2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_eh.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_request.h>
44 #include <linux/libata.h>
45 #include <linux/hdreg.h>
46 #include <asm/uaccess.h>
50 #define SECTOR_SIZE 512
52 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
53 static struct ata_device *
54 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
56 #define RW_RECOVERY_MPAGE 0x1
57 #define RW_RECOVERY_MPAGE_LEN 12
58 #define CACHE_MPAGE 0x8
59 #define CACHE_MPAGE_LEN 20
60 #define CONTROL_MPAGE 0xa
61 #define CONTROL_MPAGE_LEN 12
62 #define ALL_MPAGES 0x3f
63 #define ALL_SUB_MPAGES 0xff
66 static const u8 def_rw_recovery_mpage[] = {
68 RW_RECOVERY_MPAGE_LEN - 2,
69 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
70 (1 << 6), /* ARRE (auto read reallocation) */
71 0, /* read retry count */
73 0, /* write retry count */
77 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
80 0, /* contains WCE, needs to be 0 for logic */
81 0, 0, 0, 0, 0, 0, 0, 0, 0,
82 0, /* contains DRA, needs to be 0 for logic */
86 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
88 CONTROL_MPAGE_LEN - 2,
89 2, /* DSENSE=0, GLTSD=1 */
90 0, /* [QAM+QERR may be 1, see 05-359r1] */
91 0, 0, 0, 0, 0xff, 0xff,
92 0, 30 /* extended self test time, see 05-359r1 */
96 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
97 void (*done)(struct scsi_cmnd *))
99 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
100 /* "Invalid field in cbd" */
105 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
106 * @sdev: SCSI device for which BIOS geometry is to be determined
107 * @bdev: block device associated with @sdev
108 * @capacity: capacity of SCSI device
109 * @geom: location to which geometry will be output
111 * Generic bios head/sector/cylinder calculator
112 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
113 * mapping. Some situations may arise where the disk is not
114 * bootable if this is not used.
117 * Defined by the SCSI layer. We don't really care.
122 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
123 sector_t capacity, int geom[])
127 sector_div(capacity, 255*63);
134 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
135 * @scsidev: Device to which we are issuing command
136 * @arg: User provided data for issuing command
139 * Defined by the SCSI layer. We don't really care.
142 * Zero on success, negative errno on error.
145 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
148 u8 scsi_cmd[MAX_COMMAND_SIZE];
149 u8 args[4], *argbuf = NULL;
151 struct scsi_sense_hdr sshdr;
152 enum dma_data_direction data_dir;
157 if (copy_from_user(args, arg, sizeof(args)))
160 memset(scsi_cmd, 0, sizeof(scsi_cmd));
163 argsize = SECTOR_SIZE * args[3];
164 argbuf = kmalloc(argsize, GFP_KERNEL);
165 if (argbuf == NULL) {
170 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
171 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
172 block count in sector count field */
173 data_dir = DMA_FROM_DEVICE;
175 scsi_cmd[1] = (3 << 1); /* Non-data */
176 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
180 scsi_cmd[0] = ATA_16;
182 scsi_cmd[4] = args[2];
183 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
184 scsi_cmd[6] = args[3];
185 scsi_cmd[8] = args[1];
189 scsi_cmd[6] = args[1];
191 scsi_cmd[14] = args[0];
193 /* Good values for timeout and retries? Values below
194 from scsi_ioctl_send_command() for default case... */
195 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
196 &sshdr, (10*HZ), 5)) {
201 /* Need code to retrieve data from check condition? */
204 && copy_to_user(arg + sizeof(args), argbuf, argsize))
214 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
215 * @scsidev: Device to which we are issuing command
216 * @arg: User provided data for issuing command
219 * Defined by the SCSI layer. We don't really care.
222 * Zero on success, negative errno on error.
224 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
227 u8 scsi_cmd[MAX_COMMAND_SIZE];
229 struct scsi_sense_hdr sshdr;
234 if (copy_from_user(args, arg, sizeof(args)))
237 memset(scsi_cmd, 0, sizeof(scsi_cmd));
238 scsi_cmd[0] = ATA_16;
239 scsi_cmd[1] = (3 << 1); /* Non-data */
240 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
241 scsi_cmd[4] = args[1];
242 scsi_cmd[6] = args[2];
243 scsi_cmd[8] = args[3];
244 scsi_cmd[10] = args[4];
245 scsi_cmd[12] = args[5];
246 scsi_cmd[14] = args[0];
248 /* Good values for timeout and retries? Values below
249 from scsi_ioctl_send_command() for default case... */
250 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
254 /* Need code to retrieve data from check condition? */
258 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
261 struct ata_device *dev;
262 int val = -EINVAL, rc = -EINVAL;
264 ap = (struct ata_port *) &scsidev->host->hostdata[0];
268 dev = ata_scsi_find_dev(ap, scsidev);
275 case ATA_IOC_GET_IO32:
277 if (copy_to_user(arg, &val, 1))
281 case ATA_IOC_SET_IO32:
282 val = (unsigned long) arg;
288 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
290 return ata_cmd_ioctl(scsidev, arg);
292 case HDIO_DRIVE_TASK:
293 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
295 return ata_task_ioctl(scsidev, arg);
307 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
308 * @ap: ATA port to which the new command is attached
309 * @dev: ATA device to which the new command is attached
310 * @cmd: SCSI command that originated this ATA command
311 * @done: SCSI command completion function
313 * Obtain a reference to an unused ata_queued_cmd structure,
314 * which is the basic libata structure representing a single
315 * ATA command sent to the hardware.
317 * If a command was available, fill in the SCSI-specific
318 * portions of the structure with information on the
322 * spin_lock_irqsave(host_set lock)
325 * Command allocated, or %NULL if none available.
327 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
328 struct ata_device *dev,
329 struct scsi_cmnd *cmd,
330 void (*done)(struct scsi_cmnd *))
332 struct ata_queued_cmd *qc;
334 qc = ata_qc_new_init(ap, dev);
340 qc->__sg = (struct scatterlist *) cmd->request_buffer;
341 qc->n_elem = cmd->use_sg;
343 qc->__sg = &qc->sgent;
347 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
355 * ata_dump_status - user friendly display of error info
356 * @id: id of the port in question
357 * @tf: ptr to filled out taskfile
359 * Decode and dump the ATA error/status registers for the user so
360 * that they have some idea what really happened at the non
361 * make-believe layer.
364 * inherited from caller
366 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
368 u8 stat = tf->command, err = tf->feature;
370 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
371 if (stat & ATA_BUSY) {
372 printk("Busy }\n"); /* Data is not valid in this case */
374 if (stat & 0x40) printk("DriveReady ");
375 if (stat & 0x20) printk("DeviceFault ");
376 if (stat & 0x10) printk("SeekComplete ");
377 if (stat & 0x08) printk("DataRequest ");
378 if (stat & 0x04) printk("CorrectedError ");
379 if (stat & 0x02) printk("Index ");
380 if (stat & 0x01) printk("Error ");
384 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
385 if (err & 0x04) printk("DriveStatusError ");
387 if (err & 0x04) printk("BadCRC ");
388 else printk("Sector ");
390 if (err & 0x40) printk("UncorrectableError ");
391 if (err & 0x10) printk("SectorIdNotFound ");
392 if (err & 0x02) printk("TrackZeroNotFound ");
393 if (err & 0x01) printk("AddrMarkNotFound ");
399 int ata_scsi_device_resume(struct scsi_device *sdev)
401 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
402 struct ata_device *dev = &ap->device[sdev->id];
404 return ata_device_resume(ap, dev);
407 int ata_scsi_device_suspend(struct scsi_device *sdev)
409 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
410 struct ata_device *dev = &ap->device[sdev->id];
412 return ata_device_suspend(ap, dev);
416 * ata_to_sense_error - convert ATA error to SCSI error
417 * @id: ATA device number
418 * @drv_stat: value contained in ATA status register
419 * @drv_err: value contained in ATA error register
420 * @sk: the sense key we'll fill out
421 * @asc: the additional sense code we'll fill out
422 * @ascq: the additional sense code qualifier we'll fill out
424 * Converts an ATA error into a SCSI error. Fill out pointers to
425 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
426 * format sense blocks.
429 * spin_lock_irqsave(host_set lock)
431 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
436 /* Based on the 3ware driver translation table */
437 static const unsigned char sense_table[][4] = {
439 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
441 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
443 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
444 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
445 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
446 /* MC|ID|ABRT|TRK0|MARK */
447 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
449 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
450 /* Bad address mark */
451 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
453 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
455 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
456 /* Media change request */
457 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
459 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
461 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
463 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
464 /* BBD - block marked bad */
465 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
466 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
468 static const unsigned char stat_table[][4] = {
469 /* Must be first because BUSY means no other bits valid */
470 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
471 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
472 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
473 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
474 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
478 * Is this an error we can process/parse
480 if (drv_stat & ATA_BUSY) {
481 drv_err = 0; /* Ignore the err bits, they're invalid */
485 /* Look for drv_err */
486 for (i = 0; sense_table[i][0] != 0xFF; i++) {
487 /* Look for best matches first */
488 if ((sense_table[i][0] & drv_err) ==
490 *sk = sense_table[i][1];
491 *asc = sense_table[i][2];
492 *ascq = sense_table[i][3];
496 /* No immediate match */
497 printk(KERN_WARNING "ata%u: no sense translation for "
498 "error 0x%02x\n", id, drv_err);
501 /* Fall back to interpreting status bits */
502 for (i = 0; stat_table[i][0] != 0xFF; i++) {
503 if (stat_table[i][0] & drv_stat) {
504 *sk = stat_table[i][1];
505 *asc = stat_table[i][2];
506 *ascq = stat_table[i][3];
510 /* No error? Undecoded? */
511 printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
514 /* For our last chance pick, use medium read error because
515 * it's much more common than an ATA drive telling you a write
519 *asc = 0x11; /* "unrecovered read error" */
520 *ascq = 0x04; /* "auto-reallocation failed" */
523 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
524 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
530 * ata_gen_ata_desc_sense - Generate check condition sense block.
531 * @qc: Command that completed.
533 * This function is specific to the ATA descriptor format sense
534 * block specified for the ATA pass through commands. Regardless
535 * of whether the command errored or not, return a sense
536 * block. Copy all controller registers into the sense
537 * block. Clear sense key, ASC & ASCQ if there is no error.
540 * spin_lock_irqsave(host_set lock)
542 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
544 struct scsi_cmnd *cmd = qc->scsicmd;
545 struct ata_taskfile *tf = &qc->tf;
546 unsigned char *sb = cmd->sense_buffer;
547 unsigned char *desc = sb + 8;
549 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
551 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
554 * Read the controller registers.
556 WARN_ON(qc->ap->ops->tf_read == NULL);
557 qc->ap->ops->tf_read(qc->ap, tf);
560 * Use ata_to_sense_error() to map status register bits
561 * onto sense key, asc & ascq.
563 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
564 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
565 &sb[1], &sb[2], &sb[3]);
570 * Sense data is current and format is descriptor.
577 * Set length of additional sense data.
578 * Since we only populate descriptor 0, the total
579 * length is the same (fixed) length as descriptor 0.
581 desc[1] = sb[7] = 14;
584 * Copy registers into sense buffer.
587 desc[3] = tf->feature; /* == error reg */
592 desc[12] = tf->device;
593 desc[13] = tf->command; /* == status reg */
596 * Fill in Extend bit, and the high order bytes
599 if (tf->flags & ATA_TFLAG_LBA48) {
601 desc[4] = tf->hob_nsect;
602 desc[6] = tf->hob_lbal;
603 desc[8] = tf->hob_lbam;
604 desc[10] = tf->hob_lbah;
609 * ata_gen_fixed_sense - generate a SCSI fixed sense block
610 * @qc: Command that we are erroring out
612 * Leverage ata_to_sense_error() to give us the codes. Fit our
613 * LBA in here if there's room.
616 * inherited from caller
618 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
620 struct scsi_cmnd *cmd = qc->scsicmd;
621 struct ata_taskfile *tf = &qc->tf;
622 unsigned char *sb = cmd->sense_buffer;
624 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
626 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
629 * Read the controller registers.
631 WARN_ON(qc->ap->ops->tf_read == NULL);
632 qc->ap->ops->tf_read(qc->ap, tf);
635 * Use ata_to_sense_error() to map status register bits
636 * onto sense key, asc & ascq.
638 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
639 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
640 &sb[2], &sb[12], &sb[13]);
647 if (tf->flags & ATA_TFLAG_LBA48) {
648 /* TODO: find solution for LBA48 descriptors */
651 else if (tf->flags & ATA_TFLAG_LBA) {
652 /* A small (28b) LBA will fit in the 32b info field */
653 sb[0] |= 0x80; /* set valid bit */
654 sb[3] = tf->device & 0x0f;
665 static void ata_scsi_sdev_config(struct scsi_device *sdev)
667 sdev->use_10_for_rw = 1;
668 sdev->use_10_for_ms = 1;
671 static void ata_scsi_dev_config(struct scsi_device *sdev,
672 struct ata_device *dev)
674 unsigned int max_sectors;
676 /* TODO: 2048 is an arbitrary number, not the
677 * hardware maximum. This should be increased to
678 * 65534 when Jens Axboe's patch for dynamically
679 * determining max_sectors is merged.
681 max_sectors = ATA_MAX_SECTORS;
682 if (dev->flags & ATA_DFLAG_LBA48)
684 if (dev->max_sectors)
685 max_sectors = dev->max_sectors;
687 blk_queue_max_sectors(sdev->request_queue, max_sectors);
690 * SATA DMA transfers must be multiples of 4 byte, so
691 * we need to pad ATAPI transfers using an extra sg.
692 * Decrement max hw segments accordingly.
694 if (dev->class == ATA_DEV_ATAPI) {
695 request_queue_t *q = sdev->request_queue;
696 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
701 * ata_scsi_slave_config - Set SCSI device attributes
702 * @sdev: SCSI device to examine
704 * This is called before we actually start reading
705 * and writing to the device, to configure certain
706 * SCSI mid-layer behaviors.
709 * Defined by SCSI layer. We don't really care.
712 int ata_scsi_slave_config(struct scsi_device *sdev)
714 ata_scsi_sdev_config(sdev);
716 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
718 if (sdev->id < ATA_MAX_DEVICES) {
720 struct ata_device *dev;
722 ap = (struct ata_port *) &sdev->host->hostdata[0];
723 dev = &ap->device[sdev->id];
725 ata_scsi_dev_config(sdev, dev);
728 return 0; /* scsi layer doesn't check return value, sigh */
732 * ata_scsi_timed_out - SCSI layer time out callback
733 * @cmd: timed out SCSI command
735 * Handles SCSI layer timeout. We race with normal completion of
736 * the qc for @cmd. If the qc is already gone, we lose and let
737 * the scsi command finish (EH_HANDLED). Otherwise, the qc has
738 * timed out and EH should be invoked. Prevent ata_qc_complete()
739 * from finishing it by setting EH_SCHEDULED and return
743 * Called from timer context
746 * EH_HANDLED or EH_NOT_HANDLED
748 enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
750 struct Scsi_Host *host = cmd->device->host;
751 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
753 struct ata_queued_cmd *qc;
754 enum scsi_eh_timer_return ret = EH_HANDLED;
758 spin_lock_irqsave(&ap->host_set->lock, flags);
759 qc = ata_qc_from_tag(ap, ap->active_tag);
761 WARN_ON(qc->scsicmd != cmd);
762 qc->flags |= ATA_QCFLAG_EH_SCHEDULED;
763 qc->err_mask |= AC_ERR_TIMEOUT;
764 ret = EH_NOT_HANDLED;
766 spin_unlock_irqrestore(&ap->host_set->lock, flags);
768 DPRINTK("EXIT, ret=%d\n", ret);
773 * ata_scsi_error - SCSI layer error handler callback
774 * @host: SCSI host on which error occurred
776 * Handles SCSI-layer-thrown error events.
779 * Inherited from SCSI layer (none, can sleep)
785 int ata_scsi_error(struct Scsi_Host *host)
792 ap = (struct ata_port *) &host->hostdata[0];
794 spin_lock_irqsave(&ap->host_set->lock, flags);
795 WARN_ON(ap->flags & ATA_FLAG_IN_EH);
796 ap->flags |= ATA_FLAG_IN_EH;
797 WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
798 spin_unlock_irqrestore(&ap->host_set->lock, flags);
800 ata_port_flush_task(ap);
802 ap->ops->eng_timeout(ap);
804 WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q));
806 scsi_eh_flush_done_q(&ap->eh_done_q);
808 spin_lock_irqsave(&ap->host_set->lock, flags);
809 ap->flags &= ~ATA_FLAG_IN_EH;
810 spin_unlock_irqrestore(&ap->host_set->lock, flags);
816 static void ata_eh_scsidone(struct scsi_cmnd *scmd)
821 static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
823 struct ata_port *ap = qc->ap;
824 struct scsi_cmnd *scmd = qc->scsicmd;
827 spin_lock_irqsave(&ap->host_set->lock, flags);
828 qc->scsidone = ata_eh_scsidone;
829 __ata_qc_complete(qc);
830 WARN_ON(ata_tag_valid(qc->tag));
831 spin_unlock_irqrestore(&ap->host_set->lock, flags);
833 scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
837 * ata_eh_qc_complete - Complete an active ATA command from EH
838 * @qc: Command to complete
840 * Indicate to the mid and upper layers that an ATA command has
841 * completed. To be used from EH.
843 void ata_eh_qc_complete(struct ata_queued_cmd *qc)
845 struct scsi_cmnd *scmd = qc->scsicmd;
846 scmd->retries = scmd->allowed;
847 __ata_eh_qc_complete(qc);
851 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
852 * @qc: Command to retry
854 * Indicate to the mid and upper layers that an ATA command
855 * should be retried. To be used from EH.
857 * SCSI midlayer limits the number of retries to scmd->allowed.
858 * This function might need to adjust scmd->retries for commands
859 * which get retried due to unrelated NCQ failures.
861 void ata_eh_qc_retry(struct ata_queued_cmd *qc)
863 __ata_eh_qc_complete(qc);
867 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
868 * @qc: Storage for translated ATA taskfile
869 * @scsicmd: SCSI command to translate
871 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
872 * (to start). Perhaps these commands should be preceded by
873 * CHECK POWER MODE to see what power mode the device is already in.
874 * [See SAT revision 5 at www.t10.org]
877 * spin_lock_irqsave(host_set lock)
880 * Zero on success, non-zero on error.
883 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
886 struct ata_taskfile *tf = &qc->tf;
888 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
889 tf->protocol = ATA_PROT_NODATA;
890 if (scsicmd[1] & 0x1) {
891 ; /* ignore IMMED bit, violates sat-r05 */
893 if (scsicmd[4] & 0x2)
894 goto invalid_fld; /* LOEJ bit set not supported */
895 if (((scsicmd[4] >> 4) & 0xf) != 0)
896 goto invalid_fld; /* power conditions not supported */
897 if (scsicmd[4] & 0x1) {
898 tf->nsect = 1; /* 1 sector, lba=0 */
900 if (qc->dev->flags & ATA_DFLAG_LBA) {
901 qc->tf.flags |= ATA_TFLAG_LBA;
906 tf->device |= ATA_LBA;
909 tf->lbal = 0x1; /* sect */
910 tf->lbam = 0x0; /* cyl low */
911 tf->lbah = 0x0; /* cyl high */
914 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
916 tf->nsect = 0; /* time period value (0 implies now) */
917 tf->command = ATA_CMD_STANDBY;
918 /* Consider: ATA STANDBY IMMEDIATE command */
921 * Standby and Idle condition timers could be implemented but that
922 * would require libata to implement the Power condition mode page
923 * and allow the user to change it. Changing mode pages requires
924 * MODE SELECT to be implemented.
930 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
931 /* "Invalid field in cbd" */
937 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
938 * @qc: Storage for translated ATA taskfile
939 * @scsicmd: SCSI command to translate (ignored)
941 * Sets up an ATA taskfile to issue FLUSH CACHE or
945 * spin_lock_irqsave(host_set lock)
948 * Zero on success, non-zero on error.
951 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
953 struct ata_taskfile *tf = &qc->tf;
955 tf->flags |= ATA_TFLAG_DEVICE;
956 tf->protocol = ATA_PROT_NODATA;
958 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
959 (ata_id_has_flush_ext(qc->dev->id)))
960 tf->command = ATA_CMD_FLUSH_EXT;
962 tf->command = ATA_CMD_FLUSH;
968 * scsi_6_lba_len - Get LBA and transfer length
969 * @scsicmd: SCSI command to translate
971 * Calculate LBA and transfer length for 6-byte commands.
975 * @plen: the transfer length
978 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
983 VPRINTK("six-byte command\n");
985 lba |= ((u64)scsicmd[2]) << 8;
986 lba |= ((u64)scsicmd[3]);
988 len |= ((u32)scsicmd[4]);
995 * scsi_10_lba_len - Get LBA and transfer length
996 * @scsicmd: SCSI command to translate
998 * Calculate LBA and transfer length for 10-byte commands.
1002 * @plen: the transfer length
1005 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1010 VPRINTK("ten-byte command\n");
1012 lba |= ((u64)scsicmd[2]) << 24;
1013 lba |= ((u64)scsicmd[3]) << 16;
1014 lba |= ((u64)scsicmd[4]) << 8;
1015 lba |= ((u64)scsicmd[5]);
1017 len |= ((u32)scsicmd[7]) << 8;
1018 len |= ((u32)scsicmd[8]);
1025 * scsi_16_lba_len - Get LBA and transfer length
1026 * @scsicmd: SCSI command to translate
1028 * Calculate LBA and transfer length for 16-byte commands.
1032 * @plen: the transfer length
1035 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1040 VPRINTK("sixteen-byte command\n");
1042 lba |= ((u64)scsicmd[2]) << 56;
1043 lba |= ((u64)scsicmd[3]) << 48;
1044 lba |= ((u64)scsicmd[4]) << 40;
1045 lba |= ((u64)scsicmd[5]) << 32;
1046 lba |= ((u64)scsicmd[6]) << 24;
1047 lba |= ((u64)scsicmd[7]) << 16;
1048 lba |= ((u64)scsicmd[8]) << 8;
1049 lba |= ((u64)scsicmd[9]);
1051 len |= ((u32)scsicmd[10]) << 24;
1052 len |= ((u32)scsicmd[11]) << 16;
1053 len |= ((u32)scsicmd[12]) << 8;
1054 len |= ((u32)scsicmd[13]);
1061 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1062 * @qc: Storage for translated ATA taskfile
1063 * @scsicmd: SCSI command to translate
1065 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1068 * spin_lock_irqsave(host_set lock)
1071 * Zero on success, non-zero on error.
1074 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1076 struct ata_taskfile *tf = &qc->tf;
1077 struct ata_device *dev = qc->dev;
1078 u64 dev_sectors = qc->dev->n_sectors;
1082 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1083 tf->protocol = ATA_PROT_NODATA;
1085 if (scsicmd[0] == VERIFY)
1086 scsi_10_lba_len(scsicmd, &block, &n_block);
1087 else if (scsicmd[0] == VERIFY_16)
1088 scsi_16_lba_len(scsicmd, &block, &n_block);
1094 if (block >= dev_sectors)
1096 if ((block + n_block) > dev_sectors)
1099 if (dev->flags & ATA_DFLAG_LBA) {
1100 tf->flags |= ATA_TFLAG_LBA;
1102 if (lba_28_ok(block, n_block)) {
1104 tf->command = ATA_CMD_VERIFY;
1105 tf->device |= (block >> 24) & 0xf;
1106 } else if (lba_48_ok(block, n_block)) {
1107 if (!(dev->flags & ATA_DFLAG_LBA48))
1111 tf->flags |= ATA_TFLAG_LBA48;
1112 tf->command = ATA_CMD_VERIFY_EXT;
1114 tf->hob_nsect = (n_block >> 8) & 0xff;
1116 tf->hob_lbah = (block >> 40) & 0xff;
1117 tf->hob_lbam = (block >> 32) & 0xff;
1118 tf->hob_lbal = (block >> 24) & 0xff;
1120 /* request too large even for LBA48 */
1123 tf->nsect = n_block & 0xff;
1125 tf->lbah = (block >> 16) & 0xff;
1126 tf->lbam = (block >> 8) & 0xff;
1127 tf->lbal = block & 0xff;
1129 tf->device |= ATA_LBA;
1132 u32 sect, head, cyl, track;
1134 if (!lba_28_ok(block, n_block))
1137 /* Convert LBA to CHS */
1138 track = (u32)block / dev->sectors;
1139 cyl = track / dev->heads;
1140 head = track % dev->heads;
1141 sect = (u32)block % dev->sectors + 1;
1143 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1144 (u32)block, track, cyl, head, sect);
1146 /* Check whether the converted CHS can fit.
1150 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1153 tf->command = ATA_CMD_VERIFY;
1154 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1157 tf->lbah = cyl >> 8;
1164 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1165 /* "Invalid field in cbd" */
1169 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1170 /* "Logical Block Address out of range" */
1174 qc->scsicmd->result = SAM_STAT_GOOD;
1179 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1180 * @qc: Storage for translated ATA taskfile
1181 * @scsicmd: SCSI command to translate
1183 * Converts any of six SCSI read/write commands into the
1184 * ATA counterpart, including starting sector (LBA),
1185 * sector count, and taking into account the device's LBA48
1188 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1189 * %WRITE_16 are currently supported.
1192 * spin_lock_irqsave(host_set lock)
1195 * Zero on success, non-zero on error.
1198 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1200 struct ata_taskfile *tf = &qc->tf;
1201 struct ata_device *dev = qc->dev;
1205 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1207 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1208 scsicmd[0] == WRITE_16)
1209 tf->flags |= ATA_TFLAG_WRITE;
1211 /* Calculate the SCSI LBA, transfer length and FUA. */
1212 switch (scsicmd[0]) {
1215 scsi_10_lba_len(scsicmd, &block, &n_block);
1216 if (unlikely(scsicmd[1] & (1 << 3)))
1217 tf->flags |= ATA_TFLAG_FUA;
1221 scsi_6_lba_len(scsicmd, &block, &n_block);
1223 /* for 6-byte r/w commands, transfer length 0
1224 * means 256 blocks of data, not 0 block.
1231 scsi_16_lba_len(scsicmd, &block, &n_block);
1232 if (unlikely(scsicmd[1] & (1 << 3)))
1233 tf->flags |= ATA_TFLAG_FUA;
1236 DPRINTK("no-byte command\n");
1240 /* Check and compose ATA command */
1242 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1243 * length 0 means transfer 0 block of data.
1244 * However, for ATA R/W commands, sector count 0 means
1245 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1247 * WARNING: one or two older ATA drives treat 0 as 0...
1251 if (dev->flags & ATA_DFLAG_LBA) {
1252 tf->flags |= ATA_TFLAG_LBA;
1254 if (lba_28_ok(block, n_block)) {
1256 tf->device |= (block >> 24) & 0xf;
1257 } else if (lba_48_ok(block, n_block)) {
1258 if (!(dev->flags & ATA_DFLAG_LBA48))
1262 tf->flags |= ATA_TFLAG_LBA48;
1264 tf->hob_nsect = (n_block >> 8) & 0xff;
1266 tf->hob_lbah = (block >> 40) & 0xff;
1267 tf->hob_lbam = (block >> 32) & 0xff;
1268 tf->hob_lbal = (block >> 24) & 0xff;
1270 /* request too large even for LBA48 */
1273 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1276 qc->nsect = n_block;
1277 tf->nsect = n_block & 0xff;
1279 tf->lbah = (block >> 16) & 0xff;
1280 tf->lbam = (block >> 8) & 0xff;
1281 tf->lbal = block & 0xff;
1283 tf->device |= ATA_LBA;
1286 u32 sect, head, cyl, track;
1288 /* The request -may- be too large for CHS addressing. */
1289 if (!lba_28_ok(block, n_block))
1292 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1295 /* Convert LBA to CHS */
1296 track = (u32)block / dev->sectors;
1297 cyl = track / dev->heads;
1298 head = track % dev->heads;
1299 sect = (u32)block % dev->sectors + 1;
1301 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1302 (u32)block, track, cyl, head, sect);
1304 /* Check whether the converted CHS can fit.
1308 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1311 qc->nsect = n_block;
1312 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1315 tf->lbah = cyl >> 8;
1322 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1323 /* "Invalid field in cbd" */
1327 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1328 /* "Logical Block Address out of range" */
1332 qc->scsicmd->result = SAM_STAT_GOOD;
1336 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1338 struct scsi_cmnd *cmd = qc->scsicmd;
1339 u8 *cdb = cmd->cmnd;
1340 int need_sense = (qc->err_mask != 0);
1342 /* For ATA pass thru (SAT) commands, generate a sense block if
1343 * user mandated it or if there's an error. Note that if we
1344 * generate because the user forced us to, a check condition
1345 * is generated and the ATA register values are returned
1346 * whether the command completed successfully or not. If there
1347 * was no error, SK, ASC and ASCQ will all be zero.
1349 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1350 ((cdb[2] & 0x20) || need_sense)) {
1351 ata_gen_ata_desc_sense(qc);
1354 cmd->result = SAM_STAT_GOOD;
1356 /* TODO: decide which descriptor format to use
1357 * for 48b LBA devices and call that here
1358 * instead of the fixed desc, which is only
1359 * good for smaller LBA (and maybe CHS?)
1362 ata_gen_fixed_sense(qc);
1367 /* The ata_gen_..._sense routines fill in tf */
1368 ata_dump_status(qc->ap->id, &qc->tf);
1377 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1378 * @ap: ATA port to which the command is addressed
1379 * @dev: ATA device to which the command is addressed
1380 * @cmd: SCSI command to execute
1381 * @done: SCSI command completion function
1382 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1384 * Our ->queuecommand() function has decided that the SCSI
1385 * command issued can be directly translated into an ATA
1386 * command, rather than handled internally.
1388 * This function sets up an ata_queued_cmd structure for the
1389 * SCSI command, and sends that ata_queued_cmd to the hardware.
1391 * The xlat_func argument (actor) returns 0 if ready to execute
1392 * ATA command, else 1 to finish translation. If 1 is returned
1393 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1394 * to be set reflecting an error condition or clean (early)
1398 * spin_lock_irqsave(host_set lock)
1401 static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
1402 struct scsi_cmnd *cmd,
1403 void (*done)(struct scsi_cmnd *),
1404 ata_xlat_func_t xlat_func)
1406 struct ata_queued_cmd *qc;
1407 u8 *scsicmd = cmd->cmnd;
1411 qc = ata_scsi_qc_new(ap, dev, cmd, done);
1415 /* data is present; dma-map it */
1416 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1417 cmd->sc_data_direction == DMA_TO_DEVICE) {
1418 if (unlikely(cmd->request_bufflen < 1)) {
1419 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
1420 ap->id, dev->devno);
1425 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1427 ata_sg_init_one(qc, cmd->request_buffer,
1428 cmd->request_bufflen);
1430 qc->dma_dir = cmd->sc_data_direction;
1433 qc->complete_fn = ata_scsi_qc_complete;
1435 if (xlat_func(qc, scsicmd))
1438 /* select device, send command to hardware */
1439 qc->err_mask = ata_qc_issue(qc);
1441 ata_qc_complete(qc);
1449 DPRINTK("EXIT - early finish (good or error)\n");
1455 cmd->result = (DID_ERROR << 16);
1457 DPRINTK("EXIT - internal\n");
1462 * ata_scsi_rbuf_get - Map response buffer.
1463 * @cmd: SCSI command containing buffer to be mapped.
1464 * @buf_out: Pointer to mapped area.
1466 * Maps buffer contained within SCSI command @cmd.
1469 * spin_lock_irqsave(host_set lock)
1472 * Length of response buffer.
1475 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1478 unsigned int buflen;
1481 struct scatterlist *sg;
1483 sg = (struct scatterlist *) cmd->request_buffer;
1484 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1485 buflen = sg->length;
1487 buf = cmd->request_buffer;
1488 buflen = cmd->request_bufflen;
1496 * ata_scsi_rbuf_put - Unmap response buffer.
1497 * @cmd: SCSI command containing buffer to be unmapped.
1498 * @buf: buffer to unmap
1500 * Unmaps response buffer contained within @cmd.
1503 * spin_lock_irqsave(host_set lock)
1506 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1509 struct scatterlist *sg;
1511 sg = (struct scatterlist *) cmd->request_buffer;
1512 kunmap_atomic(buf - sg->offset, KM_USER0);
1517 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1518 * @args: device IDENTIFY data / SCSI command of interest.
1519 * @actor: Callback hook for desired SCSI command simulator
1521 * Takes care of the hard work of simulating a SCSI command...
1522 * Mapping the response buffer, calling the command's handler,
1523 * and handling the handler's return value. This return value
1524 * indicates whether the handler wishes the SCSI command to be
1525 * completed successfully (0), or not (in which case cmd->result
1526 * and sense buffer are assumed to be set).
1529 * spin_lock_irqsave(host_set lock)
1532 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1533 unsigned int (*actor) (struct ata_scsi_args *args,
1534 u8 *rbuf, unsigned int buflen))
1537 unsigned int buflen, rc;
1538 struct scsi_cmnd *cmd = args->cmd;
1540 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1541 memset(rbuf, 0, buflen);
1542 rc = actor(args, rbuf, buflen);
1543 ata_scsi_rbuf_put(cmd, rbuf);
1546 cmd->result = SAM_STAT_GOOD;
1551 * ata_scsiop_inq_std - Simulate INQUIRY command
1552 * @args: device IDENTIFY data / SCSI command of interest.
1553 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1554 * @buflen: Response buffer length.
1556 * Returns standard device identification data associated
1557 * with non-VPD INQUIRY command output.
1560 * spin_lock_irqsave(host_set lock)
1563 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1564 unsigned int buflen)
1569 0x5, /* claim SPC-3 version compatibility */
1574 /* set scsi removeable (RMB) bit per ata bit */
1575 if (ata_id_removeable(args->id))
1580 memcpy(rbuf, hdr, sizeof(hdr));
1583 memcpy(&rbuf[8], "ATA ", 8);
1584 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1585 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1586 if (rbuf[32] == 0 || rbuf[32] == ' ')
1587 memcpy(&rbuf[32], "n/a ", 4);
1591 const u8 versions[] = {
1592 0x60, /* SAM-3 (no version claimed) */
1595 0x20, /* SBC-2 (no version claimed) */
1598 0x60 /* SPC-3 (no version claimed) */
1601 memcpy(rbuf + 59, versions, sizeof(versions));
1608 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1609 * @args: device IDENTIFY data / SCSI command of interest.
1610 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1611 * @buflen: Response buffer length.
1613 * Returns list of inquiry VPD pages available.
1616 * spin_lock_irqsave(host_set lock)
1619 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1620 unsigned int buflen)
1622 const u8 pages[] = {
1623 0x00, /* page 0x00, this page */
1624 0x80, /* page 0x80, unit serial no page */
1625 0x83 /* page 0x83, device ident page */
1627 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1630 memcpy(rbuf + 4, pages, sizeof(pages));
1636 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1637 * @args: device IDENTIFY data / SCSI command of interest.
1638 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1639 * @buflen: Response buffer length.
1641 * Returns ATA device serial number.
1644 * spin_lock_irqsave(host_set lock)
1647 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1648 unsigned int buflen)
1652 0x80, /* this page code */
1654 ATA_SERNO_LEN, /* page len */
1656 memcpy(rbuf, hdr, sizeof(hdr));
1658 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1659 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1660 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1666 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1667 * @args: device IDENTIFY data / SCSI command of interest.
1668 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1669 * @buflen: Response buffer length.
1671 * Yields two logical unit device identification designators:
1672 * - vendor specific ASCII containing the ATA serial number
1673 * - SAT defined "t10 vendor id based" containing ASCII vendor
1674 * name ("ATA "), model and serial numbers.
1677 * spin_lock_irqsave(host_set lock)
1680 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1681 unsigned int buflen)
1684 const int sat_model_serial_desc_len = 68;
1685 const int ata_model_byte_len = 40;
1687 rbuf[1] = 0x83; /* this page code */
1690 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1691 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1693 rbuf[num + 3] = ATA_SERNO_LEN;
1695 ata_id_string(args->id, (unsigned char *) rbuf + num,
1696 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1697 num += ATA_SERNO_LEN;
1699 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1700 /* SAT defined lu model and serial numbers descriptor */
1701 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1704 rbuf[num + 3] = sat_model_serial_desc_len;
1706 memcpy(rbuf + num, "ATA ", 8);
1708 ata_id_string(args->id, (unsigned char *) rbuf + num,
1709 ATA_ID_PROD_OFS, ata_model_byte_len);
1710 num += ata_model_byte_len;
1711 ata_id_string(args->id, (unsigned char *) rbuf + num,
1712 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1713 num += ATA_SERNO_LEN;
1715 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1720 * ata_scsiop_noop - Command handler that simply returns success.
1721 * @args: device IDENTIFY data / SCSI command of interest.
1722 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1723 * @buflen: Response buffer length.
1725 * No operation. Simply returns success to caller, to indicate
1726 * that the caller should successfully complete this SCSI command.
1729 * spin_lock_irqsave(host_set lock)
1732 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1733 unsigned int buflen)
1740 * ata_msense_push - Push data onto MODE SENSE data output buffer
1741 * @ptr_io: (input/output) Location to store more output data
1742 * @last: End of output data buffer
1743 * @buf: Pointer to BLOB being added to output buffer
1744 * @buflen: Length of BLOB
1746 * Store MODE SENSE data on an output buffer.
1752 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1753 const u8 *buf, unsigned int buflen)
1757 if ((ptr + buflen - 1) > last)
1760 memcpy(ptr, buf, buflen);
1768 * ata_msense_caching - Simulate MODE SENSE caching info page
1769 * @id: device IDENTIFY data
1770 * @ptr_io: (input/output) Location to store more output data
1771 * @last: End of output data buffer
1773 * Generate a caching info page, which conditionally indicates
1774 * write caching to the SCSI layer, depending on device
1781 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1784 u8 page[CACHE_MPAGE_LEN];
1786 memcpy(page, def_cache_mpage, sizeof(page));
1787 if (ata_id_wcache_enabled(id))
1788 page[2] |= (1 << 2); /* write cache enable */
1789 if (!ata_id_rahead_enabled(id))
1790 page[12] |= (1 << 5); /* disable read ahead */
1792 ata_msense_push(ptr_io, last, page, sizeof(page));
1793 return sizeof(page);
1797 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1798 * @dev: Device associated with this MODE SENSE command
1799 * @ptr_io: (input/output) Location to store more output data
1800 * @last: End of output data buffer
1802 * Generate a generic MODE SENSE control mode page.
1808 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1810 ata_msense_push(ptr_io, last, def_control_mpage,
1811 sizeof(def_control_mpage));
1812 return sizeof(def_control_mpage);
1816 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1817 * @dev: Device associated with this MODE SENSE command
1818 * @ptr_io: (input/output) Location to store more output data
1819 * @last: End of output data buffer
1821 * Generate a generic MODE SENSE r/w error recovery page.
1827 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1830 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1831 sizeof(def_rw_recovery_mpage));
1832 return sizeof(def_rw_recovery_mpage);
1836 * We can turn this into a real blacklist if it's needed, for now just
1837 * blacklist any Maxtor BANC1G10 revision firmware
1839 static int ata_dev_supports_fua(u16 *id)
1841 unsigned char model[41], fw[9];
1845 if (!ata_id_has_fua(id))
1848 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1849 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
1851 if (strcmp(model, "Maxtor"))
1853 if (strcmp(fw, "BANC1G10"))
1856 return 0; /* blacklisted */
1860 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1861 * @args: device IDENTIFY data / SCSI command of interest.
1862 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1863 * @buflen: Response buffer length.
1865 * Simulate MODE SENSE commands. Assume this is invoked for direct
1866 * access devices (e.g. disks) only. There should be no block
1867 * descriptor for other device types.
1870 * spin_lock_irqsave(host_set lock)
1873 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1874 unsigned int buflen)
1876 struct ata_device *dev = args->dev;
1877 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1878 const u8 sat_blk_desc[] = {
1879 0, 0, 0, 0, /* number of blocks: sat unspecified */
1881 0, 0x2, 0x0 /* block length: 512 bytes */
1884 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1889 six_byte = (scsicmd[0] == MODE_SENSE);
1890 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1892 * LLBA bit in msense(10) ignored (compliant)
1895 page_control = scsicmd[2] >> 6;
1896 switch (page_control) {
1897 case 0: /* current */
1898 break; /* supported */
1900 goto saving_not_supp;
1901 case 1: /* changeable */
1902 case 2: /* defaults */
1908 output_len = 4 + (ebd ? 8 : 0);
1909 alloc_len = scsicmd[4];
1911 output_len = 8 + (ebd ? 8 : 0);
1912 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1914 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1916 p = rbuf + output_len;
1917 last = rbuf + minlen - 1;
1919 pg = scsicmd[2] & 0x3f;
1922 * No mode subpages supported (yet) but asking for _all_
1923 * subpages may be valid
1925 if (spg && (spg != ALL_SUB_MPAGES))
1929 case RW_RECOVERY_MPAGE:
1930 output_len += ata_msense_rw_recovery(&p, last);
1934 output_len += ata_msense_caching(args->id, &p, last);
1937 case CONTROL_MPAGE: {
1938 output_len += ata_msense_ctl_mode(&p, last);
1943 output_len += ata_msense_rw_recovery(&p, last);
1944 output_len += ata_msense_caching(args->id, &p, last);
1945 output_len += ata_msense_ctl_mode(&p, last);
1948 default: /* invalid page code */
1956 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
1957 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1962 rbuf[0] = output_len;
1967 rbuf[3] = sizeof(sat_blk_desc);
1969 memcpy(rbuf + 4, sat_blk_desc,
1970 sizeof(sat_blk_desc));
1974 rbuf[0] = output_len >> 8;
1976 rbuf[1] = output_len;
1981 rbuf[7] = sizeof(sat_blk_desc);
1983 memcpy(rbuf + 8, sat_blk_desc,
1984 sizeof(sat_blk_desc));
1990 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1991 /* "Invalid field in cbd" */
1995 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1996 /* "Saving parameters not supported" */
2001 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2002 * @args: device IDENTIFY data / SCSI command of interest.
2003 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2004 * @buflen: Response buffer length.
2006 * Simulate READ CAPACITY commands.
2009 * spin_lock_irqsave(host_set lock)
2012 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2013 unsigned int buflen)
2020 if (ata_id_has_lba(args->id)) {
2021 if (ata_id_has_lba48(args->id))
2022 n_sectors = ata_id_u64(args->id, 100);
2024 n_sectors = ata_id_u32(args->id, 60);
2026 /* CHS default translation */
2027 n_sectors = args->id[1] * args->id[3] * args->id[6];
2029 if (ata_id_current_chs_valid(args->id))
2030 /* CHS current translation */
2031 n_sectors = ata_id_u32(args->id, 57);
2034 n_sectors--; /* ATA TotalUserSectors - 1 */
2036 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2037 if( n_sectors >= 0xffffffffULL )
2038 tmp = 0xffffffff ; /* Return max count on overflow */
2042 /* sector count, 32-bit */
2043 rbuf[0] = tmp >> (8 * 3);
2044 rbuf[1] = tmp >> (8 * 2);
2045 rbuf[2] = tmp >> (8 * 1);
2049 tmp = ATA_SECT_SIZE;
2054 /* sector count, 64-bit */
2055 tmp = n_sectors >> (8 * 4);
2056 rbuf[2] = tmp >> (8 * 3);
2057 rbuf[3] = tmp >> (8 * 2);
2058 rbuf[4] = tmp >> (8 * 1);
2061 rbuf[6] = tmp >> (8 * 3);
2062 rbuf[7] = tmp >> (8 * 2);
2063 rbuf[8] = tmp >> (8 * 1);
2067 tmp = ATA_SECT_SIZE;
2068 rbuf[12] = tmp >> 8;
2076 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2077 * @args: device IDENTIFY data / SCSI command of interest.
2078 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2079 * @buflen: Response buffer length.
2081 * Simulate REPORT LUNS command.
2084 * spin_lock_irqsave(host_set lock)
2087 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2088 unsigned int buflen)
2091 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2097 * ata_scsi_set_sense - Set SCSI sense data and status
2098 * @cmd: SCSI request to be handled
2099 * @sk: SCSI-defined sense key
2100 * @asc: SCSI-defined additional sense code
2101 * @ascq: SCSI-defined additional sense code qualifier
2103 * Helper function that builds a valid fixed format, current
2104 * response code and the given sense key (sk), additional sense
2105 * code (asc) and additional sense code qualifier (ascq) with
2106 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2107 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2113 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2115 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2117 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2118 cmd->sense_buffer[2] = sk;
2119 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2120 cmd->sense_buffer[12] = asc;
2121 cmd->sense_buffer[13] = ascq;
2125 * ata_scsi_badcmd - End a SCSI request with an error
2126 * @cmd: SCSI request to be handled
2127 * @done: SCSI command completion function
2128 * @asc: SCSI-defined additional sense code
2129 * @ascq: SCSI-defined additional sense code qualifier
2131 * Helper function that completes a SCSI command with
2132 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2133 * and the specified additional sense codes.
2136 * spin_lock_irqsave(host_set lock)
2139 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2142 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2147 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2149 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
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);
2157 qc->scsidone(qc->scsicmd);
2161 /* is it pointless to prefer PIO for "safety reasons"? */
2162 static inline int ata_pio_use_silly(struct ata_port *ap)
2164 return (ap->flags & ATA_FLAG_PIO_DMA);
2167 static void atapi_request_sense(struct ata_queued_cmd *qc)
2169 struct ata_port *ap = qc->ap;
2170 struct scsi_cmnd *cmd = qc->scsicmd;
2172 DPRINTK("ATAPI request sense\n");
2174 /* FIXME: is this needed? */
2175 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2177 ap->ops->tf_read(ap, &qc->tf);
2179 /* fill these in, for the case where they are -not- overwritten */
2180 cmd->sense_buffer[0] = 0x70;
2181 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2185 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2186 qc->dma_dir = DMA_FROM_DEVICE;
2188 memset(&qc->cdb, 0, qc->dev->cdb_len);
2189 qc->cdb[0] = REQUEST_SENSE;
2190 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2192 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2193 qc->tf.command = ATA_CMD_PACKET;
2195 if (ata_pio_use_silly(ap)) {
2196 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2197 qc->tf.feature |= ATAPI_PKT_DMA;
2199 qc->tf.protocol = ATA_PROT_ATAPI;
2200 qc->tf.lbam = (8 * 1024) & 0xff;
2201 qc->tf.lbah = (8 * 1024) >> 8;
2203 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2205 qc->complete_fn = atapi_sense_complete;
2207 qc->err_mask = ata_qc_issue(qc);
2209 ata_qc_complete(qc);
2214 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2216 struct scsi_cmnd *cmd = qc->scsicmd;
2217 unsigned int err_mask = qc->err_mask;
2219 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2221 if (unlikely(err_mask & AC_ERR_DEV)) {
2222 cmd->result = SAM_STAT_CHECK_CONDITION;
2223 atapi_request_sense(qc);
2227 else if (unlikely(err_mask))
2228 /* FIXME: not quite right; we don't want the
2229 * translation of taskfile registers into
2230 * a sense descriptors, since that's only
2231 * correct for ATA, not ATAPI
2233 ata_gen_ata_desc_sense(qc);
2236 u8 *scsicmd = cmd->cmnd;
2238 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2240 unsigned int buflen;
2242 buflen = ata_scsi_rbuf_get(cmd, &buf);
2244 /* ATAPI devices typically report zero for their SCSI version,
2245 * and sometimes deviate from the spec WRT response data
2246 * format. If SCSI version is reported as zero like normal,
2247 * then we make the following fixups: 1) Fake MMC-5 version,
2248 * to indicate to the Linux scsi midlayer this is a modern
2249 * device. 2) Ensure response data format / ATAPI information
2250 * are always correct.
2257 ata_scsi_rbuf_put(cmd, buf);
2260 cmd->result = SAM_STAT_GOOD;
2267 * atapi_xlat - Initialize PACKET taskfile
2268 * @qc: command structure to be initialized
2269 * @scsicmd: SCSI CDB associated with this PACKET command
2272 * spin_lock_irqsave(host_set lock)
2275 * Zero on success, non-zero on failure.
2278 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2280 struct scsi_cmnd *cmd = qc->scsicmd;
2281 struct ata_device *dev = qc->dev;
2282 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2283 int nodata = (cmd->sc_data_direction == DMA_NONE);
2286 /* Check whether ATAPI DMA is safe */
2287 if (ata_check_atapi_dma(qc))
2290 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
2292 qc->complete_fn = atapi_qc_complete;
2294 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2295 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2296 qc->tf.flags |= ATA_TFLAG_WRITE;
2297 DPRINTK("direction: write\n");
2300 qc->tf.command = ATA_CMD_PACKET;
2302 /* no data, or PIO data xfer */
2303 if (using_pio || nodata) {
2305 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2307 qc->tf.protocol = ATA_PROT_ATAPI;
2308 qc->tf.lbam = (8 * 1024) & 0xff;
2309 qc->tf.lbah = (8 * 1024) >> 8;
2314 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2315 qc->tf.feature |= ATAPI_PKT_DMA;
2317 #ifdef ATAPI_ENABLE_DMADIR
2318 /* some SATA bridges need us to indicate data xfer direction */
2319 if (cmd->sc_data_direction != DMA_TO_DEVICE)
2320 qc->tf.feature |= ATAPI_DMADIR;
2324 qc->nbytes = cmd->bufflen;
2330 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2331 * @ap: ATA port to which the device is attached
2332 * @scsidev: SCSI device from which we derive the ATA device
2334 * Given various information provided in struct scsi_cmnd,
2335 * map that onto an ATA bus, and using that mapping
2336 * determine which ata_device is associated with the
2337 * SCSI command to be sent.
2340 * spin_lock_irqsave(host_set lock)
2343 * Associated ATA device, or %NULL if not found.
2346 static struct ata_device *
2347 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2349 struct ata_device *dev;
2351 /* skip commands not addressed to targets we simulate */
2352 if (likely(scsidev->id < ATA_MAX_DEVICES))
2353 dev = &ap->device[scsidev->id];
2357 if (unlikely((scsidev->channel != 0) ||
2358 (scsidev->lun != 0)))
2361 if (unlikely(!ata_dev_present(dev)))
2364 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2365 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2366 printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2367 ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
2376 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2377 * @byte1: Byte 1 from pass-thru CDB.
2380 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2383 ata_scsi_map_proto(u8 byte1)
2385 switch((byte1 & 0x1e) >> 1) {
2386 case 3: /* Non-data */
2387 return ATA_PROT_NODATA;
2390 return ATA_PROT_DMA;
2392 case 4: /* PIO Data-in */
2393 case 5: /* PIO Data-out */
2394 return ATA_PROT_PIO;
2396 case 10: /* Device Reset */
2397 case 0: /* Hard Reset */
2399 case 2: /* Bus Idle */
2400 case 7: /* Packet */
2401 case 8: /* DMA Queued */
2402 case 9: /* Device Diagnostic */
2403 case 11: /* UDMA Data-in */
2404 case 12: /* UDMA Data-Out */
2405 case 13: /* FPDMA */
2406 default: /* Reserved */
2410 return ATA_PROT_UNKNOWN;
2414 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2415 * @qc: command structure to be initialized
2416 * @scsicmd: SCSI command to convert
2418 * Handles either 12 or 16-byte versions of the CDB.
2421 * Zero on success, non-zero on failure.
2424 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2426 struct ata_taskfile *tf = &(qc->tf);
2427 struct scsi_cmnd *cmd = qc->scsicmd;
2429 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2432 if (scsicmd[1] & 0xe0)
2433 /* PIO multi not supported yet */
2437 * 12 and 16 byte CDBs use different offsets to
2438 * provide the various register values.
2440 if (scsicmd[0] == ATA_16) {
2442 * 16-byte CDB - may contain extended commands.
2444 * If that is the case, copy the upper byte register values.
2446 if (scsicmd[1] & 0x01) {
2447 tf->hob_feature = scsicmd[3];
2448 tf->hob_nsect = scsicmd[5];
2449 tf->hob_lbal = scsicmd[7];
2450 tf->hob_lbam = scsicmd[9];
2451 tf->hob_lbah = scsicmd[11];
2452 tf->flags |= ATA_TFLAG_LBA48;
2454 tf->flags &= ~ATA_TFLAG_LBA48;
2457 * Always copy low byte, device and command registers.
2459 tf->feature = scsicmd[4];
2460 tf->nsect = scsicmd[6];
2461 tf->lbal = scsicmd[8];
2462 tf->lbam = scsicmd[10];
2463 tf->lbah = scsicmd[12];
2464 tf->device = scsicmd[13];
2465 tf->command = scsicmd[14];
2468 * 12-byte CDB - incapable of extended commands.
2470 tf->flags &= ~ATA_TFLAG_LBA48;
2472 tf->feature = scsicmd[3];
2473 tf->nsect = scsicmd[4];
2474 tf->lbal = scsicmd[5];
2475 tf->lbam = scsicmd[6];
2476 tf->lbah = scsicmd[7];
2477 tf->device = scsicmd[8];
2478 tf->command = scsicmd[9];
2481 * If slave is possible, enforce correct master/slave bit
2483 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2484 tf->device = qc->dev->devno ?
2485 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2488 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2489 * SET_FEATURES - XFER MODE must be preceded/succeeded
2490 * by an update to hardware-specific registers for each
2491 * controller (i.e. the reason for ->set_piomode(),
2492 * ->set_dmamode(), and ->post_set_mode() hooks).
2494 if ((tf->command == ATA_CMD_SET_FEATURES)
2495 && (tf->feature == SETFEATURES_XFER))
2499 * Set flags so that all registers will be written,
2500 * and pass on write indication (used for PIO/DMA
2503 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2505 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2506 tf->flags |= ATA_TFLAG_WRITE;
2509 * Set transfer length.
2511 * TODO: find out if we need to do more here to
2512 * cover scatter/gather case.
2514 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2519 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2520 /* "Invalid field in cdb" */
2525 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2527 * @cmd: SCSI command opcode to consider
2529 * Look up the SCSI command given, and determine whether the
2530 * SCSI command is to be translated or simulated.
2533 * Pointer to translation function if possible, %NULL if not.
2536 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2546 return ata_scsi_rw_xlat;
2548 case SYNCHRONIZE_CACHE:
2549 if (ata_try_flush_cache(dev))
2550 return ata_scsi_flush_xlat;
2555 return ata_scsi_verify_xlat;
2559 return ata_scsi_pass_thru;
2562 return ata_scsi_start_stop_xlat;
2569 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2570 * @ap: ATA port to which the command was being sent
2571 * @cmd: SCSI command to dump
2573 * Prints the contents of a SCSI command via printk().
2576 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2577 struct scsi_cmnd *cmd)
2580 struct scsi_device *scsidev = cmd->device;
2581 u8 *scsicmd = cmd->cmnd;
2583 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2585 scsidev->channel, scsidev->id, scsidev->lun,
2586 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2587 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2593 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2594 * @cmd: SCSI command to be sent
2595 * @done: Completion function, called when command is complete
2597 * In some cases, this function translates SCSI commands into
2598 * ATA taskfiles, and queues the taskfiles to be sent to
2599 * hardware. In other cases, this function simulates a
2600 * SCSI device by evaluating and responding to certain
2601 * SCSI commands. This creates the overall effect of
2602 * ATA and ATAPI devices appearing as SCSI devices.
2605 * Releases scsi-layer-held lock, and obtains host_set lock.
2611 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2613 struct ata_port *ap;
2614 struct ata_device *dev;
2615 struct scsi_device *scsidev = cmd->device;
2616 struct Scsi_Host *shost = scsidev->host;
2618 ap = (struct ata_port *) &shost->hostdata[0];
2620 spin_unlock(shost->host_lock);
2621 spin_lock(&ap->host_set->lock);
2623 ata_scsi_dump_cdb(ap, cmd);
2625 dev = ata_scsi_find_dev(ap, scsidev);
2626 if (unlikely(!dev)) {
2627 cmd->result = (DID_BAD_TARGET << 16);
2632 if (dev->class == ATA_DEV_ATA) {
2633 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2637 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
2639 ata_scsi_simulate(ap, dev, cmd, done);
2641 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
2644 spin_unlock(&ap->host_set->lock);
2645 spin_lock(shost->host_lock);
2650 * ata_scsi_simulate - simulate SCSI command on ATA device
2651 * @ap: port the device is connected to
2652 * @dev: the target device
2653 * @cmd: SCSI command being sent to device.
2654 * @done: SCSI command completion function.
2656 * Interprets and directly executes a select list of SCSI commands
2657 * that can be handled internally.
2660 * spin_lock_irqsave(host_set lock)
2663 void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
2664 struct scsi_cmnd *cmd,
2665 void (*done)(struct scsi_cmnd *))
2667 struct ata_scsi_args args;
2668 const u8 *scsicmd = cmd->cmnd;
2676 switch(scsicmd[0]) {
2677 /* no-op's, complete with success */
2678 case SYNCHRONIZE_CACHE:
2682 case TEST_UNIT_READY:
2683 case FORMAT_UNIT: /* FIXME: correct? */
2684 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2685 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2689 if (scsicmd[1] & 2) /* is CmdDt set? */
2690 ata_scsi_invalid_field(cmd, done);
2691 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2692 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2693 else if (scsicmd[2] == 0x00)
2694 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2695 else if (scsicmd[2] == 0x80)
2696 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2697 else if (scsicmd[2] == 0x83)
2698 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2700 ata_scsi_invalid_field(cmd, done);
2705 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2708 case MODE_SELECT: /* unconditionally return */
2709 case MODE_SELECT_10: /* bad-field-in-cdb */
2710 ata_scsi_invalid_field(cmd, done);
2714 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2717 case SERVICE_ACTION_IN:
2718 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2719 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2721 ata_scsi_invalid_field(cmd, done);
2725 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2728 /* mandatory commands we haven't implemented yet */
2731 /* all other commands */
2733 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2734 /* "Invalid command operation code" */
2740 void ata_scsi_scan_host(struct ata_port *ap)
2742 struct ata_device *dev;
2745 if (ap->flags & ATA_FLAG_PORT_DISABLED)
2748 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2749 dev = &ap->device[i];
2751 if (ata_dev_present(dev))
2752 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);