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
);
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 static 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_get_identity - Handler for HDIO_GET_IDENTITY ioctl
153 * @sdev: SCSI device to get identify data for
154 * @arg: User buffer area for identify data
157 * Defined by the SCSI layer. We don't really care.
160 * Zero on success, negative errno on error.
162 static int ata_get_identity(struct scsi_device
*sdev
, void __user
*arg
)
164 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
165 struct ata_device
*dev
= ata_scsi_find_dev(ap
, sdev
);
166 u16 __user
*dst
= arg
;
172 if (copy_to_user(dst
, dev
->id
, ATA_ID_WORDS
* sizeof(u16
)))
175 ata_id_string(dev
->id
, buf
, ATA_ID_PROD
, ATA_ID_PROD_LEN
);
176 if (copy_to_user(dst
+ ATA_ID_PROD
, buf
, ATA_ID_PROD_LEN
))
179 ata_id_string(dev
->id
, buf
, ATA_ID_FW_REV
, ATA_ID_FW_REV_LEN
);
180 if (copy_to_user(dst
+ ATA_ID_FW_REV
, buf
, ATA_ID_FW_REV_LEN
))
183 ata_id_string(dev
->id
, buf
, ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
184 if (copy_to_user(dst
+ ATA_ID_SERNO
, buf
, ATA_ID_SERNO_LEN
))
191 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
192 * @scsidev: Device to which we are issuing command
193 * @arg: User provided data for issuing command
196 * Defined by the SCSI layer. We don't really care.
199 * Zero on success, negative errno on error.
201 int ata_cmd_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
204 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
205 u8 args
[4], *argbuf
= NULL
, *sensebuf
= NULL
;
207 enum dma_data_direction data_dir
;
213 if (copy_from_user(args
, arg
, sizeof(args
)))
216 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
220 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
223 argsize
= SECTOR_SIZE
* args
[3];
224 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
225 if (argbuf
== NULL
) {
230 scsi_cmd
[1] = (4 << 1); /* PIO Data-in */
231 scsi_cmd
[2] = 0x0e; /* no off.line or cc, read from dev,
232 block count in sector count field */
233 data_dir
= DMA_FROM_DEVICE
;
235 scsi_cmd
[1] = (3 << 1); /* Non-data */
236 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
240 scsi_cmd
[0] = ATA_16
;
242 scsi_cmd
[4] = args
[2];
243 if (args
[0] == WIN_SMART
) { /* hack -- ide driver does this too... */
244 scsi_cmd
[6] = args
[3];
245 scsi_cmd
[8] = args
[1];
249 scsi_cmd
[6] = args
[1];
251 scsi_cmd
[14] = args
[0];
253 /* Good values for timeout and retries? Values below
254 from scsi_ioctl_send_command() for default case... */
255 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, data_dir
, argbuf
, argsize
,
256 sensebuf
, (10*HZ
), 5, 0);
258 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
259 u8
*desc
= sensebuf
+ 8;
260 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
262 /* If we set cc then ATA pass-through will cause a
263 * check condition even if no error. Filter that. */
264 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
265 struct scsi_sense_hdr sshdr
;
266 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
268 if (sshdr
.sense_key
==0 &&
269 sshdr
.asc
==0 && sshdr
.ascq
==0)
270 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
273 /* Send userspace a few ATA registers (same as drivers/ide) */
274 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
275 desc
[0] == 0x09 ) { /* code is "ATA Descriptor" */
276 args
[0] = desc
[13]; /* status */
277 args
[1] = desc
[3]; /* error */
278 args
[2] = desc
[5]; /* sector count (0:7) */
279 if (copy_to_user(arg
, args
, sizeof(args
)))
291 && copy_to_user(arg
+ sizeof(args
), argbuf
, argsize
))
300 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
301 * @scsidev: Device to which we are issuing command
302 * @arg: User provided data for issuing command
305 * Defined by the SCSI layer. We don't really care.
308 * Zero on success, negative errno on error.
310 int ata_task_ioctl(struct scsi_device
*scsidev
, void __user
*arg
)
313 u8 scsi_cmd
[MAX_COMMAND_SIZE
];
314 u8 args
[7], *sensebuf
= NULL
;
320 if (copy_from_user(args
, arg
, sizeof(args
)))
323 sensebuf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_NOIO
);
327 memset(scsi_cmd
, 0, sizeof(scsi_cmd
));
328 scsi_cmd
[0] = ATA_16
;
329 scsi_cmd
[1] = (3 << 1); /* Non-data */
330 scsi_cmd
[2] = 0x20; /* cc but no off.line or data xfer */
331 scsi_cmd
[4] = args
[1];
332 scsi_cmd
[6] = args
[2];
333 scsi_cmd
[8] = args
[3];
334 scsi_cmd
[10] = args
[4];
335 scsi_cmd
[12] = args
[5];
336 scsi_cmd
[13] = args
[6] & 0x4f;
337 scsi_cmd
[14] = args
[0];
339 /* Good values for timeout and retries? Values below
340 from scsi_ioctl_send_command() for default case... */
341 cmd_result
= scsi_execute(scsidev
, scsi_cmd
, DMA_NONE
, NULL
, 0,
342 sensebuf
, (10*HZ
), 5, 0);
344 if (driver_byte(cmd_result
) == DRIVER_SENSE
) {/* sense data available */
345 u8
*desc
= sensebuf
+ 8;
346 cmd_result
&= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
348 /* If we set cc then ATA pass-through will cause a
349 * check condition even if no error. Filter that. */
350 if (cmd_result
& SAM_STAT_CHECK_CONDITION
) {
351 struct scsi_sense_hdr sshdr
;
352 scsi_normalize_sense(sensebuf
, SCSI_SENSE_BUFFERSIZE
,
354 if (sshdr
.sense_key
==0 &&
355 sshdr
.asc
==0 && sshdr
.ascq
==0)
356 cmd_result
&= ~SAM_STAT_CHECK_CONDITION
;
359 /* Send userspace ATA registers */
360 if (sensebuf
[0] == 0x72 && /* format is "descriptor" */
361 desc
[0] == 0x09) {/* code is "ATA Descriptor" */
362 args
[0] = desc
[13]; /* status */
363 args
[1] = desc
[3]; /* error */
364 args
[2] = desc
[5]; /* sector count (0:7) */
365 args
[3] = desc
[7]; /* lbal */
366 args
[4] = desc
[9]; /* lbam */
367 args
[5] = desc
[11]; /* lbah */
368 args
[6] = desc
[12]; /* select */
369 if (copy_to_user(arg
, args
, sizeof(args
)))
384 int ata_scsi_ioctl(struct scsi_device
*scsidev
, int cmd
, void __user
*arg
)
386 int val
= -EINVAL
, rc
= -EINVAL
;
389 case ATA_IOC_GET_IO32
:
391 if (copy_to_user(arg
, &val
, 1))
395 case ATA_IOC_SET_IO32
:
396 val
= (unsigned long) arg
;
401 case HDIO_GET_IDENTITY
:
402 return ata_get_identity(scsidev
, arg
);
405 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
407 return ata_cmd_ioctl(scsidev
, arg
);
409 case HDIO_DRIVE_TASK
:
410 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
))
412 return ata_task_ioctl(scsidev
, arg
);
423 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
424 * @dev: ATA device to which the new command is attached
425 * @cmd: SCSI command that originated this ATA command
426 * @done: SCSI command completion function
428 * Obtain a reference to an unused ata_queued_cmd structure,
429 * which is the basic libata structure representing a single
430 * ATA command sent to the hardware.
432 * If a command was available, fill in the SCSI-specific
433 * portions of the structure with information on the
437 * spin_lock_irqsave(host lock)
440 * Command allocated, or %NULL if none available.
442 static struct ata_queued_cmd
*ata_scsi_qc_new(struct ata_device
*dev
,
443 struct scsi_cmnd
*cmd
,
444 void (*done
)(struct scsi_cmnd
*))
446 struct ata_queued_cmd
*qc
;
448 qc
= ata_qc_new_init(dev
);
454 qc
->__sg
= (struct scatterlist
*) cmd
->request_buffer
;
455 qc
->n_elem
= cmd
->use_sg
;
456 } else if (cmd
->request_bufflen
) {
457 qc
->__sg
= &qc
->sgent
;
461 cmd
->result
= (DID_OK
<< 16) | (QUEUE_FULL
<< 1);
469 * ata_dump_status - user friendly display of error info
470 * @id: id of the port in question
471 * @tf: ptr to filled out taskfile
473 * Decode and dump the ATA error/status registers for the user so
474 * that they have some idea what really happened at the non
475 * make-believe layer.
478 * inherited from caller
480 static void ata_dump_status(unsigned id
, struct ata_taskfile
*tf
)
482 u8 stat
= tf
->command
, err
= tf
->feature
;
484 printk(KERN_WARNING
"ata%u: status=0x%02x { ", id
, stat
);
485 if (stat
& ATA_BUSY
) {
486 printk("Busy }\n"); /* Data is not valid in this case */
488 if (stat
& 0x40) printk("DriveReady ");
489 if (stat
& 0x20) printk("DeviceFault ");
490 if (stat
& 0x10) printk("SeekComplete ");
491 if (stat
& 0x08) printk("DataRequest ");
492 if (stat
& 0x04) printk("CorrectedError ");
493 if (stat
& 0x02) printk("Index ");
494 if (stat
& 0x01) printk("Error ");
498 printk(KERN_WARNING
"ata%u: error=0x%02x { ", id
, err
);
499 if (err
& 0x04) printk("DriveStatusError ");
501 if (err
& 0x04) printk("BadCRC ");
502 else printk("Sector ");
504 if (err
& 0x40) printk("UncorrectableError ");
505 if (err
& 0x10) printk("SectorIdNotFound ");
506 if (err
& 0x02) printk("TrackZeroNotFound ");
507 if (err
& 0x01) printk("AddrMarkNotFound ");
514 * ata_to_sense_error - convert ATA error to SCSI error
515 * @id: ATA device number
516 * @drv_stat: value contained in ATA status register
517 * @drv_err: value contained in ATA error register
518 * @sk: the sense key we'll fill out
519 * @asc: the additional sense code we'll fill out
520 * @ascq: the additional sense code qualifier we'll fill out
521 * @verbose: be verbose
523 * Converts an ATA error into a SCSI error. Fill out pointers to
524 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
525 * format sense blocks.
528 * spin_lock_irqsave(host lock)
530 static void ata_to_sense_error(unsigned id
, u8 drv_stat
, u8 drv_err
, u8
*sk
,
531 u8
*asc
, u8
*ascq
, int verbose
)
535 /* Based on the 3ware driver translation table */
536 static const unsigned char sense_table
[][4] = {
538 {0xd1, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
540 {0xd0, ABORTED_COMMAND
, 0x00, 0x00}, // Device busy Aborted command
542 {0x61, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault Hardware error
543 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
544 {0x84, ABORTED_COMMAND
, 0x47, 0x00}, // Data CRC error SCSI parity error
545 /* MC|ID|ABRT|TRK0|MARK */
546 {0x37, NOT_READY
, 0x04, 0x00}, // Unit offline Not ready
548 {0x09, NOT_READY
, 0x04, 0x00}, // Unrecovered disk error Not ready
549 /* Bad address mark */
550 {0x01, MEDIUM_ERROR
, 0x13, 0x00}, // Address mark not found Address mark not found for data field
552 {0x02, HARDWARE_ERROR
, 0x00, 0x00}, // Track 0 not found Hardware error
554 {0x04, ABORTED_COMMAND
, 0x00, 0x00}, // Aborted command Aborted command
555 /* Media change request */
556 {0x08, NOT_READY
, 0x04, 0x00}, // Media change request FIXME: faking offline
558 {0x10, ABORTED_COMMAND
, 0x14, 0x00}, // ID not found Recorded entity not found
560 {0x08, NOT_READY
, 0x04, 0x00}, // Media change FIXME: faking offline
562 {0x40, MEDIUM_ERROR
, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
563 /* BBD - block marked bad */
564 {0x80, MEDIUM_ERROR
, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
565 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
567 static const unsigned char stat_table
[][4] = {
568 /* Must be first because BUSY means no other bits valid */
569 {0x80, ABORTED_COMMAND
, 0x47, 0x00}, // Busy, fake parity for now
570 {0x20, HARDWARE_ERROR
, 0x00, 0x00}, // Device fault
571 {0x08, ABORTED_COMMAND
, 0x47, 0x00}, // Timed out in xfer, fake parity for now
572 {0x04, RECOVERED_ERROR
, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
573 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
577 * Is this an error we can process/parse
579 if (drv_stat
& ATA_BUSY
) {
580 drv_err
= 0; /* Ignore the err bits, they're invalid */
584 /* Look for drv_err */
585 for (i
= 0; sense_table
[i
][0] != 0xFF; i
++) {
586 /* Look for best matches first */
587 if ((sense_table
[i
][0] & drv_err
) ==
589 *sk
= sense_table
[i
][1];
590 *asc
= sense_table
[i
][2];
591 *ascq
= sense_table
[i
][3];
595 /* No immediate match */
597 printk(KERN_WARNING
"ata%u: no sense translation for "
598 "error 0x%02x\n", id
, drv_err
);
601 /* Fall back to interpreting status bits */
602 for (i
= 0; stat_table
[i
][0] != 0xFF; i
++) {
603 if (stat_table
[i
][0] & drv_stat
) {
604 *sk
= stat_table
[i
][1];
605 *asc
= stat_table
[i
][2];
606 *ascq
= stat_table
[i
][3];
610 /* No error? Undecoded? */
612 printk(KERN_WARNING
"ata%u: no sense translation for "
613 "status: 0x%02x\n", id
, drv_stat
);
615 /* We need a sensible error return here, which is tricky, and one
616 that won't cause people to do things like return a disk wrongly */
617 *sk
= ABORTED_COMMAND
;
623 printk(KERN_ERR
"ata%u: translated ATA stat/err 0x%02x/%02x "
624 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
625 id
, drv_stat
, drv_err
, *sk
, *asc
, *ascq
);
630 * ata_gen_passthru_sense - Generate check condition sense block.
631 * @qc: Command that completed.
633 * This function is specific to the ATA descriptor format sense
634 * block specified for the ATA pass through commands. Regardless
635 * of whether the command errored or not, return a sense
636 * block. Copy all controller registers into the sense
637 * block. Clear sense key, ASC & ASCQ if there is no error.
642 static void ata_gen_passthru_sense(struct ata_queued_cmd
*qc
)
644 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
645 struct ata_taskfile
*tf
= &qc
->result_tf
;
646 unsigned char *sb
= cmd
->sense_buffer
;
647 unsigned char *desc
= sb
+ 8;
648 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
650 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
652 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
655 * Use ata_to_sense_error() to map status register bits
656 * onto sense key, asc & ascq.
659 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
660 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
661 &sb
[1], &sb
[2], &sb
[3], verbose
);
666 * Sense data is current and format is descriptor.
672 /* set length of additional sense data */
677 * Copy registers into sense buffer.
680 desc
[3] = tf
->feature
; /* == error reg */
685 desc
[12] = tf
->device
;
686 desc
[13] = tf
->command
; /* == status reg */
689 * Fill in Extend bit, and the high order bytes
692 if (tf
->flags
& ATA_TFLAG_LBA48
) {
694 desc
[4] = tf
->hob_nsect
;
695 desc
[6] = tf
->hob_lbal
;
696 desc
[8] = tf
->hob_lbam
;
697 desc
[10] = tf
->hob_lbah
;
702 * ata_gen_ata_sense - generate a SCSI fixed sense block
703 * @qc: Command that we are erroring out
705 * Generate sense block for a failed ATA command @qc. Descriptor
706 * format is used to accomodate LBA48 block address.
711 static void ata_gen_ata_sense(struct ata_queued_cmd
*qc
)
713 struct ata_device
*dev
= qc
->dev
;
714 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
715 struct ata_taskfile
*tf
= &qc
->result_tf
;
716 unsigned char *sb
= cmd
->sense_buffer
;
717 unsigned char *desc
= sb
+ 8;
718 int verbose
= qc
->ap
->ops
->error_handler
== NULL
;
721 memset(sb
, 0, SCSI_SENSE_BUFFERSIZE
);
723 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
725 /* sense data is current and format is descriptor */
728 /* Use ata_to_sense_error() to map status register bits
729 * onto sense key, asc & ascq.
732 tf
->command
& (ATA_BUSY
| ATA_DF
| ATA_ERR
| ATA_DRQ
)) {
733 ata_to_sense_error(qc
->ap
->print_id
, tf
->command
, tf
->feature
,
734 &sb
[1], &sb
[2], &sb
[3], verbose
);
738 block
= ata_tf_read_block(&qc
->result_tf
, dev
);
740 /* information sense data descriptor */
745 desc
[2] |= 0x80; /* valid */
746 desc
[6] = block
>> 40;
747 desc
[7] = block
>> 32;
748 desc
[8] = block
>> 24;
749 desc
[9] = block
>> 16;
750 desc
[10] = block
>> 8;
754 static void ata_scsi_sdev_config(struct scsi_device
*sdev
)
756 sdev
->use_10_for_rw
= 1;
757 sdev
->use_10_for_ms
= 1;
760 static void ata_scsi_dev_config(struct scsi_device
*sdev
,
761 struct ata_device
*dev
)
763 /* configure max sectors */
764 blk_queue_max_sectors(sdev
->request_queue
, dev
->max_sectors
);
766 /* SATA DMA transfers must be multiples of 4 byte, so
767 * we need to pad ATAPI transfers using an extra sg.
768 * Decrement max hw segments accordingly.
770 if (dev
->class == ATA_DEV_ATAPI
) {
771 request_queue_t
*q
= sdev
->request_queue
;
772 blk_queue_max_hw_segments(q
, q
->max_hw_segments
- 1);
775 if (dev
->flags
& ATA_DFLAG_NCQ
) {
778 depth
= min(sdev
->host
->can_queue
, ata_id_queue_depth(dev
->id
));
779 depth
= min(ATA_MAX_QUEUE
- 1, depth
);
780 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, depth
);
785 * ata_scsi_slave_config - Set SCSI device attributes
786 * @sdev: SCSI device to examine
788 * This is called before we actually start reading
789 * and writing to the device, to configure certain
790 * SCSI mid-layer behaviors.
793 * Defined by SCSI layer. We don't really care.
796 int ata_scsi_slave_config(struct scsi_device
*sdev
)
798 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
799 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, sdev
);
801 ata_scsi_sdev_config(sdev
);
803 blk_queue_max_phys_segments(sdev
->request_queue
, LIBATA_MAX_PRD
);
805 sdev
->manage_start_stop
= 1;
808 ata_scsi_dev_config(sdev
, dev
);
810 return 0; /* scsi layer doesn't check return value, sigh */
814 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
815 * @sdev: SCSI device to be destroyed
817 * @sdev is about to be destroyed for hot/warm unplugging. If
818 * this unplugging was initiated by libata as indicated by NULL
819 * dev->sdev, this function doesn't have to do anything.
820 * Otherwise, SCSI layer initiated warm-unplug is in progress.
821 * Clear dev->sdev, schedule the device for ATA detach and invoke
825 * Defined by SCSI layer. We don't really care.
827 void ata_scsi_slave_destroy(struct scsi_device
*sdev
)
829 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
831 struct ata_device
*dev
;
833 if (!ap
->ops
->error_handler
)
836 spin_lock_irqsave(ap
->lock
, flags
);
837 dev
= __ata_scsi_find_dev(ap
, sdev
);
838 if (dev
&& dev
->sdev
) {
839 /* SCSI device already in CANCEL state, no need to offline it */
841 dev
->flags
|= ATA_DFLAG_DETACH
;
842 ata_port_schedule_eh(ap
);
844 spin_unlock_irqrestore(ap
->lock
, flags
);
848 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
849 * @sdev: SCSI device to configure queue depth for
850 * @queue_depth: new queue depth
852 * This is libata standard hostt->change_queue_depth callback.
853 * SCSI will call into this callback when user tries to set queue
857 * SCSI layer (we don't care)
860 * Newly configured queue depth.
862 int ata_scsi_change_queue_depth(struct scsi_device
*sdev
, int queue_depth
)
864 struct ata_port
*ap
= ata_shost_to_port(sdev
->host
);
865 struct ata_device
*dev
;
868 if (queue_depth
< 1 || queue_depth
== sdev
->queue_depth
)
869 return sdev
->queue_depth
;
871 dev
= ata_scsi_find_dev(ap
, sdev
);
872 if (!dev
|| !ata_dev_enabled(dev
))
873 return sdev
->queue_depth
;
876 spin_lock_irqsave(ap
->lock
, flags
);
877 dev
->flags
&= ~ATA_DFLAG_NCQ_OFF
;
878 if (queue_depth
== 1 || !ata_ncq_enabled(dev
)) {
879 dev
->flags
|= ATA_DFLAG_NCQ_OFF
;
882 spin_unlock_irqrestore(ap
->lock
, flags
);
884 /* limit and apply queue depth */
885 queue_depth
= min(queue_depth
, sdev
->host
->can_queue
);
886 queue_depth
= min(queue_depth
, ata_id_queue_depth(dev
->id
));
887 queue_depth
= min(queue_depth
, ATA_MAX_QUEUE
- 1);
889 if (sdev
->queue_depth
== queue_depth
)
892 scsi_adjust_queue_depth(sdev
, MSG_SIMPLE_TAG
, queue_depth
);
896 /* XXX: for spindown warning */
897 static void ata_delayed_done_timerfn(unsigned long arg
)
899 struct scsi_cmnd
*scmd
= (void *)arg
;
901 scmd
->scsi_done(scmd
);
904 /* XXX: for spindown warning */
905 static void ata_delayed_done(struct scsi_cmnd
*scmd
)
907 static struct timer_list timer
;
909 setup_timer(&timer
, ata_delayed_done_timerfn
, (unsigned long)scmd
);
910 mod_timer(&timer
, jiffies
+ 5 * HZ
);
914 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
915 * @qc: Storage for translated ATA taskfile
917 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
918 * (to start). Perhaps these commands should be preceded by
919 * CHECK POWER MODE to see what power mode the device is already in.
920 * [See SAT revision 5 at www.t10.org]
923 * spin_lock_irqsave(host lock)
926 * Zero on success, non-zero on error.
928 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd
*qc
)
930 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
931 struct ata_taskfile
*tf
= &qc
->tf
;
932 const u8
*cdb
= scmd
->cmnd
;
934 if (scmd
->cmd_len
< 5)
937 tf
->flags
|= ATA_TFLAG_DEVICE
| ATA_TFLAG_ISADDR
;
938 tf
->protocol
= ATA_PROT_NODATA
;
940 ; /* ignore IMMED bit, violates sat-r05 */
943 goto invalid_fld
; /* LOEJ bit set not supported */
944 if (((cdb
[4] >> 4) & 0xf) != 0)
945 goto invalid_fld
; /* power conditions not supported */
947 tf
->nsect
= 1; /* 1 sector, lba=0 */
949 if (qc
->dev
->flags
& ATA_DFLAG_LBA
) {
950 tf
->flags
|= ATA_TFLAG_LBA
;
955 tf
->device
|= ATA_LBA
;
958 tf
->lbal
= 0x1; /* sect */
959 tf
->lbam
= 0x0; /* cyl low */
960 tf
->lbah
= 0x0; /* cyl high */
963 tf
->command
= ATA_CMD_VERIFY
; /* READ VERIFY */
965 /* XXX: This is for backward compatibility, will be
966 * removed. Read Documentation/feature-removal-schedule.txt
969 if ((qc
->dev
->flags
& ATA_DFLAG_SPUNDOWN
) &&
970 (system_state
== SYSTEM_HALT
||
971 system_state
== SYSTEM_POWER_OFF
)) {
972 static unsigned long warned
= 0;
974 if (!test_and_set_bit(0, &warned
)) {
975 ata_dev_printk(qc
->dev
, KERN_WARNING
,
976 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
977 "UPDATE SHUTDOWN UTILITY\n");
978 ata_dev_printk(qc
->dev
, KERN_WARNING
,
979 "For more info, visit "
980 "http://linux-ata.org/shutdown.html\n");
982 /* ->scsi_done is not used, use it for
983 * delayed completion.
985 scmd
->scsi_done
= qc
->scsidone
;
986 qc
->scsidone
= ata_delayed_done
;
988 scmd
->result
= SAM_STAT_GOOD
;
992 /* Issue ATA STANDBY IMMEDIATE command */
993 tf
->command
= ATA_CMD_STANDBYNOW1
;
997 * Standby and Idle condition timers could be implemented but that
998 * would require libata to implement the Power condition mode page
999 * and allow the user to change it. Changing mode pages requires
1000 * MODE SELECT to be implemented.
1006 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1007 /* "Invalid field in cbd" */
1013 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1014 * @qc: Storage for translated ATA taskfile
1016 * Sets up an ATA taskfile to issue FLUSH CACHE or
1020 * spin_lock_irqsave(host lock)
1023 * Zero on success, non-zero on error.
1025 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd
*qc
)
1027 struct ata_taskfile
*tf
= &qc
->tf
;
1029 tf
->flags
|= ATA_TFLAG_DEVICE
;
1030 tf
->protocol
= ATA_PROT_NODATA
;
1032 if (qc
->dev
->flags
& ATA_DFLAG_FLUSH_EXT
)
1033 tf
->command
= ATA_CMD_FLUSH_EXT
;
1035 tf
->command
= ATA_CMD_FLUSH
;
1041 * scsi_6_lba_len - Get LBA and transfer length
1042 * @cdb: SCSI command to translate
1044 * Calculate LBA and transfer length for 6-byte commands.
1048 * @plen: the transfer length
1050 static void scsi_6_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1055 VPRINTK("six-byte command\n");
1057 lba
|= ((u64
)cdb
[2]) << 8;
1058 lba
|= ((u64
)cdb
[3]);
1060 len
|= ((u32
)cdb
[4]);
1067 * scsi_10_lba_len - Get LBA and transfer length
1068 * @cdb: SCSI command to translate
1070 * Calculate LBA and transfer length for 10-byte commands.
1074 * @plen: the transfer length
1076 static void scsi_10_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1081 VPRINTK("ten-byte command\n");
1083 lba
|= ((u64
)cdb
[2]) << 24;
1084 lba
|= ((u64
)cdb
[3]) << 16;
1085 lba
|= ((u64
)cdb
[4]) << 8;
1086 lba
|= ((u64
)cdb
[5]);
1088 len
|= ((u32
)cdb
[7]) << 8;
1089 len
|= ((u32
)cdb
[8]);
1096 * scsi_16_lba_len - Get LBA and transfer length
1097 * @cdb: SCSI command to translate
1099 * Calculate LBA and transfer length for 16-byte commands.
1103 * @plen: the transfer length
1105 static void scsi_16_lba_len(const u8
*cdb
, u64
*plba
, u32
*plen
)
1110 VPRINTK("sixteen-byte command\n");
1112 lba
|= ((u64
)cdb
[2]) << 56;
1113 lba
|= ((u64
)cdb
[3]) << 48;
1114 lba
|= ((u64
)cdb
[4]) << 40;
1115 lba
|= ((u64
)cdb
[5]) << 32;
1116 lba
|= ((u64
)cdb
[6]) << 24;
1117 lba
|= ((u64
)cdb
[7]) << 16;
1118 lba
|= ((u64
)cdb
[8]) << 8;
1119 lba
|= ((u64
)cdb
[9]);
1121 len
|= ((u32
)cdb
[10]) << 24;
1122 len
|= ((u32
)cdb
[11]) << 16;
1123 len
|= ((u32
)cdb
[12]) << 8;
1124 len
|= ((u32
)cdb
[13]);
1131 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1132 * @qc: Storage for translated ATA taskfile
1134 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1137 * spin_lock_irqsave(host lock)
1140 * Zero on success, non-zero on error.
1142 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd
*qc
)
1144 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1145 struct ata_taskfile
*tf
= &qc
->tf
;
1146 struct ata_device
*dev
= qc
->dev
;
1147 u64 dev_sectors
= qc
->dev
->n_sectors
;
1148 const u8
*cdb
= scmd
->cmnd
;
1152 tf
->flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
1153 tf
->protocol
= ATA_PROT_NODATA
;
1155 if (cdb
[0] == VERIFY
) {
1156 if (scmd
->cmd_len
< 10)
1158 scsi_10_lba_len(cdb
, &block
, &n_block
);
1159 } else if (cdb
[0] == VERIFY_16
) {
1160 if (scmd
->cmd_len
< 16)
1162 scsi_16_lba_len(cdb
, &block
, &n_block
);
1168 if (block
>= dev_sectors
)
1170 if ((block
+ n_block
) > dev_sectors
)
1173 if (dev
->flags
& ATA_DFLAG_LBA
) {
1174 tf
->flags
|= ATA_TFLAG_LBA
;
1176 if (lba_28_ok(block
, n_block
)) {
1178 tf
->command
= ATA_CMD_VERIFY
;
1179 tf
->device
|= (block
>> 24) & 0xf;
1180 } else if (lba_48_ok(block
, n_block
)) {
1181 if (!(dev
->flags
& ATA_DFLAG_LBA48
))
1185 tf
->flags
|= ATA_TFLAG_LBA48
;
1186 tf
->command
= ATA_CMD_VERIFY_EXT
;
1188 tf
->hob_nsect
= (n_block
>> 8) & 0xff;
1190 tf
->hob_lbah
= (block
>> 40) & 0xff;
1191 tf
->hob_lbam
= (block
>> 32) & 0xff;
1192 tf
->hob_lbal
= (block
>> 24) & 0xff;
1194 /* request too large even for LBA48 */
1197 tf
->nsect
= n_block
& 0xff;
1199 tf
->lbah
= (block
>> 16) & 0xff;
1200 tf
->lbam
= (block
>> 8) & 0xff;
1201 tf
->lbal
= block
& 0xff;
1203 tf
->device
|= ATA_LBA
;
1206 u32 sect
, head
, cyl
, track
;
1208 if (!lba_28_ok(block
, n_block
))
1211 /* Convert LBA to CHS */
1212 track
= (u32
)block
/ dev
->sectors
;
1213 cyl
= track
/ dev
->heads
;
1214 head
= track
% dev
->heads
;
1215 sect
= (u32
)block
% dev
->sectors
+ 1;
1217 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1218 (u32
)block
, track
, cyl
, head
, sect
);
1220 /* Check whether the converted CHS can fit.
1224 if ((cyl
>> 16) || (head
>> 4) || (sect
>> 8) || (!sect
))
1227 tf
->command
= ATA_CMD_VERIFY
;
1228 tf
->nsect
= n_block
& 0xff; /* Sector count 0 means 256 sectors */
1231 tf
->lbah
= cyl
>> 8;
1238 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1239 /* "Invalid field in cbd" */
1243 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1244 /* "Logical Block Address out of range" */
1248 scmd
->result
= SAM_STAT_GOOD
;
1253 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1254 * @qc: Storage for translated ATA taskfile
1256 * Converts any of six SCSI read/write commands into the
1257 * ATA counterpart, including starting sector (LBA),
1258 * sector count, and taking into account the device's LBA48
1261 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1262 * %WRITE_16 are currently supported.
1265 * spin_lock_irqsave(host lock)
1268 * Zero on success, non-zero on error.
1270 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd
*qc
)
1272 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
1273 const u8
*cdb
= scmd
->cmnd
;
1274 unsigned int tf_flags
= 0;
1279 if (cdb
[0] == WRITE_10
|| cdb
[0] == WRITE_6
|| cdb
[0] == WRITE_16
)
1280 tf_flags
|= ATA_TFLAG_WRITE
;
1282 /* Calculate the SCSI LBA, transfer length and FUA. */
1286 if (unlikely(scmd
->cmd_len
< 10))
1288 scsi_10_lba_len(cdb
, &block
, &n_block
);
1289 if (unlikely(cdb
[1] & (1 << 3)))
1290 tf_flags
|= ATA_TFLAG_FUA
;
1294 if (unlikely(scmd
->cmd_len
< 6))
1296 scsi_6_lba_len(cdb
, &block
, &n_block
);
1298 /* for 6-byte r/w commands, transfer length 0
1299 * means 256 blocks of data, not 0 block.
1306 if (unlikely(scmd
->cmd_len
< 16))
1308 scsi_16_lba_len(cdb
, &block
, &n_block
);
1309 if (unlikely(cdb
[1] & (1 << 3)))
1310 tf_flags
|= ATA_TFLAG_FUA
;
1313 DPRINTK("no-byte command\n");
1317 /* Check and compose ATA command */
1319 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1320 * length 0 means transfer 0 block of data.
1321 * However, for ATA R/W commands, sector count 0 means
1322 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1324 * WARNING: one or two older ATA drives treat 0 as 0...
1328 qc
->flags
|= ATA_QCFLAG_IO
;
1329 qc
->nbytes
= n_block
* ATA_SECT_SIZE
;
1331 rc
= ata_build_rw_tf(&qc
->tf
, qc
->dev
, block
, n_block
, tf_flags
,
1333 if (likely(rc
== 0))
1338 /* treat all other errors as -EINVAL, fall through */
1340 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
1341 /* "Invalid field in cbd" */
1345 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x21, 0x0);
1346 /* "Logical Block Address out of range" */
1350 scmd
->result
= SAM_STAT_GOOD
;
1354 static void ata_scsi_qc_complete(struct ata_queued_cmd
*qc
)
1356 struct ata_port
*ap
= qc
->ap
;
1357 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
1358 u8
*cdb
= cmd
->cmnd
;
1359 int need_sense
= (qc
->err_mask
!= 0);
1361 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1362 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1365 if (ap
->ops
->error_handler
&&
1366 !need_sense
&& (qc
->tf
.command
== ATA_CMD_SET_FEATURES
) &&
1367 ((qc
->tf
.feature
== SETFEATURES_WC_ON
) ||
1368 (qc
->tf
.feature
== SETFEATURES_WC_OFF
))) {
1369 ap
->eh_info
.action
|= ATA_EH_REVALIDATE
;
1370 ata_port_schedule_eh(ap
);
1373 /* For ATA pass thru (SAT) commands, generate a sense block if
1374 * user mandated it or if there's an error. Note that if we
1375 * generate because the user forced us to, a check condition
1376 * is generated and the ATA register values are returned
1377 * whether the command completed successfully or not. If there
1378 * was no error, SK, ASC and ASCQ will all be zero.
1380 if (((cdb
[0] == ATA_16
) || (cdb
[0] == ATA_12
)) &&
1381 ((cdb
[2] & 0x20) || need_sense
)) {
1382 ata_gen_passthru_sense(qc
);
1385 cmd
->result
= SAM_STAT_GOOD
;
1387 /* TODO: decide which descriptor format to use
1388 * for 48b LBA devices and call that here
1389 * instead of the fixed desc, which is only
1390 * good for smaller LBA (and maybe CHS?)
1393 ata_gen_ata_sense(qc
);
1397 /* XXX: track spindown state for spindown skipping and warning */
1398 if (unlikely(qc
->tf
.command
== ATA_CMD_STANDBY
||
1399 qc
->tf
.command
== ATA_CMD_STANDBYNOW1
))
1400 qc
->dev
->flags
|= ATA_DFLAG_SPUNDOWN
;
1401 else if (likely(system_state
!= SYSTEM_HALT
&&
1402 system_state
!= SYSTEM_POWER_OFF
))
1403 qc
->dev
->flags
&= ~ATA_DFLAG_SPUNDOWN
;
1405 if (need_sense
&& !ap
->ops
->error_handler
)
1406 ata_dump_status(ap
->print_id
, &qc
->result_tf
);
1414 * ata_scmd_need_defer - Check whether we need to defer scmd
1415 * @dev: ATA device to which the command is addressed
1416 * @is_io: Is the command IO (and thus possibly NCQ)?
1418 * NCQ and non-NCQ commands cannot run together. As upper layer
1419 * only knows the queue depth, we are responsible for maintaining
1420 * exclusion. This function checks whether a new command can be
1424 * spin_lock_irqsave(host lock)
1427 * 1 if deferring is needed, 0 otherwise.
1429 static int ata_scmd_need_defer(struct ata_device
*dev
, int is_io
)
1431 struct ata_port
*ap
= dev
->ap
;
1432 int is_ncq
= is_io
&& ata_ncq_enabled(dev
);
1435 if (!ata_tag_valid(ap
->active_tag
))
1438 if (!ata_tag_valid(ap
->active_tag
) && !ap
->sactive
)
1445 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1446 * @dev: ATA device to which the command is addressed
1447 * @cmd: SCSI command to execute
1448 * @done: SCSI command completion function
1449 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1451 * Our ->queuecommand() function has decided that the SCSI
1452 * command issued can be directly translated into an ATA
1453 * command, rather than handled internally.
1455 * This function sets up an ata_queued_cmd structure for the
1456 * SCSI command, and sends that ata_queued_cmd to the hardware.
1458 * The xlat_func argument (actor) returns 0 if ready to execute
1459 * ATA command, else 1 to finish translation. If 1 is returned
1460 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1461 * to be set reflecting an error condition or clean (early)
1465 * spin_lock_irqsave(host lock)
1468 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1469 * needs to be deferred.
1471 static int ata_scsi_translate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
1472 void (*done
)(struct scsi_cmnd
*),
1473 ata_xlat_func_t xlat_func
)
1475 struct ata_queued_cmd
*qc
;
1476 int is_io
= xlat_func
== ata_scsi_rw_xlat
;
1480 if (unlikely(ata_scmd_need_defer(dev
, is_io
)))
1483 qc
= ata_scsi_qc_new(dev
, cmd
, done
);
1487 /* data is present; dma-map it */
1488 if (cmd
->sc_data_direction
== DMA_FROM_DEVICE
||
1489 cmd
->sc_data_direction
== DMA_TO_DEVICE
) {
1490 if (unlikely(cmd
->request_bufflen
< 1)) {
1491 ata_dev_printk(dev
, KERN_WARNING
,
1492 "WARNING: zero len r/w req\n");
1497 ata_sg_init(qc
, cmd
->request_buffer
, cmd
->use_sg
);
1499 ata_sg_init_one(qc
, cmd
->request_buffer
,
1500 cmd
->request_bufflen
);
1502 qc
->dma_dir
= cmd
->sc_data_direction
;
1505 qc
->complete_fn
= ata_scsi_qc_complete
;
1510 /* select device, send command to hardware */
1519 DPRINTK("EXIT - early finish (good or error)\n");
1524 cmd
->result
= (DID_ERROR
<< 16);
1527 DPRINTK("EXIT - internal\n");
1531 DPRINTK("EXIT - defer\n");
1532 return SCSI_MLQUEUE_DEVICE_BUSY
;
1536 * ata_scsi_rbuf_get - Map response buffer.
1537 * @cmd: SCSI command containing buffer to be mapped.
1538 * @buf_out: Pointer to mapped area.
1540 * Maps buffer contained within SCSI command @cmd.
1543 * spin_lock_irqsave(host lock)
1546 * Length of response buffer.
1549 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd
*cmd
, u8
**buf_out
)
1552 unsigned int buflen
;
1555 struct scatterlist
*sg
;
1557 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1558 buf
= kmap_atomic(sg
->page
, KM_IRQ0
) + sg
->offset
;
1559 buflen
= sg
->length
;
1561 buf
= cmd
->request_buffer
;
1562 buflen
= cmd
->request_bufflen
;
1570 * ata_scsi_rbuf_put - Unmap response buffer.
1571 * @cmd: SCSI command containing buffer to be unmapped.
1572 * @buf: buffer to unmap
1574 * Unmaps response buffer contained within @cmd.
1577 * spin_lock_irqsave(host lock)
1580 static inline void ata_scsi_rbuf_put(struct scsi_cmnd
*cmd
, u8
*buf
)
1583 struct scatterlist
*sg
;
1585 sg
= (struct scatterlist
*) cmd
->request_buffer
;
1586 kunmap_atomic(buf
- sg
->offset
, KM_IRQ0
);
1591 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1592 * @args: device IDENTIFY data / SCSI command of interest.
1593 * @actor: Callback hook for desired SCSI command simulator
1595 * Takes care of the hard work of simulating a SCSI command...
1596 * Mapping the response buffer, calling the command's handler,
1597 * and handling the handler's return value. This return value
1598 * indicates whether the handler wishes the SCSI command to be
1599 * completed successfully (0), or not (in which case cmd->result
1600 * and sense buffer are assumed to be set).
1603 * spin_lock_irqsave(host lock)
1606 void ata_scsi_rbuf_fill(struct ata_scsi_args
*args
,
1607 unsigned int (*actor
) (struct ata_scsi_args
*args
,
1608 u8
*rbuf
, unsigned int buflen
))
1611 unsigned int buflen
, rc
;
1612 struct scsi_cmnd
*cmd
= args
->cmd
;
1614 buflen
= ata_scsi_rbuf_get(cmd
, &rbuf
);
1615 memset(rbuf
, 0, buflen
);
1616 rc
= actor(args
, rbuf
, buflen
);
1617 ata_scsi_rbuf_put(cmd
, rbuf
);
1620 cmd
->result
= SAM_STAT_GOOD
;
1625 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1626 * @idx: byte index into SCSI response buffer
1627 * @val: value to set
1629 * To be used by SCSI command simulator functions. This macros
1630 * expects two local variables, u8 *rbuf and unsigned int buflen,
1636 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1637 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1641 * ata_scsiop_inq_std - Simulate INQUIRY command
1642 * @args: device IDENTIFY data / SCSI command of interest.
1643 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1644 * @buflen: Response buffer length.
1646 * Returns standard device identification data associated
1647 * with non-VPD INQUIRY command output.
1650 * spin_lock_irqsave(host lock)
1653 unsigned int ata_scsiop_inq_std(struct ata_scsi_args
*args
, u8
*rbuf
,
1654 unsigned int buflen
)
1659 0x5, /* claim SPC-3 version compatibility */
1664 /* set scsi removeable (RMB) bit per ata bit */
1665 if (ata_id_removeable(args
->id
))
1670 memcpy(rbuf
, hdr
, sizeof(hdr
));
1673 memcpy(&rbuf
[8], "ATA ", 8);
1674 ata_id_string(args
->id
, &rbuf
[16], ATA_ID_PROD
, 16);
1675 ata_id_string(args
->id
, &rbuf
[32], ATA_ID_FW_REV
, 4);
1676 if (rbuf
[32] == 0 || rbuf
[32] == ' ')
1677 memcpy(&rbuf
[32], "n/a ", 4);
1681 const u8 versions
[] = {
1682 0x60, /* SAM-3 (no version claimed) */
1685 0x20, /* SBC-2 (no version claimed) */
1688 0x60 /* SPC-3 (no version claimed) */
1691 memcpy(rbuf
+ 59, versions
, sizeof(versions
));
1698 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1699 * @args: device IDENTIFY data / SCSI command of interest.
1700 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1701 * @buflen: Response buffer length.
1703 * Returns list of inquiry VPD pages available.
1706 * spin_lock_irqsave(host lock)
1709 unsigned int ata_scsiop_inq_00(struct ata_scsi_args
*args
, u8
*rbuf
,
1710 unsigned int buflen
)
1712 const u8 pages
[] = {
1713 0x00, /* page 0x00, this page */
1714 0x80, /* page 0x80, unit serial no page */
1715 0x83 /* page 0x83, device ident page */
1717 rbuf
[3] = sizeof(pages
); /* number of supported VPD pages */
1720 memcpy(rbuf
+ 4, pages
, sizeof(pages
));
1726 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1727 * @args: device IDENTIFY data / SCSI command of interest.
1728 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1729 * @buflen: Response buffer length.
1731 * Returns ATA device serial number.
1734 * spin_lock_irqsave(host lock)
1737 unsigned int ata_scsiop_inq_80(struct ata_scsi_args
*args
, u8
*rbuf
,
1738 unsigned int buflen
)
1742 0x80, /* this page code */
1744 ATA_ID_SERNO_LEN
, /* page len */
1746 memcpy(rbuf
, hdr
, sizeof(hdr
));
1748 if (buflen
> (ATA_ID_SERNO_LEN
+ 4 - 1))
1749 ata_id_string(args
->id
, (unsigned char *) &rbuf
[4],
1750 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
1756 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1757 * @args: device IDENTIFY data / SCSI command of interest.
1758 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1759 * @buflen: Response buffer length.
1761 * Yields two logical unit device identification designators:
1762 * - vendor specific ASCII containing the ATA serial number
1763 * - SAT defined "t10 vendor id based" containing ASCII vendor
1764 * name ("ATA "), model and serial numbers.
1767 * spin_lock_irqsave(host lock)
1770 unsigned int ata_scsiop_inq_83(struct ata_scsi_args
*args
, u8
*rbuf
,
1771 unsigned int buflen
)
1774 const int sat_model_serial_desc_len
= 68;
1776 rbuf
[1] = 0x83; /* this page code */
1779 if (buflen
> (ATA_ID_SERNO_LEN
+ num
+ 3)) {
1780 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1782 rbuf
[num
+ 3] = ATA_ID_SERNO_LEN
;
1784 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1785 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
1786 num
+= ATA_ID_SERNO_LEN
;
1788 if (buflen
> (sat_model_serial_desc_len
+ num
+ 3)) {
1789 /* SAT defined lu model and serial numbers descriptor */
1790 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1793 rbuf
[num
+ 3] = sat_model_serial_desc_len
;
1795 memcpy(rbuf
+ num
, "ATA ", 8);
1797 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1798 ATA_ID_PROD
, ATA_ID_PROD_LEN
);
1799 num
+= ATA_ID_PROD_LEN
;
1800 ata_id_string(args
->id
, (unsigned char *) rbuf
+ num
,
1801 ATA_ID_SERNO
, ATA_ID_SERNO_LEN
);
1802 num
+= ATA_ID_SERNO_LEN
;
1804 rbuf
[3] = num
- 4; /* page len (assume less than 256 bytes) */
1809 * ata_scsiop_noop - Command handler that simply returns success.
1810 * @args: device IDENTIFY data / SCSI command of interest.
1811 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1812 * @buflen: Response buffer length.
1814 * No operation. Simply returns success to caller, to indicate
1815 * that the caller should successfully complete this SCSI command.
1818 * spin_lock_irqsave(host lock)
1821 unsigned int ata_scsiop_noop(struct ata_scsi_args
*args
, u8
*rbuf
,
1822 unsigned int buflen
)
1829 * ata_msense_push - Push data onto MODE SENSE data output buffer
1830 * @ptr_io: (input/output) Location to store more output data
1831 * @last: End of output data buffer
1832 * @buf: Pointer to BLOB being added to output buffer
1833 * @buflen: Length of BLOB
1835 * Store MODE SENSE data on an output buffer.
1841 static void ata_msense_push(u8
**ptr_io
, const u8
*last
,
1842 const u8
*buf
, unsigned int buflen
)
1846 if ((ptr
+ buflen
- 1) > last
)
1849 memcpy(ptr
, buf
, buflen
);
1857 * ata_msense_caching - Simulate MODE SENSE caching info page
1858 * @id: device IDENTIFY data
1859 * @ptr_io: (input/output) Location to store more output data
1860 * @last: End of output data buffer
1862 * Generate a caching info page, which conditionally indicates
1863 * write caching to the SCSI layer, depending on device
1870 static unsigned int ata_msense_caching(u16
*id
, u8
**ptr_io
,
1873 u8 page
[CACHE_MPAGE_LEN
];
1875 memcpy(page
, def_cache_mpage
, sizeof(page
));
1876 if (ata_id_wcache_enabled(id
))
1877 page
[2] |= (1 << 2); /* write cache enable */
1878 if (!ata_id_rahead_enabled(id
))
1879 page
[12] |= (1 << 5); /* disable read ahead */
1881 ata_msense_push(ptr_io
, last
, page
, sizeof(page
));
1882 return sizeof(page
);
1886 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1887 * @dev: Device associated with this MODE SENSE command
1888 * @ptr_io: (input/output) Location to store more output data
1889 * @last: End of output data buffer
1891 * Generate a generic MODE SENSE control mode page.
1897 static unsigned int ata_msense_ctl_mode(u8
**ptr_io
, const u8
*last
)
1899 ata_msense_push(ptr_io
, last
, def_control_mpage
,
1900 sizeof(def_control_mpage
));
1901 return sizeof(def_control_mpage
);
1905 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1906 * @dev: Device associated with this MODE SENSE command
1907 * @ptr_io: (input/output) Location to store more output data
1908 * @last: End of output data buffer
1910 * Generate a generic MODE SENSE r/w error recovery page.
1916 static unsigned int ata_msense_rw_recovery(u8
**ptr_io
, const u8
*last
)
1919 ata_msense_push(ptr_io
, last
, def_rw_recovery_mpage
,
1920 sizeof(def_rw_recovery_mpage
));
1921 return sizeof(def_rw_recovery_mpage
);
1925 * We can turn this into a real blacklist if it's needed, for now just
1926 * blacklist any Maxtor BANC1G10 revision firmware
1928 static int ata_dev_supports_fua(u16
*id
)
1930 unsigned char model
[ATA_ID_PROD_LEN
+ 1], fw
[ATA_ID_FW_REV_LEN
+ 1];
1934 if (!ata_id_has_fua(id
))
1937 ata_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
1938 ata_id_c_string(id
, fw
, ATA_ID_FW_REV
, sizeof(fw
));
1940 if (strcmp(model
, "Maxtor"))
1942 if (strcmp(fw
, "BANC1G10"))
1945 return 0; /* blacklisted */
1949 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1950 * @args: device IDENTIFY data / SCSI command of interest.
1951 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1952 * @buflen: Response buffer length.
1954 * Simulate MODE SENSE commands. Assume this is invoked for direct
1955 * access devices (e.g. disks) only. There should be no block
1956 * descriptor for other device types.
1959 * spin_lock_irqsave(host lock)
1962 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args
*args
, u8
*rbuf
,
1963 unsigned int buflen
)
1965 struct ata_device
*dev
= args
->dev
;
1966 u8
*scsicmd
= args
->cmd
->cmnd
, *p
, *last
;
1967 const u8 sat_blk_desc
[] = {
1968 0, 0, 0, 0, /* number of blocks: sat unspecified */
1970 0, 0x2, 0x0 /* block length: 512 bytes */
1973 unsigned int ebd
, page_control
, six_byte
, output_len
, alloc_len
, minlen
;
1978 six_byte
= (scsicmd
[0] == MODE_SENSE
);
1979 ebd
= !(scsicmd
[1] & 0x8); /* dbd bit inverted == edb */
1981 * LLBA bit in msense(10) ignored (compliant)
1984 page_control
= scsicmd
[2] >> 6;
1985 switch (page_control
) {
1986 case 0: /* current */
1987 break; /* supported */
1989 goto saving_not_supp
;
1990 case 1: /* changeable */
1991 case 2: /* defaults */
1997 output_len
= 4 + (ebd
? 8 : 0);
1998 alloc_len
= scsicmd
[4];
2000 output_len
= 8 + (ebd
? 8 : 0);
2001 alloc_len
= (scsicmd
[7] << 8) + scsicmd
[8];
2003 minlen
= (alloc_len
< buflen
) ? alloc_len
: buflen
;
2005 p
= rbuf
+ output_len
;
2006 last
= rbuf
+ minlen
- 1;
2008 pg
= scsicmd
[2] & 0x3f;
2011 * No mode subpages supported (yet) but asking for _all_
2012 * subpages may be valid
2014 if (spg
&& (spg
!= ALL_SUB_MPAGES
))
2018 case RW_RECOVERY_MPAGE
:
2019 output_len
+= ata_msense_rw_recovery(&p
, last
);
2023 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
2026 case CONTROL_MPAGE
: {
2027 output_len
+= ata_msense_ctl_mode(&p
, last
);
2032 output_len
+= ata_msense_rw_recovery(&p
, last
);
2033 output_len
+= ata_msense_caching(args
->id
, &p
, last
);
2034 output_len
+= ata_msense_ctl_mode(&p
, last
);
2037 default: /* invalid page code */
2045 if (ata_dev_supports_fua(args
->id
) && (dev
->flags
& ATA_DFLAG_LBA48
) &&
2046 (!(dev
->flags
& ATA_DFLAG_PIO
) || dev
->multi_count
))
2051 rbuf
[0] = output_len
;
2056 rbuf
[3] = sizeof(sat_blk_desc
);
2058 memcpy(rbuf
+ 4, sat_blk_desc
,
2059 sizeof(sat_blk_desc
));
2063 rbuf
[0] = output_len
>> 8;
2065 rbuf
[1] = output_len
;
2070 rbuf
[7] = sizeof(sat_blk_desc
);
2072 memcpy(rbuf
+ 8, sat_blk_desc
,
2073 sizeof(sat_blk_desc
));
2079 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x24, 0x0);
2080 /* "Invalid field in cbd" */
2084 ata_scsi_set_sense(args
->cmd
, ILLEGAL_REQUEST
, 0x39, 0x0);
2085 /* "Saving parameters not supported" */
2090 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2091 * @args: device IDENTIFY data / SCSI command of interest.
2092 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2093 * @buflen: Response buffer length.
2095 * Simulate READ CAPACITY commands.
2100 unsigned int ata_scsiop_read_cap(struct ata_scsi_args
*args
, u8
*rbuf
,
2101 unsigned int buflen
)
2103 u64 last_lba
= args
->dev
->n_sectors
- 1; /* LBA of the last block */
2107 if (args
->cmd
->cmnd
[0] == READ_CAPACITY
) {
2108 if (last_lba
>= 0xffffffffULL
)
2109 last_lba
= 0xffffffff;
2111 /* sector count, 32-bit */
2112 ATA_SCSI_RBUF_SET(0, last_lba
>> (8 * 3));
2113 ATA_SCSI_RBUF_SET(1, last_lba
>> (8 * 2));
2114 ATA_SCSI_RBUF_SET(2, last_lba
>> (8 * 1));
2115 ATA_SCSI_RBUF_SET(3, last_lba
);
2118 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE
>> 8);
2119 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE
);
2121 /* sector count, 64-bit */
2122 ATA_SCSI_RBUF_SET(0, last_lba
>> (8 * 7));
2123 ATA_SCSI_RBUF_SET(1, last_lba
>> (8 * 6));
2124 ATA_SCSI_RBUF_SET(2, last_lba
>> (8 * 5));
2125 ATA_SCSI_RBUF_SET(3, last_lba
>> (8 * 4));
2126 ATA_SCSI_RBUF_SET(4, last_lba
>> (8 * 3));
2127 ATA_SCSI_RBUF_SET(5, last_lba
>> (8 * 2));
2128 ATA_SCSI_RBUF_SET(6, last_lba
>> (8 * 1));
2129 ATA_SCSI_RBUF_SET(7, last_lba
);
2132 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE
>> 8);
2133 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE
);
2140 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2141 * @args: device IDENTIFY data / SCSI command of interest.
2142 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2143 * @buflen: Response buffer length.
2145 * Simulate REPORT LUNS command.
2148 * spin_lock_irqsave(host lock)
2151 unsigned int ata_scsiop_report_luns(struct ata_scsi_args
*args
, u8
*rbuf
,
2152 unsigned int buflen
)
2155 rbuf
[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2161 * ata_scsi_set_sense - Set SCSI sense data and status
2162 * @cmd: SCSI request to be handled
2163 * @sk: SCSI-defined sense key
2164 * @asc: SCSI-defined additional sense code
2165 * @ascq: SCSI-defined additional sense code qualifier
2167 * Helper function that builds a valid fixed format, current
2168 * response code and the given sense key (sk), additional sense
2169 * code (asc) and additional sense code qualifier (ascq) with
2170 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2171 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2177 void ata_scsi_set_sense(struct scsi_cmnd
*cmd
, u8 sk
, u8 asc
, u8 ascq
)
2179 cmd
->result
= (DRIVER_SENSE
<< 24) | SAM_STAT_CHECK_CONDITION
;
2181 cmd
->sense_buffer
[0] = 0x70; /* fixed format, current */
2182 cmd
->sense_buffer
[2] = sk
;
2183 cmd
->sense_buffer
[7] = 18 - 8; /* additional sense length */
2184 cmd
->sense_buffer
[12] = asc
;
2185 cmd
->sense_buffer
[13] = ascq
;
2189 * ata_scsi_badcmd - End a SCSI request with an error
2190 * @cmd: SCSI request to be handled
2191 * @done: SCSI command completion function
2192 * @asc: SCSI-defined additional sense code
2193 * @ascq: SCSI-defined additional sense code qualifier
2195 * Helper function that completes a SCSI command with
2196 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2197 * and the specified additional sense codes.
2200 * spin_lock_irqsave(host lock)
2203 void ata_scsi_badcmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*), u8 asc
, u8 ascq
)
2206 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, asc
, ascq
);
2211 static void atapi_sense_complete(struct ata_queued_cmd
*qc
)
2213 if (qc
->err_mask
&& ((qc
->err_mask
& AC_ERR_DEV
) == 0)) {
2214 /* FIXME: not quite right; we don't want the
2215 * translation of taskfile registers into
2216 * a sense descriptors, since that's only
2217 * correct for ATA, not ATAPI
2219 ata_gen_passthru_sense(qc
);
2222 qc
->scsidone(qc
->scsicmd
);
2226 /* is it pointless to prefer PIO for "safety reasons"? */
2227 static inline int ata_pio_use_silly(struct ata_port
*ap
)
2229 return (ap
->flags
& ATA_FLAG_PIO_DMA
);
2232 static void atapi_request_sense(struct ata_queued_cmd
*qc
)
2234 struct ata_port
*ap
= qc
->ap
;
2235 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2237 DPRINTK("ATAPI request sense\n");
2239 /* FIXME: is this needed? */
2240 memset(cmd
->sense_buffer
, 0, sizeof(cmd
->sense_buffer
));
2242 ap
->ops
->tf_read(ap
, &qc
->tf
);
2244 /* fill these in, for the case where they are -not- overwritten */
2245 cmd
->sense_buffer
[0] = 0x70;
2246 cmd
->sense_buffer
[2] = qc
->tf
.feature
>> 4;
2250 ata_sg_init_one(qc
, cmd
->sense_buffer
, sizeof(cmd
->sense_buffer
));
2251 qc
->dma_dir
= DMA_FROM_DEVICE
;
2253 memset(&qc
->cdb
, 0, qc
->dev
->cdb_len
);
2254 qc
->cdb
[0] = REQUEST_SENSE
;
2255 qc
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2257 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2258 qc
->tf
.command
= ATA_CMD_PACKET
;
2260 if (ata_pio_use_silly(ap
)) {
2261 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2262 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2264 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2265 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2266 qc
->tf
.lbah
= (8 * 1024) >> 8;
2268 qc
->nbytes
= SCSI_SENSE_BUFFERSIZE
;
2270 qc
->complete_fn
= atapi_sense_complete
;
2277 static void atapi_qc_complete(struct ata_queued_cmd
*qc
)
2279 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
2280 unsigned int err_mask
= qc
->err_mask
;
2282 VPRINTK("ENTER, err_mask 0x%X\n", err_mask
);
2284 /* handle completion from new EH */
2285 if (unlikely(qc
->ap
->ops
->error_handler
&&
2286 (err_mask
|| qc
->flags
& ATA_QCFLAG_SENSE_VALID
))) {
2288 if (!(qc
->flags
& ATA_QCFLAG_SENSE_VALID
)) {
2289 /* FIXME: not quite right; we don't want the
2290 * translation of taskfile registers into a
2291 * sense descriptors, since that's only
2292 * correct for ATA, not ATAPI
2294 ata_gen_passthru_sense(qc
);
2297 /* SCSI EH automatically locks door if sdev->locked is
2298 * set. Sometimes door lock request continues to
2299 * fail, for example, when no media is present. This
2300 * creates a loop - SCSI EH issues door lock which
2301 * fails and gets invoked again to acquire sense data
2302 * for the failed command.
2304 * If door lock fails, always clear sdev->locked to
2305 * avoid this infinite loop.
2307 if (qc
->cdb
[0] == ALLOW_MEDIUM_REMOVAL
)
2308 qc
->dev
->sdev
->locked
= 0;
2310 qc
->scsicmd
->result
= SAM_STAT_CHECK_CONDITION
;
2316 /* successful completion or old EH failure path */
2317 if (unlikely(err_mask
& AC_ERR_DEV
)) {
2318 cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2319 atapi_request_sense(qc
);
2321 } else if (unlikely(err_mask
)) {
2322 /* FIXME: not quite right; we don't want the
2323 * translation of taskfile registers into
2324 * a sense descriptors, since that's only
2325 * correct for ATA, not ATAPI
2327 ata_gen_passthru_sense(qc
);
2329 u8
*scsicmd
= cmd
->cmnd
;
2331 if ((scsicmd
[0] == INQUIRY
) && ((scsicmd
[1] & 0x03) == 0)) {
2333 unsigned int buflen
;
2335 buflen
= ata_scsi_rbuf_get(cmd
, &buf
);
2337 /* ATAPI devices typically report zero for their SCSI version,
2338 * and sometimes deviate from the spec WRT response data
2339 * format. If SCSI version is reported as zero like normal,
2340 * then we make the following fixups: 1) Fake MMC-5 version,
2341 * to indicate to the Linux scsi midlayer this is a modern
2342 * device. 2) Ensure response data format / ATAPI information
2343 * are always correct.
2350 ata_scsi_rbuf_put(cmd
, buf
);
2353 cmd
->result
= SAM_STAT_GOOD
;
2360 * atapi_xlat - Initialize PACKET taskfile
2361 * @qc: command structure to be initialized
2364 * spin_lock_irqsave(host lock)
2367 * Zero on success, non-zero on failure.
2369 static unsigned int atapi_xlat(struct ata_queued_cmd
*qc
)
2371 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2372 struct ata_device
*dev
= qc
->dev
;
2373 int using_pio
= (dev
->flags
& ATA_DFLAG_PIO
);
2374 int nodata
= (scmd
->sc_data_direction
== DMA_NONE
);
2377 /* Check whether ATAPI DMA is safe */
2378 if (ata_check_atapi_dma(qc
))
2381 memset(qc
->cdb
, 0, dev
->cdb_len
);
2382 memcpy(qc
->cdb
, scmd
->cmnd
, scmd
->cmd_len
);
2384 qc
->complete_fn
= atapi_qc_complete
;
2386 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2387 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
) {
2388 qc
->tf
.flags
|= ATA_TFLAG_WRITE
;
2389 DPRINTK("direction: write\n");
2392 qc
->tf
.command
= ATA_CMD_PACKET
;
2394 /* no data, or PIO data xfer */
2395 if (using_pio
|| nodata
) {
2397 qc
->tf
.protocol
= ATA_PROT_ATAPI_NODATA
;
2399 qc
->tf
.protocol
= ATA_PROT_ATAPI
;
2400 qc
->tf
.lbam
= (8 * 1024) & 0xff;
2401 qc
->tf
.lbah
= (8 * 1024) >> 8;
2406 qc
->tf
.protocol
= ATA_PROT_ATAPI_DMA
;
2407 qc
->tf
.feature
|= ATAPI_PKT_DMA
;
2409 if (atapi_dmadir
&& (scmd
->sc_data_direction
!= DMA_TO_DEVICE
))
2410 /* some SATA bridges need us to indicate data xfer direction */
2411 qc
->tf
.feature
|= ATAPI_DMADIR
;
2414 qc
->nbytes
= scmd
->request_bufflen
;
2419 static struct ata_device
* ata_find_dev(struct ata_port
*ap
, int id
)
2421 if (likely(id
< ATA_MAX_DEVICES
))
2422 return &ap
->device
[id
];
2426 static struct ata_device
* __ata_scsi_find_dev(struct ata_port
*ap
,
2427 const struct scsi_device
*scsidev
)
2429 /* skip commands not addressed to targets we simulate */
2430 if (unlikely(scsidev
->channel
|| scsidev
->lun
))
2433 return ata_find_dev(ap
, scsidev
->id
);
2437 * ata_scsi_dev_enabled - determine if device is enabled
2440 * Determine if commands should be sent to the specified device.
2443 * spin_lock_irqsave(host lock)
2446 * 0 if commands are not allowed / 1 if commands are allowed
2449 static int ata_scsi_dev_enabled(struct ata_device
*dev
)
2451 if (unlikely(!ata_dev_enabled(dev
)))
2454 if (!atapi_enabled
|| (dev
->ap
->flags
& ATA_FLAG_NO_ATAPI
)) {
2455 if (unlikely(dev
->class == ATA_DEV_ATAPI
)) {
2456 ata_dev_printk(dev
, KERN_WARNING
,
2457 "WARNING: ATAPI is %s, device ignored.\n",
2458 atapi_enabled
? "not supported with this driver" : "disabled");
2467 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2468 * @ap: ATA port to which the device is attached
2469 * @scsidev: SCSI device from which we derive the ATA device
2471 * Given various information provided in struct scsi_cmnd,
2472 * map that onto an ATA bus, and using that mapping
2473 * determine which ata_device is associated with the
2474 * SCSI command to be sent.
2477 * spin_lock_irqsave(host lock)
2480 * Associated ATA device, or %NULL if not found.
2482 static struct ata_device
*
2483 ata_scsi_find_dev(struct ata_port
*ap
, const struct scsi_device
*scsidev
)
2485 struct ata_device
*dev
= __ata_scsi_find_dev(ap
, scsidev
);
2487 if (unlikely(!dev
|| !ata_scsi_dev_enabled(dev
)))
2494 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2495 * @byte1: Byte 1 from pass-thru CDB.
2498 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2501 ata_scsi_map_proto(u8 byte1
)
2503 switch((byte1
& 0x1e) >> 1) {
2504 case 3: /* Non-data */
2505 return ATA_PROT_NODATA
;
2508 return ATA_PROT_DMA
;
2510 case 4: /* PIO Data-in */
2511 case 5: /* PIO Data-out */
2512 return ATA_PROT_PIO
;
2514 case 10: /* Device Reset */
2515 case 0: /* Hard Reset */
2517 case 2: /* Bus Idle */
2518 case 7: /* Packet */
2519 case 8: /* DMA Queued */
2520 case 9: /* Device Diagnostic */
2521 case 11: /* UDMA Data-in */
2522 case 12: /* UDMA Data-Out */
2523 case 13: /* FPDMA */
2524 default: /* Reserved */
2528 return ATA_PROT_UNKNOWN
;
2532 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2533 * @qc: command structure to be initialized
2535 * Handles either 12 or 16-byte versions of the CDB.
2538 * Zero on success, non-zero on failure.
2540 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd
*qc
)
2542 struct ata_taskfile
*tf
= &(qc
->tf
);
2543 struct scsi_cmnd
*scmd
= qc
->scsicmd
;
2544 struct ata_device
*dev
= qc
->dev
;
2545 const u8
*cdb
= scmd
->cmnd
;
2547 if ((tf
->protocol
= ata_scsi_map_proto(cdb
[1])) == ATA_PROT_UNKNOWN
)
2550 /* We may not issue DMA commands if no DMA mode is set */
2551 if (tf
->protocol
== ATA_PROT_DMA
&& dev
->dma_mode
== 0)
2555 /* PIO multi not supported yet */
2559 * 12 and 16 byte CDBs use different offsets to
2560 * provide the various register values.
2562 if (cdb
[0] == ATA_16
) {
2564 * 16-byte CDB - may contain extended commands.
2566 * If that is the case, copy the upper byte register values.
2568 if (cdb
[1] & 0x01) {
2569 tf
->hob_feature
= cdb
[3];
2570 tf
->hob_nsect
= cdb
[5];
2571 tf
->hob_lbal
= cdb
[7];
2572 tf
->hob_lbam
= cdb
[9];
2573 tf
->hob_lbah
= cdb
[11];
2574 tf
->flags
|= ATA_TFLAG_LBA48
;
2576 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2579 * Always copy low byte, device and command registers.
2581 tf
->feature
= cdb
[4];
2586 tf
->device
= cdb
[13];
2587 tf
->command
= cdb
[14];
2590 * 12-byte CDB - incapable of extended commands.
2592 tf
->flags
&= ~ATA_TFLAG_LBA48
;
2594 tf
->feature
= cdb
[3];
2599 tf
->device
= cdb
[8];
2600 tf
->command
= cdb
[9];
2603 * If slave is possible, enforce correct master/slave bit
2605 if (qc
->ap
->flags
& ATA_FLAG_SLAVE_POSS
)
2606 tf
->device
= qc
->dev
->devno
?
2607 tf
->device
| ATA_DEV1
: tf
->device
& ~ATA_DEV1
;
2609 /* READ/WRITE LONG use a non-standard sect_size */
2610 qc
->sect_size
= ATA_SECT_SIZE
;
2611 switch (tf
->command
) {
2612 case ATA_CMD_READ_LONG
:
2613 case ATA_CMD_READ_LONG_ONCE
:
2614 case ATA_CMD_WRITE_LONG
:
2615 case ATA_CMD_WRITE_LONG_ONCE
:
2616 if (tf
->protocol
!= ATA_PROT_PIO
|| tf
->nsect
!= 1)
2618 qc
->sect_size
= scmd
->request_bufflen
;
2622 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2623 * SET_FEATURES - XFER MODE must be preceded/succeeded
2624 * by an update to hardware-specific registers for each
2625 * controller (i.e. the reason for ->set_piomode(),
2626 * ->set_dmamode(), and ->post_set_mode() hooks).
2628 if ((tf
->command
== ATA_CMD_SET_FEATURES
)
2629 && (tf
->feature
== SETFEATURES_XFER
))
2633 * Set flags so that all registers will be written,
2634 * and pass on write indication (used for PIO/DMA
2637 tf
->flags
|= (ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
);
2639 if (scmd
->sc_data_direction
== DMA_TO_DEVICE
)
2640 tf
->flags
|= ATA_TFLAG_WRITE
;
2643 * Set transfer length.
2645 * TODO: find out if we need to do more here to
2646 * cover scatter/gather case.
2648 qc
->nbytes
= scmd
->request_bufflen
;
2650 /* request result TF */
2651 qc
->flags
|= ATA_QCFLAG_RESULT_TF
;
2656 ata_scsi_set_sense(scmd
, ILLEGAL_REQUEST
, 0x24, 0x00);
2657 /* "Invalid field in cdb" */
2662 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2664 * @cmd: SCSI command opcode to consider
2666 * Look up the SCSI command given, and determine whether the
2667 * SCSI command is to be translated or simulated.
2670 * Pointer to translation function if possible, %NULL if not.
2673 static inline ata_xlat_func_t
ata_get_xlat_func(struct ata_device
*dev
, u8 cmd
)
2683 return ata_scsi_rw_xlat
;
2685 case SYNCHRONIZE_CACHE
:
2686 if (ata_try_flush_cache(dev
))
2687 return ata_scsi_flush_xlat
;
2692 return ata_scsi_verify_xlat
;
2696 return ata_scsi_pass_thru
;
2699 return ata_scsi_start_stop_xlat
;
2706 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2707 * @ap: ATA port to which the command was being sent
2708 * @cmd: SCSI command to dump
2710 * Prints the contents of a SCSI command via printk().
2713 static inline void ata_scsi_dump_cdb(struct ata_port
*ap
,
2714 struct scsi_cmnd
*cmd
)
2717 struct scsi_device
*scsidev
= cmd
->device
;
2718 u8
*scsicmd
= cmd
->cmnd
;
2720 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2722 scsidev
->channel
, scsidev
->id
, scsidev
->lun
,
2723 scsicmd
[0], scsicmd
[1], scsicmd
[2], scsicmd
[3],
2724 scsicmd
[4], scsicmd
[5], scsicmd
[6], scsicmd
[7],
2729 static inline int __ata_scsi_queuecmd(struct scsi_cmnd
*scmd
,
2730 void (*done
)(struct scsi_cmnd
*),
2731 struct ata_device
*dev
)
2735 if (unlikely(!scmd
->cmd_len
|| scmd
->cmd_len
> dev
->cdb_len
)) {
2736 DPRINTK("bad CDB len=%u, max=%u\n",
2737 scmd
->cmd_len
, dev
->cdb_len
);
2738 scmd
->result
= DID_ERROR
<< 16;
2743 if (dev
->class == ATA_DEV_ATA
) {
2744 ata_xlat_func_t xlat_func
= ata_get_xlat_func(dev
,
2748 rc
= ata_scsi_translate(dev
, scmd
, done
, xlat_func
);
2750 ata_scsi_simulate(dev
, scmd
, done
);
2752 rc
= ata_scsi_translate(dev
, scmd
, done
, atapi_xlat
);
2758 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2759 * @cmd: SCSI command to be sent
2760 * @done: Completion function, called when command is complete
2762 * In some cases, this function translates SCSI commands into
2763 * ATA taskfiles, and queues the taskfiles to be sent to
2764 * hardware. In other cases, this function simulates a
2765 * SCSI device by evaluating and responding to certain
2766 * SCSI commands. This creates the overall effect of
2767 * ATA and ATAPI devices appearing as SCSI devices.
2770 * Releases scsi-layer-held lock, and obtains host lock.
2773 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2776 int ata_scsi_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*))
2778 struct ata_port
*ap
;
2779 struct ata_device
*dev
;
2780 struct scsi_device
*scsidev
= cmd
->device
;
2781 struct Scsi_Host
*shost
= scsidev
->host
;
2784 ap
= ata_shost_to_port(shost
);
2786 spin_unlock(shost
->host_lock
);
2787 spin_lock(ap
->lock
);
2789 ata_scsi_dump_cdb(ap
, cmd
);
2791 dev
= ata_scsi_find_dev(ap
, scsidev
);
2793 rc
= __ata_scsi_queuecmd(cmd
, done
, dev
);
2795 cmd
->result
= (DID_BAD_TARGET
<< 16);
2799 spin_unlock(ap
->lock
);
2800 spin_lock(shost
->host_lock
);
2805 * ata_scsi_simulate - simulate SCSI command on ATA device
2806 * @dev: the target device
2807 * @cmd: SCSI command being sent to device.
2808 * @done: SCSI command completion function.
2810 * Interprets and directly executes a select list of SCSI commands
2811 * that can be handled internally.
2814 * spin_lock_irqsave(host lock)
2817 void ata_scsi_simulate(struct ata_device
*dev
, struct scsi_cmnd
*cmd
,
2818 void (*done
)(struct scsi_cmnd
*))
2820 struct ata_scsi_args args
;
2821 const u8
*scsicmd
= cmd
->cmnd
;
2828 switch(scsicmd
[0]) {
2829 /* no-op's, complete with success */
2830 case SYNCHRONIZE_CACHE
:
2834 case TEST_UNIT_READY
:
2835 case FORMAT_UNIT
: /* FIXME: correct? */
2836 case SEND_DIAGNOSTIC
: /* FIXME: correct? */
2837 ata_scsi_rbuf_fill(&args
, ata_scsiop_noop
);
2841 if (scsicmd
[1] & 2) /* is CmdDt set? */
2842 ata_scsi_invalid_field(cmd
, done
);
2843 else if ((scsicmd
[1] & 1) == 0) /* is EVPD clear? */
2844 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_std
);
2845 else if (scsicmd
[2] == 0x00)
2846 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_00
);
2847 else if (scsicmd
[2] == 0x80)
2848 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_80
);
2849 else if (scsicmd
[2] == 0x83)
2850 ata_scsi_rbuf_fill(&args
, ata_scsiop_inq_83
);
2852 ata_scsi_invalid_field(cmd
, done
);
2857 ata_scsi_rbuf_fill(&args
, ata_scsiop_mode_sense
);
2860 case MODE_SELECT
: /* unconditionally return */
2861 case MODE_SELECT_10
: /* bad-field-in-cdb */
2862 ata_scsi_invalid_field(cmd
, done
);
2866 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2869 case SERVICE_ACTION_IN
:
2870 if ((scsicmd
[1] & 0x1f) == SAI_READ_CAPACITY_16
)
2871 ata_scsi_rbuf_fill(&args
, ata_scsiop_read_cap
);
2873 ata_scsi_invalid_field(cmd
, done
);
2877 ata_scsi_rbuf_fill(&args
, ata_scsiop_report_luns
);
2880 /* mandatory commands we haven't implemented yet */
2883 /* all other commands */
2885 ata_scsi_set_sense(cmd
, ILLEGAL_REQUEST
, 0x20, 0x0);
2886 /* "Invalid command operation code" */
2892 int ata_scsi_add_hosts(struct ata_host
*host
, struct scsi_host_template
*sht
)
2896 for (i
= 0; i
< host
->n_ports
; i
++) {
2897 struct ata_port
*ap
= host
->ports
[i
];
2898 struct Scsi_Host
*shost
;
2901 shost
= scsi_host_alloc(sht
, sizeof(struct ata_port
*));
2905 *(struct ata_port
**)&shost
->hostdata
[0] = ap
;
2906 ap
->scsi_host
= shost
;
2908 shost
->transportt
= &ata_scsi_transport_template
;
2909 shost
->unique_id
= ap
->print_id
;
2912 shost
->max_channel
= 1;
2913 shost
->max_cmd_len
= 16;
2915 rc
= scsi_add_host(ap
->scsi_host
, ap
->host
->dev
);
2923 scsi_host_put(host
->ports
[i
]->scsi_host
);
2926 struct Scsi_Host
*shost
= host
->ports
[i
]->scsi_host
;
2928 scsi_remove_host(shost
);
2929 scsi_host_put(shost
);
2934 void ata_scsi_scan_host(struct ata_port
*ap
)
2938 if (ap
->flags
& ATA_FLAG_DISABLED
)
2941 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
2942 struct ata_device
*dev
= &ap
->device
[i
];
2943 struct scsi_device
*sdev
;
2945 if (!ata_dev_enabled(dev
) || dev
->sdev
)
2948 sdev
= __scsi_add_device(ap
->scsi_host
, 0, i
, 0, NULL
);
2949 if (!IS_ERR(sdev
)) {
2951 scsi_device_put(sdev
);
2957 * ata_scsi_offline_dev - offline attached SCSI device
2958 * @dev: ATA device to offline attached SCSI device for
2960 * This function is called from ata_eh_hotplug() and responsible
2961 * for taking the SCSI device attached to @dev offline. This
2962 * function is called with host lock which protects dev->sdev
2966 * spin_lock_irqsave(host lock)
2969 * 1 if attached SCSI device exists, 0 otherwise.
2971 int ata_scsi_offline_dev(struct ata_device
*dev
)
2974 scsi_device_set_state(dev
->sdev
, SDEV_OFFLINE
);
2981 * ata_scsi_remove_dev - remove attached SCSI device
2982 * @dev: ATA device to remove attached SCSI device for
2984 * This function is called from ata_eh_scsi_hotplug() and
2985 * responsible for removing the SCSI device attached to @dev.
2988 * Kernel thread context (may sleep).
2990 static void ata_scsi_remove_dev(struct ata_device
*dev
)
2992 struct ata_port
*ap
= dev
->ap
;
2993 struct scsi_device
*sdev
;
2994 unsigned long flags
;
2996 /* Alas, we need to grab scan_mutex to ensure SCSI device
2997 * state doesn't change underneath us and thus
2998 * scsi_device_get() always succeeds. The mutex locking can
2999 * be removed if there is __scsi_device_get() interface which
3000 * increments reference counts regardless of device state.
3002 mutex_lock(&ap
->scsi_host
->scan_mutex
);
3003 spin_lock_irqsave(ap
->lock
, flags
);
3005 /* clearing dev->sdev is protected by host lock */
3010 /* If user initiated unplug races with us, sdev can go
3011 * away underneath us after the host lock and
3012 * scan_mutex are released. Hold onto it.
3014 if (scsi_device_get(sdev
) == 0) {
3015 /* The following ensures the attached sdev is
3016 * offline on return from ata_scsi_offline_dev()
3017 * regardless it wins or loses the race
3018 * against this function.
3020 scsi_device_set_state(sdev
, SDEV_OFFLINE
);
3027 spin_unlock_irqrestore(ap
->lock
, flags
);
3028 mutex_unlock(&ap
->scsi_host
->scan_mutex
);
3031 ata_dev_printk(dev
, KERN_INFO
, "detaching (SCSI %s)\n",
3032 sdev
->sdev_gendev
.bus_id
);
3034 scsi_remove_device(sdev
);
3035 scsi_device_put(sdev
);
3040 * ata_scsi_hotplug - SCSI part of hotplug
3041 * @work: Pointer to ATA port to perform SCSI hotplug on
3043 * Perform SCSI part of hotplug. It's executed from a separate
3044 * workqueue after EH completes. This is necessary because SCSI
3045 * hot plugging requires working EH and hot unplugging is
3046 * synchronized with hot plugging with a mutex.
3049 * Kernel thread context (may sleep).
3051 void ata_scsi_hotplug(struct work_struct
*work
)
3053 struct ata_port
*ap
=
3054 container_of(work
, struct ata_port
, hotplug_task
.work
);
3057 if (ap
->pflags
& ATA_PFLAG_UNLOADING
) {
3058 DPRINTK("ENTER/EXIT - unloading\n");
3064 /* unplug detached devices */
3065 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
3066 struct ata_device
*dev
= &ap
->device
[i
];
3067 unsigned long flags
;
3069 if (!(dev
->flags
& ATA_DFLAG_DETACHED
))
3072 spin_lock_irqsave(ap
->lock
, flags
);
3073 dev
->flags
&= ~ATA_DFLAG_DETACHED
;
3074 spin_unlock_irqrestore(ap
->lock
, flags
);
3076 ata_scsi_remove_dev(dev
);
3079 /* scan for new ones */
3080 ata_scsi_scan_host(ap
);
3082 /* If we scanned while EH was in progress, scan would have
3083 * failed silently. Requeue if there are enabled but
3084 * unattached devices.
3086 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
3087 struct ata_device
*dev
= &ap
->device
[i
];
3088 if (ata_dev_enabled(dev
) && !dev
->sdev
) {
3089 queue_delayed_work(ata_aux_wq
, &ap
->hotplug_task
,
3090 round_jiffies_relative(HZ
));
3099 * ata_scsi_user_scan - indication for user-initiated bus scan
3100 * @shost: SCSI host to scan
3101 * @channel: Channel to scan
3105 * This function is called when user explicitly requests bus
3106 * scan. Set probe pending flag and invoke EH.
3109 * SCSI layer (we don't care)
3114 static int ata_scsi_user_scan(struct Scsi_Host
*shost
, unsigned int channel
,
3115 unsigned int id
, unsigned int lun
)
3117 struct ata_port
*ap
= ata_shost_to_port(shost
);
3118 unsigned long flags
;
3121 if (!ap
->ops
->error_handler
)
3124 if ((channel
!= SCAN_WILD_CARD
&& channel
!= 0) ||
3125 (lun
!= SCAN_WILD_CARD
&& lun
!= 0))
3128 spin_lock_irqsave(ap
->lock
, flags
);
3130 if (id
== SCAN_WILD_CARD
) {
3131 ap
->eh_info
.probe_mask
|= (1 << ATA_MAX_DEVICES
) - 1;
3132 ap
->eh_info
.action
|= ATA_EH_SOFTRESET
;
3134 struct ata_device
*dev
= ata_find_dev(ap
, id
);
3137 ap
->eh_info
.probe_mask
|= 1 << dev
->devno
;
3138 ap
->eh_info
.action
|= ATA_EH_SOFTRESET
;
3139 ap
->eh_info
.flags
|= ATA_EHI_RESUME_LINK
;
3145 ata_port_schedule_eh(ap
);
3146 spin_unlock_irqrestore(ap
->lock
, flags
);
3147 ata_port_wait_eh(ap
);
3149 spin_unlock_irqrestore(ap
->lock
, flags
);
3155 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3156 * @work: Pointer to ATA port to perform scsi_rescan_device()
3158 * After ATA pass thru (SAT) commands are executed successfully,
3159 * libata need to propagate the changes to SCSI layer. This
3160 * function must be executed from ata_aux_wq such that sdev
3161 * attach/detach don't race with rescan.
3164 * Kernel thread context (may sleep).
3166 void ata_scsi_dev_rescan(struct work_struct
*work
)
3168 struct ata_port
*ap
=
3169 container_of(work
, struct ata_port
, scsi_rescan_task
);
3170 unsigned long flags
;
3173 spin_lock_irqsave(ap
->lock
, flags
);
3175 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
3176 struct ata_device
*dev
= &ap
->device
[i
];
3177 struct scsi_device
*sdev
= dev
->sdev
;
3179 if (!ata_dev_enabled(dev
) || !sdev
)
3181 if (scsi_device_get(sdev
))
3184 spin_unlock_irqrestore(ap
->lock
, flags
);
3185 scsi_rescan_device(&(sdev
->sdev_gendev
));
3186 scsi_device_put(sdev
);
3187 spin_lock_irqsave(ap
->lock
, flags
);
3190 spin_unlock_irqrestore(ap
->lock
, flags
);
3194 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3195 * @host: ATA host container for all SAS ports
3196 * @port_info: Information from low-level host driver
3197 * @shost: SCSI host that the scsi device is attached to
3200 * PCI/etc. bus probe sem.
3203 * ata_port pointer on success / NULL on failure.
3206 struct ata_port
*ata_sas_port_alloc(struct ata_host
*host
,
3207 struct ata_port_info
*port_info
,
3208 struct Scsi_Host
*shost
)
3210 struct ata_port
*ap
;
3212 ap
= ata_port_alloc(host
);
3217 ap
->lock
= shost
->host_lock
;
3218 ap
->pio_mask
= port_info
->pio_mask
;
3219 ap
->mwdma_mask
= port_info
->mwdma_mask
;
3220 ap
->udma_mask
= port_info
->udma_mask
;
3221 ap
->flags
|= port_info
->flags
;
3222 ap
->ops
= port_info
->port_ops
;
3223 ap
->cbl
= ATA_CBL_SATA
;
3227 EXPORT_SYMBOL_GPL(ata_sas_port_alloc
);
3230 * ata_sas_port_start - Set port up for dma.
3231 * @ap: Port to initialize
3233 * Called just after data structures for each port are
3234 * initialized. Allocates DMA pad.
3236 * May be used as the port_start() entry in ata_port_operations.
3239 * Inherited from caller.
3241 int ata_sas_port_start(struct ata_port
*ap
)
3243 return ata_pad_alloc(ap
, ap
->dev
);
3245 EXPORT_SYMBOL_GPL(ata_sas_port_start
);
3248 * ata_port_stop - Undo ata_sas_port_start()
3249 * @ap: Port to shut down
3251 * Frees the DMA pad.
3253 * May be used as the port_stop() entry in ata_port_operations.
3256 * Inherited from caller.
3259 void ata_sas_port_stop(struct ata_port
*ap
)
3261 ata_pad_free(ap
, ap
->dev
);
3263 EXPORT_SYMBOL_GPL(ata_sas_port_stop
);
3266 * ata_sas_port_init - Initialize a SATA device
3267 * @ap: SATA port to initialize
3270 * PCI/etc. bus probe sem.
3273 * Zero on success, non-zero on error.
3276 int ata_sas_port_init(struct ata_port
*ap
)
3278 int rc
= ap
->ops
->port_start(ap
);
3281 ap
->print_id
= ata_print_id
++;
3282 rc
= ata_bus_probe(ap
);
3287 EXPORT_SYMBOL_GPL(ata_sas_port_init
);
3290 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3291 * @ap: SATA port to destroy
3295 void ata_sas_port_destroy(struct ata_port
*ap
)
3297 if (ap
->ops
->port_stop
)
3298 ap
->ops
->port_stop(ap
);
3301 EXPORT_SYMBOL_GPL(ata_sas_port_destroy
);
3304 * ata_sas_slave_configure - Default slave_config routine for libata devices
3305 * @sdev: SCSI device to configure
3306 * @ap: ATA port to which SCSI device is attached
3312 int ata_sas_slave_configure(struct scsi_device
*sdev
, struct ata_port
*ap
)
3314 ata_scsi_sdev_config(sdev
);
3315 ata_scsi_dev_config(sdev
, ap
->device
);
3318 EXPORT_SYMBOL_GPL(ata_sas_slave_configure
);
3321 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3322 * @cmd: SCSI command to be sent
3323 * @done: Completion function, called when command is complete
3324 * @ap: ATA port to which the command is being sent
3327 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3331 int ata_sas_queuecmd(struct scsi_cmnd
*cmd
, void (*done
)(struct scsi_cmnd
*),
3332 struct ata_port
*ap
)
3336 ata_scsi_dump_cdb(ap
, cmd
);
3338 if (likely(ata_scsi_dev_enabled(ap
->device
)))
3339 rc
= __ata_scsi_queuecmd(cmd
, done
, ap
->device
);
3341 cmd
->result
= (DID_BAD_TARGET
<< 16);
3346 EXPORT_SYMBOL_GPL(ata_sas_queuecmd
);