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 /* We need a sensible error return here, which is tricky, and one
515 that won't cause people to do things like return a disk wrongly */
516 *sk = ABORTED_COMMAND;
521 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
522 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
528 * ata_gen_ata_desc_sense - Generate check condition sense block.
529 * @qc: Command that completed.
531 * This function is specific to the ATA descriptor format sense
532 * block specified for the ATA pass through commands. Regardless
533 * of whether the command errored or not, return a sense
534 * block. Copy all controller registers into the sense
535 * block. Clear sense key, ASC & ASCQ if there is no error.
538 * spin_lock_irqsave(host_set lock)
540 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
542 struct scsi_cmnd *cmd = qc->scsicmd;
543 struct ata_taskfile *tf = &qc->tf;
544 unsigned char *sb = cmd->sense_buffer;
545 unsigned char *desc = sb + 8;
547 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
549 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
552 * Read the controller registers.
554 WARN_ON(qc->ap->ops->tf_read == NULL);
555 qc->ap->ops->tf_read(qc->ap, tf);
558 * Use ata_to_sense_error() to map status register bits
559 * onto sense key, asc & ascq.
561 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
562 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
563 &sb[1], &sb[2], &sb[3]);
568 * Sense data is current and format is descriptor.
575 * Set length of additional sense data.
576 * Since we only populate descriptor 0, the total
577 * length is the same (fixed) length as descriptor 0.
579 desc[1] = sb[7] = 14;
582 * Copy registers into sense buffer.
585 desc[3] = tf->feature; /* == error reg */
590 desc[12] = tf->device;
591 desc[13] = tf->command; /* == status reg */
594 * Fill in Extend bit, and the high order bytes
597 if (tf->flags & ATA_TFLAG_LBA48) {
599 desc[4] = tf->hob_nsect;
600 desc[6] = tf->hob_lbal;
601 desc[8] = tf->hob_lbam;
602 desc[10] = tf->hob_lbah;
607 * ata_gen_fixed_sense - generate a SCSI fixed sense block
608 * @qc: Command that we are erroring out
610 * Leverage ata_to_sense_error() to give us the codes. Fit our
611 * LBA in here if there's room.
614 * inherited from caller
616 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
618 struct scsi_cmnd *cmd = qc->scsicmd;
619 struct ata_taskfile *tf = &qc->tf;
620 unsigned char *sb = cmd->sense_buffer;
622 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
624 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
627 * Read the controller registers.
629 WARN_ON(qc->ap->ops->tf_read == NULL);
630 qc->ap->ops->tf_read(qc->ap, tf);
633 * Use ata_to_sense_error() to map status register bits
634 * onto sense key, asc & ascq.
636 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
637 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
638 &sb[2], &sb[12], &sb[13]);
645 if (tf->flags & ATA_TFLAG_LBA48) {
646 /* TODO: find solution for LBA48 descriptors */
649 else if (tf->flags & ATA_TFLAG_LBA) {
650 /* A small (28b) LBA will fit in the 32b info field */
651 sb[0] |= 0x80; /* set valid bit */
652 sb[3] = tf->device & 0x0f;
663 static void ata_scsi_sdev_config(struct scsi_device *sdev)
665 sdev->use_10_for_rw = 1;
666 sdev->use_10_for_ms = 1;
669 static void ata_scsi_dev_config(struct scsi_device *sdev,
670 struct ata_device *dev)
672 unsigned int max_sectors;
674 /* TODO: 2048 is an arbitrary number, not the
675 * hardware maximum. This should be increased to
676 * 65534 when Jens Axboe's patch for dynamically
677 * determining max_sectors is merged.
679 max_sectors = ATA_MAX_SECTORS;
680 if (dev->flags & ATA_DFLAG_LBA48)
682 if (dev->max_sectors)
683 max_sectors = dev->max_sectors;
685 blk_queue_max_sectors(sdev->request_queue, max_sectors);
688 * SATA DMA transfers must be multiples of 4 byte, so
689 * we need to pad ATAPI transfers using an extra sg.
690 * Decrement max hw segments accordingly.
692 if (dev->class == ATA_DEV_ATAPI) {
693 request_queue_t *q = sdev->request_queue;
694 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
699 * ata_scsi_slave_config - Set SCSI device attributes
700 * @sdev: SCSI device to examine
702 * This is called before we actually start reading
703 * and writing to the device, to configure certain
704 * SCSI mid-layer behaviors.
707 * Defined by SCSI layer. We don't really care.
710 int ata_scsi_slave_config(struct scsi_device *sdev)
712 ata_scsi_sdev_config(sdev);
714 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
716 if (sdev->id < ATA_MAX_DEVICES) {
718 struct ata_device *dev;
720 ap = (struct ata_port *) &sdev->host->hostdata[0];
721 dev = &ap->device[sdev->id];
723 ata_scsi_dev_config(sdev, dev);
726 return 0; /* scsi layer doesn't check return value, sigh */
730 * ata_scsi_timed_out - SCSI layer time out callback
731 * @cmd: timed out SCSI command
733 * Handles SCSI layer timeout. We race with normal completion of
734 * the qc for @cmd. If the qc is already gone, we lose and let
735 * the scsi command finish (EH_HANDLED). Otherwise, the qc has
736 * timed out and EH should be invoked. Prevent ata_qc_complete()
737 * from finishing it by setting EH_SCHEDULED and return
741 * Called from timer context
744 * EH_HANDLED or EH_NOT_HANDLED
746 enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
748 struct Scsi_Host *host = cmd->device->host;
749 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
751 struct ata_queued_cmd *qc;
752 enum scsi_eh_timer_return ret = EH_HANDLED;
756 spin_lock_irqsave(&ap->host_set->lock, flags);
757 qc = ata_qc_from_tag(ap, ap->active_tag);
759 WARN_ON(qc->scsicmd != cmd);
760 qc->flags |= ATA_QCFLAG_EH_SCHEDULED;
761 qc->err_mask |= AC_ERR_TIMEOUT;
762 ret = EH_NOT_HANDLED;
764 spin_unlock_irqrestore(&ap->host_set->lock, flags);
766 DPRINTK("EXIT, ret=%d\n", ret);
771 * ata_scsi_error - SCSI layer error handler callback
772 * @host: SCSI host on which error occurred
774 * Handles SCSI-layer-thrown error events.
777 * Inherited from SCSI layer (none, can sleep)
783 int ata_scsi_error(struct Scsi_Host *host)
790 ap = (struct ata_port *) &host->hostdata[0];
792 spin_lock_irqsave(&ap->host_set->lock, flags);
793 WARN_ON(ap->flags & ATA_FLAG_IN_EH);
794 ap->flags |= ATA_FLAG_IN_EH;
795 WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
796 spin_unlock_irqrestore(&ap->host_set->lock, flags);
798 ata_port_flush_task(ap);
800 ap->ops->eng_timeout(ap);
802 WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q));
804 scsi_eh_flush_done_q(&ap->eh_done_q);
806 spin_lock_irqsave(&ap->host_set->lock, flags);
807 ap->flags &= ~ATA_FLAG_IN_EH;
808 spin_unlock_irqrestore(&ap->host_set->lock, flags);
814 static void ata_eh_scsidone(struct scsi_cmnd *scmd)
819 static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
821 struct ata_port *ap = qc->ap;
822 struct scsi_cmnd *scmd = qc->scsicmd;
825 spin_lock_irqsave(&ap->host_set->lock, flags);
826 qc->scsidone = ata_eh_scsidone;
827 __ata_qc_complete(qc);
828 WARN_ON(ata_tag_valid(qc->tag));
829 spin_unlock_irqrestore(&ap->host_set->lock, flags);
831 scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
835 * ata_eh_qc_complete - Complete an active ATA command from EH
836 * @qc: Command to complete
838 * Indicate to the mid and upper layers that an ATA command has
839 * completed. To be used from EH.
841 void ata_eh_qc_complete(struct ata_queued_cmd *qc)
843 struct scsi_cmnd *scmd = qc->scsicmd;
844 scmd->retries = scmd->allowed;
845 __ata_eh_qc_complete(qc);
849 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
850 * @qc: Command to retry
852 * Indicate to the mid and upper layers that an ATA command
853 * should be retried. To be used from EH.
855 * SCSI midlayer limits the number of retries to scmd->allowed.
856 * This function might need to adjust scmd->retries for commands
857 * which get retried due to unrelated NCQ failures.
859 void ata_eh_qc_retry(struct ata_queued_cmd *qc)
861 __ata_eh_qc_complete(qc);
865 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
866 * @qc: Storage for translated ATA taskfile
867 * @scsicmd: SCSI command to translate
869 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
870 * (to start). Perhaps these commands should be preceded by
871 * CHECK POWER MODE to see what power mode the device is already in.
872 * [See SAT revision 5 at www.t10.org]
875 * spin_lock_irqsave(host_set lock)
878 * Zero on success, non-zero on error.
881 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
884 struct ata_taskfile *tf = &qc->tf;
886 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
887 tf->protocol = ATA_PROT_NODATA;
888 if (scsicmd[1] & 0x1) {
889 ; /* ignore IMMED bit, violates sat-r05 */
891 if (scsicmd[4] & 0x2)
892 goto invalid_fld; /* LOEJ bit set not supported */
893 if (((scsicmd[4] >> 4) & 0xf) != 0)
894 goto invalid_fld; /* power conditions not supported */
895 if (scsicmd[4] & 0x1) {
896 tf->nsect = 1; /* 1 sector, lba=0 */
898 if (qc->dev->flags & ATA_DFLAG_LBA) {
899 qc->tf.flags |= ATA_TFLAG_LBA;
904 tf->device |= ATA_LBA;
907 tf->lbal = 0x1; /* sect */
908 tf->lbam = 0x0; /* cyl low */
909 tf->lbah = 0x0; /* cyl high */
912 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
914 tf->nsect = 0; /* time period value (0 implies now) */
915 tf->command = ATA_CMD_STANDBY;
916 /* Consider: ATA STANDBY IMMEDIATE command */
919 * Standby and Idle condition timers could be implemented but that
920 * would require libata to implement the Power condition mode page
921 * and allow the user to change it. Changing mode pages requires
922 * MODE SELECT to be implemented.
928 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
929 /* "Invalid field in cbd" */
935 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
936 * @qc: Storage for translated ATA taskfile
937 * @scsicmd: SCSI command to translate (ignored)
939 * Sets up an ATA taskfile to issue FLUSH CACHE or
943 * spin_lock_irqsave(host_set lock)
946 * Zero on success, non-zero on error.
949 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
951 struct ata_taskfile *tf = &qc->tf;
953 tf->flags |= ATA_TFLAG_DEVICE;
954 tf->protocol = ATA_PROT_NODATA;
956 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
957 (ata_id_has_flush_ext(qc->dev->id)))
958 tf->command = ATA_CMD_FLUSH_EXT;
960 tf->command = ATA_CMD_FLUSH;
966 * scsi_6_lba_len - Get LBA and transfer length
967 * @scsicmd: SCSI command to translate
969 * Calculate LBA and transfer length for 6-byte commands.
973 * @plen: the transfer length
976 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
981 VPRINTK("six-byte command\n");
983 lba |= ((u64)scsicmd[2]) << 8;
984 lba |= ((u64)scsicmd[3]);
986 len |= ((u32)scsicmd[4]);
993 * scsi_10_lba_len - Get LBA and transfer length
994 * @scsicmd: SCSI command to translate
996 * Calculate LBA and transfer length for 10-byte commands.
1000 * @plen: the transfer length
1003 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1008 VPRINTK("ten-byte command\n");
1010 lba |= ((u64)scsicmd[2]) << 24;
1011 lba |= ((u64)scsicmd[3]) << 16;
1012 lba |= ((u64)scsicmd[4]) << 8;
1013 lba |= ((u64)scsicmd[5]);
1015 len |= ((u32)scsicmd[7]) << 8;
1016 len |= ((u32)scsicmd[8]);
1023 * scsi_16_lba_len - Get LBA and transfer length
1024 * @scsicmd: SCSI command to translate
1026 * Calculate LBA and transfer length for 16-byte commands.
1030 * @plen: the transfer length
1033 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1038 VPRINTK("sixteen-byte command\n");
1040 lba |= ((u64)scsicmd[2]) << 56;
1041 lba |= ((u64)scsicmd[3]) << 48;
1042 lba |= ((u64)scsicmd[4]) << 40;
1043 lba |= ((u64)scsicmd[5]) << 32;
1044 lba |= ((u64)scsicmd[6]) << 24;
1045 lba |= ((u64)scsicmd[7]) << 16;
1046 lba |= ((u64)scsicmd[8]) << 8;
1047 lba |= ((u64)scsicmd[9]);
1049 len |= ((u32)scsicmd[10]) << 24;
1050 len |= ((u32)scsicmd[11]) << 16;
1051 len |= ((u32)scsicmd[12]) << 8;
1052 len |= ((u32)scsicmd[13]);
1059 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1060 * @qc: Storage for translated ATA taskfile
1061 * @scsicmd: SCSI command to translate
1063 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1066 * spin_lock_irqsave(host_set lock)
1069 * Zero on success, non-zero on error.
1072 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1074 struct ata_taskfile *tf = &qc->tf;
1075 struct ata_device *dev = qc->dev;
1076 u64 dev_sectors = qc->dev->n_sectors;
1080 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1081 tf->protocol = ATA_PROT_NODATA;
1083 if (scsicmd[0] == VERIFY)
1084 scsi_10_lba_len(scsicmd, &block, &n_block);
1085 else if (scsicmd[0] == VERIFY_16)
1086 scsi_16_lba_len(scsicmd, &block, &n_block);
1092 if (block >= dev_sectors)
1094 if ((block + n_block) > dev_sectors)
1097 if (dev->flags & ATA_DFLAG_LBA) {
1098 tf->flags |= ATA_TFLAG_LBA;
1100 if (lba_28_ok(block, n_block)) {
1102 tf->command = ATA_CMD_VERIFY;
1103 tf->device |= (block >> 24) & 0xf;
1104 } else if (lba_48_ok(block, n_block)) {
1105 if (!(dev->flags & ATA_DFLAG_LBA48))
1109 tf->flags |= ATA_TFLAG_LBA48;
1110 tf->command = ATA_CMD_VERIFY_EXT;
1112 tf->hob_nsect = (n_block >> 8) & 0xff;
1114 tf->hob_lbah = (block >> 40) & 0xff;
1115 tf->hob_lbam = (block >> 32) & 0xff;
1116 tf->hob_lbal = (block >> 24) & 0xff;
1118 /* request too large even for LBA48 */
1121 tf->nsect = n_block & 0xff;
1123 tf->lbah = (block >> 16) & 0xff;
1124 tf->lbam = (block >> 8) & 0xff;
1125 tf->lbal = block & 0xff;
1127 tf->device |= ATA_LBA;
1130 u32 sect, head, cyl, track;
1132 if (!lba_28_ok(block, n_block))
1135 /* Convert LBA to CHS */
1136 track = (u32)block / dev->sectors;
1137 cyl = track / dev->heads;
1138 head = track % dev->heads;
1139 sect = (u32)block % dev->sectors + 1;
1141 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1142 (u32)block, track, cyl, head, sect);
1144 /* Check whether the converted CHS can fit.
1148 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1151 tf->command = ATA_CMD_VERIFY;
1152 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1155 tf->lbah = cyl >> 8;
1162 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1163 /* "Invalid field in cbd" */
1167 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1168 /* "Logical Block Address out of range" */
1172 qc->scsicmd->result = SAM_STAT_GOOD;
1177 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1178 * @qc: Storage for translated ATA taskfile
1179 * @scsicmd: SCSI command to translate
1181 * Converts any of six SCSI read/write commands into the
1182 * ATA counterpart, including starting sector (LBA),
1183 * sector count, and taking into account the device's LBA48
1186 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1187 * %WRITE_16 are currently supported.
1190 * spin_lock_irqsave(host_set lock)
1193 * Zero on success, non-zero on error.
1196 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1198 struct ata_taskfile *tf = &qc->tf;
1199 struct ata_device *dev = qc->dev;
1203 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1205 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1206 scsicmd[0] == WRITE_16)
1207 tf->flags |= ATA_TFLAG_WRITE;
1209 /* Calculate the SCSI LBA, transfer length and FUA. */
1210 switch (scsicmd[0]) {
1213 scsi_10_lba_len(scsicmd, &block, &n_block);
1214 if (unlikely(scsicmd[1] & (1 << 3)))
1215 tf->flags |= ATA_TFLAG_FUA;
1219 scsi_6_lba_len(scsicmd, &block, &n_block);
1221 /* for 6-byte r/w commands, transfer length 0
1222 * means 256 blocks of data, not 0 block.
1229 scsi_16_lba_len(scsicmd, &block, &n_block);
1230 if (unlikely(scsicmd[1] & (1 << 3)))
1231 tf->flags |= ATA_TFLAG_FUA;
1234 DPRINTK("no-byte command\n");
1238 /* Check and compose ATA command */
1240 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1241 * length 0 means transfer 0 block of data.
1242 * However, for ATA R/W commands, sector count 0 means
1243 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1245 * WARNING: one or two older ATA drives treat 0 as 0...
1249 if (dev->flags & ATA_DFLAG_LBA) {
1250 tf->flags |= ATA_TFLAG_LBA;
1252 if (lba_28_ok(block, n_block)) {
1254 tf->device |= (block >> 24) & 0xf;
1255 } else if (lba_48_ok(block, n_block)) {
1256 if (!(dev->flags & ATA_DFLAG_LBA48))
1260 tf->flags |= ATA_TFLAG_LBA48;
1262 tf->hob_nsect = (n_block >> 8) & 0xff;
1264 tf->hob_lbah = (block >> 40) & 0xff;
1265 tf->hob_lbam = (block >> 32) & 0xff;
1266 tf->hob_lbal = (block >> 24) & 0xff;
1268 /* request too large even for LBA48 */
1271 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1274 qc->nsect = n_block;
1275 tf->nsect = n_block & 0xff;
1277 tf->lbah = (block >> 16) & 0xff;
1278 tf->lbam = (block >> 8) & 0xff;
1279 tf->lbal = block & 0xff;
1281 tf->device |= ATA_LBA;
1284 u32 sect, head, cyl, track;
1286 /* The request -may- be too large for CHS addressing. */
1287 if (!lba_28_ok(block, n_block))
1290 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1293 /* Convert LBA to CHS */
1294 track = (u32)block / dev->sectors;
1295 cyl = track / dev->heads;
1296 head = track % dev->heads;
1297 sect = (u32)block % dev->sectors + 1;
1299 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1300 (u32)block, track, cyl, head, sect);
1302 /* Check whether the converted CHS can fit.
1306 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1309 qc->nsect = n_block;
1310 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1313 tf->lbah = cyl >> 8;
1320 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1321 /* "Invalid field in cbd" */
1325 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1326 /* "Logical Block Address out of range" */
1330 qc->scsicmd->result = SAM_STAT_GOOD;
1334 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1336 struct scsi_cmnd *cmd = qc->scsicmd;
1337 u8 *cdb = cmd->cmnd;
1338 int need_sense = (qc->err_mask != 0);
1340 /* For ATA pass thru (SAT) commands, generate a sense block if
1341 * user mandated it or if there's an error. Note that if we
1342 * generate because the user forced us to, a check condition
1343 * is generated and the ATA register values are returned
1344 * whether the command completed successfully or not. If there
1345 * was no error, SK, ASC and ASCQ will all be zero.
1347 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1348 ((cdb[2] & 0x20) || need_sense)) {
1349 ata_gen_ata_desc_sense(qc);
1352 cmd->result = SAM_STAT_GOOD;
1354 /* TODO: decide which descriptor format to use
1355 * for 48b LBA devices and call that here
1356 * instead of the fixed desc, which is only
1357 * good for smaller LBA (and maybe CHS?)
1360 ata_gen_fixed_sense(qc);
1365 /* The ata_gen_..._sense routines fill in tf */
1366 ata_dump_status(qc->ap->id, &qc->tf);
1375 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1376 * @ap: ATA port to which the command is addressed
1377 * @dev: ATA device to which the command is addressed
1378 * @cmd: SCSI command to execute
1379 * @done: SCSI command completion function
1380 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1382 * Our ->queuecommand() function has decided that the SCSI
1383 * command issued can be directly translated into an ATA
1384 * command, rather than handled internally.
1386 * This function sets up an ata_queued_cmd structure for the
1387 * SCSI command, and sends that ata_queued_cmd to the hardware.
1389 * The xlat_func argument (actor) returns 0 if ready to execute
1390 * ATA command, else 1 to finish translation. If 1 is returned
1391 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1392 * to be set reflecting an error condition or clean (early)
1396 * spin_lock_irqsave(host_set lock)
1399 static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
1400 struct scsi_cmnd *cmd,
1401 void (*done)(struct scsi_cmnd *),
1402 ata_xlat_func_t xlat_func)
1404 struct ata_queued_cmd *qc;
1405 u8 *scsicmd = cmd->cmnd;
1409 qc = ata_scsi_qc_new(ap, dev, cmd, done);
1413 /* data is present; dma-map it */
1414 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1415 cmd->sc_data_direction == DMA_TO_DEVICE) {
1416 if (unlikely(cmd->request_bufflen < 1)) {
1417 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
1418 ap->id, dev->devno);
1423 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1425 ata_sg_init_one(qc, cmd->request_buffer,
1426 cmd->request_bufflen);
1428 qc->dma_dir = cmd->sc_data_direction;
1431 qc->complete_fn = ata_scsi_qc_complete;
1433 if (xlat_func(qc, scsicmd))
1436 /* select device, send command to hardware */
1437 qc->err_mask = ata_qc_issue(qc);
1439 ata_qc_complete(qc);
1447 DPRINTK("EXIT - early finish (good or error)\n");
1453 cmd->result = (DID_ERROR << 16);
1455 DPRINTK("EXIT - internal\n");
1460 * ata_scsi_rbuf_get - Map response buffer.
1461 * @cmd: SCSI command containing buffer to be mapped.
1462 * @buf_out: Pointer to mapped area.
1464 * Maps buffer contained within SCSI command @cmd.
1467 * spin_lock_irqsave(host_set lock)
1470 * Length of response buffer.
1473 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1476 unsigned int buflen;
1479 struct scatterlist *sg;
1481 sg = (struct scatterlist *) cmd->request_buffer;
1482 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1483 buflen = sg->length;
1485 buf = cmd->request_buffer;
1486 buflen = cmd->request_bufflen;
1494 * ata_scsi_rbuf_put - Unmap response buffer.
1495 * @cmd: SCSI command containing buffer to be unmapped.
1496 * @buf: buffer to unmap
1498 * Unmaps response buffer contained within @cmd.
1501 * spin_lock_irqsave(host_set lock)
1504 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1507 struct scatterlist *sg;
1509 sg = (struct scatterlist *) cmd->request_buffer;
1510 kunmap_atomic(buf - sg->offset, KM_USER0);
1515 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1516 * @args: device IDENTIFY data / SCSI command of interest.
1517 * @actor: Callback hook for desired SCSI command simulator
1519 * Takes care of the hard work of simulating a SCSI command...
1520 * Mapping the response buffer, calling the command's handler,
1521 * and handling the handler's return value. This return value
1522 * indicates whether the handler wishes the SCSI command to be
1523 * completed successfully (0), or not (in which case cmd->result
1524 * and sense buffer are assumed to be set).
1527 * spin_lock_irqsave(host_set lock)
1530 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1531 unsigned int (*actor) (struct ata_scsi_args *args,
1532 u8 *rbuf, unsigned int buflen))
1535 unsigned int buflen, rc;
1536 struct scsi_cmnd *cmd = args->cmd;
1538 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1539 memset(rbuf, 0, buflen);
1540 rc = actor(args, rbuf, buflen);
1541 ata_scsi_rbuf_put(cmd, rbuf);
1544 cmd->result = SAM_STAT_GOOD;
1549 * ata_scsiop_inq_std - Simulate INQUIRY command
1550 * @args: device IDENTIFY data / SCSI command of interest.
1551 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1552 * @buflen: Response buffer length.
1554 * Returns standard device identification data associated
1555 * with non-VPD INQUIRY command output.
1558 * spin_lock_irqsave(host_set lock)
1561 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1562 unsigned int buflen)
1567 0x5, /* claim SPC-3 version compatibility */
1572 /* set scsi removeable (RMB) bit per ata bit */
1573 if (ata_id_removeable(args->id))
1578 memcpy(rbuf, hdr, sizeof(hdr));
1581 memcpy(&rbuf[8], "ATA ", 8);
1582 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1583 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1584 if (rbuf[32] == 0 || rbuf[32] == ' ')
1585 memcpy(&rbuf[32], "n/a ", 4);
1589 const u8 versions[] = {
1590 0x60, /* SAM-3 (no version claimed) */
1593 0x20, /* SBC-2 (no version claimed) */
1596 0x60 /* SPC-3 (no version claimed) */
1599 memcpy(rbuf + 59, versions, sizeof(versions));
1606 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1607 * @args: device IDENTIFY data / SCSI command of interest.
1608 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1609 * @buflen: Response buffer length.
1611 * Returns list of inquiry VPD pages available.
1614 * spin_lock_irqsave(host_set lock)
1617 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1618 unsigned int buflen)
1620 const u8 pages[] = {
1621 0x00, /* page 0x00, this page */
1622 0x80, /* page 0x80, unit serial no page */
1623 0x83 /* page 0x83, device ident page */
1625 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1628 memcpy(rbuf + 4, pages, sizeof(pages));
1634 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1635 * @args: device IDENTIFY data / SCSI command of interest.
1636 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1637 * @buflen: Response buffer length.
1639 * Returns ATA device serial number.
1642 * spin_lock_irqsave(host_set lock)
1645 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1646 unsigned int buflen)
1650 0x80, /* this page code */
1652 ATA_SERNO_LEN, /* page len */
1654 memcpy(rbuf, hdr, sizeof(hdr));
1656 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1657 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1658 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1664 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1665 * @args: device IDENTIFY data / SCSI command of interest.
1666 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1667 * @buflen: Response buffer length.
1669 * Yields two logical unit device identification designators:
1670 * - vendor specific ASCII containing the ATA serial number
1671 * - SAT defined "t10 vendor id based" containing ASCII vendor
1672 * name ("ATA "), model and serial numbers.
1675 * spin_lock_irqsave(host_set lock)
1678 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1679 unsigned int buflen)
1682 const int sat_model_serial_desc_len = 68;
1683 const int ata_model_byte_len = 40;
1685 rbuf[1] = 0x83; /* this page code */
1688 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1689 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1691 rbuf[num + 3] = ATA_SERNO_LEN;
1693 ata_id_string(args->id, (unsigned char *) rbuf + num,
1694 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1695 num += ATA_SERNO_LEN;
1697 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1698 /* SAT defined lu model and serial numbers descriptor */
1699 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1702 rbuf[num + 3] = sat_model_serial_desc_len;
1704 memcpy(rbuf + num, "ATA ", 8);
1706 ata_id_string(args->id, (unsigned char *) rbuf + num,
1707 ATA_ID_PROD_OFS, ata_model_byte_len);
1708 num += ata_model_byte_len;
1709 ata_id_string(args->id, (unsigned char *) rbuf + num,
1710 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1711 num += ATA_SERNO_LEN;
1713 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1718 * ata_scsiop_noop - Command handler that simply returns success.
1719 * @args: device IDENTIFY data / SCSI command of interest.
1720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1721 * @buflen: Response buffer length.
1723 * No operation. Simply returns success to caller, to indicate
1724 * that the caller should successfully complete this SCSI command.
1727 * spin_lock_irqsave(host_set lock)
1730 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1731 unsigned int buflen)
1738 * ata_msense_push - Push data onto MODE SENSE data output buffer
1739 * @ptr_io: (input/output) Location to store more output data
1740 * @last: End of output data buffer
1741 * @buf: Pointer to BLOB being added to output buffer
1742 * @buflen: Length of BLOB
1744 * Store MODE SENSE data on an output buffer.
1750 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1751 const u8 *buf, unsigned int buflen)
1755 if ((ptr + buflen - 1) > last)
1758 memcpy(ptr, buf, buflen);
1766 * ata_msense_caching - Simulate MODE SENSE caching info page
1767 * @id: device IDENTIFY data
1768 * @ptr_io: (input/output) Location to store more output data
1769 * @last: End of output data buffer
1771 * Generate a caching info page, which conditionally indicates
1772 * write caching to the SCSI layer, depending on device
1779 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1782 u8 page[CACHE_MPAGE_LEN];
1784 memcpy(page, def_cache_mpage, sizeof(page));
1785 if (ata_id_wcache_enabled(id))
1786 page[2] |= (1 << 2); /* write cache enable */
1787 if (!ata_id_rahead_enabled(id))
1788 page[12] |= (1 << 5); /* disable read ahead */
1790 ata_msense_push(ptr_io, last, page, sizeof(page));
1791 return sizeof(page);
1795 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1796 * @dev: Device associated with this MODE SENSE command
1797 * @ptr_io: (input/output) Location to store more output data
1798 * @last: End of output data buffer
1800 * Generate a generic MODE SENSE control mode page.
1806 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1808 ata_msense_push(ptr_io, last, def_control_mpage,
1809 sizeof(def_control_mpage));
1810 return sizeof(def_control_mpage);
1814 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1815 * @dev: Device associated with this MODE SENSE command
1816 * @ptr_io: (input/output) Location to store more output data
1817 * @last: End of output data buffer
1819 * Generate a generic MODE SENSE r/w error recovery page.
1825 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1828 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1829 sizeof(def_rw_recovery_mpage));
1830 return sizeof(def_rw_recovery_mpage);
1834 * We can turn this into a real blacklist if it's needed, for now just
1835 * blacklist any Maxtor BANC1G10 revision firmware
1837 static int ata_dev_supports_fua(u16 *id)
1839 unsigned char model[41], fw[9];
1843 if (!ata_id_has_fua(id))
1846 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1847 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
1849 if (strcmp(model, "Maxtor"))
1851 if (strcmp(fw, "BANC1G10"))
1854 return 0; /* blacklisted */
1858 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1859 * @args: device IDENTIFY data / SCSI command of interest.
1860 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1861 * @buflen: Response buffer length.
1863 * Simulate MODE SENSE commands. Assume this is invoked for direct
1864 * access devices (e.g. disks) only. There should be no block
1865 * descriptor for other device types.
1868 * spin_lock_irqsave(host_set lock)
1871 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1872 unsigned int buflen)
1874 struct ata_device *dev = args->dev;
1875 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1876 const u8 sat_blk_desc[] = {
1877 0, 0, 0, 0, /* number of blocks: sat unspecified */
1879 0, 0x2, 0x0 /* block length: 512 bytes */
1882 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1887 six_byte = (scsicmd[0] == MODE_SENSE);
1888 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1890 * LLBA bit in msense(10) ignored (compliant)
1893 page_control = scsicmd[2] >> 6;
1894 switch (page_control) {
1895 case 0: /* current */
1896 break; /* supported */
1898 goto saving_not_supp;
1899 case 1: /* changeable */
1900 case 2: /* defaults */
1906 output_len = 4 + (ebd ? 8 : 0);
1907 alloc_len = scsicmd[4];
1909 output_len = 8 + (ebd ? 8 : 0);
1910 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1912 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1914 p = rbuf + output_len;
1915 last = rbuf + minlen - 1;
1917 pg = scsicmd[2] & 0x3f;
1920 * No mode subpages supported (yet) but asking for _all_
1921 * subpages may be valid
1923 if (spg && (spg != ALL_SUB_MPAGES))
1927 case RW_RECOVERY_MPAGE:
1928 output_len += ata_msense_rw_recovery(&p, last);
1932 output_len += ata_msense_caching(args->id, &p, last);
1935 case CONTROL_MPAGE: {
1936 output_len += ata_msense_ctl_mode(&p, last);
1941 output_len += ata_msense_rw_recovery(&p, last);
1942 output_len += ata_msense_caching(args->id, &p, last);
1943 output_len += ata_msense_ctl_mode(&p, last);
1946 default: /* invalid page code */
1954 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
1955 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1960 rbuf[0] = output_len;
1965 rbuf[3] = sizeof(sat_blk_desc);
1967 memcpy(rbuf + 4, sat_blk_desc,
1968 sizeof(sat_blk_desc));
1972 rbuf[0] = output_len >> 8;
1974 rbuf[1] = output_len;
1979 rbuf[7] = sizeof(sat_blk_desc);
1981 memcpy(rbuf + 8, sat_blk_desc,
1982 sizeof(sat_blk_desc));
1988 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1989 /* "Invalid field in cbd" */
1993 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1994 /* "Saving parameters not supported" */
1999 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2000 * @args: device IDENTIFY data / SCSI command of interest.
2001 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2002 * @buflen: Response buffer length.
2004 * Simulate READ CAPACITY commands.
2007 * spin_lock_irqsave(host_set lock)
2010 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2011 unsigned int buflen)
2018 if (ata_id_has_lba(args->id)) {
2019 if (ata_id_has_lba48(args->id))
2020 n_sectors = ata_id_u64(args->id, 100);
2022 n_sectors = ata_id_u32(args->id, 60);
2024 /* CHS default translation */
2025 n_sectors = args->id[1] * args->id[3] * args->id[6];
2027 if (ata_id_current_chs_valid(args->id))
2028 /* CHS current translation */
2029 n_sectors = ata_id_u32(args->id, 57);
2032 n_sectors--; /* ATA TotalUserSectors - 1 */
2034 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2035 if( n_sectors >= 0xffffffffULL )
2036 tmp = 0xffffffff ; /* Return max count on overflow */
2040 /* sector count, 32-bit */
2041 rbuf[0] = tmp >> (8 * 3);
2042 rbuf[1] = tmp >> (8 * 2);
2043 rbuf[2] = tmp >> (8 * 1);
2047 tmp = ATA_SECT_SIZE;
2052 /* sector count, 64-bit */
2053 tmp = n_sectors >> (8 * 4);
2054 rbuf[2] = tmp >> (8 * 3);
2055 rbuf[3] = tmp >> (8 * 2);
2056 rbuf[4] = tmp >> (8 * 1);
2059 rbuf[6] = tmp >> (8 * 3);
2060 rbuf[7] = tmp >> (8 * 2);
2061 rbuf[8] = tmp >> (8 * 1);
2065 tmp = ATA_SECT_SIZE;
2066 rbuf[12] = tmp >> 8;
2074 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2075 * @args: device IDENTIFY data / SCSI command of interest.
2076 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2077 * @buflen: Response buffer length.
2079 * Simulate REPORT LUNS command.
2082 * spin_lock_irqsave(host_set lock)
2085 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2086 unsigned int buflen)
2089 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2095 * ata_scsi_set_sense - Set SCSI sense data and status
2096 * @cmd: SCSI request to be handled
2097 * @sk: SCSI-defined sense key
2098 * @asc: SCSI-defined additional sense code
2099 * @ascq: SCSI-defined additional sense code qualifier
2101 * Helper function that builds a valid fixed format, current
2102 * response code and the given sense key (sk), additional sense
2103 * code (asc) and additional sense code qualifier (ascq) with
2104 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2105 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2111 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2113 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2115 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2116 cmd->sense_buffer[2] = sk;
2117 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2118 cmd->sense_buffer[12] = asc;
2119 cmd->sense_buffer[13] = ascq;
2123 * ata_scsi_badcmd - End a SCSI request with an error
2124 * @cmd: SCSI request to be handled
2125 * @done: SCSI command completion function
2126 * @asc: SCSI-defined additional sense code
2127 * @ascq: SCSI-defined additional sense code qualifier
2129 * Helper function that completes a SCSI command with
2130 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2131 * and the specified additional sense codes.
2134 * spin_lock_irqsave(host_set lock)
2137 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2140 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2145 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2147 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
2148 /* FIXME: not quite right; we don't want the
2149 * translation of taskfile registers into
2150 * a sense descriptors, since that's only
2151 * correct for ATA, not ATAPI
2153 ata_gen_ata_desc_sense(qc);
2155 qc->scsidone(qc->scsicmd);
2159 /* is it pointless to prefer PIO for "safety reasons"? */
2160 static inline int ata_pio_use_silly(struct ata_port *ap)
2162 return (ap->flags & ATA_FLAG_PIO_DMA);
2165 static void atapi_request_sense(struct ata_queued_cmd *qc)
2167 struct ata_port *ap = qc->ap;
2168 struct scsi_cmnd *cmd = qc->scsicmd;
2170 DPRINTK("ATAPI request sense\n");
2172 /* FIXME: is this needed? */
2173 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2175 ap->ops->tf_read(ap, &qc->tf);
2177 /* fill these in, for the case where they are -not- overwritten */
2178 cmd->sense_buffer[0] = 0x70;
2179 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2183 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2184 qc->dma_dir = DMA_FROM_DEVICE;
2186 memset(&qc->cdb, 0, qc->dev->cdb_len);
2187 qc->cdb[0] = REQUEST_SENSE;
2188 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2190 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2191 qc->tf.command = ATA_CMD_PACKET;
2193 if (ata_pio_use_silly(ap)) {
2194 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2195 qc->tf.feature |= ATAPI_PKT_DMA;
2197 qc->tf.protocol = ATA_PROT_ATAPI;
2198 qc->tf.lbam = (8 * 1024) & 0xff;
2199 qc->tf.lbah = (8 * 1024) >> 8;
2201 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2203 qc->complete_fn = atapi_sense_complete;
2205 qc->err_mask = ata_qc_issue(qc);
2207 ata_qc_complete(qc);
2212 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2214 struct scsi_cmnd *cmd = qc->scsicmd;
2215 unsigned int err_mask = qc->err_mask;
2217 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2219 if (unlikely(err_mask & AC_ERR_DEV)) {
2220 cmd->result = SAM_STAT_CHECK_CONDITION;
2221 atapi_request_sense(qc);
2225 else if (unlikely(err_mask))
2226 /* FIXME: not quite right; we don't want the
2227 * translation of taskfile registers into
2228 * a sense descriptors, since that's only
2229 * correct for ATA, not ATAPI
2231 ata_gen_ata_desc_sense(qc);
2234 u8 *scsicmd = cmd->cmnd;
2236 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2238 unsigned int buflen;
2240 buflen = ata_scsi_rbuf_get(cmd, &buf);
2242 /* ATAPI devices typically report zero for their SCSI version,
2243 * and sometimes deviate from the spec WRT response data
2244 * format. If SCSI version is reported as zero like normal,
2245 * then we make the following fixups: 1) Fake MMC-5 version,
2246 * to indicate to the Linux scsi midlayer this is a modern
2247 * device. 2) Ensure response data format / ATAPI information
2248 * are always correct.
2255 ata_scsi_rbuf_put(cmd, buf);
2258 cmd->result = SAM_STAT_GOOD;
2265 * atapi_xlat - Initialize PACKET taskfile
2266 * @qc: command structure to be initialized
2267 * @scsicmd: SCSI CDB associated with this PACKET command
2270 * spin_lock_irqsave(host_set lock)
2273 * Zero on success, non-zero on failure.
2276 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2278 struct scsi_cmnd *cmd = qc->scsicmd;
2279 struct ata_device *dev = qc->dev;
2280 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2281 int nodata = (cmd->sc_data_direction == DMA_NONE);
2284 /* Check whether ATAPI DMA is safe */
2285 if (ata_check_atapi_dma(qc))
2288 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
2290 qc->complete_fn = atapi_qc_complete;
2292 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2293 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2294 qc->tf.flags |= ATA_TFLAG_WRITE;
2295 DPRINTK("direction: write\n");
2298 qc->tf.command = ATA_CMD_PACKET;
2300 /* no data, or PIO data xfer */
2301 if (using_pio || nodata) {
2303 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2305 qc->tf.protocol = ATA_PROT_ATAPI;
2306 qc->tf.lbam = (8 * 1024) & 0xff;
2307 qc->tf.lbah = (8 * 1024) >> 8;
2312 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2313 qc->tf.feature |= ATAPI_PKT_DMA;
2315 #ifdef ATAPI_ENABLE_DMADIR
2316 /* some SATA bridges need us to indicate data xfer direction */
2317 if (cmd->sc_data_direction != DMA_TO_DEVICE)
2318 qc->tf.feature |= ATAPI_DMADIR;
2322 qc->nbytes = cmd->bufflen;
2328 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2329 * @ap: ATA port to which the device is attached
2330 * @scsidev: SCSI device from which we derive the ATA device
2332 * Given various information provided in struct scsi_cmnd,
2333 * map that onto an ATA bus, and using that mapping
2334 * determine which ata_device is associated with the
2335 * SCSI command to be sent.
2338 * spin_lock_irqsave(host_set lock)
2341 * Associated ATA device, or %NULL if not found.
2344 static struct ata_device *
2345 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2347 struct ata_device *dev;
2349 /* skip commands not addressed to targets we simulate */
2350 if (likely(scsidev->id < ATA_MAX_DEVICES))
2351 dev = &ap->device[scsidev->id];
2355 if (unlikely((scsidev->channel != 0) ||
2356 (scsidev->lun != 0)))
2359 if (unlikely(!ata_dev_present(dev)))
2362 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2363 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2364 printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2365 ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
2374 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2375 * @byte1: Byte 1 from pass-thru CDB.
2378 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2381 ata_scsi_map_proto(u8 byte1)
2383 switch((byte1 & 0x1e) >> 1) {
2384 case 3: /* Non-data */
2385 return ATA_PROT_NODATA;
2388 return ATA_PROT_DMA;
2390 case 4: /* PIO Data-in */
2391 case 5: /* PIO Data-out */
2392 return ATA_PROT_PIO;
2394 case 10: /* Device Reset */
2395 case 0: /* Hard Reset */
2397 case 2: /* Bus Idle */
2398 case 7: /* Packet */
2399 case 8: /* DMA Queued */
2400 case 9: /* Device Diagnostic */
2401 case 11: /* UDMA Data-in */
2402 case 12: /* UDMA Data-Out */
2403 case 13: /* FPDMA */
2404 default: /* Reserved */
2408 return ATA_PROT_UNKNOWN;
2412 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2413 * @qc: command structure to be initialized
2414 * @scsicmd: SCSI command to convert
2416 * Handles either 12 or 16-byte versions of the CDB.
2419 * Zero on success, non-zero on failure.
2422 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2424 struct ata_taskfile *tf = &(qc->tf);
2425 struct scsi_cmnd *cmd = qc->scsicmd;
2427 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2430 if (scsicmd[1] & 0xe0)
2431 /* PIO multi not supported yet */
2435 * 12 and 16 byte CDBs use different offsets to
2436 * provide the various register values.
2438 if (scsicmd[0] == ATA_16) {
2440 * 16-byte CDB - may contain extended commands.
2442 * If that is the case, copy the upper byte register values.
2444 if (scsicmd[1] & 0x01) {
2445 tf->hob_feature = scsicmd[3];
2446 tf->hob_nsect = scsicmd[5];
2447 tf->hob_lbal = scsicmd[7];
2448 tf->hob_lbam = scsicmd[9];
2449 tf->hob_lbah = scsicmd[11];
2450 tf->flags |= ATA_TFLAG_LBA48;
2452 tf->flags &= ~ATA_TFLAG_LBA48;
2455 * Always copy low byte, device and command registers.
2457 tf->feature = scsicmd[4];
2458 tf->nsect = scsicmd[6];
2459 tf->lbal = scsicmd[8];
2460 tf->lbam = scsicmd[10];
2461 tf->lbah = scsicmd[12];
2462 tf->device = scsicmd[13];
2463 tf->command = scsicmd[14];
2466 * 12-byte CDB - incapable of extended commands.
2468 tf->flags &= ~ATA_TFLAG_LBA48;
2470 tf->feature = scsicmd[3];
2471 tf->nsect = scsicmd[4];
2472 tf->lbal = scsicmd[5];
2473 tf->lbam = scsicmd[6];
2474 tf->lbah = scsicmd[7];
2475 tf->device = scsicmd[8];
2476 tf->command = scsicmd[9];
2479 * If slave is possible, enforce correct master/slave bit
2481 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2482 tf->device = qc->dev->devno ?
2483 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2486 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2487 * SET_FEATURES - XFER MODE must be preceded/succeeded
2488 * by an update to hardware-specific registers for each
2489 * controller (i.e. the reason for ->set_piomode(),
2490 * ->set_dmamode(), and ->post_set_mode() hooks).
2492 if ((tf->command == ATA_CMD_SET_FEATURES)
2493 && (tf->feature == SETFEATURES_XFER))
2497 * Set flags so that all registers will be written,
2498 * and pass on write indication (used for PIO/DMA
2501 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2503 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2504 tf->flags |= ATA_TFLAG_WRITE;
2507 * Set transfer length.
2509 * TODO: find out if we need to do more here to
2510 * cover scatter/gather case.
2512 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2517 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2518 /* "Invalid field in cdb" */
2523 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2525 * @cmd: SCSI command opcode to consider
2527 * Look up the SCSI command given, and determine whether the
2528 * SCSI command is to be translated or simulated.
2531 * Pointer to translation function if possible, %NULL if not.
2534 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2544 return ata_scsi_rw_xlat;
2546 case SYNCHRONIZE_CACHE:
2547 if (ata_try_flush_cache(dev))
2548 return ata_scsi_flush_xlat;
2553 return ata_scsi_verify_xlat;
2557 return ata_scsi_pass_thru;
2560 return ata_scsi_start_stop_xlat;
2567 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2568 * @ap: ATA port to which the command was being sent
2569 * @cmd: SCSI command to dump
2571 * Prints the contents of a SCSI command via printk().
2574 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2575 struct scsi_cmnd *cmd)
2578 struct scsi_device *scsidev = cmd->device;
2579 u8 *scsicmd = cmd->cmnd;
2581 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2583 scsidev->channel, scsidev->id, scsidev->lun,
2584 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2585 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2591 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2592 * @cmd: SCSI command to be sent
2593 * @done: Completion function, called when command is complete
2595 * In some cases, this function translates SCSI commands into
2596 * ATA taskfiles, and queues the taskfiles to be sent to
2597 * hardware. In other cases, this function simulates a
2598 * SCSI device by evaluating and responding to certain
2599 * SCSI commands. This creates the overall effect of
2600 * ATA and ATAPI devices appearing as SCSI devices.
2603 * Releases scsi-layer-held lock, and obtains host_set lock.
2609 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2611 struct ata_port *ap;
2612 struct ata_device *dev;
2613 struct scsi_device *scsidev = cmd->device;
2614 struct Scsi_Host *shost = scsidev->host;
2616 ap = (struct ata_port *) &shost->hostdata[0];
2618 spin_unlock(shost->host_lock);
2619 spin_lock(&ap->host_set->lock);
2621 ata_scsi_dump_cdb(ap, cmd);
2623 dev = ata_scsi_find_dev(ap, scsidev);
2624 if (unlikely(!dev)) {
2625 cmd->result = (DID_BAD_TARGET << 16);
2630 if (dev->class == ATA_DEV_ATA) {
2631 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2635 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
2637 ata_scsi_simulate(ap, dev, cmd, done);
2639 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
2642 spin_unlock(&ap->host_set->lock);
2643 spin_lock(shost->host_lock);
2648 * ata_scsi_simulate - simulate SCSI command on ATA device
2649 * @ap: port the device is connected to
2650 * @dev: the target device
2651 * @cmd: SCSI command being sent to device.
2652 * @done: SCSI command completion function.
2654 * Interprets and directly executes a select list of SCSI commands
2655 * that can be handled internally.
2658 * spin_lock_irqsave(host_set lock)
2661 void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
2662 struct scsi_cmnd *cmd,
2663 void (*done)(struct scsi_cmnd *))
2665 struct ata_scsi_args args;
2666 const u8 *scsicmd = cmd->cmnd;
2674 switch(scsicmd[0]) {
2675 /* no-op's, complete with success */
2676 case SYNCHRONIZE_CACHE:
2680 case TEST_UNIT_READY:
2681 case FORMAT_UNIT: /* FIXME: correct? */
2682 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2683 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2687 if (scsicmd[1] & 2) /* is CmdDt set? */
2688 ata_scsi_invalid_field(cmd, done);
2689 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2690 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2691 else if (scsicmd[2] == 0x00)
2692 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2693 else if (scsicmd[2] == 0x80)
2694 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2695 else if (scsicmd[2] == 0x83)
2696 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2698 ata_scsi_invalid_field(cmd, done);
2703 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2706 case MODE_SELECT: /* unconditionally return */
2707 case MODE_SELECT_10: /* bad-field-in-cdb */
2708 ata_scsi_invalid_field(cmd, done);
2712 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2715 case SERVICE_ACTION_IN:
2716 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2717 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2719 ata_scsi_invalid_field(cmd, done);
2723 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2726 /* mandatory commands we haven't implemented yet */
2729 /* all other commands */
2731 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2732 /* "Invalid command operation code" */
2738 void ata_scsi_scan_host(struct ata_port *ap)
2740 struct ata_device *dev;
2743 if (ap->flags & ATA_FLAG_PORT_DISABLED)
2746 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2747 dev = &ap->device[i];
2749 if (ata_dev_present(dev))
2750 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);