2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage[] = {
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
81 0, /* write retry count */
85 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
94 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
107 struct scsi_transport_template ata_scsi_transport_template = {
108 .eh_strategy_handler = ata_scsi_error,
109 .eh_timed_out = ata_scsi_timed_out,
110 .user_scan = ata_scsi_user_scan,
114 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
135 * Defined by the SCSI layer. We don't really care.
140 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
145 sector_div(capacity, 255*63);
152 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
153 * @scsidev: Device to which we are issuing command
154 * @arg: User provided data for issuing command
157 * Defined by the SCSI layer. We don't really care.
160 * Zero on success, negative errno on error.
163 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
166 u8 scsi_cmd[MAX_COMMAND_SIZE];
167 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
169 enum dma_data_direction data_dir;
175 if (copy_from_user(args, arg, sizeof(args)))
178 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
182 memset(scsi_cmd, 0, sizeof(scsi_cmd));
185 argsize = SECTOR_SIZE * args[3];
186 argbuf = kmalloc(argsize, GFP_KERNEL);
187 if (argbuf == NULL) {
192 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
193 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
194 block count in sector count field */
195 data_dir = DMA_FROM_DEVICE;
197 scsi_cmd[1] = (3 << 1); /* Non-data */
198 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
202 scsi_cmd[0] = ATA_16;
204 scsi_cmd[4] = args[2];
205 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
206 scsi_cmd[6] = args[3];
207 scsi_cmd[8] = args[1];
211 scsi_cmd[6] = args[1];
213 scsi_cmd[14] = args[0];
215 /* Good values for timeout and retries? Values below
216 from scsi_ioctl_send_command() for default case... */
217 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
218 sensebuf, (10*HZ), 5, 0);
220 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
221 u8 *desc = sensebuf + 8;
222 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
224 /* If we set cc then ATA pass-through will cause a
225 * check condition even if no error. Filter that. */
226 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
227 struct scsi_sense_hdr sshdr;
228 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
230 if (sshdr.sense_key==0 &&
231 sshdr.asc==0 && sshdr.ascq==0)
232 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
235 /* Send userspace a few ATA registers (same as drivers/ide) */
236 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
237 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
238 args[0] = desc[13]; /* status */
239 args[1] = desc[3]; /* error */
240 args[2] = desc[5]; /* sector count (0:7) */
241 if (copy_to_user(arg, args, sizeof(args)))
253 && copy_to_user(arg + sizeof(args), argbuf, argsize))
262 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
263 * @scsidev: Device to which we are issuing command
264 * @arg: User provided data for issuing command
267 * Defined by the SCSI layer. We don't really care.
270 * Zero on success, negative errno on error.
272 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
275 u8 scsi_cmd[MAX_COMMAND_SIZE];
277 struct scsi_sense_hdr sshdr;
282 if (copy_from_user(args, arg, sizeof(args)))
285 memset(scsi_cmd, 0, sizeof(scsi_cmd));
286 scsi_cmd[0] = ATA_16;
287 scsi_cmd[1] = (3 << 1); /* Non-data */
288 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
289 scsi_cmd[4] = args[1];
290 scsi_cmd[6] = args[2];
291 scsi_cmd[8] = args[3];
292 scsi_cmd[10] = args[4];
293 scsi_cmd[12] = args[5];
294 scsi_cmd[14] = args[0];
296 /* Good values for timeout and retries? Values below
297 from scsi_ioctl_send_command() for default case... */
298 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
302 /* Need code to retrieve data from check condition? */
306 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
308 int val = -EINVAL, rc = -EINVAL;
311 case ATA_IOC_GET_IO32:
313 if (copy_to_user(arg, &val, 1))
317 case ATA_IOC_SET_IO32:
318 val = (unsigned long) arg;
324 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
326 return ata_cmd_ioctl(scsidev, arg);
328 case HDIO_DRIVE_TASK:
329 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
331 return ata_task_ioctl(scsidev, arg);
342 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
343 * @dev: ATA device to which the new command is attached
344 * @cmd: SCSI command that originated this ATA command
345 * @done: SCSI command completion function
347 * Obtain a reference to an unused ata_queued_cmd structure,
348 * which is the basic libata structure representing a single
349 * ATA command sent to the hardware.
351 * If a command was available, fill in the SCSI-specific
352 * portions of the structure with information on the
356 * spin_lock_irqsave(host lock)
359 * Command allocated, or %NULL if none available.
361 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
362 struct scsi_cmnd *cmd,
363 void (*done)(struct scsi_cmnd *))
365 struct ata_queued_cmd *qc;
367 qc = ata_qc_new_init(dev);
373 qc->__sg = (struct scatterlist *) cmd->request_buffer;
374 qc->n_elem = cmd->use_sg;
376 qc->__sg = &qc->sgent;
380 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
388 * ata_dump_status - user friendly display of error info
389 * @id: id of the port in question
390 * @tf: ptr to filled out taskfile
392 * Decode and dump the ATA error/status registers for the user so
393 * that they have some idea what really happened at the non
394 * make-believe layer.
397 * inherited from caller
399 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
401 u8 stat = tf->command, err = tf->feature;
403 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
404 if (stat & ATA_BUSY) {
405 printk("Busy }\n"); /* Data is not valid in this case */
407 if (stat & 0x40) printk("DriveReady ");
408 if (stat & 0x20) printk("DeviceFault ");
409 if (stat & 0x10) printk("SeekComplete ");
410 if (stat & 0x08) printk("DataRequest ");
411 if (stat & 0x04) printk("CorrectedError ");
412 if (stat & 0x02) printk("Index ");
413 if (stat & 0x01) printk("Error ");
417 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
418 if (err & 0x04) printk("DriveStatusError ");
420 if (err & 0x04) printk("BadCRC ");
421 else printk("Sector ");
423 if (err & 0x40) printk("UncorrectableError ");
424 if (err & 0x10) printk("SectorIdNotFound ");
425 if (err & 0x02) printk("TrackZeroNotFound ");
426 if (err & 0x01) printk("AddrMarkNotFound ");
433 * ata_scsi_device_suspend - suspend ATA device associated with sdev
434 * @sdev: the SCSI device to suspend
435 * @mesg: target power management message
437 * Request suspend EH action on the ATA device associated with
438 * @sdev and wait for the operation to complete.
441 * Kernel thread context (may sleep).
444 * 0 on success, -errno otherwise.
446 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
448 struct ata_port *ap = ata_shost_to_port(sdev->host);
449 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
457 spin_lock_irqsave(ap->lock, flags);
459 /* wait for the previous resume to complete */
460 while (dev->flags & ATA_DFLAG_SUSPENDED) {
461 spin_unlock_irqrestore(ap->lock, flags);
462 ata_port_wait_eh(ap);
463 spin_lock_irqsave(ap->lock, flags);
466 /* if @sdev is already detached, nothing to do */
467 if (sdev->sdev_state == SDEV_OFFLINE ||
468 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
471 /* request suspend */
472 action = ATA_EH_SUSPEND;
473 if (mesg.event != PM_EVENT_SUSPEND)
474 action |= ATA_EH_PM_FREEZE;
475 ap->eh_info.dev_action[dev->devno] |= action;
476 ap->eh_info.flags |= ATA_EHI_QUIET;
477 ata_port_schedule_eh(ap);
479 spin_unlock_irqrestore(ap->lock, flags);
481 /* wait for EH to do the job */
482 ata_port_wait_eh(ap);
484 spin_lock_irqsave(ap->lock, flags);
486 /* If @sdev is still attached but the associated ATA device
487 * isn't suspended, the operation failed.
489 if (sdev->sdev_state != SDEV_OFFLINE &&
490 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
491 !(dev->flags & ATA_DFLAG_SUSPENDED))
495 spin_unlock_irqrestore(ap->lock, flags);
498 sdev->sdev_gendev.power.power_state = mesg;
503 * ata_scsi_device_resume - resume ATA device associated with sdev
504 * @sdev: the SCSI device to resume
506 * Request resume EH action on the ATA device associated with
507 * @sdev and return immediately. This enables parallel
508 * wakeup/spinup of devices.
511 * Kernel thread context (may sleep).
516 int ata_scsi_device_resume(struct scsi_device *sdev)
518 struct ata_port *ap = ata_shost_to_port(sdev->host);
519 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
520 struct ata_eh_info *ehi = &ap->eh_info;
527 spin_lock_irqsave(ap->lock, flags);
529 /* if @sdev is already detached, nothing to do */
530 if (sdev->sdev_state == SDEV_OFFLINE ||
531 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
535 action = ATA_EH_RESUME;
536 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
537 __ata_ehi_hotplugged(ehi);
539 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
540 ehi->dev_action[dev->devno] |= action;
542 /* We don't want autopsy and verbose EH messages. Disable
543 * those if we're the only device on this link.
545 if (ata_port_max_devices(ap) == 1)
546 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
548 ata_port_schedule_eh(ap);
551 spin_unlock_irqrestore(ap->lock, flags);
553 sdev->sdev_gendev.power.power_state = PMSG_ON;
558 * ata_to_sense_error - convert ATA error to SCSI error
559 * @id: ATA device number
560 * @drv_stat: value contained in ATA status register
561 * @drv_err: value contained in ATA error register
562 * @sk: the sense key we'll fill out
563 * @asc: the additional sense code we'll fill out
564 * @ascq: the additional sense code qualifier we'll fill out
565 * @verbose: be verbose
567 * Converts an ATA error into a SCSI error. Fill out pointers to
568 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
569 * format sense blocks.
572 * spin_lock_irqsave(host lock)
574 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
575 u8 *ascq, int verbose)
579 /* Based on the 3ware driver translation table */
580 static const unsigned char sense_table[][4] = {
582 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
584 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
586 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
587 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
588 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
589 /* MC|ID|ABRT|TRK0|MARK */
590 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
592 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
593 /* Bad address mark */
594 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
596 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
598 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
599 /* Media change request */
600 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
602 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
604 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
606 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
607 /* BBD - block marked bad */
608 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
609 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
611 static const unsigned char stat_table[][4] = {
612 /* Must be first because BUSY means no other bits valid */
613 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
614 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
615 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
616 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
617 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
621 * Is this an error we can process/parse
623 if (drv_stat & ATA_BUSY) {
624 drv_err = 0; /* Ignore the err bits, they're invalid */
628 /* Look for drv_err */
629 for (i = 0; sense_table[i][0] != 0xFF; i++) {
630 /* Look for best matches first */
631 if ((sense_table[i][0] & drv_err) ==
633 *sk = sense_table[i][1];
634 *asc = sense_table[i][2];
635 *ascq = sense_table[i][3];
639 /* No immediate match */
641 printk(KERN_WARNING "ata%u: no sense translation for "
642 "error 0x%02x\n", id, drv_err);
645 /* Fall back to interpreting status bits */
646 for (i = 0; stat_table[i][0] != 0xFF; i++) {
647 if (stat_table[i][0] & drv_stat) {
648 *sk = stat_table[i][1];
649 *asc = stat_table[i][2];
650 *ascq = stat_table[i][3];
654 /* No error? Undecoded? */
656 printk(KERN_WARNING "ata%u: no sense translation for "
657 "status: 0x%02x\n", id, drv_stat);
659 /* We need a sensible error return here, which is tricky, and one
660 that won't cause people to do things like return a disk wrongly */
661 *sk = ABORTED_COMMAND;
667 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
668 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
669 id, drv_stat, drv_err, *sk, *asc, *ascq);
674 * ata_gen_passthru_sense - Generate check condition sense block.
675 * @qc: Command that completed.
677 * This function is specific to the ATA descriptor format sense
678 * block specified for the ATA pass through commands. Regardless
679 * of whether the command errored or not, return a sense
680 * block. Copy all controller registers into the sense
681 * block. Clear sense key, ASC & ASCQ if there is no error.
686 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
688 struct scsi_cmnd *cmd = qc->scsicmd;
689 struct ata_taskfile *tf = &qc->result_tf;
690 unsigned char *sb = cmd->sense_buffer;
691 unsigned char *desc = sb + 8;
692 int verbose = qc->ap->ops->error_handler == NULL;
694 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
696 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
699 * Use ata_to_sense_error() to map status register bits
700 * onto sense key, asc & ascq.
703 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
704 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
705 &sb[1], &sb[2], &sb[3], verbose);
710 * Sense data is current and format is descriptor.
716 /* set length of additional sense data */
721 * Copy registers into sense buffer.
724 desc[3] = tf->feature; /* == error reg */
729 desc[12] = tf->device;
730 desc[13] = tf->command; /* == status reg */
733 * Fill in Extend bit, and the high order bytes
736 if (tf->flags & ATA_TFLAG_LBA48) {
738 desc[4] = tf->hob_nsect;
739 desc[6] = tf->hob_lbal;
740 desc[8] = tf->hob_lbam;
741 desc[10] = tf->hob_lbah;
746 * ata_gen_ata_sense - generate a SCSI fixed sense block
747 * @qc: Command that we are erroring out
749 * Generate sense block for a failed ATA command @qc. Descriptor
750 * format is used to accomodate LBA48 block address.
755 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
757 struct ata_device *dev = qc->dev;
758 struct scsi_cmnd *cmd = qc->scsicmd;
759 struct ata_taskfile *tf = &qc->result_tf;
760 unsigned char *sb = cmd->sense_buffer;
761 unsigned char *desc = sb + 8;
762 int verbose = qc->ap->ops->error_handler == NULL;
765 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
767 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
769 /* sense data is current and format is descriptor */
772 /* Use ata_to_sense_error() to map status register bits
773 * onto sense key, asc & ascq.
776 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
777 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
778 &sb[1], &sb[2], &sb[3], verbose);
782 block = ata_tf_read_block(&qc->result_tf, dev);
784 /* information sense data descriptor */
789 desc[2] |= 0x80; /* valid */
790 desc[6] = block >> 40;
791 desc[7] = block >> 32;
792 desc[8] = block >> 24;
793 desc[9] = block >> 16;
794 desc[10] = block >> 8;
798 static void ata_scsi_sdev_config(struct scsi_device *sdev)
800 sdev->use_10_for_rw = 1;
801 sdev->use_10_for_ms = 1;
804 static void ata_scsi_dev_config(struct scsi_device *sdev,
805 struct ata_device *dev)
807 /* configure max sectors */
808 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
810 /* SATA DMA transfers must be multiples of 4 byte, so
811 * we need to pad ATAPI transfers using an extra sg.
812 * Decrement max hw segments accordingly.
814 if (dev->class == ATA_DEV_ATAPI) {
815 request_queue_t *q = sdev->request_queue;
816 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
819 if (dev->flags & ATA_DFLAG_NCQ) {
822 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
823 depth = min(ATA_MAX_QUEUE - 1, depth);
824 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
829 * ata_scsi_slave_config - Set SCSI device attributes
830 * @sdev: SCSI device to examine
832 * This is called before we actually start reading
833 * and writing to the device, to configure certain
834 * SCSI mid-layer behaviors.
837 * Defined by SCSI layer. We don't really care.
840 int ata_scsi_slave_config(struct scsi_device *sdev)
842 struct ata_port *ap = ata_shost_to_port(sdev->host);
843 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
845 ata_scsi_sdev_config(sdev);
847 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
850 ata_scsi_dev_config(sdev, dev);
852 return 0; /* scsi layer doesn't check return value, sigh */
856 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
857 * @sdev: SCSI device to be destroyed
859 * @sdev is about to be destroyed for hot/warm unplugging. If
860 * this unplugging was initiated by libata as indicated by NULL
861 * dev->sdev, this function doesn't have to do anything.
862 * Otherwise, SCSI layer initiated warm-unplug is in progress.
863 * Clear dev->sdev, schedule the device for ATA detach and invoke
867 * Defined by SCSI layer. We don't really care.
869 void ata_scsi_slave_destroy(struct scsi_device *sdev)
871 struct ata_port *ap = ata_shost_to_port(sdev->host);
873 struct ata_device *dev;
875 if (!ap->ops->error_handler)
878 spin_lock_irqsave(ap->lock, flags);
879 dev = __ata_scsi_find_dev(ap, sdev);
880 if (dev && dev->sdev) {
881 /* SCSI device already in CANCEL state, no need to offline it */
883 dev->flags |= ATA_DFLAG_DETACH;
884 ata_port_schedule_eh(ap);
886 spin_unlock_irqrestore(ap->lock, flags);
890 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
891 * @sdev: SCSI device to configure queue depth for
892 * @queue_depth: new queue depth
894 * This is libata standard hostt->change_queue_depth callback.
895 * SCSI will call into this callback when user tries to set queue
899 * SCSI layer (we don't care)
902 * Newly configured queue depth.
904 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
906 struct ata_port *ap = ata_shost_to_port(sdev->host);
907 struct ata_device *dev;
912 return sdev->queue_depth;
914 dev = ata_scsi_find_dev(ap, sdev);
915 if (!dev || !ata_dev_enabled(dev))
916 return sdev->queue_depth;
918 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
919 max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
920 if (queue_depth > max_depth)
921 queue_depth = max_depth;
923 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
925 spin_lock_irqsave(ap->lock, flags);
927 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
929 dev->flags |= ATA_DFLAG_NCQ_OFF;
930 spin_unlock_irqrestore(ap->lock, flags);
936 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
937 * @qc: Storage for translated ATA taskfile
938 * @scsicmd: SCSI command to translate
940 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
941 * (to start). Perhaps these commands should be preceded by
942 * CHECK POWER MODE to see what power mode the device is already in.
943 * [See SAT revision 5 at www.t10.org]
946 * spin_lock_irqsave(host lock)
949 * Zero on success, non-zero on error.
952 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
955 struct ata_taskfile *tf = &qc->tf;
957 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
958 tf->protocol = ATA_PROT_NODATA;
959 if (scsicmd[1] & 0x1) {
960 ; /* ignore IMMED bit, violates sat-r05 */
962 if (scsicmd[4] & 0x2)
963 goto invalid_fld; /* LOEJ bit set not supported */
964 if (((scsicmd[4] >> 4) & 0xf) != 0)
965 goto invalid_fld; /* power conditions not supported */
966 if (scsicmd[4] & 0x1) {
967 tf->nsect = 1; /* 1 sector, lba=0 */
969 if (qc->dev->flags & ATA_DFLAG_LBA) {
970 tf->flags |= ATA_TFLAG_LBA;
975 tf->device |= ATA_LBA;
978 tf->lbal = 0x1; /* sect */
979 tf->lbam = 0x0; /* cyl low */
980 tf->lbah = 0x0; /* cyl high */
983 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
985 tf->nsect = 0; /* time period value (0 implies now) */
986 tf->command = ATA_CMD_STANDBY;
987 /* Consider: ATA STANDBY IMMEDIATE command */
990 * Standby and Idle condition timers could be implemented but that
991 * would require libata to implement the Power condition mode page
992 * and allow the user to change it. Changing mode pages requires
993 * MODE SELECT to be implemented.
999 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1000 /* "Invalid field in cbd" */
1006 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1007 * @qc: Storage for translated ATA taskfile
1008 * @scsicmd: SCSI command to translate (ignored)
1010 * Sets up an ATA taskfile to issue FLUSH CACHE or
1014 * spin_lock_irqsave(host lock)
1017 * Zero on success, non-zero on error.
1020 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1022 struct ata_taskfile *tf = &qc->tf;
1024 tf->flags |= ATA_TFLAG_DEVICE;
1025 tf->protocol = ATA_PROT_NODATA;
1027 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1028 tf->command = ATA_CMD_FLUSH_EXT;
1030 tf->command = ATA_CMD_FLUSH;
1036 * scsi_6_lba_len - Get LBA and transfer length
1037 * @scsicmd: SCSI command to translate
1039 * Calculate LBA and transfer length for 6-byte commands.
1043 * @plen: the transfer length
1046 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1051 VPRINTK("six-byte command\n");
1053 lba |= ((u64)scsicmd[2]) << 8;
1054 lba |= ((u64)scsicmd[3]);
1056 len |= ((u32)scsicmd[4]);
1063 * scsi_10_lba_len - Get LBA and transfer length
1064 * @scsicmd: SCSI command to translate
1066 * Calculate LBA and transfer length for 10-byte commands.
1070 * @plen: the transfer length
1073 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1078 VPRINTK("ten-byte command\n");
1080 lba |= ((u64)scsicmd[2]) << 24;
1081 lba |= ((u64)scsicmd[3]) << 16;
1082 lba |= ((u64)scsicmd[4]) << 8;
1083 lba |= ((u64)scsicmd[5]);
1085 len |= ((u32)scsicmd[7]) << 8;
1086 len |= ((u32)scsicmd[8]);
1093 * scsi_16_lba_len - Get LBA and transfer length
1094 * @scsicmd: SCSI command to translate
1096 * Calculate LBA and transfer length for 16-byte commands.
1100 * @plen: the transfer length
1103 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1108 VPRINTK("sixteen-byte command\n");
1110 lba |= ((u64)scsicmd[2]) << 56;
1111 lba |= ((u64)scsicmd[3]) << 48;
1112 lba |= ((u64)scsicmd[4]) << 40;
1113 lba |= ((u64)scsicmd[5]) << 32;
1114 lba |= ((u64)scsicmd[6]) << 24;
1115 lba |= ((u64)scsicmd[7]) << 16;
1116 lba |= ((u64)scsicmd[8]) << 8;
1117 lba |= ((u64)scsicmd[9]);
1119 len |= ((u32)scsicmd[10]) << 24;
1120 len |= ((u32)scsicmd[11]) << 16;
1121 len |= ((u32)scsicmd[12]) << 8;
1122 len |= ((u32)scsicmd[13]);
1129 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1130 * @qc: Storage for translated ATA taskfile
1131 * @scsicmd: SCSI command to translate
1133 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1136 * spin_lock_irqsave(host lock)
1139 * Zero on success, non-zero on error.
1142 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1144 struct ata_taskfile *tf = &qc->tf;
1145 struct ata_device *dev = qc->dev;
1146 u64 dev_sectors = qc->dev->n_sectors;
1150 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1151 tf->protocol = ATA_PROT_NODATA;
1153 if (scsicmd[0] == VERIFY)
1154 scsi_10_lba_len(scsicmd, &block, &n_block);
1155 else if (scsicmd[0] == VERIFY_16)
1156 scsi_16_lba_len(scsicmd, &block, &n_block);
1162 if (block >= dev_sectors)
1164 if ((block + n_block) > dev_sectors)
1167 if (dev->flags & ATA_DFLAG_LBA) {
1168 tf->flags |= ATA_TFLAG_LBA;
1170 if (lba_28_ok(block, n_block)) {
1172 tf->command = ATA_CMD_VERIFY;
1173 tf->device |= (block >> 24) & 0xf;
1174 } else if (lba_48_ok(block, n_block)) {
1175 if (!(dev->flags & ATA_DFLAG_LBA48))
1179 tf->flags |= ATA_TFLAG_LBA48;
1180 tf->command = ATA_CMD_VERIFY_EXT;
1182 tf->hob_nsect = (n_block >> 8) & 0xff;
1184 tf->hob_lbah = (block >> 40) & 0xff;
1185 tf->hob_lbam = (block >> 32) & 0xff;
1186 tf->hob_lbal = (block >> 24) & 0xff;
1188 /* request too large even for LBA48 */
1191 tf->nsect = n_block & 0xff;
1193 tf->lbah = (block >> 16) & 0xff;
1194 tf->lbam = (block >> 8) & 0xff;
1195 tf->lbal = block & 0xff;
1197 tf->device |= ATA_LBA;
1200 u32 sect, head, cyl, track;
1202 if (!lba_28_ok(block, n_block))
1205 /* Convert LBA to CHS */
1206 track = (u32)block / dev->sectors;
1207 cyl = track / dev->heads;
1208 head = track % dev->heads;
1209 sect = (u32)block % dev->sectors + 1;
1211 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1212 (u32)block, track, cyl, head, sect);
1214 /* Check whether the converted CHS can fit.
1218 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1221 tf->command = ATA_CMD_VERIFY;
1222 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1225 tf->lbah = cyl >> 8;
1232 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1233 /* "Invalid field in cbd" */
1237 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1238 /* "Logical Block Address out of range" */
1242 qc->scsicmd->result = SAM_STAT_GOOD;
1247 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1248 * @qc: Storage for translated ATA taskfile
1249 * @scsicmd: SCSI command to translate
1251 * Converts any of six SCSI read/write commands into the
1252 * ATA counterpart, including starting sector (LBA),
1253 * sector count, and taking into account the device's LBA48
1256 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1257 * %WRITE_16 are currently supported.
1260 * spin_lock_irqsave(host lock)
1263 * Zero on success, non-zero on error.
1266 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1268 struct ata_taskfile *tf = &qc->tf;
1269 struct ata_device *dev = qc->dev;
1273 qc->flags |= ATA_QCFLAG_IO;
1274 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1276 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1277 scsicmd[0] == WRITE_16)
1278 tf->flags |= ATA_TFLAG_WRITE;
1280 /* Calculate the SCSI LBA, transfer length and FUA. */
1281 switch (scsicmd[0]) {
1284 scsi_10_lba_len(scsicmd, &block, &n_block);
1285 if (unlikely(scsicmd[1] & (1 << 3)))
1286 tf->flags |= ATA_TFLAG_FUA;
1290 scsi_6_lba_len(scsicmd, &block, &n_block);
1292 /* for 6-byte r/w commands, transfer length 0
1293 * means 256 blocks of data, not 0 block.
1300 scsi_16_lba_len(scsicmd, &block, &n_block);
1301 if (unlikely(scsicmd[1] & (1 << 3)))
1302 tf->flags |= ATA_TFLAG_FUA;
1305 DPRINTK("no-byte command\n");
1309 /* Check and compose ATA command */
1311 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1312 * length 0 means transfer 0 block of data.
1313 * However, for ATA R/W commands, sector count 0 means
1314 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1316 * WARNING: one or two older ATA drives treat 0 as 0...
1320 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1321 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
1323 if (!lba_48_ok(block, n_block))
1326 tf->protocol = ATA_PROT_NCQ;
1327 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1329 if (tf->flags & ATA_TFLAG_WRITE)
1330 tf->command = ATA_CMD_FPDMA_WRITE;
1332 tf->command = ATA_CMD_FPDMA_READ;
1334 qc->nsect = n_block;
1336 tf->nsect = qc->tag << 3;
1337 tf->hob_feature = (n_block >> 8) & 0xff;
1338 tf->feature = n_block & 0xff;
1340 tf->hob_lbah = (block >> 40) & 0xff;
1341 tf->hob_lbam = (block >> 32) & 0xff;
1342 tf->hob_lbal = (block >> 24) & 0xff;
1343 tf->lbah = (block >> 16) & 0xff;
1344 tf->lbam = (block >> 8) & 0xff;
1345 tf->lbal = block & 0xff;
1347 tf->device = 1 << 6;
1348 if (tf->flags & ATA_TFLAG_FUA)
1349 tf->device |= 1 << 7;
1350 } else if (dev->flags & ATA_DFLAG_LBA) {
1351 tf->flags |= ATA_TFLAG_LBA;
1353 if (lba_28_ok(block, n_block)) {
1355 tf->device |= (block >> 24) & 0xf;
1356 } else if (lba_48_ok(block, n_block)) {
1357 if (!(dev->flags & ATA_DFLAG_LBA48))
1361 tf->flags |= ATA_TFLAG_LBA48;
1363 tf->hob_nsect = (n_block >> 8) & 0xff;
1365 tf->hob_lbah = (block >> 40) & 0xff;
1366 tf->hob_lbam = (block >> 32) & 0xff;
1367 tf->hob_lbal = (block >> 24) & 0xff;
1369 /* request too large even for LBA48 */
1372 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1375 qc->nsect = n_block;
1376 tf->nsect = n_block & 0xff;
1378 tf->lbah = (block >> 16) & 0xff;
1379 tf->lbam = (block >> 8) & 0xff;
1380 tf->lbal = block & 0xff;
1382 tf->device |= ATA_LBA;
1385 u32 sect, head, cyl, track;
1387 /* The request -may- be too large for CHS addressing. */
1388 if (!lba_28_ok(block, n_block))
1391 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1394 /* Convert LBA to CHS */
1395 track = (u32)block / dev->sectors;
1396 cyl = track / dev->heads;
1397 head = track % dev->heads;
1398 sect = (u32)block % dev->sectors + 1;
1400 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1401 (u32)block, track, cyl, head, sect);
1403 /* Check whether the converted CHS can fit.
1407 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1410 qc->nsect = n_block;
1411 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1414 tf->lbah = cyl >> 8;
1421 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1422 /* "Invalid field in cbd" */
1426 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1427 /* "Logical Block Address out of range" */
1431 qc->scsicmd->result = SAM_STAT_GOOD;
1435 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1437 struct ata_port *ap = qc->ap;
1438 struct scsi_cmnd *cmd = qc->scsicmd;
1439 u8 *cdb = cmd->cmnd;
1440 int need_sense = (qc->err_mask != 0);
1442 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1443 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1446 if (ap->ops->error_handler &&
1447 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
1448 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1449 (qc->tf.feature == SETFEATURES_WC_OFF))) {
1450 ap->eh_info.action |= ATA_EH_REVALIDATE;
1451 ata_port_schedule_eh(ap);
1454 /* For ATA pass thru (SAT) commands, generate a sense block if
1455 * user mandated it or if there's an error. Note that if we
1456 * generate because the user forced us to, a check condition
1457 * is generated and the ATA register values are returned
1458 * whether the command completed successfully or not. If there
1459 * was no error, SK, ASC and ASCQ will all be zero.
1461 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1462 ((cdb[2] & 0x20) || need_sense)) {
1463 ata_gen_passthru_sense(qc);
1466 cmd->result = SAM_STAT_GOOD;
1468 /* TODO: decide which descriptor format to use
1469 * for 48b LBA devices and call that here
1470 * instead of the fixed desc, which is only
1471 * good for smaller LBA (and maybe CHS?)
1474 ata_gen_ata_sense(qc);
1478 if (need_sense && !ap->ops->error_handler)
1479 ata_dump_status(ap->id, &qc->result_tf);
1487 * ata_scmd_need_defer - Check whether we need to defer scmd
1488 * @dev: ATA device to which the command is addressed
1489 * @is_io: Is the command IO (and thus possibly NCQ)?
1491 * NCQ and non-NCQ commands cannot run together. As upper layer
1492 * only knows the queue depth, we are responsible for maintaining
1493 * exclusion. This function checks whether a new command can be
1497 * spin_lock_irqsave(host lock)
1500 * 1 if deferring is needed, 0 otherwise.
1502 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1504 struct ata_port *ap = dev->ap;
1506 if (!(dev->flags & ATA_DFLAG_NCQ))
1510 if (!ata_tag_valid(ap->active_tag))
1513 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1520 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1521 * @dev: ATA device to which the command is addressed
1522 * @cmd: SCSI command to execute
1523 * @done: SCSI command completion function
1524 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1526 * Our ->queuecommand() function has decided that the SCSI
1527 * command issued can be directly translated into an ATA
1528 * command, rather than handled internally.
1530 * This function sets up an ata_queued_cmd structure for the
1531 * SCSI command, and sends that ata_queued_cmd to the hardware.
1533 * The xlat_func argument (actor) returns 0 if ready to execute
1534 * ATA command, else 1 to finish translation. If 1 is returned
1535 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1536 * to be set reflecting an error condition or clean (early)
1540 * spin_lock_irqsave(host lock)
1543 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1544 * needs to be deferred.
1546 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1547 void (*done)(struct scsi_cmnd *),
1548 ata_xlat_func_t xlat_func)
1550 struct ata_queued_cmd *qc;
1551 u8 *scsicmd = cmd->cmnd;
1552 int is_io = xlat_func == ata_scsi_rw_xlat;
1556 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1559 qc = ata_scsi_qc_new(dev, cmd, done);
1563 /* data is present; dma-map it */
1564 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1565 cmd->sc_data_direction == DMA_TO_DEVICE) {
1566 if (unlikely(cmd->request_bufflen < 1)) {
1567 ata_dev_printk(dev, KERN_WARNING,
1568 "WARNING: zero len r/w req\n");
1573 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1575 ata_sg_init_one(qc, cmd->request_buffer,
1576 cmd->request_bufflen);
1578 qc->dma_dir = cmd->sc_data_direction;
1581 qc->complete_fn = ata_scsi_qc_complete;
1583 if (xlat_func(qc, scsicmd))
1586 /* select device, send command to hardware */
1595 DPRINTK("EXIT - early finish (good or error)\n");
1600 cmd->result = (DID_ERROR << 16);
1603 DPRINTK("EXIT - internal\n");
1607 DPRINTK("EXIT - defer\n");
1608 return SCSI_MLQUEUE_DEVICE_BUSY;
1612 * ata_scsi_rbuf_get - Map response buffer.
1613 * @cmd: SCSI command containing buffer to be mapped.
1614 * @buf_out: Pointer to mapped area.
1616 * Maps buffer contained within SCSI command @cmd.
1619 * spin_lock_irqsave(host lock)
1622 * Length of response buffer.
1625 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1628 unsigned int buflen;
1631 struct scatterlist *sg;
1633 sg = (struct scatterlist *) cmd->request_buffer;
1634 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1635 buflen = sg->length;
1637 buf = cmd->request_buffer;
1638 buflen = cmd->request_bufflen;
1646 * ata_scsi_rbuf_put - Unmap response buffer.
1647 * @cmd: SCSI command containing buffer to be unmapped.
1648 * @buf: buffer to unmap
1650 * Unmaps response buffer contained within @cmd.
1653 * spin_lock_irqsave(host lock)
1656 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1659 struct scatterlist *sg;
1661 sg = (struct scatterlist *) cmd->request_buffer;
1662 kunmap_atomic(buf - sg->offset, KM_USER0);
1667 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1668 * @args: device IDENTIFY data / SCSI command of interest.
1669 * @actor: Callback hook for desired SCSI command simulator
1671 * Takes care of the hard work of simulating a SCSI command...
1672 * Mapping the response buffer, calling the command's handler,
1673 * and handling the handler's return value. This return value
1674 * indicates whether the handler wishes the SCSI command to be
1675 * completed successfully (0), or not (in which case cmd->result
1676 * and sense buffer are assumed to be set).
1679 * spin_lock_irqsave(host lock)
1682 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1683 unsigned int (*actor) (struct ata_scsi_args *args,
1684 u8 *rbuf, unsigned int buflen))
1687 unsigned int buflen, rc;
1688 struct scsi_cmnd *cmd = args->cmd;
1690 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1691 memset(rbuf, 0, buflen);
1692 rc = actor(args, rbuf, buflen);
1693 ata_scsi_rbuf_put(cmd, rbuf);
1696 cmd->result = SAM_STAT_GOOD;
1701 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1702 * @idx: byte index into SCSI response buffer
1703 * @val: value to set
1705 * To be used by SCSI command simulator functions. This macros
1706 * expects two local variables, u8 *rbuf and unsigned int buflen,
1712 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1713 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1717 * ata_scsiop_inq_std - Simulate INQUIRY command
1718 * @args: device IDENTIFY data / SCSI command of interest.
1719 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1720 * @buflen: Response buffer length.
1722 * Returns standard device identification data associated
1723 * with non-VPD INQUIRY command output.
1726 * spin_lock_irqsave(host lock)
1729 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1730 unsigned int buflen)
1735 0x5, /* claim SPC-3 version compatibility */
1740 /* set scsi removeable (RMB) bit per ata bit */
1741 if (ata_id_removeable(args->id))
1746 memcpy(rbuf, hdr, sizeof(hdr));
1749 memcpy(&rbuf[8], "ATA ", 8);
1750 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1751 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1752 if (rbuf[32] == 0 || rbuf[32] == ' ')
1753 memcpy(&rbuf[32], "n/a ", 4);
1757 const u8 versions[] = {
1758 0x60, /* SAM-3 (no version claimed) */
1761 0x20, /* SBC-2 (no version claimed) */
1764 0x60 /* SPC-3 (no version claimed) */
1767 memcpy(rbuf + 59, versions, sizeof(versions));
1774 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1775 * @args: device IDENTIFY data / SCSI command of interest.
1776 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1777 * @buflen: Response buffer length.
1779 * Returns list of inquiry VPD pages available.
1782 * spin_lock_irqsave(host lock)
1785 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1786 unsigned int buflen)
1788 const u8 pages[] = {
1789 0x00, /* page 0x00, this page */
1790 0x80, /* page 0x80, unit serial no page */
1791 0x83 /* page 0x83, device ident page */
1793 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1796 memcpy(rbuf + 4, pages, sizeof(pages));
1802 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1803 * @args: device IDENTIFY data / SCSI command of interest.
1804 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1805 * @buflen: Response buffer length.
1807 * Returns ATA device serial number.
1810 * spin_lock_irqsave(host lock)
1813 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1814 unsigned int buflen)
1818 0x80, /* this page code */
1820 ATA_SERNO_LEN, /* page len */
1822 memcpy(rbuf, hdr, sizeof(hdr));
1824 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1825 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1826 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1832 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1833 * @args: device IDENTIFY data / SCSI command of interest.
1834 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1835 * @buflen: Response buffer length.
1837 * Yields two logical unit device identification designators:
1838 * - vendor specific ASCII containing the ATA serial number
1839 * - SAT defined "t10 vendor id based" containing ASCII vendor
1840 * name ("ATA "), model and serial numbers.
1843 * spin_lock_irqsave(host lock)
1846 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1847 unsigned int buflen)
1850 const int sat_model_serial_desc_len = 68;
1851 const int ata_model_byte_len = 40;
1853 rbuf[1] = 0x83; /* this page code */
1856 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1857 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1859 rbuf[num + 3] = ATA_SERNO_LEN;
1861 ata_id_string(args->id, (unsigned char *) rbuf + num,
1862 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1863 num += ATA_SERNO_LEN;
1865 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1866 /* SAT defined lu model and serial numbers descriptor */
1867 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1870 rbuf[num + 3] = sat_model_serial_desc_len;
1872 memcpy(rbuf + num, "ATA ", 8);
1874 ata_id_string(args->id, (unsigned char *) rbuf + num,
1875 ATA_ID_PROD_OFS, ata_model_byte_len);
1876 num += ata_model_byte_len;
1877 ata_id_string(args->id, (unsigned char *) rbuf + num,
1878 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1879 num += ATA_SERNO_LEN;
1881 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1886 * ata_scsiop_noop - Command handler that simply returns success.
1887 * @args: device IDENTIFY data / SCSI command of interest.
1888 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1889 * @buflen: Response buffer length.
1891 * No operation. Simply returns success to caller, to indicate
1892 * that the caller should successfully complete this SCSI command.
1895 * spin_lock_irqsave(host lock)
1898 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1899 unsigned int buflen)
1906 * ata_msense_push - Push data onto MODE SENSE data output buffer
1907 * @ptr_io: (input/output) Location to store more output data
1908 * @last: End of output data buffer
1909 * @buf: Pointer to BLOB being added to output buffer
1910 * @buflen: Length of BLOB
1912 * Store MODE SENSE data on an output buffer.
1918 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1919 const u8 *buf, unsigned int buflen)
1923 if ((ptr + buflen - 1) > last)
1926 memcpy(ptr, buf, buflen);
1934 * ata_msense_caching - Simulate MODE SENSE caching info page
1935 * @id: device IDENTIFY data
1936 * @ptr_io: (input/output) Location to store more output data
1937 * @last: End of output data buffer
1939 * Generate a caching info page, which conditionally indicates
1940 * write caching to the SCSI layer, depending on device
1947 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1950 u8 page[CACHE_MPAGE_LEN];
1952 memcpy(page, def_cache_mpage, sizeof(page));
1953 if (ata_id_wcache_enabled(id))
1954 page[2] |= (1 << 2); /* write cache enable */
1955 if (!ata_id_rahead_enabled(id))
1956 page[12] |= (1 << 5); /* disable read ahead */
1958 ata_msense_push(ptr_io, last, page, sizeof(page));
1959 return sizeof(page);
1963 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1964 * @dev: Device associated with this MODE SENSE command
1965 * @ptr_io: (input/output) Location to store more output data
1966 * @last: End of output data buffer
1968 * Generate a generic MODE SENSE control mode page.
1974 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1976 ata_msense_push(ptr_io, last, def_control_mpage,
1977 sizeof(def_control_mpage));
1978 return sizeof(def_control_mpage);
1982 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1983 * @dev: Device associated with this MODE SENSE command
1984 * @ptr_io: (input/output) Location to store more output data
1985 * @last: End of output data buffer
1987 * Generate a generic MODE SENSE r/w error recovery page.
1993 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1996 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1997 sizeof(def_rw_recovery_mpage));
1998 return sizeof(def_rw_recovery_mpage);
2002 * We can turn this into a real blacklist if it's needed, for now just
2003 * blacklist any Maxtor BANC1G10 revision firmware
2005 static int ata_dev_supports_fua(u16 *id)
2007 unsigned char model[41], fw[9];
2011 if (!ata_id_has_fua(id))
2014 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
2015 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
2017 if (strcmp(model, "Maxtor"))
2019 if (strcmp(fw, "BANC1G10"))
2022 return 0; /* blacklisted */
2026 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2027 * @args: device IDENTIFY data / SCSI command of interest.
2028 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2029 * @buflen: Response buffer length.
2031 * Simulate MODE SENSE commands. Assume this is invoked for direct
2032 * access devices (e.g. disks) only. There should be no block
2033 * descriptor for other device types.
2036 * spin_lock_irqsave(host lock)
2039 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2040 unsigned int buflen)
2042 struct ata_device *dev = args->dev;
2043 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2044 const u8 sat_blk_desc[] = {
2045 0, 0, 0, 0, /* number of blocks: sat unspecified */
2047 0, 0x2, 0x0 /* block length: 512 bytes */
2050 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2055 six_byte = (scsicmd[0] == MODE_SENSE);
2056 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2058 * LLBA bit in msense(10) ignored (compliant)
2061 page_control = scsicmd[2] >> 6;
2062 switch (page_control) {
2063 case 0: /* current */
2064 break; /* supported */
2066 goto saving_not_supp;
2067 case 1: /* changeable */
2068 case 2: /* defaults */
2074 output_len = 4 + (ebd ? 8 : 0);
2075 alloc_len = scsicmd[4];
2077 output_len = 8 + (ebd ? 8 : 0);
2078 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2080 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2082 p = rbuf + output_len;
2083 last = rbuf + minlen - 1;
2085 pg = scsicmd[2] & 0x3f;
2088 * No mode subpages supported (yet) but asking for _all_
2089 * subpages may be valid
2091 if (spg && (spg != ALL_SUB_MPAGES))
2095 case RW_RECOVERY_MPAGE:
2096 output_len += ata_msense_rw_recovery(&p, last);
2100 output_len += ata_msense_caching(args->id, &p, last);
2103 case CONTROL_MPAGE: {
2104 output_len += ata_msense_ctl_mode(&p, last);
2109 output_len += ata_msense_rw_recovery(&p, last);
2110 output_len += ata_msense_caching(args->id, &p, last);
2111 output_len += ata_msense_ctl_mode(&p, last);
2114 default: /* invalid page code */
2122 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2123 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2128 rbuf[0] = output_len;
2133 rbuf[3] = sizeof(sat_blk_desc);
2135 memcpy(rbuf + 4, sat_blk_desc,
2136 sizeof(sat_blk_desc));
2140 rbuf[0] = output_len >> 8;
2142 rbuf[1] = output_len;
2147 rbuf[7] = sizeof(sat_blk_desc);
2149 memcpy(rbuf + 8, sat_blk_desc,
2150 sizeof(sat_blk_desc));
2156 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2157 /* "Invalid field in cbd" */
2161 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2162 /* "Saving parameters not supported" */
2167 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2168 * @args: device IDENTIFY data / SCSI command of interest.
2169 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2170 * @buflen: Response buffer length.
2172 * Simulate READ CAPACITY commands.
2177 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2178 unsigned int buflen)
2180 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2184 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2185 if (last_lba >= 0xffffffffULL)
2186 last_lba = 0xffffffff;
2188 /* sector count, 32-bit */
2189 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2190 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2191 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2192 ATA_SCSI_RBUF_SET(3, last_lba);
2195 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2196 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2198 /* sector count, 64-bit */
2199 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2200 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2201 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2202 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2203 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2204 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2205 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2206 ATA_SCSI_RBUF_SET(7, last_lba);
2209 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2210 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2217 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2218 * @args: device IDENTIFY data / SCSI command of interest.
2219 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2220 * @buflen: Response buffer length.
2222 * Simulate REPORT LUNS command.
2225 * spin_lock_irqsave(host lock)
2228 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2229 unsigned int buflen)
2232 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2238 * ata_scsi_set_sense - Set SCSI sense data and status
2239 * @cmd: SCSI request to be handled
2240 * @sk: SCSI-defined sense key
2241 * @asc: SCSI-defined additional sense code
2242 * @ascq: SCSI-defined additional sense code qualifier
2244 * Helper function that builds a valid fixed format, current
2245 * response code and the given sense key (sk), additional sense
2246 * code (asc) and additional sense code qualifier (ascq) with
2247 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2248 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2254 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2256 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2258 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2259 cmd->sense_buffer[2] = sk;
2260 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2261 cmd->sense_buffer[12] = asc;
2262 cmd->sense_buffer[13] = ascq;
2266 * ata_scsi_badcmd - End a SCSI request with an error
2267 * @cmd: SCSI request to be handled
2268 * @done: SCSI command completion function
2269 * @asc: SCSI-defined additional sense code
2270 * @ascq: SCSI-defined additional sense code qualifier
2272 * Helper function that completes a SCSI command with
2273 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2274 * and the specified additional sense codes.
2277 * spin_lock_irqsave(host lock)
2280 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2283 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2288 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2290 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2291 /* FIXME: not quite right; we don't want the
2292 * translation of taskfile registers into
2293 * a sense descriptors, since that's only
2294 * correct for ATA, not ATAPI
2296 ata_gen_passthru_sense(qc);
2299 qc->scsidone(qc->scsicmd);
2303 /* is it pointless to prefer PIO for "safety reasons"? */
2304 static inline int ata_pio_use_silly(struct ata_port *ap)
2306 return (ap->flags & ATA_FLAG_PIO_DMA);
2309 static void atapi_request_sense(struct ata_queued_cmd *qc)
2311 struct ata_port *ap = qc->ap;
2312 struct scsi_cmnd *cmd = qc->scsicmd;
2314 DPRINTK("ATAPI request sense\n");
2316 /* FIXME: is this needed? */
2317 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2319 ap->ops->tf_read(ap, &qc->tf);
2321 /* fill these in, for the case where they are -not- overwritten */
2322 cmd->sense_buffer[0] = 0x70;
2323 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2327 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2328 qc->dma_dir = DMA_FROM_DEVICE;
2330 memset(&qc->cdb, 0, qc->dev->cdb_len);
2331 qc->cdb[0] = REQUEST_SENSE;
2332 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2334 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2335 qc->tf.command = ATA_CMD_PACKET;
2337 if (ata_pio_use_silly(ap)) {
2338 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2339 qc->tf.feature |= ATAPI_PKT_DMA;
2341 qc->tf.protocol = ATA_PROT_ATAPI;
2342 qc->tf.lbam = (8 * 1024) & 0xff;
2343 qc->tf.lbah = (8 * 1024) >> 8;
2345 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2347 qc->complete_fn = atapi_sense_complete;
2354 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2356 struct scsi_cmnd *cmd = qc->scsicmd;
2357 unsigned int err_mask = qc->err_mask;
2359 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2361 /* handle completion from new EH */
2362 if (unlikely(qc->ap->ops->error_handler &&
2363 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2365 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2366 /* FIXME: not quite right; we don't want the
2367 * translation of taskfile registers into a
2368 * sense descriptors, since that's only
2369 * correct for ATA, not ATAPI
2371 ata_gen_passthru_sense(qc);
2374 /* SCSI EH automatically locks door if sdev->locked is
2375 * set. Sometimes door lock request continues to
2376 * fail, for example, when no media is present. This
2377 * creates a loop - SCSI EH issues door lock which
2378 * fails and gets invoked again to acquire sense data
2379 * for the failed command.
2381 * If door lock fails, always clear sdev->locked to
2382 * avoid this infinite loop.
2384 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2385 qc->dev->sdev->locked = 0;
2387 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2393 /* successful completion or old EH failure path */
2394 if (unlikely(err_mask & AC_ERR_DEV)) {
2395 cmd->result = SAM_STAT_CHECK_CONDITION;
2396 atapi_request_sense(qc);
2398 } else if (unlikely(err_mask)) {
2399 /* FIXME: not quite right; we don't want the
2400 * translation of taskfile registers into
2401 * a sense descriptors, since that's only
2402 * correct for ATA, not ATAPI
2404 ata_gen_passthru_sense(qc);
2406 u8 *scsicmd = cmd->cmnd;
2408 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2410 unsigned int buflen;
2412 buflen = ata_scsi_rbuf_get(cmd, &buf);
2414 /* ATAPI devices typically report zero for their SCSI version,
2415 * and sometimes deviate from the spec WRT response data
2416 * format. If SCSI version is reported as zero like normal,
2417 * then we make the following fixups: 1) Fake MMC-5 version,
2418 * to indicate to the Linux scsi midlayer this is a modern
2419 * device. 2) Ensure response data format / ATAPI information
2420 * are always correct.
2427 ata_scsi_rbuf_put(cmd, buf);
2430 cmd->result = SAM_STAT_GOOD;
2437 * atapi_xlat - Initialize PACKET taskfile
2438 * @qc: command structure to be initialized
2439 * @scsicmd: SCSI CDB associated with this PACKET command
2442 * spin_lock_irqsave(host lock)
2445 * Zero on success, non-zero on failure.
2448 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2450 struct scsi_cmnd *cmd = qc->scsicmd;
2451 struct ata_device *dev = qc->dev;
2452 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2453 int nodata = (cmd->sc_data_direction == DMA_NONE);
2456 /* Check whether ATAPI DMA is safe */
2457 if (ata_check_atapi_dma(qc))
2460 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
2462 qc->complete_fn = atapi_qc_complete;
2464 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2465 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2466 qc->tf.flags |= ATA_TFLAG_WRITE;
2467 DPRINTK("direction: write\n");
2470 qc->tf.command = ATA_CMD_PACKET;
2472 /* no data, or PIO data xfer */
2473 if (using_pio || nodata) {
2475 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2477 qc->tf.protocol = ATA_PROT_ATAPI;
2478 qc->tf.lbam = (8 * 1024) & 0xff;
2479 qc->tf.lbah = (8 * 1024) >> 8;
2484 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2485 qc->tf.feature |= ATAPI_PKT_DMA;
2487 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2488 /* some SATA bridges need us to indicate data xfer direction */
2489 qc->tf.feature |= ATAPI_DMADIR;
2492 qc->nbytes = cmd->request_bufflen;
2497 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2499 if (likely(id < ATA_MAX_DEVICES))
2500 return &ap->device[id];
2504 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2505 const struct scsi_device *scsidev)
2507 /* skip commands not addressed to targets we simulate */
2508 if (unlikely(scsidev->channel || scsidev->lun))
2511 return ata_find_dev(ap, scsidev->id);
2515 * ata_scsi_dev_enabled - determine if device is enabled
2518 * Determine if commands should be sent to the specified device.
2521 * spin_lock_irqsave(host lock)
2524 * 0 if commands are not allowed / 1 if commands are allowed
2527 static int ata_scsi_dev_enabled(struct ata_device *dev)
2529 if (unlikely(!ata_dev_enabled(dev)))
2532 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2533 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2534 ata_dev_printk(dev, KERN_WARNING,
2535 "WARNING: ATAPI is %s, device ignored.\n",
2536 atapi_enabled ? "not supported with this driver" : "disabled");
2545 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2546 * @ap: ATA port to which the device is attached
2547 * @scsidev: SCSI device from which we derive the ATA device
2549 * Given various information provided in struct scsi_cmnd,
2550 * map that onto an ATA bus, and using that mapping
2551 * determine which ata_device is associated with the
2552 * SCSI command to be sent.
2555 * spin_lock_irqsave(host lock)
2558 * Associated ATA device, or %NULL if not found.
2560 static struct ata_device *
2561 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2563 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2565 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2572 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2573 * @byte1: Byte 1 from pass-thru CDB.
2576 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2579 ata_scsi_map_proto(u8 byte1)
2581 switch((byte1 & 0x1e) >> 1) {
2582 case 3: /* Non-data */
2583 return ATA_PROT_NODATA;
2586 return ATA_PROT_DMA;
2588 case 4: /* PIO Data-in */
2589 case 5: /* PIO Data-out */
2590 return ATA_PROT_PIO;
2592 case 10: /* Device Reset */
2593 case 0: /* Hard Reset */
2595 case 2: /* Bus Idle */
2596 case 7: /* Packet */
2597 case 8: /* DMA Queued */
2598 case 9: /* Device Diagnostic */
2599 case 11: /* UDMA Data-in */
2600 case 12: /* UDMA Data-Out */
2601 case 13: /* FPDMA */
2602 default: /* Reserved */
2606 return ATA_PROT_UNKNOWN;
2610 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2611 * @qc: command structure to be initialized
2612 * @scsicmd: SCSI command to convert
2614 * Handles either 12 or 16-byte versions of the CDB.
2617 * Zero on success, non-zero on failure.
2620 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2622 struct ata_taskfile *tf = &(qc->tf);
2623 struct scsi_cmnd *cmd = qc->scsicmd;
2624 struct ata_device *dev = qc->dev;
2626 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2629 /* We may not issue DMA commands if no DMA mode is set */
2630 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2633 if (scsicmd[1] & 0xe0)
2634 /* PIO multi not supported yet */
2638 * 12 and 16 byte CDBs use different offsets to
2639 * provide the various register values.
2641 if (scsicmd[0] == ATA_16) {
2643 * 16-byte CDB - may contain extended commands.
2645 * If that is the case, copy the upper byte register values.
2647 if (scsicmd[1] & 0x01) {
2648 tf->hob_feature = scsicmd[3];
2649 tf->hob_nsect = scsicmd[5];
2650 tf->hob_lbal = scsicmd[7];
2651 tf->hob_lbam = scsicmd[9];
2652 tf->hob_lbah = scsicmd[11];
2653 tf->flags |= ATA_TFLAG_LBA48;
2655 tf->flags &= ~ATA_TFLAG_LBA48;
2658 * Always copy low byte, device and command registers.
2660 tf->feature = scsicmd[4];
2661 tf->nsect = scsicmd[6];
2662 tf->lbal = scsicmd[8];
2663 tf->lbam = scsicmd[10];
2664 tf->lbah = scsicmd[12];
2665 tf->device = scsicmd[13];
2666 tf->command = scsicmd[14];
2669 * 12-byte CDB - incapable of extended commands.
2671 tf->flags &= ~ATA_TFLAG_LBA48;
2673 tf->feature = scsicmd[3];
2674 tf->nsect = scsicmd[4];
2675 tf->lbal = scsicmd[5];
2676 tf->lbam = scsicmd[6];
2677 tf->lbah = scsicmd[7];
2678 tf->device = scsicmd[8];
2679 tf->command = scsicmd[9];
2682 * If slave is possible, enforce correct master/slave bit
2684 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2685 tf->device = qc->dev->devno ?
2686 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2689 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2690 * SET_FEATURES - XFER MODE must be preceded/succeeded
2691 * by an update to hardware-specific registers for each
2692 * controller (i.e. the reason for ->set_piomode(),
2693 * ->set_dmamode(), and ->post_set_mode() hooks).
2695 if ((tf->command == ATA_CMD_SET_FEATURES)
2696 && (tf->feature == SETFEATURES_XFER))
2700 * Set flags so that all registers will be written,
2701 * and pass on write indication (used for PIO/DMA
2704 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2706 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2707 tf->flags |= ATA_TFLAG_WRITE;
2710 * Set transfer length.
2712 * TODO: find out if we need to do more here to
2713 * cover scatter/gather case.
2715 qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
2717 /* request result TF */
2718 qc->flags |= ATA_QCFLAG_RESULT_TF;
2723 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2724 /* "Invalid field in cdb" */
2729 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2731 * @cmd: SCSI command opcode to consider
2733 * Look up the SCSI command given, and determine whether the
2734 * SCSI command is to be translated or simulated.
2737 * Pointer to translation function if possible, %NULL if not.
2740 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2750 return ata_scsi_rw_xlat;
2752 case SYNCHRONIZE_CACHE:
2753 if (ata_try_flush_cache(dev))
2754 return ata_scsi_flush_xlat;
2759 return ata_scsi_verify_xlat;
2763 return ata_scsi_pass_thru;
2766 return ata_scsi_start_stop_xlat;
2773 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2774 * @ap: ATA port to which the command was being sent
2775 * @cmd: SCSI command to dump
2777 * Prints the contents of a SCSI command via printk().
2780 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2781 struct scsi_cmnd *cmd)
2784 struct scsi_device *scsidev = cmd->device;
2785 u8 *scsicmd = cmd->cmnd;
2787 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2789 scsidev->channel, scsidev->id, scsidev->lun,
2790 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2791 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2796 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2797 void (*done)(struct scsi_cmnd *),
2798 struct ata_device *dev)
2802 if (dev->class == ATA_DEV_ATA) {
2803 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2807 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
2809 ata_scsi_simulate(dev, cmd, done);
2811 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2817 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2818 * @cmd: SCSI command to be sent
2819 * @done: Completion function, called when command is complete
2821 * In some cases, this function translates SCSI commands into
2822 * ATA taskfiles, and queues the taskfiles to be sent to
2823 * hardware. In other cases, this function simulates a
2824 * SCSI device by evaluating and responding to certain
2825 * SCSI commands. This creates the overall effect of
2826 * ATA and ATAPI devices appearing as SCSI devices.
2829 * Releases scsi-layer-held lock, and obtains host lock.
2832 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2835 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2837 struct ata_port *ap;
2838 struct ata_device *dev;
2839 struct scsi_device *scsidev = cmd->device;
2840 struct Scsi_Host *shost = scsidev->host;
2843 ap = ata_shost_to_port(shost);
2845 spin_unlock(shost->host_lock);
2846 spin_lock(ap->lock);
2848 ata_scsi_dump_cdb(ap, cmd);
2850 dev = ata_scsi_find_dev(ap, scsidev);
2852 rc = __ata_scsi_queuecmd(cmd, done, dev);
2854 cmd->result = (DID_BAD_TARGET << 16);
2858 spin_unlock(ap->lock);
2859 spin_lock(shost->host_lock);
2864 * ata_scsi_simulate - simulate SCSI command on ATA device
2865 * @dev: the target device
2866 * @cmd: SCSI command being sent to device.
2867 * @done: SCSI command completion function.
2869 * Interprets and directly executes a select list of SCSI commands
2870 * that can be handled internally.
2873 * spin_lock_irqsave(host lock)
2876 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2877 void (*done)(struct scsi_cmnd *))
2879 struct ata_scsi_args args;
2880 const u8 *scsicmd = cmd->cmnd;
2887 switch(scsicmd[0]) {
2888 /* no-op's, complete with success */
2889 case SYNCHRONIZE_CACHE:
2893 case TEST_UNIT_READY:
2894 case FORMAT_UNIT: /* FIXME: correct? */
2895 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2896 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2900 if (scsicmd[1] & 2) /* is CmdDt set? */
2901 ata_scsi_invalid_field(cmd, done);
2902 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2903 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2904 else if (scsicmd[2] == 0x00)
2905 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2906 else if (scsicmd[2] == 0x80)
2907 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2908 else if (scsicmd[2] == 0x83)
2909 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2911 ata_scsi_invalid_field(cmd, done);
2916 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2919 case MODE_SELECT: /* unconditionally return */
2920 case MODE_SELECT_10: /* bad-field-in-cdb */
2921 ata_scsi_invalid_field(cmd, done);
2925 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2928 case SERVICE_ACTION_IN:
2929 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2930 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2932 ata_scsi_invalid_field(cmd, done);
2936 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2939 /* mandatory commands we haven't implemented yet */
2942 /* all other commands */
2944 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2945 /* "Invalid command operation code" */
2951 void ata_scsi_scan_host(struct ata_port *ap)
2955 if (ap->flags & ATA_FLAG_DISABLED)
2958 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2959 struct ata_device *dev = &ap->device[i];
2960 struct scsi_device *sdev;
2962 if (!ata_dev_enabled(dev) || dev->sdev)
2965 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
2966 if (!IS_ERR(sdev)) {
2968 scsi_device_put(sdev);
2974 * ata_scsi_offline_dev - offline attached SCSI device
2975 * @dev: ATA device to offline attached SCSI device for
2977 * This function is called from ata_eh_hotplug() and responsible
2978 * for taking the SCSI device attached to @dev offline. This
2979 * function is called with host lock which protects dev->sdev
2983 * spin_lock_irqsave(host lock)
2986 * 1 if attached SCSI device exists, 0 otherwise.
2988 int ata_scsi_offline_dev(struct ata_device *dev)
2991 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
2998 * ata_scsi_remove_dev - remove attached SCSI device
2999 * @dev: ATA device to remove attached SCSI device for
3001 * This function is called from ata_eh_scsi_hotplug() and
3002 * responsible for removing the SCSI device attached to @dev.
3005 * Kernel thread context (may sleep).
3007 static void ata_scsi_remove_dev(struct ata_device *dev)
3009 struct ata_port *ap = dev->ap;
3010 struct scsi_device *sdev;
3011 unsigned long flags;
3013 /* Alas, we need to grab scan_mutex to ensure SCSI device
3014 * state doesn't change underneath us and thus
3015 * scsi_device_get() always succeeds. The mutex locking can
3016 * be removed if there is __scsi_device_get() interface which
3017 * increments reference counts regardless of device state.
3019 mutex_lock(&ap->scsi_host->scan_mutex);
3020 spin_lock_irqsave(ap->lock, flags);
3022 /* clearing dev->sdev is protected by host lock */
3027 /* If user initiated unplug races with us, sdev can go
3028 * away underneath us after the host lock and
3029 * scan_mutex are released. Hold onto it.
3031 if (scsi_device_get(sdev) == 0) {
3032 /* The following ensures the attached sdev is
3033 * offline on return from ata_scsi_offline_dev()
3034 * regardless it wins or loses the race
3035 * against this function.
3037 scsi_device_set_state(sdev, SDEV_OFFLINE);
3044 spin_unlock_irqrestore(ap->lock, flags);
3045 mutex_unlock(&ap->scsi_host->scan_mutex);
3048 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3049 sdev->sdev_gendev.bus_id);
3051 scsi_remove_device(sdev);
3052 scsi_device_put(sdev);
3057 * ata_scsi_hotplug - SCSI part of hotplug
3058 * @data: Pointer to ATA port to perform SCSI hotplug on
3060 * Perform SCSI part of hotplug. It's executed from a separate
3061 * workqueue after EH completes. This is necessary because SCSI
3062 * hot plugging requires working EH and hot unplugging is
3063 * synchronized with hot plugging with a mutex.
3066 * Kernel thread context (may sleep).
3068 void ata_scsi_hotplug(void *data)
3070 struct ata_port *ap = data;
3073 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3074 DPRINTK("ENTER/EXIT - unloading\n");
3080 /* unplug detached devices */
3081 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3082 struct ata_device *dev = &ap->device[i];
3083 unsigned long flags;
3085 if (!(dev->flags & ATA_DFLAG_DETACHED))
3088 spin_lock_irqsave(ap->lock, flags);
3089 dev->flags &= ~ATA_DFLAG_DETACHED;
3090 spin_unlock_irqrestore(ap->lock, flags);
3092 ata_scsi_remove_dev(dev);
3095 /* scan for new ones */
3096 ata_scsi_scan_host(ap);
3098 /* If we scanned while EH was in progress, scan would have
3099 * failed silently. Requeue if there are enabled but
3100 * unattached devices.
3102 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3103 struct ata_device *dev = &ap->device[i];
3104 if (ata_dev_enabled(dev) && !dev->sdev) {
3105 queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
3114 * ata_scsi_user_scan - indication for user-initiated bus scan
3115 * @shost: SCSI host to scan
3116 * @channel: Channel to scan
3120 * This function is called when user explicitly requests bus
3121 * scan. Set probe pending flag and invoke EH.
3124 * SCSI layer (we don't care)
3129 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3130 unsigned int id, unsigned int lun)
3132 struct ata_port *ap = ata_shost_to_port(shost);
3133 unsigned long flags;
3136 if (!ap->ops->error_handler)
3139 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3140 (lun != SCAN_WILD_CARD && lun != 0))
3143 spin_lock_irqsave(ap->lock, flags);
3145 if (id == SCAN_WILD_CARD) {
3146 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3147 ap->eh_info.action |= ATA_EH_SOFTRESET;
3149 struct ata_device *dev = ata_find_dev(ap, id);
3152 ap->eh_info.probe_mask |= 1 << dev->devno;
3153 ap->eh_info.action |= ATA_EH_SOFTRESET;
3154 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
3160 ata_port_schedule_eh(ap);
3161 spin_unlock_irqrestore(ap->lock, flags);
3162 ata_port_wait_eh(ap);
3164 spin_unlock_irqrestore(ap->lock, flags);
3170 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3171 * @data: Pointer to ATA port to perform scsi_rescan_device()
3173 * After ATA pass thru (SAT) commands are executed successfully,
3174 * libata need to propagate the changes to SCSI layer. This
3175 * function must be executed from ata_aux_wq such that sdev
3176 * attach/detach don't race with rescan.
3179 * Kernel thread context (may sleep).
3181 void ata_scsi_dev_rescan(void *data)
3183 struct ata_port *ap = data;
3184 unsigned long flags;
3187 spin_lock_irqsave(ap->lock, flags);
3189 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3190 struct ata_device *dev = &ap->device[i];
3191 struct scsi_device *sdev = dev->sdev;
3193 if (!ata_dev_enabled(dev) || !sdev)
3195 if (scsi_device_get(sdev))
3198 spin_unlock_irqrestore(ap->lock, flags);
3199 scsi_rescan_device(&(sdev->sdev_gendev));
3200 scsi_device_put(sdev);
3201 spin_lock_irqsave(ap->lock, flags);
3204 spin_unlock_irqrestore(ap->lock, flags);
3208 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3209 * @host: ATA host container for all SAS ports
3210 * @port_info: Information from low-level host driver
3211 * @shost: SCSI host that the scsi device is attached to
3214 * PCI/etc. bus probe sem.
3217 * ata_port pointer on success / NULL on failure.
3220 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3221 struct ata_port_info *port_info,
3222 struct Scsi_Host *shost)
3224 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3225 struct ata_probe_ent *ent;
3230 ent = ata_probe_ent_alloc(host->dev, port_info);
3236 ata_port_init(ap, host, ent, 0);
3237 ap->lock = shost->host_lock;
3241 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3244 * ata_sas_port_start - Set port up for dma.
3245 * @ap: Port to initialize
3247 * Called just after data structures for each port are
3248 * initialized. Allocates DMA pad.
3250 * May be used as the port_start() entry in ata_port_operations.
3253 * Inherited from caller.
3255 int ata_sas_port_start(struct ata_port *ap)
3257 return ata_pad_alloc(ap, ap->dev);
3259 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3262 * ata_port_stop - Undo ata_sas_port_start()
3263 * @ap: Port to shut down
3265 * Frees the DMA pad.
3267 * May be used as the port_stop() entry in ata_port_operations.
3270 * Inherited from caller.
3273 void ata_sas_port_stop(struct ata_port *ap)
3275 ata_pad_free(ap, ap->dev);
3277 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3280 * ata_sas_port_init - Initialize a SATA device
3281 * @ap: SATA port to initialize
3284 * PCI/etc. bus probe sem.
3287 * Zero on success, non-zero on error.
3290 int ata_sas_port_init(struct ata_port *ap)
3292 int rc = ap->ops->port_start(ap);
3295 rc = ata_bus_probe(ap);
3299 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3302 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3303 * @ap: SATA port to destroy
3307 void ata_sas_port_destroy(struct ata_port *ap)
3309 ap->ops->port_stop(ap);
3312 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3315 * ata_sas_slave_configure - Default slave_config routine for libata devices
3316 * @sdev: SCSI device to configure
3317 * @ap: ATA port to which SCSI device is attached
3323 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3325 ata_scsi_sdev_config(sdev);
3326 ata_scsi_dev_config(sdev, ap->device);
3329 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3332 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3333 * @cmd: SCSI command to be sent
3334 * @done: Completion function, called when command is complete
3335 * @ap: ATA port to which the command is being sent
3338 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3342 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3343 struct ata_port *ap)
3347 ata_scsi_dump_cdb(ap, cmd);
3349 if (likely(ata_scsi_dev_enabled(ap->device)))
3350 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
3352 cmd->result = (DID_BAD_TARGET << 16);
3357 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);