2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_eh.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_request.h>
44 #include <linux/libata.h>
45 #include <linux/hdreg.h>
46 #include <asm/uaccess.h>
50 #define SECTOR_SIZE 512
52 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
53 static struct ata_device *
54 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
56 #define RW_RECOVERY_MPAGE 0x1
57 #define RW_RECOVERY_MPAGE_LEN 12
58 #define CACHE_MPAGE 0x8
59 #define CACHE_MPAGE_LEN 20
60 #define CONTROL_MPAGE 0xa
61 #define CONTROL_MPAGE_LEN 12
62 #define ALL_MPAGES 0x3f
63 #define ALL_SUB_MPAGES 0xff
66 static const u8 def_rw_recovery_mpage[] = {
68 RW_RECOVERY_MPAGE_LEN - 2,
69 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
70 (1 << 6), /* ARRE (auto read reallocation) */
71 0, /* read retry count */
73 0, /* write retry count */
77 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
80 0, /* contains WCE, needs to be 0 for logic */
81 0, 0, 0, 0, 0, 0, 0, 0, 0,
82 0, /* contains DRA, needs to be 0 for logic */
86 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
88 CONTROL_MPAGE_LEN - 2,
89 2, /* DSENSE=0, GLTSD=1 */
90 0, /* [QAM+QERR may be 1, see 05-359r1] */
91 0, 0, 0, 0, 0xff, 0xff,
92 0, 30 /* extended self test time, see 05-359r1 */
96 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
97 void (*done)(struct scsi_cmnd *))
99 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
100 /* "Invalid field in cbd" */
105 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
106 * @sdev: SCSI device for which BIOS geometry is to be determined
107 * @bdev: block device associated with @sdev
108 * @capacity: capacity of SCSI device
109 * @geom: location to which geometry will be output
111 * Generic bios head/sector/cylinder calculator
112 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
113 * mapping. Some situations may arise where the disk is not
114 * bootable if this is not used.
117 * Defined by the SCSI layer. We don't really care.
122 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
123 sector_t capacity, int geom[])
127 sector_div(capacity, 255*63);
134 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
135 * @scsidev: Device to which we are issuing command
136 * @arg: User provided data for issuing command
139 * Defined by the SCSI layer. We don't really care.
142 * Zero on success, negative errno on error.
145 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
148 u8 scsi_cmd[MAX_COMMAND_SIZE];
149 u8 args[4], *argbuf = NULL;
151 struct scsi_sense_hdr sshdr;
152 enum dma_data_direction data_dir;
157 if (copy_from_user(args, arg, sizeof(args)))
160 memset(scsi_cmd, 0, sizeof(scsi_cmd));
163 argsize = SECTOR_SIZE * args[3];
164 argbuf = kmalloc(argsize, GFP_KERNEL);
165 if (argbuf == NULL) {
170 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
171 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
172 block count in sector count field */
173 data_dir = DMA_FROM_DEVICE;
175 scsi_cmd[1] = (3 << 1); /* Non-data */
176 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
180 scsi_cmd[0] = ATA_16;
182 scsi_cmd[4] = args[2];
183 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
184 scsi_cmd[6] = args[3];
185 scsi_cmd[8] = args[1];
189 scsi_cmd[6] = args[1];
191 scsi_cmd[14] = args[0];
193 /* Good values for timeout and retries? Values below
194 from scsi_ioctl_send_command() for default case... */
195 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
196 &sshdr, (10*HZ), 5)) {
201 /* Need code to retrieve data from check condition? */
204 && copy_to_user(arg + sizeof(args), argbuf, argsize))
214 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
215 * @scsidev: Device to which we are issuing command
216 * @arg: User provided data for issuing command
219 * Defined by the SCSI layer. We don't really care.
222 * Zero on success, negative errno on error.
224 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
227 u8 scsi_cmd[MAX_COMMAND_SIZE];
229 struct scsi_sense_hdr sshdr;
234 if (copy_from_user(args, arg, sizeof(args)))
237 memset(scsi_cmd, 0, sizeof(scsi_cmd));
238 scsi_cmd[0] = ATA_16;
239 scsi_cmd[1] = (3 << 1); /* Non-data */
240 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
241 scsi_cmd[4] = args[1];
242 scsi_cmd[6] = args[2];
243 scsi_cmd[8] = args[3];
244 scsi_cmd[10] = args[4];
245 scsi_cmd[12] = args[5];
246 scsi_cmd[14] = args[0];
248 /* Good values for timeout and retries? Values below
249 from scsi_ioctl_send_command() for default case... */
250 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
254 /* Need code to retrieve data from check condition? */
258 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
261 struct ata_device *dev;
262 int val = -EINVAL, rc = -EINVAL;
264 ap = (struct ata_port *) &scsidev->host->hostdata[0];
268 dev = ata_scsi_find_dev(ap, scsidev);
275 case ATA_IOC_GET_IO32:
277 if (copy_to_user(arg, &val, 1))
281 case ATA_IOC_SET_IO32:
282 val = (unsigned long) arg;
288 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
290 return ata_cmd_ioctl(scsidev, arg);
292 case HDIO_DRIVE_TASK:
293 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
295 return ata_task_ioctl(scsidev, arg);
307 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
308 * @ap: ATA port to which the new command is attached
309 * @dev: ATA device to which the new command is attached
310 * @cmd: SCSI command that originated this ATA command
311 * @done: SCSI command completion function
313 * Obtain a reference to an unused ata_queued_cmd structure,
314 * which is the basic libata structure representing a single
315 * ATA command sent to the hardware.
317 * If a command was available, fill in the SCSI-specific
318 * portions of the structure with information on the
322 * spin_lock_irqsave(host_set lock)
325 * Command allocated, or %NULL if none available.
327 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
328 struct ata_device *dev,
329 struct scsi_cmnd *cmd,
330 void (*done)(struct scsi_cmnd *))
332 struct ata_queued_cmd *qc;
334 qc = ata_qc_new_init(ap, dev);
340 qc->__sg = (struct scatterlist *) cmd->request_buffer;
341 qc->n_elem = cmd->use_sg;
343 qc->__sg = &qc->sgent;
347 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
355 * ata_dump_status - user friendly display of error info
356 * @id: id of the port in question
357 * @tf: ptr to filled out taskfile
359 * Decode and dump the ATA error/status registers for the user so
360 * that they have some idea what really happened at the non
361 * make-believe layer.
364 * inherited from caller
366 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
368 u8 stat = tf->command, err = tf->feature;
370 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
371 if (stat & ATA_BUSY) {
372 printk("Busy }\n"); /* Data is not valid in this case */
374 if (stat & 0x40) printk("DriveReady ");
375 if (stat & 0x20) printk("DeviceFault ");
376 if (stat & 0x10) printk("SeekComplete ");
377 if (stat & 0x08) printk("DataRequest ");
378 if (stat & 0x04) printk("CorrectedError ");
379 if (stat & 0x02) printk("Index ");
380 if (stat & 0x01) printk("Error ");
384 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
385 if (err & 0x04) printk("DriveStatusError ");
387 if (err & 0x04) printk("BadCRC ");
388 else printk("Sector ");
390 if (err & 0x40) printk("UncorrectableError ");
391 if (err & 0x10) printk("SectorIdNotFound ");
392 if (err & 0x02) printk("TrackZeroNotFound ");
393 if (err & 0x01) printk("AddrMarkNotFound ");
399 int ata_scsi_device_resume(struct scsi_device *sdev)
401 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
402 struct ata_device *dev = &ap->device[sdev->id];
404 return ata_device_resume(ap, dev);
407 int ata_scsi_device_suspend(struct scsi_device *sdev)
409 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
410 struct ata_device *dev = &ap->device[sdev->id];
412 return ata_device_suspend(ap, dev);
416 * ata_to_sense_error - convert ATA error to SCSI error
417 * @id: ATA device number
418 * @drv_stat: value contained in ATA status register
419 * @drv_err: value contained in ATA error register
420 * @sk: the sense key we'll fill out
421 * @asc: the additional sense code we'll fill out
422 * @ascq: the additional sense code qualifier we'll fill out
424 * Converts an ATA error into a SCSI error. Fill out pointers to
425 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
426 * format sense blocks.
429 * spin_lock_irqsave(host_set lock)
431 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
436 /* Based on the 3ware driver translation table */
437 static const unsigned char sense_table[][4] = {
439 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
441 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
443 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
444 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
445 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
446 /* MC|ID|ABRT|TRK0|MARK */
447 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
449 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
450 /* Bad address mark */
451 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
453 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
455 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
456 /* Media change request */
457 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
459 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
461 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
463 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
464 /* BBD - block marked bad */
465 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
466 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
468 static const unsigned char stat_table[][4] = {
469 /* Must be first because BUSY means no other bits valid */
470 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
471 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
472 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
473 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
474 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
478 * Is this an error we can process/parse
480 if (drv_stat & ATA_BUSY) {
481 drv_err = 0; /* Ignore the err bits, they're invalid */
485 /* Look for drv_err */
486 for (i = 0; sense_table[i][0] != 0xFF; i++) {
487 /* Look for best matches first */
488 if ((sense_table[i][0] & drv_err) ==
490 *sk = sense_table[i][1];
491 *asc = sense_table[i][2];
492 *ascq = sense_table[i][3];
496 /* No immediate match */
497 printk(KERN_WARNING "ata%u: no sense translation for "
498 "error 0x%02x\n", id, drv_err);
501 /* Fall back to interpreting status bits */
502 for (i = 0; stat_table[i][0] != 0xFF; i++) {
503 if (stat_table[i][0] & drv_stat) {
504 *sk = stat_table[i][1];
505 *asc = stat_table[i][2];
506 *ascq = stat_table[i][3];
510 /* No error? Undecoded? */
511 printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
514 /* For our last chance pick, use medium read error because
515 * it's much more common than an ATA drive telling you a write
519 *asc = 0x11; /* "unrecovered read error" */
520 *ascq = 0x04; /* "auto-reallocation failed" */
523 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
524 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
530 * ata_gen_ata_desc_sense - Generate check condition sense block.
531 * @qc: Command that completed.
533 * This function is specific to the ATA descriptor format sense
534 * block specified for the ATA pass through commands. Regardless
535 * of whether the command errored or not, return a sense
536 * block. Copy all controller registers into the sense
537 * block. Clear sense key, ASC & ASCQ if there is no error.
540 * spin_lock_irqsave(host_set lock)
542 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
544 struct scsi_cmnd *cmd = qc->scsicmd;
545 struct ata_taskfile *tf = &qc->tf;
546 unsigned char *sb = cmd->sense_buffer;
547 unsigned char *desc = sb + 8;
549 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
551 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
554 * Read the controller registers.
556 assert(NULL != qc->ap->ops->tf_read);
557 qc->ap->ops->tf_read(qc->ap, tf);
560 * Use ata_to_sense_error() to map status register bits
561 * onto sense key, asc & ascq.
563 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
564 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
565 &sb[1], &sb[2], &sb[3]);
570 * Sense data is current and format is descriptor.
577 * Set length of additional sense data.
578 * Since we only populate descriptor 0, the total
579 * length is the same (fixed) length as descriptor 0.
581 desc[1] = sb[7] = 14;
584 * Copy registers into sense buffer.
587 desc[3] = tf->feature; /* == error reg */
592 desc[12] = tf->device;
593 desc[13] = tf->command; /* == status reg */
596 * Fill in Extend bit, and the high order bytes
599 if (tf->flags & ATA_TFLAG_LBA48) {
601 desc[4] = tf->hob_nsect;
602 desc[6] = tf->hob_lbal;
603 desc[8] = tf->hob_lbam;
604 desc[10] = tf->hob_lbah;
609 * ata_gen_fixed_sense - generate a SCSI fixed sense block
610 * @qc: Command that we are erroring out
612 * Leverage ata_to_sense_error() to give us the codes. Fit our
613 * LBA in here if there's room.
616 * inherited from caller
618 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
620 struct scsi_cmnd *cmd = qc->scsicmd;
621 struct ata_taskfile *tf = &qc->tf;
622 unsigned char *sb = cmd->sense_buffer;
624 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
626 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
629 * Read the controller registers.
631 assert(NULL != qc->ap->ops->tf_read);
632 qc->ap->ops->tf_read(qc->ap, tf);
635 * Use ata_to_sense_error() to map status register bits
636 * onto sense key, asc & ascq.
638 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
639 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
640 &sb[2], &sb[12], &sb[13]);
647 if (tf->flags & ATA_TFLAG_LBA48) {
648 /* TODO: find solution for LBA48 descriptors */
651 else if (tf->flags & ATA_TFLAG_LBA) {
652 /* A small (28b) LBA will fit in the 32b info field */
653 sb[0] |= 0x80; /* set valid bit */
654 sb[3] = tf->device & 0x0f;
666 * ata_scsi_slave_config - Set SCSI device attributes
667 * @sdev: SCSI device to examine
669 * This is called before we actually start reading
670 * and writing to the device, to configure certain
671 * SCSI mid-layer behaviors.
674 * Defined by SCSI layer. We don't really care.
677 int ata_scsi_slave_config(struct scsi_device *sdev)
679 sdev->use_10_for_rw = 1;
680 sdev->use_10_for_ms = 1;
682 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
684 if (sdev->id < ATA_MAX_DEVICES) {
686 struct ata_device *dev;
688 ap = (struct ata_port *) &sdev->host->hostdata[0];
689 dev = &ap->device[sdev->id];
691 /* TODO: 1024 is an arbitrary number, not the
692 * hardware maximum. This should be increased to
693 * 65534 when Jens Axboe's patch for dynamically
694 * determining max_sectors is merged.
696 if ((dev->flags & ATA_DFLAG_LBA48) &&
697 ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) {
699 * do not overwrite sdev->host->max_sectors, since
700 * other drives on this host may not support LBA48
702 blk_queue_max_sectors(sdev->request_queue, 2048);
706 * SATA DMA transfers must be multiples of 4 byte, so
707 * we need to pad ATAPI transfers using an extra sg.
708 * Decrement max hw segments accordingly.
710 if (dev->class == ATA_DEV_ATAPI) {
711 request_queue_t *q = sdev->request_queue;
712 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
716 return 0; /* scsi layer doesn't check return value, sigh */
720 * ata_scsi_error - SCSI layer error handler callback
721 * @host: SCSI host on which error occurred
723 * Handles SCSI-layer-thrown error events.
726 * Inherited from SCSI layer (none, can sleep)
732 int ata_scsi_error(struct Scsi_Host *host)
739 ap = (struct ata_port *) &host->hostdata[0];
741 spin_lock_irqsave(&ap->host_set->lock, flags);
742 assert(!(ap->flags & ATA_FLAG_IN_EH));
743 ap->flags |= ATA_FLAG_IN_EH;
744 spin_unlock_irqrestore(&ap->host_set->lock, flags);
746 ap->ops->eng_timeout(ap);
748 assert(host->host_failed == 0 && list_empty(&host->eh_cmd_q));
750 scsi_eh_flush_done_q(&ap->eh_done_q);
752 spin_lock_irqsave(&ap->host_set->lock, flags);
753 ap->flags &= ~ATA_FLAG_IN_EH;
754 spin_unlock_irqrestore(&ap->host_set->lock, flags);
760 static void ata_eh_scsidone(struct scsi_cmnd *scmd)
765 static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
767 struct ata_port *ap = qc->ap;
768 struct scsi_cmnd *scmd = qc->scsicmd;
771 spin_lock_irqsave(&ap->host_set->lock, flags);
772 qc->scsidone = ata_eh_scsidone;
773 __ata_qc_complete(qc);
774 assert(!ata_tag_valid(qc->tag));
775 spin_unlock_irqrestore(&ap->host_set->lock, flags);
777 scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
781 * ata_eh_qc_complete - Complete an active ATA command from EH
782 * @qc: Command to complete
784 * Indicate to the mid and upper layers that an ATA command has
785 * completed. To be used from EH.
787 void ata_eh_qc_complete(struct ata_queued_cmd *qc)
789 struct scsi_cmnd *scmd = qc->scsicmd;
790 scmd->retries = scmd->allowed;
791 __ata_eh_qc_complete(qc);
795 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
796 * @qc: Command to retry
798 * Indicate to the mid and upper layers that an ATA command
799 * should be retried. To be used from EH.
801 * SCSI midlayer limits the number of retries to scmd->allowed.
802 * This function might need to adjust scmd->retries for commands
803 * which get retried due to unrelated NCQ failures.
805 void ata_eh_qc_retry(struct ata_queued_cmd *qc)
807 __ata_eh_qc_complete(qc);
811 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
812 * @qc: Storage for translated ATA taskfile
813 * @scsicmd: SCSI command to translate
815 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
816 * (to start). Perhaps these commands should be preceded by
817 * CHECK POWER MODE to see what power mode the device is already in.
818 * [See SAT revision 5 at www.t10.org]
821 * spin_lock_irqsave(host_set lock)
824 * Zero on success, non-zero on error.
827 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
830 struct ata_taskfile *tf = &qc->tf;
832 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
833 tf->protocol = ATA_PROT_NODATA;
834 if (scsicmd[1] & 0x1) {
835 ; /* ignore IMMED bit, violates sat-r05 */
837 if (scsicmd[4] & 0x2)
838 goto invalid_fld; /* LOEJ bit set not supported */
839 if (((scsicmd[4] >> 4) & 0xf) != 0)
840 goto invalid_fld; /* power conditions not supported */
841 if (scsicmd[4] & 0x1) {
842 tf->nsect = 1; /* 1 sector, lba=0 */
844 if (qc->dev->flags & ATA_DFLAG_LBA) {
845 qc->tf.flags |= ATA_TFLAG_LBA;
850 tf->device |= ATA_LBA;
853 tf->lbal = 0x1; /* sect */
854 tf->lbam = 0x0; /* cyl low */
855 tf->lbah = 0x0; /* cyl high */
858 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
860 tf->nsect = 0; /* time period value (0 implies now) */
861 tf->command = ATA_CMD_STANDBY;
862 /* Consider: ATA STANDBY IMMEDIATE command */
865 * Standby and Idle condition timers could be implemented but that
866 * would require libata to implement the Power condition mode page
867 * and allow the user to change it. Changing mode pages requires
868 * MODE SELECT to be implemented.
874 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
875 /* "Invalid field in cbd" */
881 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
882 * @qc: Storage for translated ATA taskfile
883 * @scsicmd: SCSI command to translate (ignored)
885 * Sets up an ATA taskfile to issue FLUSH CACHE or
889 * spin_lock_irqsave(host_set lock)
892 * Zero on success, non-zero on error.
895 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
897 struct ata_taskfile *tf = &qc->tf;
899 tf->flags |= ATA_TFLAG_DEVICE;
900 tf->protocol = ATA_PROT_NODATA;
902 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
903 (ata_id_has_flush_ext(qc->dev->id)))
904 tf->command = ATA_CMD_FLUSH_EXT;
906 tf->command = ATA_CMD_FLUSH;
912 * scsi_6_lba_len - Get LBA and transfer length
913 * @scsicmd: SCSI command to translate
915 * Calculate LBA and transfer length for 6-byte commands.
919 * @plen: the transfer length
922 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
927 VPRINTK("six-byte command\n");
929 lba |= ((u64)scsicmd[2]) << 8;
930 lba |= ((u64)scsicmd[3]);
932 len |= ((u32)scsicmd[4]);
939 * scsi_10_lba_len - Get LBA and transfer length
940 * @scsicmd: SCSI command to translate
942 * Calculate LBA and transfer length for 10-byte commands.
946 * @plen: the transfer length
949 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
954 VPRINTK("ten-byte command\n");
956 lba |= ((u64)scsicmd[2]) << 24;
957 lba |= ((u64)scsicmd[3]) << 16;
958 lba |= ((u64)scsicmd[4]) << 8;
959 lba |= ((u64)scsicmd[5]);
961 len |= ((u32)scsicmd[7]) << 8;
962 len |= ((u32)scsicmd[8]);
969 * scsi_16_lba_len - Get LBA and transfer length
970 * @scsicmd: SCSI command to translate
972 * Calculate LBA and transfer length for 16-byte commands.
976 * @plen: the transfer length
979 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
984 VPRINTK("sixteen-byte command\n");
986 lba |= ((u64)scsicmd[2]) << 56;
987 lba |= ((u64)scsicmd[3]) << 48;
988 lba |= ((u64)scsicmd[4]) << 40;
989 lba |= ((u64)scsicmd[5]) << 32;
990 lba |= ((u64)scsicmd[6]) << 24;
991 lba |= ((u64)scsicmd[7]) << 16;
992 lba |= ((u64)scsicmd[8]) << 8;
993 lba |= ((u64)scsicmd[9]);
995 len |= ((u32)scsicmd[10]) << 24;
996 len |= ((u32)scsicmd[11]) << 16;
997 len |= ((u32)scsicmd[12]) << 8;
998 len |= ((u32)scsicmd[13]);
1005 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1006 * @qc: Storage for translated ATA taskfile
1007 * @scsicmd: SCSI command to translate
1009 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1012 * spin_lock_irqsave(host_set lock)
1015 * Zero on success, non-zero on error.
1018 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1020 struct ata_taskfile *tf = &qc->tf;
1021 struct ata_device *dev = qc->dev;
1022 u64 dev_sectors = qc->dev->n_sectors;
1026 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1027 tf->protocol = ATA_PROT_NODATA;
1029 if (scsicmd[0] == VERIFY)
1030 scsi_10_lba_len(scsicmd, &block, &n_block);
1031 else if (scsicmd[0] == VERIFY_16)
1032 scsi_16_lba_len(scsicmd, &block, &n_block);
1038 if (block >= dev_sectors)
1040 if ((block + n_block) > dev_sectors)
1043 if (dev->flags & ATA_DFLAG_LBA) {
1044 tf->flags |= ATA_TFLAG_LBA;
1046 if (lba_28_ok(block, n_block)) {
1048 tf->command = ATA_CMD_VERIFY;
1049 tf->device |= (block >> 24) & 0xf;
1050 } else if (lba_48_ok(block, n_block)) {
1051 if (!(dev->flags & ATA_DFLAG_LBA48))
1055 tf->flags |= ATA_TFLAG_LBA48;
1056 tf->command = ATA_CMD_VERIFY_EXT;
1058 tf->hob_nsect = (n_block >> 8) & 0xff;
1060 tf->hob_lbah = (block >> 40) & 0xff;
1061 tf->hob_lbam = (block >> 32) & 0xff;
1062 tf->hob_lbal = (block >> 24) & 0xff;
1064 /* request too large even for LBA48 */
1067 tf->nsect = n_block & 0xff;
1069 tf->lbah = (block >> 16) & 0xff;
1070 tf->lbam = (block >> 8) & 0xff;
1071 tf->lbal = block & 0xff;
1073 tf->device |= ATA_LBA;
1076 u32 sect, head, cyl, track;
1078 if (!lba_28_ok(block, n_block))
1081 /* Convert LBA to CHS */
1082 track = (u32)block / dev->sectors;
1083 cyl = track / dev->heads;
1084 head = track % dev->heads;
1085 sect = (u32)block % dev->sectors + 1;
1087 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1088 (u32)block, track, cyl, head, sect);
1090 /* Check whether the converted CHS can fit.
1094 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1097 tf->command = ATA_CMD_VERIFY;
1098 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1101 tf->lbah = cyl >> 8;
1108 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1109 /* "Invalid field in cbd" */
1113 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1114 /* "Logical Block Address out of range" */
1118 qc->scsicmd->result = SAM_STAT_GOOD;
1123 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1124 * @qc: Storage for translated ATA taskfile
1125 * @scsicmd: SCSI command to translate
1127 * Converts any of six SCSI read/write commands into the
1128 * ATA counterpart, including starting sector (LBA),
1129 * sector count, and taking into account the device's LBA48
1132 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1133 * %WRITE_16 are currently supported.
1136 * spin_lock_irqsave(host_set lock)
1139 * Zero on success, non-zero on error.
1142 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1144 struct ata_taskfile *tf = &qc->tf;
1145 struct ata_device *dev = qc->dev;
1149 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1151 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1152 scsicmd[0] == WRITE_16)
1153 tf->flags |= ATA_TFLAG_WRITE;
1155 /* Calculate the SCSI LBA, transfer length and FUA. */
1156 switch (scsicmd[0]) {
1159 scsi_10_lba_len(scsicmd, &block, &n_block);
1160 if (unlikely(scsicmd[1] & (1 << 3)))
1161 tf->flags |= ATA_TFLAG_FUA;
1165 scsi_6_lba_len(scsicmd, &block, &n_block);
1167 /* for 6-byte r/w commands, transfer length 0
1168 * means 256 blocks of data, not 0 block.
1175 scsi_16_lba_len(scsicmd, &block, &n_block);
1176 if (unlikely(scsicmd[1] & (1 << 3)))
1177 tf->flags |= ATA_TFLAG_FUA;
1180 DPRINTK("no-byte command\n");
1184 /* Check and compose ATA command */
1186 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1187 * length 0 means transfer 0 block of data.
1188 * However, for ATA R/W commands, sector count 0 means
1189 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1191 * WARNING: one or two older ATA drives treat 0 as 0...
1195 if (dev->flags & ATA_DFLAG_LBA) {
1196 tf->flags |= ATA_TFLAG_LBA;
1198 if (lba_28_ok(block, n_block)) {
1200 tf->device |= (block >> 24) & 0xf;
1201 } else if (lba_48_ok(block, n_block)) {
1202 if (!(dev->flags & ATA_DFLAG_LBA48))
1206 tf->flags |= ATA_TFLAG_LBA48;
1208 tf->hob_nsect = (n_block >> 8) & 0xff;
1210 tf->hob_lbah = (block >> 40) & 0xff;
1211 tf->hob_lbam = (block >> 32) & 0xff;
1212 tf->hob_lbal = (block >> 24) & 0xff;
1214 /* request too large even for LBA48 */
1217 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1220 qc->nsect = n_block;
1221 tf->nsect = n_block & 0xff;
1223 tf->lbah = (block >> 16) & 0xff;
1224 tf->lbam = (block >> 8) & 0xff;
1225 tf->lbal = block & 0xff;
1227 tf->device |= ATA_LBA;
1230 u32 sect, head, cyl, track;
1232 /* The request -may- be too large for CHS addressing. */
1233 if (!lba_28_ok(block, n_block))
1236 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1239 /* Convert LBA to CHS */
1240 track = (u32)block / dev->sectors;
1241 cyl = track / dev->heads;
1242 head = track % dev->heads;
1243 sect = (u32)block % dev->sectors + 1;
1245 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1246 (u32)block, track, cyl, head, sect);
1248 /* Check whether the converted CHS can fit.
1252 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1255 qc->nsect = n_block;
1256 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1259 tf->lbah = cyl >> 8;
1266 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1267 /* "Invalid field in cbd" */
1271 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1272 /* "Logical Block Address out of range" */
1276 qc->scsicmd->result = SAM_STAT_GOOD;
1280 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1282 struct scsi_cmnd *cmd = qc->scsicmd;
1283 u8 *cdb = cmd->cmnd;
1284 int need_sense = (qc->err_mask != 0);
1286 /* For ATA pass thru (SAT) commands, generate a sense block if
1287 * user mandated it or if there's an error. Note that if we
1288 * generate because the user forced us to, a check condition
1289 * is generated and the ATA register values are returned
1290 * whether the command completed successfully or not. If there
1291 * was no error, SK, ASC and ASCQ will all be zero.
1293 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1294 ((cdb[2] & 0x20) || need_sense)) {
1295 ata_gen_ata_desc_sense(qc);
1298 cmd->result = SAM_STAT_GOOD;
1300 /* TODO: decide which descriptor format to use
1301 * for 48b LBA devices and call that here
1302 * instead of the fixed desc, which is only
1303 * good for smaller LBA (and maybe CHS?)
1306 ata_gen_fixed_sense(qc);
1311 /* The ata_gen_..._sense routines fill in tf */
1312 ata_dump_status(qc->ap->id, &qc->tf);
1321 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1322 * @ap: ATA port to which the command is addressed
1323 * @dev: ATA device to which the command is addressed
1324 * @cmd: SCSI command to execute
1325 * @done: SCSI command completion function
1326 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1328 * Our ->queuecommand() function has decided that the SCSI
1329 * command issued can be directly translated into an ATA
1330 * command, rather than handled internally.
1332 * This function sets up an ata_queued_cmd structure for the
1333 * SCSI command, and sends that ata_queued_cmd to the hardware.
1335 * The xlat_func argument (actor) returns 0 if ready to execute
1336 * ATA command, else 1 to finish translation. If 1 is returned
1337 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1338 * to be set reflecting an error condition or clean (early)
1342 * spin_lock_irqsave(host_set lock)
1345 static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
1346 struct scsi_cmnd *cmd,
1347 void (*done)(struct scsi_cmnd *),
1348 ata_xlat_func_t xlat_func)
1350 struct ata_queued_cmd *qc;
1351 u8 *scsicmd = cmd->cmnd;
1355 qc = ata_scsi_qc_new(ap, dev, cmd, done);
1359 /* data is present; dma-map it */
1360 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1361 cmd->sc_data_direction == DMA_TO_DEVICE) {
1362 if (unlikely(cmd->request_bufflen < 1)) {
1363 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
1364 ap->id, dev->devno);
1369 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1371 ata_sg_init_one(qc, cmd->request_buffer,
1372 cmd->request_bufflen);
1374 qc->dma_dir = cmd->sc_data_direction;
1377 qc->complete_fn = ata_scsi_qc_complete;
1379 if (xlat_func(qc, scsicmd))
1382 /* select device, send command to hardware */
1383 qc->err_mask = ata_qc_issue(qc);
1385 ata_qc_complete(qc);
1393 DPRINTK("EXIT - early finish (good or error)\n");
1399 cmd->result = (DID_ERROR << 16);
1401 DPRINTK("EXIT - internal\n");
1406 * ata_scsi_rbuf_get - Map response buffer.
1407 * @cmd: SCSI command containing buffer to be mapped.
1408 * @buf_out: Pointer to mapped area.
1410 * Maps buffer contained within SCSI command @cmd.
1413 * spin_lock_irqsave(host_set lock)
1416 * Length of response buffer.
1419 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1422 unsigned int buflen;
1425 struct scatterlist *sg;
1427 sg = (struct scatterlist *) cmd->request_buffer;
1428 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1429 buflen = sg->length;
1431 buf = cmd->request_buffer;
1432 buflen = cmd->request_bufflen;
1440 * ata_scsi_rbuf_put - Unmap response buffer.
1441 * @cmd: SCSI command containing buffer to be unmapped.
1442 * @buf: buffer to unmap
1444 * Unmaps response buffer contained within @cmd.
1447 * spin_lock_irqsave(host_set lock)
1450 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1453 struct scatterlist *sg;
1455 sg = (struct scatterlist *) cmd->request_buffer;
1456 kunmap_atomic(buf - sg->offset, KM_USER0);
1461 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1462 * @args: device IDENTIFY data / SCSI command of interest.
1463 * @actor: Callback hook for desired SCSI command simulator
1465 * Takes care of the hard work of simulating a SCSI command...
1466 * Mapping the response buffer, calling the command's handler,
1467 * and handling the handler's return value. This return value
1468 * indicates whether the handler wishes the SCSI command to be
1469 * completed successfully (0), or not (in which case cmd->result
1470 * and sense buffer are assumed to be set).
1473 * spin_lock_irqsave(host_set lock)
1476 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1477 unsigned int (*actor) (struct ata_scsi_args *args,
1478 u8 *rbuf, unsigned int buflen))
1481 unsigned int buflen, rc;
1482 struct scsi_cmnd *cmd = args->cmd;
1484 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1485 memset(rbuf, 0, buflen);
1486 rc = actor(args, rbuf, buflen);
1487 ata_scsi_rbuf_put(cmd, rbuf);
1490 cmd->result = SAM_STAT_GOOD;
1495 * ata_scsiop_inq_std - Simulate INQUIRY command
1496 * @args: device IDENTIFY data / SCSI command of interest.
1497 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1498 * @buflen: Response buffer length.
1500 * Returns standard device identification data associated
1501 * with non-EVPD INQUIRY command output.
1504 * spin_lock_irqsave(host_set lock)
1507 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1508 unsigned int buflen)
1513 0x5, /* claim SPC-3 version compatibility */
1518 /* set scsi removeable (RMB) bit per ata bit */
1519 if (ata_id_removeable(args->id))
1524 memcpy(rbuf, hdr, sizeof(hdr));
1527 memcpy(&rbuf[8], "ATA ", 8);
1528 ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1529 ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1530 if (rbuf[32] == 0 || rbuf[32] == ' ')
1531 memcpy(&rbuf[32], "n/a ", 4);
1535 const u8 versions[] = {
1536 0x60, /* SAM-3 (no version claimed) */
1539 0x20, /* SBC-2 (no version claimed) */
1542 0x60 /* SPC-3 (no version claimed) */
1545 memcpy(rbuf + 59, versions, sizeof(versions));
1552 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1553 * @args: device IDENTIFY data / SCSI command of interest.
1554 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1555 * @buflen: Response buffer length.
1557 * Returns list of inquiry EVPD pages available.
1560 * spin_lock_irqsave(host_set lock)
1563 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1564 unsigned int buflen)
1566 const u8 pages[] = {
1567 0x00, /* page 0x00, this page */
1568 0x80, /* page 0x80, unit serial no page */
1569 0x83 /* page 0x83, device ident page */
1571 rbuf[3] = sizeof(pages); /* number of supported EVPD pages */
1574 memcpy(rbuf + 4, pages, sizeof(pages));
1580 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1581 * @args: device IDENTIFY data / SCSI command of interest.
1582 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1583 * @buflen: Response buffer length.
1585 * Returns ATA device serial number.
1588 * spin_lock_irqsave(host_set lock)
1591 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1592 unsigned int buflen)
1596 0x80, /* this page code */
1598 ATA_SERNO_LEN, /* page len */
1600 memcpy(rbuf, hdr, sizeof(hdr));
1602 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1603 ata_dev_id_string(args->id, (unsigned char *) &rbuf[4],
1604 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1609 static const char * const inq_83_str = "Linux ATA-SCSI simulator";
1612 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1613 * @args: device IDENTIFY data / SCSI command of interest.
1614 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1615 * @buflen: Response buffer length.
1617 * Returns device identification. Currently hardcoded to
1618 * return "Linux ATA-SCSI simulator".
1621 * spin_lock_irqsave(host_set lock)
1624 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1625 unsigned int buflen)
1627 rbuf[1] = 0x83; /* this page code */
1628 rbuf[3] = 4 + strlen(inq_83_str); /* page len */
1630 /* our one and only identification descriptor (vendor-specific) */
1631 if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) {
1632 rbuf[4 + 0] = 2; /* code set: ASCII */
1633 rbuf[4 + 3] = strlen(inq_83_str);
1634 memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str));
1641 * ata_scsiop_noop - Command handler that simply returns success.
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 * No operation. Simply returns success to caller, to indicate
1647 * that the caller should successfully complete this SCSI command.
1650 * spin_lock_irqsave(host_set lock)
1653 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1654 unsigned int buflen)
1661 * ata_msense_push - Push data onto MODE SENSE data output buffer
1662 * @ptr_io: (input/output) Location to store more output data
1663 * @last: End of output data buffer
1664 * @buf: Pointer to BLOB being added to output buffer
1665 * @buflen: Length of BLOB
1667 * Store MODE SENSE data on an output buffer.
1673 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1674 const u8 *buf, unsigned int buflen)
1678 if ((ptr + buflen - 1) > last)
1681 memcpy(ptr, buf, buflen);
1689 * ata_msense_caching - Simulate MODE SENSE caching info page
1690 * @id: device IDENTIFY data
1691 * @ptr_io: (input/output) Location to store more output data
1692 * @last: End of output data buffer
1694 * Generate a caching info page, which conditionally indicates
1695 * write caching to the SCSI layer, depending on device
1702 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1705 u8 page[CACHE_MPAGE_LEN];
1707 memcpy(page, def_cache_mpage, sizeof(page));
1708 if (ata_id_wcache_enabled(id))
1709 page[2] |= (1 << 2); /* write cache enable */
1710 if (!ata_id_rahead_enabled(id))
1711 page[12] |= (1 << 5); /* disable read ahead */
1713 ata_msense_push(ptr_io, last, page, sizeof(page));
1714 return sizeof(page);
1718 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1719 * @dev: Device associated with this MODE SENSE command
1720 * @ptr_io: (input/output) Location to store more output data
1721 * @last: End of output data buffer
1723 * Generate a generic MODE SENSE control mode page.
1729 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1731 ata_msense_push(ptr_io, last, def_control_mpage,
1732 sizeof(def_control_mpage));
1733 return sizeof(def_control_mpage);
1737 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1738 * @dev: Device associated with this MODE SENSE command
1739 * @ptr_io: (input/output) Location to store more output data
1740 * @last: End of output data buffer
1742 * Generate a generic MODE SENSE r/w error recovery page.
1748 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1751 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1752 sizeof(def_rw_recovery_mpage));
1753 return sizeof(def_rw_recovery_mpage);
1757 * We can turn this into a real blacklist if it's needed, for now just
1758 * blacklist any Maxtor BANC1G10 revision firmware
1760 static int ata_dev_supports_fua(u16 *id)
1762 unsigned char model[41], fw[9];
1764 if (!ata_id_has_fua(id))
1770 ata_dev_id_string(id, model, ATA_ID_PROD_OFS, sizeof(model) - 1);
1771 ata_dev_id_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw) - 1);
1773 if (strncmp(model, "Maxtor", 6))
1775 if (strncmp(fw, "BANC1G10", 8))
1778 return 0; /* blacklisted */
1782 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1783 * @args: device IDENTIFY data / SCSI command of interest.
1784 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1785 * @buflen: Response buffer length.
1787 * Simulate MODE SENSE commands. Assume this is invoked for direct
1788 * access devices (e.g. disks) only. There should be no block
1789 * descriptor for other device types.
1792 * spin_lock_irqsave(host_set lock)
1795 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1796 unsigned int buflen)
1798 struct ata_device *dev = args->dev;
1799 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1800 const u8 sat_blk_desc[] = {
1801 0, 0, 0, 0, /* number of blocks: sat unspecified */
1803 0, 0x2, 0x0 /* block length: 512 bytes */
1806 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1811 six_byte = (scsicmd[0] == MODE_SENSE);
1812 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1814 * LLBA bit in msense(10) ignored (compliant)
1817 page_control = scsicmd[2] >> 6;
1818 switch (page_control) {
1819 case 0: /* current */
1820 break; /* supported */
1822 goto saving_not_supp;
1823 case 1: /* changeable */
1824 case 2: /* defaults */
1830 output_len = 4 + (ebd ? 8 : 0);
1831 alloc_len = scsicmd[4];
1833 output_len = 8 + (ebd ? 8 : 0);
1834 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1836 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1838 p = rbuf + output_len;
1839 last = rbuf + minlen - 1;
1841 pg = scsicmd[2] & 0x3f;
1844 * No mode subpages supported (yet) but asking for _all_
1845 * subpages may be valid
1847 if (spg && (spg != ALL_SUB_MPAGES))
1851 case RW_RECOVERY_MPAGE:
1852 output_len += ata_msense_rw_recovery(&p, last);
1856 output_len += ata_msense_caching(args->id, &p, last);
1859 case CONTROL_MPAGE: {
1860 output_len += ata_msense_ctl_mode(&p, last);
1865 output_len += ata_msense_rw_recovery(&p, last);
1866 output_len += ata_msense_caching(args->id, &p, last);
1867 output_len += ata_msense_ctl_mode(&p, last);
1870 default: /* invalid page code */
1878 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
1879 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1884 rbuf[0] = output_len;
1889 rbuf[3] = sizeof(sat_blk_desc);
1891 memcpy(rbuf + 4, sat_blk_desc,
1892 sizeof(sat_blk_desc));
1896 rbuf[0] = output_len >> 8;
1898 rbuf[1] = output_len;
1903 rbuf[7] = sizeof(sat_blk_desc);
1905 memcpy(rbuf + 8, sat_blk_desc,
1906 sizeof(sat_blk_desc));
1912 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1913 /* "Invalid field in cbd" */
1917 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1918 /* "Saving parameters not supported" */
1923 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1924 * @args: device IDENTIFY data / SCSI command of interest.
1925 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1926 * @buflen: Response buffer length.
1928 * Simulate READ CAPACITY commands.
1931 * spin_lock_irqsave(host_set lock)
1934 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1935 unsigned int buflen)
1942 if (ata_id_has_lba(args->id)) {
1943 if (ata_id_has_lba48(args->id))
1944 n_sectors = ata_id_u64(args->id, 100);
1946 n_sectors = ata_id_u32(args->id, 60);
1948 /* CHS default translation */
1949 n_sectors = args->id[1] * args->id[3] * args->id[6];
1951 if (ata_id_current_chs_valid(args->id))
1952 /* CHS current translation */
1953 n_sectors = ata_id_u32(args->id, 57);
1956 n_sectors--; /* ATA TotalUserSectors - 1 */
1958 if (args->cmd->cmnd[0] == READ_CAPACITY) {
1959 if( n_sectors >= 0xffffffffULL )
1960 tmp = 0xffffffff ; /* Return max count on overflow */
1964 /* sector count, 32-bit */
1965 rbuf[0] = tmp >> (8 * 3);
1966 rbuf[1] = tmp >> (8 * 2);
1967 rbuf[2] = tmp >> (8 * 1);
1971 tmp = ATA_SECT_SIZE;
1976 /* sector count, 64-bit */
1977 tmp = n_sectors >> (8 * 4);
1978 rbuf[2] = tmp >> (8 * 3);
1979 rbuf[3] = tmp >> (8 * 2);
1980 rbuf[4] = tmp >> (8 * 1);
1983 rbuf[6] = tmp >> (8 * 3);
1984 rbuf[7] = tmp >> (8 * 2);
1985 rbuf[8] = tmp >> (8 * 1);
1989 tmp = ATA_SECT_SIZE;
1990 rbuf[12] = tmp >> 8;
1998 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1999 * @args: device IDENTIFY data / SCSI command of interest.
2000 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2001 * @buflen: Response buffer length.
2003 * Simulate REPORT LUNS command.
2006 * spin_lock_irqsave(host_set lock)
2009 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2010 unsigned int buflen)
2013 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2019 * ata_scsi_set_sense - Set SCSI sense data and status
2020 * @cmd: SCSI request to be handled
2021 * @sk: SCSI-defined sense key
2022 * @asc: SCSI-defined additional sense code
2023 * @ascq: SCSI-defined additional sense code qualifier
2025 * Helper function that builds a valid fixed format, current
2026 * response code and the given sense key (sk), additional sense
2027 * code (asc) and additional sense code qualifier (ascq) with
2028 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2029 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2035 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2037 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2039 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2040 cmd->sense_buffer[2] = sk;
2041 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2042 cmd->sense_buffer[12] = asc;
2043 cmd->sense_buffer[13] = ascq;
2047 * ata_scsi_badcmd - End a SCSI request with an error
2048 * @cmd: SCSI request to be handled
2049 * @done: SCSI command completion function
2050 * @asc: SCSI-defined additional sense code
2051 * @ascq: SCSI-defined additional sense code qualifier
2053 * Helper function that completes a SCSI command with
2054 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2055 * and the specified additional sense codes.
2058 * spin_lock_irqsave(host_set lock)
2061 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2064 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2069 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2071 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
2072 /* FIXME: not quite right; we don't want the
2073 * translation of taskfile registers into
2074 * a sense descriptors, since that's only
2075 * correct for ATA, not ATAPI
2077 ata_gen_ata_desc_sense(qc);
2079 qc->scsidone(qc->scsicmd);
2083 /* is it pointless to prefer PIO for "safety reasons"? */
2084 static inline int ata_pio_use_silly(struct ata_port *ap)
2086 return (ap->flags & ATA_FLAG_PIO_DMA);
2089 static void atapi_request_sense(struct ata_queued_cmd *qc)
2091 struct ata_port *ap = qc->ap;
2092 struct scsi_cmnd *cmd = qc->scsicmd;
2094 DPRINTK("ATAPI request sense\n");
2096 /* FIXME: is this needed? */
2097 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2099 ap->ops->tf_read(ap, &qc->tf);
2101 /* fill these in, for the case where they are -not- overwritten */
2102 cmd->sense_buffer[0] = 0x70;
2103 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2107 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2108 qc->dma_dir = DMA_FROM_DEVICE;
2110 memset(&qc->cdb, 0, ap->cdb_len);
2111 qc->cdb[0] = REQUEST_SENSE;
2112 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2114 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2115 qc->tf.command = ATA_CMD_PACKET;
2117 if (ata_pio_use_silly(ap)) {
2118 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2119 qc->tf.feature |= ATAPI_PKT_DMA;
2121 qc->tf.protocol = ATA_PROT_ATAPI;
2122 qc->tf.lbam = (8 * 1024) & 0xff;
2123 qc->tf.lbah = (8 * 1024) >> 8;
2125 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2127 qc->complete_fn = atapi_sense_complete;
2129 qc->err_mask = ata_qc_issue(qc);
2131 ata_qc_complete(qc);
2136 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2138 struct scsi_cmnd *cmd = qc->scsicmd;
2139 unsigned int err_mask = qc->err_mask;
2141 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2143 if (unlikely(err_mask & AC_ERR_DEV)) {
2144 cmd->result = SAM_STAT_CHECK_CONDITION;
2145 atapi_request_sense(qc);
2149 else if (unlikely(err_mask))
2150 /* FIXME: not quite right; we don't want the
2151 * translation of taskfile registers into
2152 * a sense descriptors, since that's only
2153 * correct for ATA, not ATAPI
2155 ata_gen_ata_desc_sense(qc);
2158 u8 *scsicmd = cmd->cmnd;
2160 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2162 unsigned int buflen;
2164 buflen = ata_scsi_rbuf_get(cmd, &buf);
2166 /* ATAPI devices typically report zero for their SCSI version,
2167 * and sometimes deviate from the spec WRT response data
2168 * format. If SCSI version is reported as zero like normal,
2169 * then we make the following fixups: 1) Fake MMC-5 version,
2170 * to indicate to the Linux scsi midlayer this is a modern
2171 * device. 2) Ensure response data format / ATAPI information
2172 * are always correct.
2179 ata_scsi_rbuf_put(cmd, buf);
2182 cmd->result = SAM_STAT_GOOD;
2189 * atapi_xlat - Initialize PACKET taskfile
2190 * @qc: command structure to be initialized
2191 * @scsicmd: SCSI CDB associated with this PACKET command
2194 * spin_lock_irqsave(host_set lock)
2197 * Zero on success, non-zero on failure.
2200 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2202 struct scsi_cmnd *cmd = qc->scsicmd;
2203 struct ata_device *dev = qc->dev;
2204 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2205 int nodata = (cmd->sc_data_direction == DMA_NONE);
2208 /* Check whether ATAPI DMA is safe */
2209 if (ata_check_atapi_dma(qc))
2212 memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len);
2214 qc->complete_fn = atapi_qc_complete;
2216 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2217 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2218 qc->tf.flags |= ATA_TFLAG_WRITE;
2219 DPRINTK("direction: write\n");
2222 qc->tf.command = ATA_CMD_PACKET;
2224 /* no data, or PIO data xfer */
2225 if (using_pio || nodata) {
2227 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2229 qc->tf.protocol = ATA_PROT_ATAPI;
2230 qc->tf.lbam = (8 * 1024) & 0xff;
2231 qc->tf.lbah = (8 * 1024) >> 8;
2236 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2237 qc->tf.feature |= ATAPI_PKT_DMA;
2239 #ifdef ATAPI_ENABLE_DMADIR
2240 /* some SATA bridges need us to indicate data xfer direction */
2241 if (cmd->sc_data_direction != DMA_TO_DEVICE)
2242 qc->tf.feature |= ATAPI_DMADIR;
2246 qc->nbytes = cmd->bufflen;
2252 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2253 * @ap: ATA port to which the device is attached
2254 * @scsidev: SCSI device from which we derive the ATA device
2256 * Given various information provided in struct scsi_cmnd,
2257 * map that onto an ATA bus, and using that mapping
2258 * determine which ata_device is associated with the
2259 * SCSI command to be sent.
2262 * spin_lock_irqsave(host_set lock)
2265 * Associated ATA device, or %NULL if not found.
2268 static struct ata_device *
2269 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2271 struct ata_device *dev;
2273 /* skip commands not addressed to targets we simulate */
2274 if (likely(scsidev->id < ATA_MAX_DEVICES))
2275 dev = &ap->device[scsidev->id];
2279 if (unlikely((scsidev->channel != 0) ||
2280 (scsidev->lun != 0)))
2283 if (unlikely(!ata_dev_present(dev)))
2286 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2287 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2288 printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2289 ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
2298 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2299 * @byte1: Byte 1 from pass-thru CDB.
2302 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2305 ata_scsi_map_proto(u8 byte1)
2307 switch((byte1 & 0x1e) >> 1) {
2308 case 3: /* Non-data */
2309 return ATA_PROT_NODATA;
2312 return ATA_PROT_DMA;
2314 case 4: /* PIO Data-in */
2315 case 5: /* PIO Data-out */
2317 return ATA_PROT_PIO_MULT;
2319 return ATA_PROT_PIO;
2321 case 10: /* Device Reset */
2322 case 0: /* Hard Reset */
2324 case 2: /* Bus Idle */
2325 case 7: /* Packet */
2326 case 8: /* DMA Queued */
2327 case 9: /* Device Diagnostic */
2328 case 11: /* UDMA Data-in */
2329 case 12: /* UDMA Data-Out */
2330 case 13: /* FPDMA */
2331 default: /* Reserved */
2335 return ATA_PROT_UNKNOWN;
2339 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2340 * @qc: command structure to be initialized
2341 * @scsicmd: SCSI command to convert
2343 * Handles either 12 or 16-byte versions of the CDB.
2346 * Zero on success, non-zero on failure.
2349 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2351 struct ata_taskfile *tf = &(qc->tf);
2352 struct scsi_cmnd *cmd = qc->scsicmd;
2354 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2358 * 12 and 16 byte CDBs use different offsets to
2359 * provide the various register values.
2361 if (scsicmd[0] == ATA_16) {
2363 * 16-byte CDB - may contain extended commands.
2365 * If that is the case, copy the upper byte register values.
2367 if (scsicmd[1] & 0x01) {
2368 tf->hob_feature = scsicmd[3];
2369 tf->hob_nsect = scsicmd[5];
2370 tf->hob_lbal = scsicmd[7];
2371 tf->hob_lbam = scsicmd[9];
2372 tf->hob_lbah = scsicmd[11];
2373 tf->flags |= ATA_TFLAG_LBA48;
2375 tf->flags &= ~ATA_TFLAG_LBA48;
2378 * Always copy low byte, device and command registers.
2380 tf->feature = scsicmd[4];
2381 tf->nsect = scsicmd[6];
2382 tf->lbal = scsicmd[8];
2383 tf->lbam = scsicmd[10];
2384 tf->lbah = scsicmd[12];
2385 tf->device = scsicmd[13];
2386 tf->command = scsicmd[14];
2389 * 12-byte CDB - incapable of extended commands.
2391 tf->flags &= ~ATA_TFLAG_LBA48;
2393 tf->feature = scsicmd[3];
2394 tf->nsect = scsicmd[4];
2395 tf->lbal = scsicmd[5];
2396 tf->lbam = scsicmd[6];
2397 tf->lbah = scsicmd[7];
2398 tf->device = scsicmd[8];
2399 tf->command = scsicmd[9];
2402 * If slave is possible, enforce correct master/slave bit
2404 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2405 tf->device = qc->dev->devno ?
2406 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2409 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2410 * SET_FEATURES - XFER MODE must be preceded/succeeded
2411 * by an update to hardware-specific registers for each
2412 * controller (i.e. the reason for ->set_piomode(),
2413 * ->set_dmamode(), and ->post_set_mode() hooks).
2415 if ((tf->command == ATA_CMD_SET_FEATURES)
2416 && (tf->feature == SETFEATURES_XFER))
2420 * Set flags so that all registers will be written,
2421 * and pass on write indication (used for PIO/DMA
2424 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2426 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2427 tf->flags |= ATA_TFLAG_WRITE;
2430 * Set transfer length.
2432 * TODO: find out if we need to do more here to
2433 * cover scatter/gather case.
2435 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2440 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2441 /* "Invalid field in cdb" */
2446 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2448 * @cmd: SCSI command opcode to consider
2450 * Look up the SCSI command given, and determine whether the
2451 * SCSI command is to be translated or simulated.
2454 * Pointer to translation function if possible, %NULL if not.
2457 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2467 return ata_scsi_rw_xlat;
2469 case SYNCHRONIZE_CACHE:
2470 if (ata_try_flush_cache(dev))
2471 return ata_scsi_flush_xlat;
2476 return ata_scsi_verify_xlat;
2480 return ata_scsi_pass_thru;
2483 return ata_scsi_start_stop_xlat;
2490 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2491 * @ap: ATA port to which the command was being sent
2492 * @cmd: SCSI command to dump
2494 * Prints the contents of a SCSI command via printk().
2497 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2498 struct scsi_cmnd *cmd)
2501 struct scsi_device *scsidev = cmd->device;
2502 u8 *scsicmd = cmd->cmnd;
2504 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2506 scsidev->channel, scsidev->id, scsidev->lun,
2507 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2508 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2514 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2515 * @cmd: SCSI command to be sent
2516 * @done: Completion function, called when command is complete
2518 * In some cases, this function translates SCSI commands into
2519 * ATA taskfiles, and queues the taskfiles to be sent to
2520 * hardware. In other cases, this function simulates a
2521 * SCSI device by evaluating and responding to certain
2522 * SCSI commands. This creates the overall effect of
2523 * ATA and ATAPI devices appearing as SCSI devices.
2526 * Releases scsi-layer-held lock, and obtains host_set lock.
2532 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2534 struct ata_port *ap;
2535 struct ata_device *dev;
2536 struct scsi_device *scsidev = cmd->device;
2537 struct Scsi_Host *shost = scsidev->host;
2539 ap = (struct ata_port *) &shost->hostdata[0];
2541 spin_unlock(shost->host_lock);
2542 spin_lock(&ap->host_set->lock);
2544 ata_scsi_dump_cdb(ap, cmd);
2546 dev = ata_scsi_find_dev(ap, scsidev);
2547 if (unlikely(!dev)) {
2548 cmd->result = (DID_BAD_TARGET << 16);
2553 if (dev->class == ATA_DEV_ATA) {
2554 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2558 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
2560 ata_scsi_simulate(ap, dev, cmd, done);
2562 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
2565 spin_unlock(&ap->host_set->lock);
2566 spin_lock(shost->host_lock);
2571 * ata_scsi_simulate - simulate SCSI command on ATA device
2572 * @ap: port the device is connected to
2573 * @dev: the target device
2574 * @cmd: SCSI command being sent to device.
2575 * @done: SCSI command completion function.
2577 * Interprets and directly executes a select list of SCSI commands
2578 * that can be handled internally.
2581 * spin_lock_irqsave(host_set lock)
2584 void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
2585 struct scsi_cmnd *cmd,
2586 void (*done)(struct scsi_cmnd *))
2588 struct ata_scsi_args args;
2589 const u8 *scsicmd = cmd->cmnd;
2597 switch(scsicmd[0]) {
2598 /* no-op's, complete with success */
2599 case SYNCHRONIZE_CACHE:
2603 case TEST_UNIT_READY:
2604 case FORMAT_UNIT: /* FIXME: correct? */
2605 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2606 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2610 if (scsicmd[1] & 2) /* is CmdDt set? */
2611 ata_scsi_invalid_field(cmd, done);
2612 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2613 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2614 else if (scsicmd[2] == 0x00)
2615 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2616 else if (scsicmd[2] == 0x80)
2617 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2618 else if (scsicmd[2] == 0x83)
2619 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2621 ata_scsi_invalid_field(cmd, done);
2626 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2629 case MODE_SELECT: /* unconditionally return */
2630 case MODE_SELECT_10: /* bad-field-in-cdb */
2631 ata_scsi_invalid_field(cmd, done);
2635 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2638 case SERVICE_ACTION_IN:
2639 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2640 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2642 ata_scsi_invalid_field(cmd, done);
2646 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2649 /* mandatory commands we haven't implemented yet */
2652 /* all other commands */
2654 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2655 /* "Invalid command operation code" */
2661 void ata_scsi_scan_host(struct ata_port *ap)
2663 struct ata_device *dev;
2666 if (ap->flags & ATA_FLAG_PORT_DISABLED)
2669 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2670 dev = &ap->device[i];
2672 if (ata_dev_present(dev))
2673 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);