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_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t
)(struct ata_queued_cmd
*qc
, const u8
*scsicmd
);
56 static struct ata_device
* __ata_scsi_find_dev(struct ata_port
*ap
,
57 const struct scsi_device
*scsidev
);
58 static struct ata_device
* ata_scsi_find_dev(struct ata_port
*ap
,
59 const struct scsi_device
*scsidev
);
60 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
61 unsigned int id
, unsigned int lun
);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage
[] = {
76 RW_RECOVERY_MPAGE_LEN
- 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
81 0, /* write retry count */
85 static const u8 def_cache_mpage
[CACHE_MPAGE_LEN
] = {
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
94 static const u8 def_control_mpage
[CONTROL_MPAGE_LEN
] = {
96 CONTROL_MPAGE_LEN
- 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
107 struct scsi_transport_template ata_scsi_transport_template
= {
108 .eh_strategy_handler
= ata_scsi_error
,
109 .eh_timed_out
= ata_scsi_timed_out
,
110 .user_scan
= ata_scsi_user_scan
,
114 static void ata_scsi_invalid_field(struct scsi_cmnd
*cmd
,
115 void (*done
)(struct scsi_cmnd
*))
117 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
118 /* "Invalid field in cbd" */
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
135 * Defined by the SCSI layer. We don't really care.
140 int ata_std_bios_param(struct scsi_device
*sdev
, struct block_device
*bdev
,
141 sector_t capacity
, int geom
[])
145 sector_div(capacity
, 255*63);
152 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
153 * @scsidev: Device to which we are issuing command
154 * @arg: User provided data for issuing command
157 * Defined by the SCSI layer. We don't really care.
160 * Zero on success, negative errno on error.
163 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
166 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
167 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
169 enum dma_data_direction data_dir
;
175 if (copy_from_user(args
, arg
, sizeof(args
)))
178 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
182 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
185 argsize
= SECTOR_SIZE
* args
[3];
186 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
187 if (argbuf
== NULL
) {
192 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
193 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
194 block count in sector count field */
195 data_dir
= DMA_FROM_DEVICE
;
197 scsi_cmd
[1] = (3 << 1); /* Non-data */
198 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
202 scsi_cmd
[0] = ATA_16
;
204 scsi_cmd
[4] = args
[2];
205 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
206 scsi_cmd
[6] = args
[3];
207 scsi_cmd
[8] = args
[1];
211 scsi_cmd
[6] = args
[1];
213 scsi_cmd
[14] = args
[0];
215 /* Good values for timeout and retries? Values below
216 from scsi_ioctl_send_command() for default case... */
217 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
218 sensebuf
, (10*HZ
), 5, 0);
220 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
221 u8
*desc
= sensebuf
+ 8;
222 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
224 /* If we set cc then ATA pass-through will cause a
225 * check condition even if no error. Filter that. */
226 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
227 struct scsi_sense_hdr sshdr
;
228 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
230 if (sshdr
.sense_key
==0 &&
231 sshdr
.asc
==0 && sshdr
.ascq
==0)
232 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
235 /* Send userspace a few ATA registers (same as drivers/ide) */
236 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
237 desc
[0] == 0x09 ) { /* code is "ATA Descriptor" */
238 args
[0] = desc
[13]; /* status */
239 args
[1] = desc
[3]; /* error */
240 args
[2] = desc
[5]; /* sector count (0:7) */
241 if (copy_to_user(arg
, args
, sizeof(args
)))
253 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
262 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
263 * @scsidev: Device to which we are issuing command
264 * @arg: User provided data for issuing command
267 * Defined by the SCSI layer. We don't really care.
270 * Zero on success, negative errno on error.
272 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
275 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
277 struct scsi_sense_hdr sshdr
;
282 if (copy_from_user(args
, arg
, sizeof(args
)))
285 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
286 scsi_cmd
[0] = ATA_16
;
287 scsi_cmd
[1] = (3 << 1); /* Non-data */
288 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
289 scsi_cmd
[4] = args
[1];
290 scsi_cmd
[6] = args
[2];
291 scsi_cmd
[8] = args
[3];
292 scsi_cmd
[10] = args
[4];
293 scsi_cmd
[12] = args
[5];
294 scsi_cmd
[14] = args
[0];
296 /* Good values for timeout and retries? Values below
297 from scsi_ioctl_send_command() for default case... */
298 if (scsi_execute_req(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0, &sshdr
,
302 /* Need code to retrieve data from check condition? */
306 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
308 int val
= -EINVAL
, rc
= -EINVAL
;
311 case ATA_IOC_GET_IO32
:
313 if (copy_to_user(arg
, &val
, 1))
317 case ATA_IOC_SET_IO32
:
318 val
= (unsigned long) arg
;
324 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
326 return ata_cmd_ioctl(scsidev
, arg
);
328 case HDIO_DRIVE_TASK
:
329 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
331 return ata_task_ioctl(scsidev
, arg
);
342 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
343 * @dev: ATA device to which the new command is attached
344 * @cmd: SCSI command that originated this ATA command
345 * @done: SCSI command completion function
347 * Obtain a reference to an unused ata_queued_cmd structure,
348 * which is the basic libata structure representing a single
349 * ATA command sent to the hardware.
351 * If a command was available, fill in the SCSI-specific
352 * portions of the structure with information on the
356 * spin_lock_irqsave(host lock)
359 * Command allocated, or %NULL if none available.
361 struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
362 struct scsi_cmnd
*cmd
,
363 void (*done
)(struct scsi_cmnd
*))
365 struct ata_queued_cmd
*qc
;
367 qc
= ata_qc_new_init(dev
);
373 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
374 qc
->n_elem
= cmd
->use_sg
;
376 qc
->__sg
= &qc
->sgent
;
380 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
388 * ata_dump_status - user friendly display of error info
389 * @id: id of the port in question
390 * @tf: ptr to filled out taskfile
392 * Decode and dump the ATA error/status registers for the user so
393 * that they have some idea what really happened at the non
394 * make-believe layer.
397 * inherited from caller
399 void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
401 u8 stat
= tf
->command
, err
= tf
->feature
;
403 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
404 if (stat
& ATA_BUSY
) {
405 printk("Busy }\n"); /* Data is not valid in this case */
407 if (stat
& 0x40) printk("DriveReady ");
408 if (stat
& 0x20) printk("DeviceFault ");
409 if (stat
& 0x10) printk("SeekComplete ");
410 if (stat
& 0x08) printk("DataRequest ");
411 if (stat
& 0x04) printk("CorrectedError ");
412 if (stat
& 0x02) printk("Index ");
413 if (stat
& 0x01) printk("Error ");
417 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
418 if (err
& 0x04) printk("DriveStatusError ");
420 if (err
& 0x04) printk("BadCRC ");
421 else printk("Sector ");
423 if (err
& 0x40) printk("UncorrectableError ");
424 if (err
& 0x10) printk("SectorIdNotFound ");
425 if (err
& 0x02) printk("TrackZeroNotFound ");
426 if (err
& 0x01) printk("AddrMarkNotFound ");
433 * ata_scsi_device_suspend - suspend ATA device associated with sdev
434 * @sdev: the SCSI device to suspend
435 * @mesg: target power management message
437 * Request suspend EH action on the ATA device associated with
438 * @sdev and wait for the operation to complete.
441 * Kernel thread context (may sleep).
444 * 0 on success, -errno otherwise.
446 int ata_scsi_device_suspend(struct scsi_device
*sdev
, pm_message_t mesg
)
448 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
449 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
457 spin_lock_irqsave(ap
->lock
, flags
);
459 /* wait for the previous resume to complete */
460 while (dev
->flags
& ATA_DFLAG_SUSPENDED
) {
461 spin_unlock_irqrestore(ap
->lock
, flags
);
462 ata_port_wait_eh(ap
);
463 spin_lock_irqsave(ap
->lock
, flags
);
466 /* if @sdev is already detached, nothing to do */
467 if (sdev
->sdev_state
== SDEV_OFFLINE
||
468 sdev
->sdev_state
== SDEV_CANCEL
|| sdev
->sdev_state
== SDEV_DEL
)
471 /* request suspend */
472 action
= ATA_EH_SUSPEND
;
473 if (mesg
.event
!= PM_EVENT_SUSPEND
)
474 action
|= ATA_EH_PM_FREEZE
;
475 ap
->eh_info
.dev_action
[dev
->devno
] |= action
;
476 ap
->eh_info
.flags
|= ATA_EHI_QUIET
;
477 ata_port_schedule_eh(ap
);
479 spin_unlock_irqrestore(ap
->lock
, flags
);
481 /* wait for EH to do the job */
482 ata_port_wait_eh(ap
);
484 spin_lock_irqsave(ap
->lock
, flags
);
486 /* If @sdev is still attached but the associated ATA device
487 * isn't suspended, the operation failed.
489 if (sdev
->sdev_state
!= SDEV_OFFLINE
&&
490 sdev
->sdev_state
!= SDEV_CANCEL
&& sdev
->sdev_state
!= SDEV_DEL
&&
491 !(dev
->flags
& ATA_DFLAG_SUSPENDED
))
495 spin_unlock_irqrestore(ap
->lock
, flags
);
498 sdev
->sdev_gendev
.power
.power_state
= mesg
;
503 * ata_scsi_device_resume - resume ATA device associated with sdev
504 * @sdev: the SCSI device to resume
506 * Request resume EH action on the ATA device associated with
507 * @sdev and return immediately. This enables parallel
508 * wakeup/spinup of devices.
511 * Kernel thread context (may sleep).
516 int ata_scsi_device_resume(struct scsi_device
*sdev
)
518 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
519 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
520 struct ata_eh_info
*ehi
= &ap
->eh_info
;
527 spin_lock_irqsave(ap
->lock
, flags
);
529 /* if @sdev is already detached, nothing to do */
530 if (sdev
->sdev_state
== SDEV_OFFLINE
||
531 sdev
->sdev_state
== SDEV_CANCEL
|| sdev
->sdev_state
== SDEV_DEL
)
535 action
= ATA_EH_RESUME
;
536 if (sdev
->sdev_gendev
.power
.power_state
.event
== PM_EVENT_SUSPEND
)
537 __ata_ehi_hotplugged(ehi
);
539 action
|= ATA_EH_PM_FREEZE
| ATA_EH_SOFTRESET
;
540 ehi
->dev_action
[dev
->devno
] |= action
;
542 /* We don't want autopsy and verbose EH messages. Disable
543 * those if we're the only device on this link.
545 if (ata_port_max_devices(ap
) == 1)
546 ehi
->flags
|= ATA_EHI_NO_AUTOPSY
| ATA_EHI_QUIET
;
548 ata_port_schedule_eh(ap
);
551 spin_unlock_irqrestore(ap
->lock
, flags
);
553 sdev
->sdev_gendev
.power
.power_state
= PMSG_ON
;
558 * ata_to_sense_error - convert ATA error to SCSI error
559 * @id: ATA device number
560 * @drv_stat: value contained in ATA status register
561 * @drv_err: value contained in ATA error register
562 * @sk: the sense key we'll fill out
563 * @asc: the additional sense code we'll fill out
564 * @ascq: the additional sense code qualifier we'll fill out
565 * @verbose: be verbose
567 * Converts an ATA error into a SCSI error. Fill out pointers to
568 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
569 * format sense blocks.
572 * spin_lock_irqsave(host lock)
574 void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
, u8
*asc
,
575 u8
*ascq
, int verbose
)
579 /* Based on the 3ware driver translation table */
580 static const unsigned char sense_table
[][4] = {
582 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
584 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
586 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
587 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
588 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
589 /* MC|ID|ABRT|TRK0|MARK */
590 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
592 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
593 /* Bad address mark */
594 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
596 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
598 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
599 /* Media change request */
600 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
602 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
604 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
606 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
607 /* BBD - block marked bad */
608 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
609 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
611 static const unsigned char stat_table
[][4] = {
612 /* Must be first because BUSY means no other bits valid */
613 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
614 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
615 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
616 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
617 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
621 * Is this an error we can process/parse
623 if (drv_stat
& ATA_BUSY
) {
624 drv_err
= 0; /* Ignore the err bits, they're invalid */
628 /* Look for drv_err */
629 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
630 /* Look for best matches first */
631 if ((sense_table
[i
][0] & drv_err
) ==
633 *sk
= sense_table
[i
][1];
634 *asc
= sense_table
[i
][2];
635 *ascq
= sense_table
[i
][3];
639 /* No immediate match */
641 printk(KERN_WARNING
"ata%u: no sense translation for "
642 "error 0x%02x\n", id
, drv_err
);
645 /* Fall back to interpreting status bits */
646 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
647 if (stat_table
[i
][0] & drv_stat
) {
648 *sk
= stat_table
[i
][1];
649 *asc
= stat_table
[i
][2];
650 *ascq
= stat_table
[i
][3];
654 /* No error? Undecoded? */
656 printk(KERN_WARNING
"ata%u: no sense translation for "
657 "status: 0x%02x\n", id
, drv_stat
);
659 /* We need a sensible error return here, which is tricky, and one
660 that won't cause people to do things like return a disk wrongly */
661 *sk
= ABORTED_COMMAND
;
667 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
668 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
669 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
674 * ata_gen_passthru_sense - Generate check condition sense block.
675 * @qc: Command that completed.
677 * This function is specific to the ATA descriptor format sense
678 * block specified for the ATA pass through commands. Regardless
679 * of whether the command errored or not, return a sense
680 * block. Copy all controller registers into the sense
681 * block. Clear sense key, ASC & ASCQ if there is no error.
686 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
688 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
689 struct ata_taskfile
*tf
= &qc
->result_tf
;
690 unsigned char *sb
= cmd
->sense_buffer
;
691 unsigned char *desc
= sb
+ 8;
692 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
694 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
696 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
699 * Use ata_to_sense_error() to map status register bits
700 * onto sense key, asc & ascq.
703 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
704 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
705 &sb
[1], &sb
[2], &sb
[3], verbose
);
710 * Sense data is current and format is descriptor.
716 /* set length of additional sense data */
721 * Copy registers into sense buffer.
724 desc
[3] = tf
->feature
; /* == error reg */
729 desc
[12] = tf
->device
;
730 desc
[13] = tf
->command
; /* == status reg */
733 * Fill in Extend bit, and the high order bytes
736 if (tf
->flags
& ATA_TFLAG_LBA48
) {
738 desc
[4] = tf
->hob_nsect
;
739 desc
[6] = tf
->hob_lbal
;
740 desc
[8] = tf
->hob_lbam
;
741 desc
[10] = tf
->hob_lbah
;
746 * ata_gen_ata_sense - generate a SCSI fixed sense block
747 * @qc: Command that we are erroring out
749 * Generate sense block for a failed ATA command @qc. Descriptor
750 * format is used to accomodate LBA48 block address.
755 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
757 struct ata_device
*dev
= qc
->dev
;
758 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
759 struct ata_taskfile
*tf
= &qc
->result_tf
;
760 unsigned char *sb
= cmd
->sense_buffer
;
761 unsigned char *desc
= sb
+ 8;
762 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
765 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
767 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
769 /* sense data is current and format is descriptor */
772 /* Use ata_to_sense_error() to map status register bits
773 * onto sense key, asc & ascq.
776 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
777 ata_to_sense_error(qc
->ap
->id
, tf
->command
, tf
->feature
,
778 &sb
[1], &sb
[2], &sb
[3], verbose
);
782 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
784 /* information sense data descriptor */
789 desc
[2] |= 0x80; /* valid */
790 desc
[6] = block
>> 40;
791 desc
[7] = block
>> 32;
792 desc
[8] = block
>> 24;
793 desc
[9] = block
>> 16;
794 desc
[10] = block
>> 8;
798 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
800 sdev
->use_10_for_rw
= 1;
801 sdev
->use_10_for_ms
= 1;
804 static void ata_scsi_dev_config(struct scsi_device
*sdev
,
805 struct ata_device
*dev
)
807 /* configure max sectors */
808 blk_queue_max_sectors(sdev
->request_queue
, dev
->max_sectors
);
810 /* SATA DMA transfers must be multiples of 4 byte, so
811 * we need to pad ATAPI transfers using an extra sg.
812 * Decrement max hw segments accordingly.
814 if (dev
->class == ATA_DEV_ATAPI
) {
815 request_queue_t
*q
= sdev
->request_queue
;
816 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
819 if (dev
->flags
& ATA_DFLAG_NCQ
) {
822 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
823 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
824 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
829 * ata_scsi_slave_config - Set SCSI device attributes
830 * @sdev: SCSI device to examine
832 * This is called before we actually start reading
833 * and writing to the device, to configure certain
834 * SCSI mid-layer behaviors.
837 * Defined by SCSI layer. We don't really care.
840 int ata_scsi_slave_config(struct scsi_device
*sdev
)
842 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
843 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
845 ata_scsi_sdev_config(sdev
);
847 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
850 ata_scsi_dev_config(sdev
, dev
);
852 return 0; /* scsi layer doesn't check return value, sigh */
856 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
857 * @sdev: SCSI device to be destroyed
859 * @sdev is about to be destroyed for hot/warm unplugging. If
860 * this unplugging was initiated by libata as indicated by NULL
861 * dev->sdev, this function doesn't have to do anything.
862 * Otherwise, SCSI layer initiated warm-unplug is in progress.
863 * Clear dev->sdev, schedule the device for ATA detach and invoke
867 * Defined by SCSI layer. We don't really care.
869 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
871 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
873 struct ata_device
*dev
;
875 if (!ap
->ops
->error_handler
)
878 spin_lock_irqsave(ap
->lock
, flags
);
879 dev
= __ata_scsi_find_dev(ap
, sdev
);
880 if (dev
&& dev
->sdev
) {
881 /* SCSI device already in CANCEL state, no need to offline it */
883 dev
->flags
|= ATA_DFLAG_DETACH
;
884 ata_port_schedule_eh(ap
);
886 spin_unlock_irqrestore(ap
->lock
, flags
);
890 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
891 * @sdev: SCSI device to configure queue depth for
892 * @queue_depth: new queue depth
894 * This is libata standard hostt->change_queue_depth callback.
895 * SCSI will call into this callback when user tries to set queue
899 * SCSI layer (we don't care)
902 * Newly configured queue depth.
904 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
906 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
907 struct ata_device
*dev
;
912 return sdev
->queue_depth
;
914 dev
= ata_scsi_find_dev(ap
, sdev
);
915 if (!dev
|| !ata_dev_enabled(dev
))
916 return sdev
->queue_depth
;
918 max_depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
919 max_depth
= min(ATA_MAX_QUEUE
- 1, max_depth
);
920 if (queue_depth
> max_depth
)
921 queue_depth
= max_depth
;
923 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
925 spin_lock_irqsave(ap
->lock
, flags
);
927 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
929 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
930 spin_unlock_irqrestore(ap
->lock
, flags
);
936 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
937 * @qc: Storage for translated ATA taskfile
938 * @scsicmd: SCSI command to translate
940 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
941 * (to start). Perhaps these commands should be preceded by
942 * CHECK POWER MODE to see what power mode the device is already in.
943 * [See SAT revision 5 at www.t10.org]
946 * spin_lock_irqsave(host lock)
949 * Zero on success, non-zero on error.
952 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
,
955 struct ata_taskfile
*tf
= &qc
->tf
;
957 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
958 tf
->protocol
= ATA_PROT_NODATA
;
959 if (scsicmd
[1] & 0x1) {
960 ; /* ignore IMMED bit, violates sat-r05 */
962 if (scsicmd
[4] & 0x2)
963 goto invalid_fld
; /* LOEJ bit set not supported */
964 if (((scsicmd
[4] >> 4) & 0xf) != 0)
965 goto invalid_fld
; /* power conditions not supported */
966 if (scsicmd
[4] & 0x1) {
967 tf
->nsect
= 1; /* 1 sector, lba=0 */
969 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
970 tf
->flags
|= ATA_TFLAG_LBA
;
975 tf
->device
|= ATA_LBA
;
978 tf
->lbal
= 0x1; /* sect */
979 tf
->lbam
= 0x0; /* cyl low */
980 tf
->lbah
= 0x0; /* cyl high */
983 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
985 tf
->nsect
= 0; /* time period value (0 implies now) */
986 tf
->command
= ATA_CMD_STANDBY
;
987 /* Consider: ATA STANDBY IMMEDIATE command */
990 * Standby and Idle condition timers could be implemented but that
991 * would require libata to implement the Power condition mode page
992 * and allow the user to change it. Changing mode pages requires
993 * MODE SELECT to be implemented.
999 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1000 /* "Invalid field in cbd" */
1006 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1007 * @qc: Storage for translated ATA taskfile
1008 * @scsicmd: SCSI command to translate (ignored)
1010 * Sets up an ATA taskfile to issue FLUSH CACHE or
1014 * spin_lock_irqsave(host lock)
1017 * Zero on success, non-zero on error.
1020 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1022 struct ata_taskfile
*tf
= &qc
->tf
;
1024 tf
->flags
|= ATA_TFLAG_DEVICE
;
1025 tf
->protocol
= ATA_PROT_NODATA
;
1027 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1028 tf
->command
= ATA_CMD_FLUSH_EXT
;
1030 tf
->command
= ATA_CMD_FLUSH
;
1036 * scsi_6_lba_len - Get LBA and transfer length
1037 * @scsicmd: SCSI command to translate
1039 * Calculate LBA and transfer length for 6-byte commands.
1043 * @plen: the transfer length
1046 static void scsi_6_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
1051 VPRINTK("six-byte command\n");
1053 lba
|= ((u64
)scsicmd
[2]) << 8;
1054 lba
|= ((u64
)scsicmd
[3]);
1056 len
|= ((u32
)scsicmd
[4]);
1063 * scsi_10_lba_len - Get LBA and transfer length
1064 * @scsicmd: SCSI command to translate
1066 * Calculate LBA and transfer length for 10-byte commands.
1070 * @plen: the transfer length
1073 static void scsi_10_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
1078 VPRINTK("ten-byte command\n");
1080 lba
|= ((u64
)scsicmd
[2]) << 24;
1081 lba
|= ((u64
)scsicmd
[3]) << 16;
1082 lba
|= ((u64
)scsicmd
[4]) << 8;
1083 lba
|= ((u64
)scsicmd
[5]);
1085 len
|= ((u32
)scsicmd
[7]) << 8;
1086 len
|= ((u32
)scsicmd
[8]);
1093 * scsi_16_lba_len - Get LBA and transfer length
1094 * @scsicmd: SCSI command to translate
1096 * Calculate LBA and transfer length for 16-byte commands.
1100 * @plen: the transfer length
1103 static void scsi_16_lba_len(const u8
*scsicmd
, u64
*plba
, u32
*plen
)
1108 VPRINTK("sixteen-byte command\n");
1110 lba
|= ((u64
)scsicmd
[2]) << 56;
1111 lba
|= ((u64
)scsicmd
[3]) << 48;
1112 lba
|= ((u64
)scsicmd
[4]) << 40;
1113 lba
|= ((u64
)scsicmd
[5]) << 32;
1114 lba
|= ((u64
)scsicmd
[6]) << 24;
1115 lba
|= ((u64
)scsicmd
[7]) << 16;
1116 lba
|= ((u64
)scsicmd
[8]) << 8;
1117 lba
|= ((u64
)scsicmd
[9]);
1119 len
|= ((u32
)scsicmd
[10]) << 24;
1120 len
|= ((u32
)scsicmd
[11]) << 16;
1121 len
|= ((u32
)scsicmd
[12]) << 8;
1122 len
|= ((u32
)scsicmd
[13]);
1129 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1130 * @qc: Storage for translated ATA taskfile
1131 * @scsicmd: SCSI command to translate
1133 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1136 * spin_lock_irqsave(host lock)
1139 * Zero on success, non-zero on error.
1142 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1144 struct ata_taskfile
*tf
= &qc
->tf
;
1145 struct ata_device
*dev
= qc
->dev
;
1146 u64 dev_sectors
= qc
->dev
->n_sectors
;
1150 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1151 tf
->protocol
= ATA_PROT_NODATA
;
1153 if (scsicmd
[0] == VERIFY
)
1154 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1155 else if (scsicmd
[0] == VERIFY_16
)
1156 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1162 if (block
>= dev_sectors
)
1164 if ((block
+ n_block
) > dev_sectors
)
1167 if (dev
->flags
& ATA_DFLAG_LBA
) {
1168 tf
->flags
|= ATA_TFLAG_LBA
;
1170 if (lba_28_ok(block
, n_block
)) {
1172 tf
->command
= ATA_CMD_VERIFY
;
1173 tf
->device
|= (block
>> 24) & 0xf;
1174 } else if (lba_48_ok(block
, n_block
)) {
1175 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1179 tf
->flags
|= ATA_TFLAG_LBA48
;
1180 tf
->command
= ATA_CMD_VERIFY_EXT
;
1182 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1184 tf
->hob_lbah
= (block
>> 40) & 0xff;
1185 tf
->hob_lbam
= (block
>> 32) & 0xff;
1186 tf
->hob_lbal
= (block
>> 24) & 0xff;
1188 /* request too large even for LBA48 */
1191 tf
->nsect
= n_block
& 0xff;
1193 tf
->lbah
= (block
>> 16) & 0xff;
1194 tf
->lbam
= (block
>> 8) & 0xff;
1195 tf
->lbal
= block
& 0xff;
1197 tf
->device
|= ATA_LBA
;
1200 u32 sect
, head
, cyl
, track
;
1202 if (!lba_28_ok(block
, n_block
))
1205 /* Convert LBA to CHS */
1206 track
= (u32
)block
/ dev
->sectors
;
1207 cyl
= track
/ dev
->heads
;
1208 head
= track
% dev
->heads
;
1209 sect
= (u32
)block
% dev
->sectors
+ 1;
1211 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1212 (u32
)block
, track
, cyl
, head
, sect
);
1214 /* Check whether the converted CHS can fit.
1218 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1221 tf
->command
= ATA_CMD_VERIFY
;
1222 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1225 tf
->lbah
= cyl
>> 8;
1232 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1233 /* "Invalid field in cbd" */
1237 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1238 /* "Logical Block Address out of range" */
1242 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1247 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1248 * @qc: Storage for translated ATA taskfile
1249 * @scsicmd: SCSI command to translate
1251 * Converts any of six SCSI read/write commands into the
1252 * ATA counterpart, including starting sector (LBA),
1253 * sector count, and taking into account the device's LBA48
1256 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1257 * %WRITE_16 are currently supported.
1260 * spin_lock_irqsave(host lock)
1263 * Zero on success, non-zero on error.
1266 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
1268 unsigned int tf_flags
= 0;
1273 if (scsicmd
[0] == WRITE_10
|| scsicmd
[0] == WRITE_6
||
1274 scsicmd
[0] == WRITE_16
)
1275 tf_flags
|= ATA_TFLAG_WRITE
;
1277 /* Calculate the SCSI LBA, transfer length and FUA. */
1278 switch (scsicmd
[0]) {
1281 scsi_10_lba_len(scsicmd
, &block
, &n_block
);
1282 if (unlikely(scsicmd
[1] & (1 << 3)))
1283 tf_flags
|= ATA_TFLAG_FUA
;
1287 scsi_6_lba_len(scsicmd
, &block
, &n_block
);
1289 /* for 6-byte r/w commands, transfer length 0
1290 * means 256 blocks of data, not 0 block.
1297 scsi_16_lba_len(scsicmd
, &block
, &n_block
);
1298 if (unlikely(scsicmd
[1] & (1 << 3)))
1299 tf_flags
|= ATA_TFLAG_FUA
;
1302 DPRINTK("no-byte command\n");
1306 /* Check and compose ATA command */
1308 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1309 * length 0 means transfer 0 block of data.
1310 * However, for ATA R/W commands, sector count 0 means
1311 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1313 * WARNING: one or two older ATA drives treat 0 as 0...
1317 qc
->flags
|= ATA_QCFLAG_IO
;
1318 qc
->nsect
= n_block
;
1320 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1322 if (likely(rc
== 0))
1327 /* treat all other errors as -EINVAL, fall through */
1329 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1330 /* "Invalid field in cbd" */
1334 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1335 /* "Logical Block Address out of range" */
1339 qc
->scsicmd
->result
= SAM_STAT_GOOD
;
1343 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1345 struct ata_port
*ap
= qc
->ap
;
1346 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1347 u8
*cdb
= cmd
->cmnd
;
1348 int need_sense
= (qc
->err_mask
!= 0);
1350 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1351 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1354 if (ap
->ops
->error_handler
&&
1355 !need_sense
&& (qc
->tf
.command
== ATA_CMD_SET_FEATURES
) &&
1356 ((qc
->tf
.feature
== SETFEATURES_WC_ON
) ||
1357 (qc
->tf
.feature
== SETFEATURES_WC_OFF
))) {
1358 ap
->eh_info
.action
|= ATA_EH_REVALIDATE
;
1359 ata_port_schedule_eh(ap
);
1362 /* For ATA pass thru (SAT) commands, generate a sense block if
1363 * user mandated it or if there's an error. Note that if we
1364 * generate because the user forced us to, a check condition
1365 * is generated and the ATA register values are returned
1366 * whether the command completed successfully or not. If there
1367 * was no error, SK, ASC and ASCQ will all be zero.
1369 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1370 ((cdb
[2] & 0x20) || need_sense
)) {
1371 ata_gen_passthru_sense(qc
);
1374 cmd
->result
= SAM_STAT_GOOD
;
1376 /* TODO: decide which descriptor format to use
1377 * for 48b LBA devices and call that here
1378 * instead of the fixed desc, which is only
1379 * good for smaller LBA (and maybe CHS?)
1382 ata_gen_ata_sense(qc
);
1386 if (need_sense
&& !ap
->ops
->error_handler
)
1387 ata_dump_status(ap
->id
, &qc
->result_tf
);
1395 * ata_scmd_need_defer - Check whether we need to defer scmd
1396 * @dev: ATA device to which the command is addressed
1397 * @is_io: Is the command IO (and thus possibly NCQ)?
1399 * NCQ and non-NCQ commands cannot run together. As upper layer
1400 * only knows the queue depth, we are responsible for maintaining
1401 * exclusion. This function checks whether a new command can be
1405 * spin_lock_irqsave(host lock)
1408 * 1 if deferring is needed, 0 otherwise.
1410 static int ata_scmd_need_defer(struct ata_device
*dev
, int is_io
)
1412 struct ata_port
*ap
= dev
->ap
;
1414 if (!(dev
->flags
& ATA_DFLAG_NCQ
))
1418 if (!ata_tag_valid(ap
->active_tag
))
1421 if (!ata_tag_valid(ap
->active_tag
) && !ap
->sactive
)
1428 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1429 * @dev: ATA device to which the command is addressed
1430 * @cmd: SCSI command to execute
1431 * @done: SCSI command completion function
1432 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1434 * Our ->queuecommand() function has decided that the SCSI
1435 * command issued can be directly translated into an ATA
1436 * command, rather than handled internally.
1438 * This function sets up an ata_queued_cmd structure for the
1439 * SCSI command, and sends that ata_queued_cmd to the hardware.
1441 * The xlat_func argument (actor) returns 0 if ready to execute
1442 * ATA command, else 1 to finish translation. If 1 is returned
1443 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1444 * to be set reflecting an error condition or clean (early)
1448 * spin_lock_irqsave(host lock)
1451 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1452 * needs to be deferred.
1454 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1455 void (*done
)(struct scsi_cmnd
*),
1456 ata_xlat_func_t xlat_func
)
1458 struct ata_queued_cmd
*qc
;
1459 u8
*scsicmd
= cmd
->cmnd
;
1460 int is_io
= xlat_func
== ata_scsi_rw_xlat
;
1464 if (unlikely(ata_scmd_need_defer(dev
, is_io
)))
1467 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1471 /* data is present; dma-map it */
1472 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1473 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1474 if (unlikely(cmd
->request_bufflen
< 1)) {
1475 ata_dev_printk(dev
, KERN_WARNING
,
1476 "WARNING: zero len r/w req\n");
1481 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1483 ata_sg_init_one(qc
, cmd
->request_buffer
,
1484 cmd
->request_bufflen
);
1486 qc
->dma_dir
= cmd
->sc_data_direction
;
1489 qc
->complete_fn
= ata_scsi_qc_complete
;
1491 if (xlat_func(qc
, scsicmd
))
1494 /* select device, send command to hardware */
1503 DPRINTK("EXIT - early finish (good or error)\n");
1508 cmd
->result
= (DID_ERROR
<< 16);
1511 DPRINTK("EXIT - internal\n");
1515 DPRINTK("EXIT - defer\n");
1516 return SCSI_MLQUEUE_DEVICE_BUSY
;
1520 * ata_scsi_rbuf_get - Map response buffer.
1521 * @cmd: SCSI command containing buffer to be mapped.
1522 * @buf_out: Pointer to mapped area.
1524 * Maps buffer contained within SCSI command @cmd.
1527 * spin_lock_irqsave(host lock)
1530 * Length of response buffer.
1533 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1536 unsigned int buflen
;
1539 struct scatterlist
*sg
;
1541 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1542 buf
= kmap_atomic(sg
->page
, KM_USER0
) + sg
->offset
;
1543 buflen
= sg
->length
;
1545 buf
= cmd
->request_buffer
;
1546 buflen
= cmd
->request_bufflen
;
1554 * ata_scsi_rbuf_put - Unmap response buffer.
1555 * @cmd: SCSI command containing buffer to be unmapped.
1556 * @buf: buffer to unmap
1558 * Unmaps response buffer contained within @cmd.
1561 * spin_lock_irqsave(host lock)
1564 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1567 struct scatterlist
*sg
;
1569 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1570 kunmap_atomic(buf
- sg
->offset
, KM_USER0
);
1575 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1576 * @args: device IDENTIFY data / SCSI command of interest.
1577 * @actor: Callback hook for desired SCSI command simulator
1579 * Takes care of the hard work of simulating a SCSI command...
1580 * Mapping the response buffer, calling the command's handler,
1581 * and handling the handler's return value. This return value
1582 * indicates whether the handler wishes the SCSI command to be
1583 * completed successfully (0), or not (in which case cmd->result
1584 * and sense buffer are assumed to be set).
1587 * spin_lock_irqsave(host lock)
1590 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1591 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1592 u8
*rbuf
, unsigned int buflen
))
1595 unsigned int buflen
, rc
;
1596 struct scsi_cmnd
*cmd
= args
->cmd
;
1598 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1599 memset(rbuf
, 0, buflen
);
1600 rc
= actor(args
, rbuf
, buflen
);
1601 ata_scsi_rbuf_put(cmd
, rbuf
);
1604 cmd
->result
= SAM_STAT_GOOD
;
1609 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1610 * @idx: byte index into SCSI response buffer
1611 * @val: value to set
1613 * To be used by SCSI command simulator functions. This macros
1614 * expects two local variables, u8 *rbuf and unsigned int buflen,
1620 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1621 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1625 * ata_scsiop_inq_std - Simulate INQUIRY command
1626 * @args: device IDENTIFY data / SCSI command of interest.
1627 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1628 * @buflen: Response buffer length.
1630 * Returns standard device identification data associated
1631 * with non-VPD INQUIRY command output.
1634 * spin_lock_irqsave(host lock)
1637 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1638 unsigned int buflen
)
1643 0x5, /* claim SPC-3 version compatibility */
1648 /* set scsi removeable (RMB) bit per ata bit */
1649 if (ata_id_removeable(args
->id
))
1654 memcpy(rbuf
, hdr
, sizeof(hdr
));
1657 memcpy(&rbuf
[8], "ATA ", 8);
1658 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD_OFS
, 16);
1659 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV_OFS
, 4);
1660 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1661 memcpy(&rbuf
[32], "n/a ", 4);
1665 const u8 versions
[] = {
1666 0x60, /* SAM-3 (no version claimed) */
1669 0x20, /* SBC-2 (no version claimed) */
1672 0x60 /* SPC-3 (no version claimed) */
1675 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1682 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1683 * @args: device IDENTIFY data / SCSI command of interest.
1684 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1685 * @buflen: Response buffer length.
1687 * Returns list of inquiry VPD pages available.
1690 * spin_lock_irqsave(host lock)
1693 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1694 unsigned int buflen
)
1696 const u8 pages
[] = {
1697 0x00, /* page 0x00, this page */
1698 0x80, /* page 0x80, unit serial no page */
1699 0x83 /* page 0x83, device ident page */
1701 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1704 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1710 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1711 * @args: device IDENTIFY data / SCSI command of interest.
1712 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1713 * @buflen: Response buffer length.
1715 * Returns ATA device serial number.
1718 * spin_lock_irqsave(host lock)
1721 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1722 unsigned int buflen
)
1726 0x80, /* this page code */
1728 ATA_SERNO_LEN
, /* page len */
1730 memcpy(rbuf
, hdr
, sizeof(hdr
));
1732 if (buflen
> (ATA_SERNO_LEN
+ 4 - 1))
1733 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1734 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1740 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1741 * @args: device IDENTIFY data / SCSI command of interest.
1742 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1743 * @buflen: Response buffer length.
1745 * Yields two logical unit device identification designators:
1746 * - vendor specific ASCII containing the ATA serial number
1747 * - SAT defined "t10 vendor id based" containing ASCII vendor
1748 * name ("ATA "), model and serial numbers.
1751 * spin_lock_irqsave(host lock)
1754 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1755 unsigned int buflen
)
1758 const int sat_model_serial_desc_len
= 68;
1759 const int ata_model_byte_len
= 40;
1761 rbuf
[1] = 0x83; /* this page code */
1764 if (buflen
> (ATA_SERNO_LEN
+ num
+ 3)) {
1765 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1767 rbuf
[num
+ 3] = ATA_SERNO_LEN
;
1769 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1770 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1771 num
+= ATA_SERNO_LEN
;
1773 if (buflen
> (sat_model_serial_desc_len
+ num
+ 3)) {
1774 /* SAT defined lu model and serial numbers descriptor */
1775 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1778 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
1780 memcpy(rbuf
+ num
, "ATA ", 8);
1782 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1783 ATA_ID_PROD_OFS
, ata_model_byte_len
);
1784 num
+= ata_model_byte_len
;
1785 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1786 ATA_ID_SERNO_OFS
, ATA_SERNO_LEN
);
1787 num
+= ATA_SERNO_LEN
;
1789 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
1794 * ata_scsiop_noop - Command handler that simply returns success.
1795 * @args: device IDENTIFY data / SCSI command of interest.
1796 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1797 * @buflen: Response buffer length.
1799 * No operation. Simply returns success to caller, to indicate
1800 * that the caller should successfully complete this SCSI command.
1803 * spin_lock_irqsave(host lock)
1806 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1807 unsigned int buflen
)
1814 * ata_msense_push - Push data onto MODE SENSE data output buffer
1815 * @ptr_io: (input/output) Location to store more output data
1816 * @last: End of output data buffer
1817 * @buf: Pointer to BLOB being added to output buffer
1818 * @buflen: Length of BLOB
1820 * Store MODE SENSE data on an output buffer.
1826 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1827 const u8
*buf
, unsigned int buflen
)
1831 if ((ptr
+ buflen
- 1) > last
)
1834 memcpy(ptr
, buf
, buflen
);
1842 * ata_msense_caching - Simulate MODE SENSE caching info page
1843 * @id: device IDENTIFY data
1844 * @ptr_io: (input/output) Location to store more output data
1845 * @last: End of output data buffer
1847 * Generate a caching info page, which conditionally indicates
1848 * write caching to the SCSI layer, depending on device
1855 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1858 u8 page
[CACHE_MPAGE_LEN
];
1860 memcpy(page
, def_cache_mpage
, sizeof(page
));
1861 if (ata_id_wcache_enabled(id
))
1862 page
[2] |= (1 << 2); /* write cache enable */
1863 if (!ata_id_rahead_enabled(id
))
1864 page
[12] |= (1 << 5); /* disable read ahead */
1866 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1867 return sizeof(page
);
1871 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1872 * @dev: Device associated with this MODE SENSE command
1873 * @ptr_io: (input/output) Location to store more output data
1874 * @last: End of output data buffer
1876 * Generate a generic MODE SENSE control mode page.
1882 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1884 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1885 sizeof(def_control_mpage
));
1886 return sizeof(def_control_mpage
);
1890 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1891 * @dev: Device associated with this MODE SENSE command
1892 * @ptr_io: (input/output) Location to store more output data
1893 * @last: End of output data buffer
1895 * Generate a generic MODE SENSE r/w error recovery page.
1901 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1904 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1905 sizeof(def_rw_recovery_mpage
));
1906 return sizeof(def_rw_recovery_mpage
);
1910 * We can turn this into a real blacklist if it's needed, for now just
1911 * blacklist any Maxtor BANC1G10 revision firmware
1913 static int ata_dev_supports_fua(u16
*id
)
1915 unsigned char model
[41], fw
[9];
1919 if (!ata_id_has_fua(id
))
1922 ata_id_c_string(id
, model
, ATA_ID_PROD_OFS
, sizeof(model
));
1923 ata_id_c_string(id
, fw
, ATA_ID_FW_REV_OFS
, sizeof(fw
));
1925 if (strcmp(model
, "Maxtor"))
1927 if (strcmp(fw
, "BANC1G10"))
1930 return 0; /* blacklisted */
1934 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1935 * @args: device IDENTIFY data / SCSI command of interest.
1936 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1937 * @buflen: Response buffer length.
1939 * Simulate MODE SENSE commands. Assume this is invoked for direct
1940 * access devices (e.g. disks) only. There should be no block
1941 * descriptor for other device types.
1944 * spin_lock_irqsave(host lock)
1947 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1948 unsigned int buflen
)
1950 struct ata_device
*dev
= args
->dev
;
1951 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1952 const u8 sat_blk_desc
[] = {
1953 0, 0, 0, 0, /* number of blocks: sat unspecified */
1955 0, 0x2, 0x0 /* block length: 512 bytes */
1958 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1963 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1964 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1966 * LLBA bit in msense(10) ignored (compliant)
1969 page_control
= scsicmd
[2] >> 6;
1970 switch (page_control
) {
1971 case 0: /* current */
1972 break; /* supported */
1974 goto saving_not_supp
;
1975 case 1: /* changeable */
1976 case 2: /* defaults */
1982 output_len
= 4 + (ebd
? 8 : 0);
1983 alloc_len
= scsicmd
[4];
1985 output_len
= 8 + (ebd
? 8 : 0);
1986 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
1988 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
1990 p
= rbuf
+ output_len
;
1991 last
= rbuf
+ minlen
- 1;
1993 pg
= scsicmd
[2] & 0x3f;
1996 * No mode subpages supported (yet) but asking for _all_
1997 * subpages may be valid
1999 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2003 case RW_RECOVERY_MPAGE
:
2004 output_len
+= ata_msense_rw_recovery(&p
, last
);
2008 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
2011 case CONTROL_MPAGE
: {
2012 output_len
+= ata_msense_ctl_mode(&p
, last
);
2017 output_len
+= ata_msense_rw_recovery(&p
, last
);
2018 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
2019 output_len
+= ata_msense_ctl_mode(&p
, last
);
2022 default: /* invalid page code */
2030 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2031 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2036 rbuf
[0] = output_len
;
2041 rbuf
[3] = sizeof(sat_blk_desc
);
2043 memcpy(rbuf
+ 4, sat_blk_desc
,
2044 sizeof(sat_blk_desc
));
2048 rbuf
[0] = output_len
>> 8;
2050 rbuf
[1] = output_len
;
2055 rbuf
[7] = sizeof(sat_blk_desc
);
2057 memcpy(rbuf
+ 8, sat_blk_desc
,
2058 sizeof(sat_blk_desc
));
2064 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2065 /* "Invalid field in cbd" */
2069 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2070 /* "Saving parameters not supported" */
2075 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2076 * @args: device IDENTIFY data / SCSI command of interest.
2077 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2078 * @buflen: Response buffer length.
2080 * Simulate READ CAPACITY commands.
2085 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
2086 unsigned int buflen
)
2088 u64 last_lba
= args
->dev
->n_sectors
- 1; /* LBA of the last block */
2092 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2093 if (last_lba
>= 0xffffffffULL
)
2094 last_lba
= 0xffffffff;
2096 /* sector count, 32-bit */
2097 ATA_SCSI_RBUF_SET(0, last_lba
>> (8 * 3));
2098 ATA_SCSI_RBUF_SET(1, last_lba
>> (8 * 2));
2099 ATA_SCSI_RBUF_SET(2, last_lba
>> (8 * 1));
2100 ATA_SCSI_RBUF_SET(3, last_lba
);
2103 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE
>> 8);
2104 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE
);
2106 /* sector count, 64-bit */
2107 ATA_SCSI_RBUF_SET(0, last_lba
>> (8 * 7));
2108 ATA_SCSI_RBUF_SET(1, last_lba
>> (8 * 6));
2109 ATA_SCSI_RBUF_SET(2, last_lba
>> (8 * 5));
2110 ATA_SCSI_RBUF_SET(3, last_lba
>> (8 * 4));
2111 ATA_SCSI_RBUF_SET(4, last_lba
>> (8 * 3));
2112 ATA_SCSI_RBUF_SET(5, last_lba
>> (8 * 2));
2113 ATA_SCSI_RBUF_SET(6, last_lba
>> (8 * 1));
2114 ATA_SCSI_RBUF_SET(7, last_lba
);
2117 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE
>> 8);
2118 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE
);
2125 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2126 * @args: device IDENTIFY data / SCSI command of interest.
2127 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2128 * @buflen: Response buffer length.
2130 * Simulate REPORT LUNS command.
2133 * spin_lock_irqsave(host lock)
2136 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
2137 unsigned int buflen
)
2140 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2146 * ata_scsi_set_sense - Set SCSI sense data and status
2147 * @cmd: SCSI request to be handled
2148 * @sk: SCSI-defined sense key
2149 * @asc: SCSI-defined additional sense code
2150 * @ascq: SCSI-defined additional sense code qualifier
2152 * Helper function that builds a valid fixed format, current
2153 * response code and the given sense key (sk), additional sense
2154 * code (asc) and additional sense code qualifier (ascq) with
2155 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2156 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2162 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
2164 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
2166 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
2167 cmd
->sense_buffer
[2] = sk
;
2168 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
2169 cmd
->sense_buffer
[12] = asc
;
2170 cmd
->sense_buffer
[13] = ascq
;
2174 * ata_scsi_badcmd - End a SCSI request with an error
2175 * @cmd: SCSI request to be handled
2176 * @done: SCSI command completion function
2177 * @asc: SCSI-defined additional sense code
2178 * @ascq: SCSI-defined additional sense code qualifier
2180 * Helper function that completes a SCSI command with
2181 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2182 * and the specified additional sense codes.
2185 * spin_lock_irqsave(host lock)
2188 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
2191 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
2196 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2198 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2199 /* FIXME: not quite right; we don't want the
2200 * translation of taskfile registers into
2201 * a sense descriptors, since that's only
2202 * correct for ATA, not ATAPI
2204 ata_gen_passthru_sense(qc
);
2207 qc
->scsidone(qc
->scsicmd
);
2211 /* is it pointless to prefer PIO for "safety reasons"? */
2212 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2214 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2217 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2219 struct ata_port
*ap
= qc
->ap
;
2220 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2222 DPRINTK("ATAPI request sense\n");
2224 /* FIXME: is this needed? */
2225 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
2227 ap
->ops
->tf_read(ap
, &qc
->tf
);
2229 /* fill these in, for the case where they are -not- overwritten */
2230 cmd
->sense_buffer
[0] = 0x70;
2231 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2235 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
2236 qc
->dma_dir
= DMA_FROM_DEVICE
;
2238 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2239 qc
->cdb
[0] = REQUEST_SENSE
;
2240 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2242 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2243 qc
->tf
.command
= ATA_CMD_PACKET
;
2245 if (ata_pio_use_silly(ap
)) {
2246 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2247 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2249 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2250 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2251 qc
->tf
.lbah
= (8 * 1024) >> 8;
2253 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2255 qc
->complete_fn
= atapi_sense_complete
;
2262 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2264 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2265 unsigned int err_mask
= qc
->err_mask
;
2267 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2269 /* handle completion from new EH */
2270 if (unlikely(qc
->ap
->ops
->error_handler
&&
2271 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2273 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2274 /* FIXME: not quite right; we don't want the
2275 * translation of taskfile registers into a
2276 * sense descriptors, since that's only
2277 * correct for ATA, not ATAPI
2279 ata_gen_passthru_sense(qc
);
2282 /* SCSI EH automatically locks door if sdev->locked is
2283 * set. Sometimes door lock request continues to
2284 * fail, for example, when no media is present. This
2285 * creates a loop - SCSI EH issues door lock which
2286 * fails and gets invoked again to acquire sense data
2287 * for the failed command.
2289 * If door lock fails, always clear sdev->locked to
2290 * avoid this infinite loop.
2292 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
)
2293 qc
->dev
->sdev
->locked
= 0;
2295 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2301 /* successful completion or old EH failure path */
2302 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2303 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2304 atapi_request_sense(qc
);
2306 } else if (unlikely(err_mask
)) {
2307 /* FIXME: not quite right; we don't want the
2308 * translation of taskfile registers into
2309 * a sense descriptors, since that's only
2310 * correct for ATA, not ATAPI
2312 ata_gen_passthru_sense(qc
);
2314 u8
*scsicmd
= cmd
->cmnd
;
2316 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2318 unsigned int buflen
;
2320 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2322 /* ATAPI devices typically report zero for their SCSI version,
2323 * and sometimes deviate from the spec WRT response data
2324 * format. If SCSI version is reported as zero like normal,
2325 * then we make the following fixups: 1) Fake MMC-5 version,
2326 * to indicate to the Linux scsi midlayer this is a modern
2327 * device. 2) Ensure response data format / ATAPI information
2328 * are always correct.
2335 ata_scsi_rbuf_put(cmd
, buf
);
2338 cmd
->result
= SAM_STAT_GOOD
;
2345 * atapi_xlat - Initialize PACKET taskfile
2346 * @qc: command structure to be initialized
2347 * @scsicmd: SCSI CDB associated with this PACKET command
2350 * spin_lock_irqsave(host lock)
2353 * Zero on success, non-zero on failure.
2356 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2358 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2359 struct ata_device
*dev
= qc
->dev
;
2360 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2361 int nodata
= (cmd
->sc_data_direction
== DMA_NONE
);
2364 /* Check whether ATAPI DMA is safe */
2365 if (ata_check_atapi_dma(qc
))
2368 memcpy(&qc
->cdb
, scsicmd
, dev
->cdb_len
);
2370 qc
->complete_fn
= atapi_qc_complete
;
2372 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2373 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2374 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2375 DPRINTK("direction: write\n");
2378 qc
->tf
.command
= ATA_CMD_PACKET
;
2380 /* no data, or PIO data xfer */
2381 if (using_pio
|| nodata
) {
2383 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2385 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2386 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2387 qc
->tf
.lbah
= (8 * 1024) >> 8;
2392 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2393 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2395 if (atapi_dmadir
&& (cmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2396 /* some SATA bridges need us to indicate data xfer direction */
2397 qc
->tf
.feature
|= ATAPI_DMADIR
;
2400 qc
->nbytes
= cmd
->request_bufflen
;
2405 static struct ata_device
* ata_find_dev(struct ata_port
*ap
, int id
)
2407 if (likely(id
< ATA_MAX_DEVICES
))
2408 return &ap
->device
[id
];
2412 static struct ata_device
* __ata_scsi_find_dev(struct ata_port
*ap
,
2413 const struct scsi_device
*scsidev
)
2415 /* skip commands not addressed to targets we simulate */
2416 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2419 return ata_find_dev(ap
, scsidev
->id
);
2423 * ata_scsi_dev_enabled - determine if device is enabled
2426 * Determine if commands should be sent to the specified device.
2429 * spin_lock_irqsave(host lock)
2432 * 0 if commands are not allowed / 1 if commands are allowed
2435 static int ata_scsi_dev_enabled(struct ata_device
*dev
)
2437 if (unlikely(!ata_dev_enabled(dev
)))
2440 if (!atapi_enabled
|| (dev
->ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2441 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2442 ata_dev_printk(dev
, KERN_WARNING
,
2443 "WARNING: ATAPI is %s, device ignored.\n",
2444 atapi_enabled
? "not supported with this driver" : "disabled");
2453 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2454 * @ap: ATA port to which the device is attached
2455 * @scsidev: SCSI device from which we derive the ATA device
2457 * Given various information provided in struct scsi_cmnd,
2458 * map that onto an ATA bus, and using that mapping
2459 * determine which ata_device is associated with the
2460 * SCSI command to be sent.
2463 * spin_lock_irqsave(host lock)
2466 * Associated ATA device, or %NULL if not found.
2468 static struct ata_device
*
2469 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2471 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2473 if (unlikely(!dev
|| !ata_scsi_dev_enabled(dev
)))
2480 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2481 * @byte1: Byte 1 from pass-thru CDB.
2484 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2487 ata_scsi_map_proto(u8 byte1
)
2489 switch((byte1
& 0x1e) >> 1) {
2490 case 3: /* Non-data */
2491 return ATA_PROT_NODATA
;
2494 return ATA_PROT_DMA
;
2496 case 4: /* PIO Data-in */
2497 case 5: /* PIO Data-out */
2498 return ATA_PROT_PIO
;
2500 case 10: /* Device Reset */
2501 case 0: /* Hard Reset */
2503 case 2: /* Bus Idle */
2504 case 7: /* Packet */
2505 case 8: /* DMA Queued */
2506 case 9: /* Device Diagnostic */
2507 case 11: /* UDMA Data-in */
2508 case 12: /* UDMA Data-Out */
2509 case 13: /* FPDMA */
2510 default: /* Reserved */
2514 return ATA_PROT_UNKNOWN
;
2518 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2519 * @qc: command structure to be initialized
2520 * @scsicmd: SCSI command to convert
2522 * Handles either 12 or 16-byte versions of the CDB.
2525 * Zero on success, non-zero on failure.
2528 ata_scsi_pass_thru(struct ata_queued_cmd
*qc
, const u8
*scsicmd
)
2530 struct ata_taskfile
*tf
= &(qc
->tf
);
2531 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2532 struct ata_device
*dev
= qc
->dev
;
2534 if ((tf
->protocol
= ata_scsi_map_proto(scsicmd
[1])) == ATA_PROT_UNKNOWN
)
2537 /* We may not issue DMA commands if no DMA mode is set */
2538 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2541 if (scsicmd
[1] & 0xe0)
2542 /* PIO multi not supported yet */
2546 * 12 and 16 byte CDBs use different offsets to
2547 * provide the various register values.
2549 if (scsicmd
[0] == ATA_16
) {
2551 * 16-byte CDB - may contain extended commands.
2553 * If that is the case, copy the upper byte register values.
2555 if (scsicmd
[1] & 0x01) {
2556 tf
->hob_feature
= scsicmd
[3];
2557 tf
->hob_nsect
= scsicmd
[5];
2558 tf
->hob_lbal
= scsicmd
[7];
2559 tf
->hob_lbam
= scsicmd
[9];
2560 tf
->hob_lbah
= scsicmd
[11];
2561 tf
->flags
|= ATA_TFLAG_LBA48
;
2563 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2566 * Always copy low byte, device and command registers.
2568 tf
->feature
= scsicmd
[4];
2569 tf
->nsect
= scsicmd
[6];
2570 tf
->lbal
= scsicmd
[8];
2571 tf
->lbam
= scsicmd
[10];
2572 tf
->lbah
= scsicmd
[12];
2573 tf
->device
= scsicmd
[13];
2574 tf
->command
= scsicmd
[14];
2577 * 12-byte CDB - incapable of extended commands.
2579 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2581 tf
->feature
= scsicmd
[3];
2582 tf
->nsect
= scsicmd
[4];
2583 tf
->lbal
= scsicmd
[5];
2584 tf
->lbam
= scsicmd
[6];
2585 tf
->lbah
= scsicmd
[7];
2586 tf
->device
= scsicmd
[8];
2587 tf
->command
= scsicmd
[9];
2590 * If slave is possible, enforce correct master/slave bit
2592 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2593 tf
->device
= qc
->dev
->devno
?
2594 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2597 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2598 * SET_FEATURES - XFER MODE must be preceded/succeeded
2599 * by an update to hardware-specific registers for each
2600 * controller (i.e. the reason for ->set_piomode(),
2601 * ->set_dmamode(), and ->post_set_mode() hooks).
2603 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2604 && (tf
->feature
== SETFEATURES_XFER
))
2608 * Set flags so that all registers will be written,
2609 * and pass on write indication (used for PIO/DMA
2612 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2614 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
2615 tf
->flags
|= ATA_TFLAG_WRITE
;
2618 * Set transfer length.
2620 * TODO: find out if we need to do more here to
2621 * cover scatter/gather case.
2623 qc
->nsect
= cmd
->request_bufflen
/ ATA_SECT_SIZE
;
2625 /* request result TF */
2626 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
2631 ata_scsi_set_sense(qc
->scsicmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2632 /* "Invalid field in cdb" */
2637 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2639 * @cmd: SCSI command opcode to consider
2641 * Look up the SCSI command given, and determine whether the
2642 * SCSI command is to be translated or simulated.
2645 * Pointer to translation function if possible, %NULL if not.
2648 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2658 return ata_scsi_rw_xlat
;
2660 case SYNCHRONIZE_CACHE
:
2661 if (ata_try_flush_cache(dev
))
2662 return ata_scsi_flush_xlat
;
2667 return ata_scsi_verify_xlat
;
2671 return ata_scsi_pass_thru
;
2674 return ata_scsi_start_stop_xlat
;
2681 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2682 * @ap: ATA port to which the command was being sent
2683 * @cmd: SCSI command to dump
2685 * Prints the contents of a SCSI command via printk().
2688 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2689 struct scsi_cmnd
*cmd
)
2692 struct scsi_device
*scsidev
= cmd
->device
;
2693 u8
*scsicmd
= cmd
->cmnd
;
2695 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2697 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2698 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2699 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2704 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*cmd
,
2705 void (*done
)(struct scsi_cmnd
*),
2706 struct ata_device
*dev
)
2710 if (dev
->class == ATA_DEV_ATA
) {
2711 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2715 rc
= ata_scsi_translate(dev
, cmd
, done
, xlat_func
);
2717 ata_scsi_simulate(dev
, cmd
, done
);
2719 rc
= ata_scsi_translate(dev
, cmd
, done
, atapi_xlat
);
2725 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2726 * @cmd: SCSI command to be sent
2727 * @done: Completion function, called when command is complete
2729 * In some cases, this function translates SCSI commands into
2730 * ATA taskfiles, and queues the taskfiles to be sent to
2731 * hardware. In other cases, this function simulates a
2732 * SCSI device by evaluating and responding to certain
2733 * SCSI commands. This creates the overall effect of
2734 * ATA and ATAPI devices appearing as SCSI devices.
2737 * Releases scsi-layer-held lock, and obtains host lock.
2740 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2743 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2745 struct ata_port
*ap
;
2746 struct ata_device
*dev
;
2747 struct scsi_device
*scsidev
= cmd
->device
;
2748 struct Scsi_Host
*shost
= scsidev
->host
;
2751 ap
= ata_shost_to_port(shost
);
2753 spin_unlock(shost
->host_lock
);
2754 spin_lock(ap
->lock
);
2756 ata_scsi_dump_cdb(ap
, cmd
);
2758 dev
= ata_scsi_find_dev(ap
, scsidev
);
2760 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
2762 cmd
->result
= (DID_BAD_TARGET
<< 16);
2766 spin_unlock(ap
->lock
);
2767 spin_lock(shost
->host_lock
);
2772 * ata_scsi_simulate - simulate SCSI command on ATA device
2773 * @dev: the target device
2774 * @cmd: SCSI command being sent to device.
2775 * @done: SCSI command completion function.
2777 * Interprets and directly executes a select list of SCSI commands
2778 * that can be handled internally.
2781 * spin_lock_irqsave(host lock)
2784 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
2785 void (*done
)(struct scsi_cmnd
*))
2787 struct ata_scsi_args args
;
2788 const u8
*scsicmd
= cmd
->cmnd
;
2795 switch(scsicmd
[0]) {
2796 /* no-op's, complete with success */
2797 case SYNCHRONIZE_CACHE
:
2801 case TEST_UNIT_READY
:
2802 case FORMAT_UNIT
: /* FIXME: correct? */
2803 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2804 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2808 if (scsicmd
[1] & 2) /* is CmdDt set? */
2809 ata_scsi_invalid_field(cmd
, done
);
2810 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2811 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2812 else if (scsicmd
[2] == 0x00)
2813 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2814 else if (scsicmd
[2] == 0x80)
2815 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2816 else if (scsicmd
[2] == 0x83)
2817 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2819 ata_scsi_invalid_field(cmd
, done
);
2824 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2827 case MODE_SELECT
: /* unconditionally return */
2828 case MODE_SELECT_10
: /* bad-field-in-cdb */
2829 ata_scsi_invalid_field(cmd
, done
);
2833 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2836 case SERVICE_ACTION_IN
:
2837 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2838 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2840 ata_scsi_invalid_field(cmd
, done
);
2844 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2847 /* mandatory commands we haven't implemented yet */
2850 /* all other commands */
2852 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2853 /* "Invalid command operation code" */
2859 void ata_scsi_scan_host(struct ata_port
*ap
)
2863 if (ap
->flags
& ATA_FLAG_DISABLED
)
2866 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2867 struct ata_device
*dev
= &ap
->device
[i
];
2868 struct scsi_device
*sdev
;
2870 if (!ata_dev_enabled(dev
) || dev
->sdev
)
2873 sdev
= __scsi_add_device(ap
->scsi_host
, 0, i
, 0, NULL
);
2874 if (!IS_ERR(sdev
)) {
2876 scsi_device_put(sdev
);
2882 * ata_scsi_offline_dev - offline attached SCSI device
2883 * @dev: ATA device to offline attached SCSI device for
2885 * This function is called from ata_eh_hotplug() and responsible
2886 * for taking the SCSI device attached to @dev offline. This
2887 * function is called with host lock which protects dev->sdev
2891 * spin_lock_irqsave(host lock)
2894 * 1 if attached SCSI device exists, 0 otherwise.
2896 int ata_scsi_offline_dev(struct ata_device
*dev
)
2899 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
2906 * ata_scsi_remove_dev - remove attached SCSI device
2907 * @dev: ATA device to remove attached SCSI device for
2909 * This function is called from ata_eh_scsi_hotplug() and
2910 * responsible for removing the SCSI device attached to @dev.
2913 * Kernel thread context (may sleep).
2915 static void ata_scsi_remove_dev(struct ata_device
*dev
)
2917 struct ata_port
*ap
= dev
->ap
;
2918 struct scsi_device
*sdev
;
2919 unsigned long flags
;
2921 /* Alas, we need to grab scan_mutex to ensure SCSI device
2922 * state doesn't change underneath us and thus
2923 * scsi_device_get() always succeeds. The mutex locking can
2924 * be removed if there is __scsi_device_get() interface which
2925 * increments reference counts regardless of device state.
2927 mutex_lock(&ap
->scsi_host
->scan_mutex
);
2928 spin_lock_irqsave(ap
->lock
, flags
);
2930 /* clearing dev->sdev is protected by host lock */
2935 /* If user initiated unplug races with us, sdev can go
2936 * away underneath us after the host lock and
2937 * scan_mutex are released. Hold onto it.
2939 if (scsi_device_get(sdev
) == 0) {
2940 /* The following ensures the attached sdev is
2941 * offline on return from ata_scsi_offline_dev()
2942 * regardless it wins or loses the race
2943 * against this function.
2945 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
2952 spin_unlock_irqrestore(ap
->lock
, flags
);
2953 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
2956 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
2957 sdev
->sdev_gendev
.bus_id
);
2959 scsi_remove_device(sdev
);
2960 scsi_device_put(sdev
);
2965 * ata_scsi_hotplug - SCSI part of hotplug
2966 * @work: Pointer to ATA port to perform SCSI hotplug on
2968 * Perform SCSI part of hotplug. It's executed from a separate
2969 * workqueue after EH completes. This is necessary because SCSI
2970 * hot plugging requires working EH and hot unplugging is
2971 * synchronized with hot plugging with a mutex.
2974 * Kernel thread context (may sleep).
2976 void ata_scsi_hotplug(struct work_struct
*work
)
2978 struct ata_port
*ap
=
2979 container_of(work
, struct ata_port
, hotplug_task
.work
);
2982 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
2983 DPRINTK("ENTER/EXIT - unloading\n");
2989 /* unplug detached devices */
2990 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2991 struct ata_device
*dev
= &ap
->device
[i
];
2992 unsigned long flags
;
2994 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
2997 spin_lock_irqsave(ap
->lock
, flags
);
2998 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
2999 spin_unlock_irqrestore(ap
->lock
, flags
);
3001 ata_scsi_remove_dev(dev
);
3004 /* scan for new ones */
3005 ata_scsi_scan_host(ap
);
3007 /* If we scanned while EH was in progress, scan would have
3008 * failed silently. Requeue if there are enabled but
3009 * unattached devices.
3011 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
3012 struct ata_device
*dev
= &ap
->device
[i
];
3013 if (ata_dev_enabled(dev
) && !dev
->sdev
) {
3014 queue_delayed_work(ata_aux_wq
, &ap
->hotplug_task
, HZ
);
3023 * ata_scsi_user_scan - indication for user-initiated bus scan
3024 * @shost: SCSI host to scan
3025 * @channel: Channel to scan
3029 * This function is called when user explicitly requests bus
3030 * scan. Set probe pending flag and invoke EH.
3033 * SCSI layer (we don't care)
3038 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3039 unsigned int id
, unsigned int lun
)
3041 struct ata_port
*ap
= ata_shost_to_port(shost
);
3042 unsigned long flags
;
3045 if (!ap
->ops
->error_handler
)
3048 if ((channel
!= SCAN_WILD_CARD
&& channel
!= 0) ||
3049 (lun
!= SCAN_WILD_CARD
&& lun
!= 0))
3052 spin_lock_irqsave(ap
->lock
, flags
);
3054 if (id
== SCAN_WILD_CARD
) {
3055 ap
->eh_info
.probe_mask
|= (1 << ATA_MAX_DEVICES
) - 1;
3056 ap
->eh_info
.action
|= ATA_EH_SOFTRESET
;
3058 struct ata_device
*dev
= ata_find_dev(ap
, id
);
3061 ap
->eh_info
.probe_mask
|= 1 << dev
->devno
;
3062 ap
->eh_info
.action
|= ATA_EH_SOFTRESET
;
3063 ap
->eh_info
.flags
|= ATA_EHI_RESUME_LINK
;
3069 ata_port_schedule_eh(ap
);
3070 spin_unlock_irqrestore(ap
->lock
, flags
);
3071 ata_port_wait_eh(ap
);
3073 spin_unlock_irqrestore(ap
->lock
, flags
);
3079 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3080 * @work: Pointer to ATA port to perform scsi_rescan_device()
3082 * After ATA pass thru (SAT) commands are executed successfully,
3083 * libata need to propagate the changes to SCSI layer. This
3084 * function must be executed from ata_aux_wq such that sdev
3085 * attach/detach don't race with rescan.
3088 * Kernel thread context (may sleep).
3090 void ata_scsi_dev_rescan(struct work_struct
*work
)
3092 struct ata_port
*ap
=
3093 container_of(work
, struct ata_port
, scsi_rescan_task
);
3094 unsigned long flags
;
3097 spin_lock_irqsave(ap
->lock
, flags
);
3099 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
3100 struct ata_device
*dev
= &ap
->device
[i
];
3101 struct scsi_device
*sdev
= dev
->sdev
;
3103 if (!ata_dev_enabled(dev
) || !sdev
)
3105 if (scsi_device_get(sdev
))
3108 spin_unlock_irqrestore(ap
->lock
, flags
);
3109 scsi_rescan_device(&(sdev
->sdev_gendev
));
3110 scsi_device_put(sdev
);
3111 spin_lock_irqsave(ap
->lock
, flags
);
3114 spin_unlock_irqrestore(ap
->lock
, flags
);
3118 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3119 * @host: ATA host container for all SAS ports
3120 * @port_info: Information from low-level host driver
3121 * @shost: SCSI host that the scsi device is attached to
3124 * PCI/etc. bus probe sem.
3127 * ata_port pointer on success / NULL on failure.
3130 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3131 struct ata_port_info
*port_info
,
3132 struct Scsi_Host
*shost
)
3134 struct ata_port
*ap
= kzalloc(sizeof(*ap
), GFP_KERNEL
);
3135 struct ata_probe_ent
*ent
;
3140 ent
= ata_probe_ent_alloc(host
->dev
, port_info
);
3146 ata_port_init(ap
, host
, ent
, 0);
3147 ap
->lock
= shost
->host_lock
;
3151 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3154 * ata_sas_port_start - Set port up for dma.
3155 * @ap: Port to initialize
3157 * Called just after data structures for each port are
3158 * initialized. Allocates DMA pad.
3160 * May be used as the port_start() entry in ata_port_operations.
3163 * Inherited from caller.
3165 int ata_sas_port_start(struct ata_port
*ap
)
3167 return ata_pad_alloc(ap
, ap
->dev
);
3169 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3172 * ata_port_stop - Undo ata_sas_port_start()
3173 * @ap: Port to shut down
3175 * Frees the DMA pad.
3177 * May be used as the port_stop() entry in ata_port_operations.
3180 * Inherited from caller.
3183 void ata_sas_port_stop(struct ata_port
*ap
)
3185 ata_pad_free(ap
, ap
->dev
);
3187 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3190 * ata_sas_port_init - Initialize a SATA device
3191 * @ap: SATA port to initialize
3194 * PCI/etc. bus probe sem.
3197 * Zero on success, non-zero on error.
3200 int ata_sas_port_init(struct ata_port
*ap
)
3202 int rc
= ap
->ops
->port_start(ap
);
3205 rc
= ata_bus_probe(ap
);
3209 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3212 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3213 * @ap: SATA port to destroy
3217 void ata_sas_port_destroy(struct ata_port
*ap
)
3219 ap
->ops
->port_stop(ap
);
3222 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3225 * ata_sas_slave_configure - Default slave_config routine for libata devices
3226 * @sdev: SCSI device to configure
3227 * @ap: ATA port to which SCSI device is attached
3233 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3235 ata_scsi_sdev_config(sdev
);
3236 ata_scsi_dev_config(sdev
, ap
->device
);
3239 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3242 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3243 * @cmd: SCSI command to be sent
3244 * @done: Completion function, called when command is complete
3245 * @ap: ATA port to which the command is being sent
3248 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3252 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3253 struct ata_port
*ap
)
3257 ata_scsi_dump_cdb(ap
, cmd
);
3259 if (likely(ata_scsi_dev_enabled(ap
->device
)))
3260 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->device
);
3262 cmd
->result
= (DID_BAD_TARGET
<< 16);
3267 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);