns list of inquiry VPD pages available.
1604 * spin_lock_irqsave(host_set lock)
1607 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1608 unsigned int buflen
)
1610 const u8 pages
[] = {
1611 0x00, /* page 0x00, this page */
1612 0x80, /* page 0x80, unit serial no page */
1613 0x83 /* page 0x83, device ident page */
1615 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1618 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1624 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1625 * @args: device IDENTIFY data / SCSI command of interest.
1626 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1627 * @buflen: Response buffer length.
1629 * Returns ATA device serial number.
1632 * spin_lock_irqsave(host_set lock)
1635 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1636 unsigned int buflen
)
1640 0x80, /* this page code */
1642 ATA_SERNO_LEN
, /* page len */
1644 memcpy(rbuf
, hdr
, sizeof(hdr
));
1646 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1647 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1648 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1654 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1655 * @args: device IDENTIFY data / SCSI command of interest.
1656 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1657 * @buflen: Response buffer length.
1659 * Yields two logical unit device identification designators:
1660 * - vendor specific ASCII containing the ATA serial number
1661 * - SAT defined "t10 vendor id based" containing ASCII vendor
1662 * name ("ATA "), model and serial numbers.
1665 * spin_lock_irqsave(host_set lock)
1668 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1669 unsigned int buflen
)
1672 const int sat_model_serial_desc_len
= 68;
1673 const int ata_model_byte_len
= 40;
1675 rbuf
[1] = 0x83; /* this page code */
1678 if (buflen
> (ATA_SERNO_LEN
+ num
+ 3)) {
1679 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1681 rbuf
[num
+ 3] = ATA_SERNO_LEN
;
1683 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1684 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1685 num
+= ATA_SERNO_LEN
;
1687 if (buflen
> (sat_model_serial_desc_len
+ num
+ 3)) {
1688 /* SAT defined lu model and serial numbers descriptor */
1689 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1692 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
1694 memcpy(rbuf
+ num
, "ATA ", 8);
1696 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1697 ATA_ID_PROD_OFS
, ata_model_byte_len
);
1698 num
+= ata_model_byte_len
;
1699 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1700 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1701 num
+= ATA_SERNO_LEN
;
1703 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
1708 * ata_scsiop_noop - Command handler that simply returns success.
1709 * @args: device IDENTIFY data / SCSI command of interest.
1710 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1711 * @buflen: Response buffer length.
1713 * No operation. Simply returns success to caller, to indicate
1714 * that the caller should successfully complete this SCSI command.
1717 * spin_lock_irqsave(host_set lock)
1720 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1721 unsigned int buflen
)
1728 * ata_msense_push - Push data onto MODE SENSE data output buffer
1729 * @ptr_io: (input/output) Location to store more output data
1730 * @last: End of output data buffer
1731 * @buf: Pointer to BLOB being added to output buffer
1732 * @buflen: Length of BLOB
1734 * Store MODE SENSE data on an output buffer.
1740 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1741 const u8
*buf
, unsigned int buflen
)
1745 if ((ptr
+ buflen
- 1) > last
)
1748 memcpy(ptr
, buf
, buflen
);
1756 * ata_msense_caching - Simulate MODE SENSE caching info page
1757 * @id: device IDENTIFY data
1758 * @ptr_io: (input/output) Location to store more output data
1759 * @last: End of output data buffer
1761 * Generate a caching info page, which conditionally indicates
1762 * write caching to the SCSI layer, depending on device
1769 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1772 u8 page
[CACHE_MPAGE_LEN
];
1774 memcpy(page
, def_cache_mpage
, sizeof(page
));
1775 if (ata_id_wcache_enabled(id
))
1776 page
[2] |= (1 << 2); /* write cache enable */
1777 if (!ata_id_rahead_enabled(id
))
1778 page
[12] |= (1 << 5); /* disable read ahead */
1780 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1781 return sizeof(page
);
1785 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1786 * @dev: Device associated with this MODE SENSE command
1787 * @ptr_io: (input/output) Location to store more output data
1788 * @last: End of output data buffer
1790 * Generate a generic MODE SENSE control mode page.
1796 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1798 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1799 sizeof(def_control_mpage
));
1800 return sizeof(def_control_mpage
);
1804 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1805 * @dev: Device associated with this MODE SENSE command
1806 * @ptr_io: (input/output) Location to store more output data
1807 * @last: End of output data buffer
1809 * Generate a generic MODE SENSE r/w error recovery page.
1815 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1818 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1819 sizeof(def_rw_recovery_mpage
));
1820 return sizeof(def_rw_recovery_mpage
);
1824 * We can turn this into a real blacklist if it's needed, for now just
1825 * blacklist any Maxtor BANC1G10 revision firmware
1827 static int ata_dev_supports_fua(u16
*id
)
1829 unsigned char model
[41], fw
[9];
1833 if (!ata_id_has_fua(id
))
1836 ata_id_c_string(id
, model
, ATA_ID_PROD_OFS
, sizeof(model
));
1837 ata_id_c_string(id
, fw
, ATA_ID_FW_REV_OFS
, sizeof(fw
));
1839 if (strcmp(model
, "Maxtor"))
1841 if (strcmp(fw
, "BANC1G10"))
1844 return 0; /* blacklisted */
1848 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1849 * @args: device IDENTIFY data / SCSI command of interest.
1850 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1851 * @buflen: Response buffer length.
1853 * Simulate MODE SENSE commands. Assume this is invoked for direct
1854 * access devices (e.g. disks) only. There should be no block
1855 * descriptor for other device types.
1858 * spin_lock_irqsave(host_set lock)
1861 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1862 unsigned int buflen
)
1864 struct ata_device
*dev
= args
->dev
;
1865 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1866 const u8 sat_blk_desc
[] = {
1867 0, 0, 0, 0, /* number of blocks: sat unspecified */
1869 0, 0x2, 0x0 /* block length: 512 bytes */
1872 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1877 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1878 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1880 * LLBA bit in msense(10) ignored (compliant)
1883 page_control
= scsicmd
[2] >> 6;
1884 switch (page_control
) {
1885 case 0: /* current */
1886 break; /* supported */
1888 goto saving_not_supp
;
1889 case 1: /* changeable */
1890 case 2: /* defaults */
1896 output_len
= 4 + (ebd
? 8 : 0);
1897 alloc_len
= scsicmd
[4];
1899 output_len
= 8 + (ebd
? 8 : 0);
1900 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1902 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1904 p
= rbuf
+ output_len
;
1905 last
= rbuf
+ minlen
- 1;
1907 pg
= scsicmd
[2] & 0x3f;
1910 * No mode subpages supported (yet) but asking for _all_
1911 * subpages may be valid
1913 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
1917 case RW_RECOVERY_MPAGE
:
1918 output_len
+= ata_msense_rw_recovery(&p
, last
);
1922 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1925 case CONTROL_MPAGE
: {
1926 output_len
+= ata_msense_ctl_mode(&p
, last
);
1931 output_len
+= ata_msense_rw_recovery(&p
, last
);
1932 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
1933 output_len
+= ata_msense_ctl_mode(&p
, last
);
1936 default: /* invalid page code */
1944 if (ata_dev_supports_fua(args
->id
) && dev
->flags
& ATA_DFLAG_LBA48
&&
1945 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
1950 rbuf
[0] = output_len
;
1955 rbuf
[3] = sizeof(sat_blk_desc
);
1957 memcpy(rbuf
+ 4, sat_blk_desc
,
1958 sizeof(sat_blk_desc
));
1962 rbuf
[0] = output_len
>> 8;
1964 rbuf
[1] = output_len
;
1969 rbuf
[7] = sizeof(sat_blk_desc
);
1971 memcpy(rbuf
+ 8, sat_blk_desc
,
1972 sizeof(sat_blk_desc
));
1978 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1979 /* "Invalid field in cbd" */
1983 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
1984 /* "Saving parameters not supported" */
1989 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1990 * @args: device IDENTIFY data / SCSI command of interest.
1991 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1992 * @buflen: Response buffer length.
1994 * Simulate READ CAPACITY commands.
1997 * spin_lock_irqsave(host_set lock)
2000 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
2001 unsigned int buflen
)
2008 if (ata_id_has_lba(args
->id
)) {
2009 if (ata_id_has_lba48(args
->id
))
2010 n_sectors
= ata_id_u64(args
->id
, 100);
2012 n_sectors
= ata_id_u32(args
->id
, 60);
2014 /* CHS default translation */
2015 n_sectors
= args
->id
[1] * args
->id
[3] * args
->id
[6];
2017 if (ata_id_current_chs_valid(args
->id
))
2018 /* CHS current translation */
2019 n_sectors
= ata_id_u32(args
->id
, 57);
2022 n_sectors
--; /* ATA TotalUserSectors - 1 */
2024 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2025 if( n_sectors
>= 0xffffffffULL
)
2026 tmp
= 0xffffffff ; /* Return max count on overflow */
2030 /* sector count, 32-bit */
2031 rbuf
[0] = tmp
>> (8 * 3);
2032 rbuf
[1] = tmp
>> (8 * 2);
2033 rbuf
[2] = tmp
>> (8 * 1);
2037 tmp
= ATA_SECT_SIZE
;
2042 /* sector count, 64-bit */
2043 tmp
= n_sectors
>> (8 * 4);
2044 rbuf
[2] = tmp
>> (8 * 3);
2045 rbuf
[3] = tmp
>> (8 * 2);
2046 rbuf
[4] = tmp
>> (8 * 1);
2049 rbuf
[6] = tmp
>> (8 * 3);
2050 rbuf
[7] = tmp
>> (8 * 2);
2051 rbuf
[8] = tmp
>> (8 * 1);
2055 tmp
= ATA_SECT_SIZE
;
2056 rbuf
[12] = tmp
>> 8;
2064 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2065 * @args: device IDENTIFY data / SCSI command of interest.
2066 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2067 * @buflen: Response buffer length.
2069 * Simulate REPORT LUNS command.
2072 * spin_lock_irqsave(host_set lock)
2075 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
2076 unsigned int buflen
)
2079 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2085 * ata_scsi_set_sense - Set SCSI sense data and status
2086 * @cmd: SCSI request to be handled
2087 * @sk: SCSI-defined sense key
2088 * @asc: SCSI-defined additional sense code
2089 * @ascq: SCSI-defined additional sense code qualifier
2091 * Helper function that builds a valid fixed format, current
2092 * response code and the given sense key (sk), additional sense
2093 * code (asc) and additional sense code qualifier (ascq) with
2094 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2095 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2101 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
2103 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
2105 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
2106 cmd
->sense_buffer
[2] = sk
;
2107 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
2108 cmd
->sense_buffer
[12] = asc
;
2109 cmd
->sense_buffer
[13] = ascq
;
2113 * ata_scsi_badcmd - End a SCSI request with an error
2114 * @cmd: SCSI request to be handled
2115 * @done: SCSI command completion function
2116 * @asc: SCSI-defined additional sense code
2117 * @ascq: SCSI-defined additional sense code qualifier
2119 * Helper function that completes a SCSI command with
2120 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2121 * and the specified additional sense codes.
2124 * spin_lock_irqsave(host_set lock)
2127 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
2130 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
2135 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2137 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0))
2138 /* FIXME: not quite right; we don't want the
2139 * translation of taskfile registers into
2140 * a sense descriptors, since that's only
2141 * correct for ATA, not ATAPI
2143 ata_gen_ata_desc_sense(qc
);
2145 qc
->scsidone(qc
->scsicmd
);
2149 /* is it pointless to prefer PIO for "safety reasons"? */
2150 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2152 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2155 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2157 struct ata_port
*ap
= qc
->ap
;
2158 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2160 DPRINTK("ATAPI request sense\n");
2162 /* FIXME: is this needed? */
2163 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
2165 ap
->ops
->tf_read(ap
, &qc
->tf
);
2167 /* fill these in, for the case where they are -not- overwritten */
2168 cmd
->sense_buffer
[0] = 0x70;
2169 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2173 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
2174 qc
->dma_dir
= DMA_FROM_DEVICE
;
2176 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2177 qc
->cdb
[0] = REQUEST_SENSE
;
2178 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2180 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2181 qc
->tf
.command
= ATA_CMD_PACKET
;
2183 if (ata_pio_use_silly(ap
)) {
2184 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2185 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2187 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2188 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2189 qc
->tf
.lbah
= (8 * 1024) >> 8;
2191 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2193 qc
->complete_fn
= atapi_sense_complete
;
2195 qc
->err_mask
= ata_qc_issue(qc
);
2197 ata_qc_complete(qc
);
2202 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2204 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2205 unsigned int err_mask
= qc
->err_mask
;
2207 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2209 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2210 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2211 atapi_request_sense(qc
);
2215 else if (unlikely(err_mask
))
2216 /* FIXME: not quite right; we don't want the
2217 * translation of taskfile registers into
2218 * a sense descriptors, since that's only
2219 * correct for ATA, not ATAPI
2221 ata_gen_ata_desc_sense(qc
);
2224 u8
*scsicmd
= cmd
->cmnd
;
2226 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2228 unsigned int buflen
;
2230 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2232 /* ATAPI devices typically report zero for their SCSI version,
2233 * and sometimes deviate from the spec WRT response data
2234 * format. If SCSI version is reported as zero like normal,
2235 * then we make the following fixups: 1) Fake MMC-5 version,
2236 * to indicate to the Linux scsi midlayer this is a modern
2237 * device. 2) Ensure response data format / ATAPI information
2238 * are always correct.
2245 ata_scsi_rbuf_put(cmd
, buf
);
2248 cmd
->result
= SAM_STAT_GOOD
;
2255 * atapi_xlat - Initialize PACKET taskfile
2256 * @qc: command structure to be initialized
2257 * @scsicmd: SCSI CDB associated with this PACKET command
2260 * spin_lock_irqsave(host_set lock)
2263 * Zero on success, non-zero on failure.
2266 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2268 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2269 struct ata_device
*dev
= qc
->dev
;
2270 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2271 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2274 /* Check whether ATAPI DMA is safe */
2275 if (ata_check_atapi_dma(qc
))
2278 memcpy(&qc
->cdb
, scsicmd
, dev
->cdb_len
);
2280 qc
->complete_fn
= atapi_qc_complete
;
2282 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2283 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2284 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2285 DPRINTK("direction: write\n");
2288 qc
->tf
.command
= ATA_CMD_PACKET
;
2290 /* no data, or PIO data xfer */
2291 if (using_pio
|| nodata
) {
2293 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2295 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2296 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2297 qc
->tf
.lbah
= (8 * 1024) >> 8;
2302 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2303 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2305 #ifdef ATAPI_ENABLE_DMADIR
2306 /* some SATA bridges need us to indicate data xfer direction */
2307 if (cmd
->sc_data_direction
!= DMA_TO_DEVICE
)
2308 qc
->tf
.feature
|= ATAPI_DMADIR
;
2312 qc
->nbytes
= cmd
->bufflen
;
2318 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2319 * @ap: ATA port to which the device is attached
2320 * @scsidev: SCSI device from which we derive the ATA device
2322 * Given various information provided in struct scsi_cmnd,
2323 * map that onto an ATA bus, and using that mapping
2324 * determine which ata_device is associated with the
2325 * SCSI command to be sent.
2328 * spin_lock_irqsave(host_set lock)
2331 * Associated ATA device, or %NULL if not found.
2334 static struct ata_device
*
2335 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2337 struct ata_device
*dev
;
2339 /* skip commands not addressed to targets we simulate */
2340 if (likely(scsidev
->id
< ATA_MAX_DEVICES
))
2341 dev
= &ap
->device
[scsidev
->id
];
2345 if (unlikely((scsidev
->channel
!= 0) ||
2346 (scsidev
->lun
!= 0)))
2349 if (unlikely(!ata_dev_present(dev
)))
2352 if (!atapi_enabled
|| (ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2353 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2354 printk(KERN_WARNING
"ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2355 ap
->id
, dev
->devno
, atapi_enabled
? "not supported with this driver" : "disabled");
2364 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2365 * @byte1: Byte 1 from pass-thru CDB.
2368 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2371 ata_scsi_map_proto(u8 byte1
)
2373 switch((byte1
& 0x1e) >> 1) {
2374 case 3: /* Non-data */
2375 return ATA_PROT_NODATA
;
2378 return ATA_PROT_DMA
;
2380 case 4: /* PIO Data-in */
2381 case 5: /* PIO Data-out */
2383 return ATA_PROT_PIO_MULT
;
2385 return ATA_PROT_PIO
;
2387 case 10: /* Device Reset */
2388 case 0: /* Hard Reset */
2390 case 2: /* Bus Idle */
2391 case 7: /* Packet */
2392 case 8: /* DMA Queued */
2393 case 9: /* Device Diagnostic */
2394 case 11: /* UDMA Data-in */
2395 case 12: /* UDMA Data-Out */
2396 case 13: /* FPDMA */
2397 default: /* Reserved */
2401 return ATA_PROT_UNKNOWN
;
2405 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2406 * @qc: command structure to be initialized
2407 * @scsicmd: SCSI command to convert
2409 * Handles either 12 or 16-byte versions of the CDB.
2412 * Zero on success, non-zero on failure.
2415 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2417 struct ata_taskfile
*tf
= &(qc
->tf
);
2418 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2420 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2424 * 12 and 16 byte CDBs use different offsets to
2425 * provide the various register values.
2427 if (scsicmd
[0] == ATA_16
) {
2429 * 16-byte CDB - may contain extended commands.
2431 * If that is the case, copy the upper byte register values.
2433 if (scsicmd
[1] & 0x01) {
2434 tf
->hob_feature
= scsicmd
[3];
2435 tf
->hob_nsect
= scsicmd
[5];
2436 tf
->hob_lbal
= scsicmd
[7];
2437 tf
->hob_lbam
= scsicmd
[9];
2438 tf
->hob_lbah
= scsicmd
[11];
2439 tf
->flags
|= ATA_TFLAG_LBA48
;
2441 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2444 * Always copy low byte, device and command registers.
2446 tf
->feature
= scsicmd
[4];
2447 tf
->nsect
= scsicmd
[6];
2448 tf
->lbal
= scsicmd
[8];
2449 tf
->lbam
= scsicmd
[10];
2450 tf
->lbah
= scsicmd
[12];
2451 tf
->device
= scsicmd
[13];
2452 tf
->command
= scsicmd
[14];
2455 * 12-byte CDB - incapable of extended commands.
2457 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2459 tf
->feature
= scsicmd
[3];
2460 tf
->nsect
= scsicmd
[4];
2461 tf
->lbal
= scsicmd
[5];
2462 tf
->lbam
= scsicmd
[6];
2463 tf
->lbah
= scsicmd
[7];
2464 tf
->device
= scsicmd
[8];
2465 tf
->command
= scsicmd
[9];
2468 * If slave is possible, enforce correct master/slave bit
2470 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2471 tf
->device
= qc
->dev
->devno
?
2472 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2475 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2476 * SET_FEATURES - XFER MODE must be preceded/succeeded
2477 * by an update to hardware-specific registers for each
2478 * controller (i.e. the reason for ->set_piomode(),
2479 * ->set_dmamode(), and ->post_set_mode() hooks).
2481 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2482 && (tf
->feature
== SETFEATURES_XFER
))
2486 * Set flags so that all registers will be written,
2487 * and pass on write indication (used for PIO/DMA
2490 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2492 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2493 tf
->flags
|= ATA_TFLAG_WRITE
;
2496 * Set transfer length.
2498 * TODO: find out if we need to do more here to
2499 * cover scatter/gather case.
2501 qc
->nsect
= cmd
->bufflen
/ ATA_SECT_SIZE
;
2506 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2507 /* "Invalid field in cdb" */
2512 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2514 * @cmd: SCSI command opcode to consider
2516 * Look up the SCSI command given, and determine whether the
2517 * SCSI command is to be translated or simulated.
2520 * Pointer to translation function if possible, %NULL if not.
2523 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2533 return ata_scsi_rw_xlat
;
2535 case SYNCHRONIZE_CACHE
:
2536 if (ata_try_flush_cache(dev
))
2537 return ata_scsi_flush_xlat
;
2542 return ata_scsi_verify_xlat
;
2546 return ata_scsi_pass_thru
;
2549 return ata_scsi_start_stop_xlat
;
2556 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2557 * @ap: ATA port to which the command was being sent
2558 * @cmd: SCSI command to dump
2560 * Prints the contents of a SCSI command via printk().
2563 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2564 struct scsi_cmnd
*cmd
)
2567 struct scsi_device
*scsidev
= cmd
->device
;
2568 u8
*scsicmd
= cmd
->cmnd
;
2570 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2572 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2573 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2574 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2580 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2581 * @cmd: SCSI command to be sent
2582 * @done: Completion function, called when command is complete
2584 * In some cases, this function translates SCSI commands into
2585 * ATA taskfiles, and queues the taskfiles to be sent to
2586 * hardware. In other cases, this function simulates a
2587 * SCSI device by evaluating and responding to certain
2588 * SCSI commands. This creates the overall effect of
2589 * ATA and ATAPI devices appearing as SCSI devices.
2592 * Releases scsi-layer-held lock, and obtains host_set lock.
2598 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2600 struct ata_port
*ap
;
2601 struct ata_device
*dev
;
2602 struct scsi_device
*scsidev
= cmd
->device
;
2603 struct Scsi_Host
*shost
= scsidev
->host
;
2605 ap
= (struct ata_port
*) &shost
->hostdata
[0];
2607 spin_unlock(shost
->host_lock
);
2608 spin_lock(&ap
->host_set
->lock
);
2610 ata_scsi_dump_cdb(ap
, cmd
);
2612 dev
= ata_scsi_find_dev(ap
, scsidev
);
2613 if (unlikely(!dev
)) {
2614 cmd
->result
= (DID_BAD_TARGET
<< 16);
2619 if (dev
->class == ATA_DEV_ATA
) {
2620 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2624 ata_scsi_translate(ap
, dev
, cmd
, done
, xlat_func
);
2626 ata_scsi_simulate(ap
, dev
, cmd
, done
);
2628 ata_scsi_translate(ap
, dev
, cmd
, done
, atapi_xlat
);
2631 spin_unlock(&ap
->host_set
->lock
);
2632 spin_lock(shost
->host_lock
);
2637 * ata_scsi_simulate - simulate SCSI command on ATA device
2638 * @ap: port the device is connected to
2639 * @dev: the target device
2640 * @cmd: SCSI command being sent to device.
2641 * @done: SCSI command completion function.
2643 * Interprets and directly executes a select list of SCSI commands
2644 * that can be handled internally.
2647 * spin_lock_irqsave(host_set lock)
2650 void ata_scsi_simulate(struct ata_port
*ap
, struct ata_device
*dev
,
2651 struct scsi_cmnd
*cmd
,
2652 void (*done
)(struct scsi_cmnd
*))
2654 struct ata_scsi_args args
;
2655 const u8
*scsicmd
= cmd
->cmnd
;
2663 switch(scsicmd
[0]) {
2664 /* no-op's, complete with success */
2665 case SYNCHRONIZE_CACHE
:
2669 case TEST_UNIT_READY
:
2670 case FORMAT_UNIT
: /* FIXME: correct? */
2671 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2672 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2676 if (scsicmd
[1] & 2) /* is CmdDt set? */
2677 ata_scsi_invalid_field(cmd
, done
);
2678 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2679 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2680 else if (scsicmd
[2] == 0x00)
2681 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2682 else if (scsicmd
[2] == 0x80)
2683 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2684 else if (scsicmd
[2] == 0x83)
2685 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2687 ata_scsi_invalid_field(cmd
, done
);
2692 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2695 case MODE_SELECT
: /* unconditionally return */
2696 case MODE_SELECT_10
: /* bad-field-in-cdb */
2697 ata_scsi_invalid_field(cmd
, done
);
2701 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2704 case SERVICE_ACTION_IN
:
2705 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2706 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2708 ata_scsi_invalid_field(cmd
, done
);
2712 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2715 /* mandatory commands we haven't implemented yet */
2718 /* all other commands */
2720 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2721 /* "Invalid command operation code" */
2727 void ata_scsi_scan_host(struct ata_port
*ap
)
2729 struct ata_device
*dev
;
2732 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
2735 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2736 dev
= &ap
->device
[i
];
2738 if (ata_dev_present(dev
))
2739 scsi_scan_target(&ap
->host
->shost_gendev
, 0, i
, 0, 0);