2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage[] = {
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
81 0, /* write retry count */
85 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
94 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
107 struct scsi_transport_template ata_scsi_transport_template = {
108 .eh_strategy_handler = ata_scsi_error,
109 .eh_timed_out = ata_scsi_timed_out,
110 .user_scan = ata_scsi_user_scan,
114 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
135 * Defined by the SCSI layer. We don't really care.
140 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
145 sector_div(capacity, 255*63);
152 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
153 * @sdev: SCSI device to get identify data for
154 * @arg: User buffer area for identify data
157 * Defined by the SCSI layer. We don't really care.
160 * Zero on success, negative errno on error.
162 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
164 struct ata_port *ap = ata_shost_to_port(sdev->host);
165 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
166 u16 __user *dst = arg;
172 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
175 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
176 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
179 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
180 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
183 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
184 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
191 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
192 * @scsidev: Device to which we are issuing command
193 * @arg: User provided data for issuing command
196 * Defined by the SCSI layer. We don't really care.
199 * Zero on success, negative errno on error.
201 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
204 u8 scsi_cmd[MAX_COMMAND_SIZE];
205 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
207 enum dma_data_direction data_dir;
213 if (copy_from_user(args, arg, sizeof(args)))
216 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
220 memset(scsi_cmd, 0, sizeof(scsi_cmd));
223 argsize = SECTOR_SIZE * args[3];
224 argbuf = kmalloc(argsize, GFP_KERNEL);
225 if (argbuf == NULL) {
230 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
231 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
232 block count in sector count field */
233 data_dir = DMA_FROM_DEVICE;
235 scsi_cmd[1] = (3 << 1); /* Non-data */
236 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
240 scsi_cmd[0] = ATA_16;
242 scsi_cmd[4] = args[2];
243 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
244 scsi_cmd[6] = args[3];
245 scsi_cmd[8] = args[1];
249 scsi_cmd[6] = args[1];
251 scsi_cmd[14] = args[0];
253 /* Good values for timeout and retries? Values below
254 from scsi_ioctl_send_command() for default case... */
255 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
256 sensebuf, (10*HZ), 5, 0);
258 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
259 u8 *desc = sensebuf + 8;
260 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
262 /* If we set cc then ATA pass-through will cause a
263 * check condition even if no error. Filter that. */
264 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
265 struct scsi_sense_hdr sshdr;
266 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
268 if (sshdr.sense_key==0 &&
269 sshdr.asc==0 && sshdr.ascq==0)
270 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
273 /* Send userspace a few ATA registers (same as drivers/ide) */
274 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
275 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
276 args[0] = desc[13]; /* status */
277 args[1] = desc[3]; /* error */
278 args[2] = desc[5]; /* sector count (0:7) */
279 if (copy_to_user(arg, args, sizeof(args)))
291 && copy_to_user(arg + sizeof(args), argbuf, argsize))
300 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
301 * @scsidev: Device to which we are issuing command
302 * @arg: User provided data for issuing command
305 * Defined by the SCSI layer. We don't really care.
308 * Zero on success, negative errno on error.
310 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
313 u8 scsi_cmd[MAX_COMMAND_SIZE];
314 u8 args[7], *sensebuf = NULL;
320 if (copy_from_user(args, arg, sizeof(args)))
323 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
327 memset(scsi_cmd, 0, sizeof(scsi_cmd));
328 scsi_cmd[0] = ATA_16;
329 scsi_cmd[1] = (3 << 1); /* Non-data */
330 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
331 scsi_cmd[4] = args[1];
332 scsi_cmd[6] = args[2];
333 scsi_cmd[8] = args[3];
334 scsi_cmd[10] = args[4];
335 scsi_cmd[12] = args[5];
336 scsi_cmd[13] = args[6] & 0x0f;
337 scsi_cmd[14] = args[0];
339 /* Good values for timeout and retries? Values below
340 from scsi_ioctl_send_command() for default case... */
341 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
342 sensebuf, (10*HZ), 5, 0);
344 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
345 u8 *desc = sensebuf + 8;
346 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
348 /* If we set cc then ATA pass-through will cause a
349 * check condition even if no error. Filter that. */
350 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
351 struct scsi_sense_hdr sshdr;
352 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
354 if (sshdr.sense_key==0 &&
355 sshdr.asc==0 && sshdr.ascq==0)
356 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
359 /* Send userspace ATA registers */
360 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
361 desc[0] == 0x09) {/* code is "ATA Descriptor" */
362 args[0] = desc[13]; /* status */
363 args[1] = desc[3]; /* error */
364 args[2] = desc[5]; /* sector count (0:7) */
365 args[3] = desc[7]; /* lbal */
366 args[4] = desc[9]; /* lbam */
367 args[5] = desc[11]; /* lbah */
368 args[6] = desc[12]; /* select */
369 if (copy_to_user(arg, args, sizeof(args)))
384 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
386 int val = -EINVAL, rc = -EINVAL;
389 case ATA_IOC_GET_IO32:
391 if (copy_to_user(arg, &val, 1))
395 case ATA_IOC_SET_IO32:
396 val = (unsigned long) arg;
401 case HDIO_GET_IDENTITY:
402 return ata_get_identity(scsidev, arg);
405 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
407 return ata_cmd_ioctl(scsidev, arg);
409 case HDIO_DRIVE_TASK:
410 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
412 return ata_task_ioctl(scsidev, arg);
423 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
424 * @dev: ATA device to which the new command is attached
425 * @cmd: SCSI command that originated this ATA command
426 * @done: SCSI command completion function
428 * Obtain a reference to an unused ata_queued_cmd structure,
429 * which is the basic libata structure representing a single
430 * ATA command sent to the hardware.
432 * If a command was available, fill in the SCSI-specific
433 * portions of the structure with information on the
437 * spin_lock_irqsave(host lock)
440 * Command allocated, or %NULL if none available.
442 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
443 struct scsi_cmnd *cmd,
444 void (*done)(struct scsi_cmnd *))
446 struct ata_queued_cmd *qc;
448 qc = ata_qc_new_init(dev);
454 qc->__sg = (struct scatterlist *) cmd->request_buffer;
455 qc->n_elem = cmd->use_sg;
456 } else if (cmd->request_bufflen) {
457 qc->__sg = &qc->sgent;
461 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
469 * ata_dump_status - user friendly display of error info
470 * @id: id of the port in question
471 * @tf: ptr to filled out taskfile
473 * Decode and dump the ATA error/status registers for the user so
474 * that they have some idea what really happened at the non
475 * make-believe layer.
478 * inherited from caller
480 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
482 u8 stat = tf->command, err = tf->feature;
484 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
485 if (stat & ATA_BUSY) {
486 printk("Busy }\n"); /* Data is not valid in this case */
488 if (stat & 0x40) printk("DriveReady ");
489 if (stat & 0x20) printk("DeviceFault ");
490 if (stat & 0x10) printk("SeekComplete ");
491 if (stat & 0x08) printk("DataRequest ");
492 if (stat & 0x04) printk("CorrectedError ");
493 if (stat & 0x02) printk("Index ");
494 if (stat & 0x01) printk("Error ");
498 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
499 if (err & 0x04) printk("DriveStatusError ");
501 if (err & 0x04) printk("BadCRC ");
502 else printk("Sector ");
504 if (err & 0x40) printk("UncorrectableError ");
505 if (err & 0x10) printk("SectorIdNotFound ");
506 if (err & 0x02) printk("TrackZeroNotFound ");
507 if (err & 0x01) printk("AddrMarkNotFound ");
515 * ata_scsi_device_suspend - suspend ATA device associated with sdev
516 * @sdev: the SCSI device to suspend
517 * @mesg: target power management message
519 * Request suspend EH action on the ATA device associated with
520 * @sdev and wait for the operation to complete.
523 * Kernel thread context (may sleep).
526 * 0 on success, -errno otherwise.
528 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
530 struct ata_port *ap = ata_shost_to_port(sdev->host);
531 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
539 spin_lock_irqsave(ap->lock, flags);
541 /* wait for the previous resume to complete */
542 while (dev->flags & ATA_DFLAG_SUSPENDED) {
543 spin_unlock_irqrestore(ap->lock, flags);
544 ata_port_wait_eh(ap);
545 spin_lock_irqsave(ap->lock, flags);
548 /* if @sdev is already detached, nothing to do */
549 if (sdev->sdev_state == SDEV_OFFLINE ||
550 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
553 /* request suspend */
554 action = ATA_EH_SUSPEND;
555 if (mesg.event != PM_EVENT_SUSPEND)
556 action |= ATA_EH_PM_FREEZE;
557 ap->eh_info.dev_action[dev->devno] |= action;
558 ap->eh_info.flags |= ATA_EHI_QUIET;
559 ata_port_schedule_eh(ap);
561 spin_unlock_irqrestore(ap->lock, flags);
563 /* wait for EH to do the job */
564 ata_port_wait_eh(ap);
566 spin_lock_irqsave(ap->lock, flags);
568 /* If @sdev is still attached but the associated ATA device
569 * isn't suspended, the operation failed.
571 if (sdev->sdev_state != SDEV_OFFLINE &&
572 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
573 !(dev->flags & ATA_DFLAG_SUSPENDED))
577 spin_unlock_irqrestore(ap->lock, flags);
580 sdev->sdev_gendev.power.power_state = mesg;
585 * ata_scsi_device_resume - resume ATA device associated with sdev
586 * @sdev: the SCSI device to resume
588 * Request resume EH action on the ATA device associated with
589 * @sdev and return immediately. This enables parallel
590 * wakeup/spinup of devices.
593 * Kernel thread context (may sleep).
598 int ata_scsi_device_resume(struct scsi_device *sdev)
600 struct ata_port *ap = ata_shost_to_port(sdev->host);
601 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
602 struct ata_eh_info *ehi = &ap->eh_info;
609 spin_lock_irqsave(ap->lock, flags);
611 /* if @sdev is already detached, nothing to do */
612 if (sdev->sdev_state == SDEV_OFFLINE ||
613 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
617 action = ATA_EH_RESUME;
618 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
619 __ata_ehi_hotplugged(ehi);
621 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
622 ehi->dev_action[dev->devno] |= action;
624 /* We don't want autopsy and verbose EH messages. Disable
625 * those if we're the only device on this link.
627 if (ata_port_max_devices(ap) == 1)
628 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
630 ata_port_schedule_eh(ap);
633 spin_unlock_irqrestore(ap->lock, flags);
635 sdev->sdev_gendev.power.power_state = PMSG_ON;
638 #endif /* CONFIG_PM */
641 * ata_to_sense_error - convert ATA error to SCSI error
642 * @id: ATA device number
643 * @drv_stat: value contained in ATA status register
644 * @drv_err: value contained in ATA error register
645 * @sk: the sense key we'll fill out
646 * @asc: the additional sense code we'll fill out
647 * @ascq: the additional sense code qualifier we'll fill out
648 * @verbose: be verbose
650 * Converts an ATA error into a SCSI error. Fill out pointers to
651 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
652 * format sense blocks.
655 * spin_lock_irqsave(host lock)
657 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
658 u8 *asc, u8 *ascq, int verbose)
662 /* Based on the 3ware driver translation table */
663 static const unsigned char sense_table[][4] = {
665 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
667 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
669 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
670 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
671 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
672 /* MC|ID|ABRT|TRK0|MARK */
673 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
675 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
676 /* Bad address mark */
677 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
679 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
681 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
682 /* Media change request */
683 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
685 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
687 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
689 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
690 /* BBD - block marked bad */
691 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
692 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
694 static const unsigned char stat_table[][4] = {
695 /* Must be first because BUSY means no other bits valid */
696 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
697 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
698 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
699 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
700 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
704 * Is this an error we can process/parse
706 if (drv_stat & ATA_BUSY) {
707 drv_err = 0; /* Ignore the err bits, they're invalid */
711 /* Look for drv_err */
712 for (i = 0; sense_table[i][0] != 0xFF; i++) {
713 /* Look for best matches first */
714 if ((sense_table[i][0] & drv_err) ==
716 *sk = sense_table[i][1];
717 *asc = sense_table[i][2];
718 *ascq = sense_table[i][3];
722 /* No immediate match */
724 printk(KERN_WARNING "ata%u: no sense translation for "
725 "error 0x%02x\n", id, drv_err);
728 /* Fall back to interpreting status bits */
729 for (i = 0; stat_table[i][0] != 0xFF; i++) {
730 if (stat_table[i][0] & drv_stat) {
731 *sk = stat_table[i][1];
732 *asc = stat_table[i][2];
733 *ascq = stat_table[i][3];
737 /* No error? Undecoded? */
739 printk(KERN_WARNING "ata%u: no sense translation for "
740 "status: 0x%02x\n", id, drv_stat);
742 /* We need a sensible error return here, which is tricky, and one
743 that won't cause people to do things like return a disk wrongly */
744 *sk = ABORTED_COMMAND;
750 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
751 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
752 id, drv_stat, drv_err, *sk, *asc, *ascq);
757 * ata_gen_passthru_sense - Generate check condition sense block.
758 * @qc: Command that completed.
760 * This function is specific to the ATA descriptor format sense
761 * block specified for the ATA pass through commands. Regardless
762 * of whether the command errored or not, return a sense
763 * block. Copy all controller registers into the sense
764 * block. Clear sense key, ASC & ASCQ if there is no error.
769 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
771 struct scsi_cmnd *cmd = qc->scsicmd;
772 struct ata_taskfile *tf = &qc->result_tf;
773 unsigned char *sb = cmd->sense_buffer;
774 unsigned char *desc = sb + 8;
775 int verbose = qc->ap->ops->error_handler == NULL;
777 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
779 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
782 * Use ata_to_sense_error() to map status register bits
783 * onto sense key, asc & ascq.
786 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
787 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
788 &sb[1], &sb[2], &sb[3], verbose);
793 * Sense data is current and format is descriptor.
799 /* set length of additional sense data */
804 * Copy registers into sense buffer.
807 desc[3] = tf->feature; /* == error reg */
812 desc[12] = tf->device;
813 desc[13] = tf->command; /* == status reg */
816 * Fill in Extend bit, and the high order bytes
819 if (tf->flags & ATA_TFLAG_LBA48) {
821 desc[4] = tf->hob_nsect;
822 desc[6] = tf->hob_lbal;
823 desc[8] = tf->hob_lbam;
824 desc[10] = tf->hob_lbah;
829 * ata_gen_ata_sense - generate a SCSI fixed sense block
830 * @qc: Command that we are erroring out
832 * Generate sense block for a failed ATA command @qc. Descriptor
833 * format is used to accomodate LBA48 block address.
838 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
840 struct ata_device *dev = qc->dev;
841 struct scsi_cmnd *cmd = qc->scsicmd;
842 struct ata_taskfile *tf = &qc->result_tf;
843 unsigned char *sb = cmd->sense_buffer;
844 unsigned char *desc = sb + 8;
845 int verbose = qc->ap->ops->error_handler == NULL;
848 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
850 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
852 /* sense data is current and format is descriptor */
855 /* Use ata_to_sense_error() to map status register bits
856 * onto sense key, asc & ascq.
859 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
860 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
861 &sb[1], &sb[2], &sb[3], verbose);
865 block = ata_tf_read_block(&qc->result_tf, dev);
867 /* information sense data descriptor */
872 desc[2] |= 0x80; /* valid */
873 desc[6] = block >> 40;
874 desc[7] = block >> 32;
875 desc[8] = block >> 24;
876 desc[9] = block >> 16;
877 desc[10] = block >> 8;
881 static void ata_scsi_sdev_config(struct scsi_device *sdev)
883 sdev->use_10_for_rw = 1;
884 sdev->use_10_for_ms = 1;
887 static void ata_scsi_dev_config(struct scsi_device *sdev,
888 struct ata_device *dev)
890 /* configure max sectors */
891 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
893 /* SATA DMA transfers must be multiples of 4 byte, so
894 * we need to pad ATAPI transfers using an extra sg.
895 * Decrement max hw segments accordingly.
897 if (dev->class == ATA_DEV_ATAPI) {
898 request_queue_t *q = sdev->request_queue;
899 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
902 if (dev->flags & ATA_DFLAG_NCQ) {
905 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
906 depth = min(ATA_MAX_QUEUE - 1, depth);
907 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
912 * ata_scsi_slave_config - Set SCSI device attributes
913 * @sdev: SCSI device to examine
915 * This is called before we actually start reading
916 * and writing to the device, to configure certain
917 * SCSI mid-layer behaviors.
920 * Defined by SCSI layer. We don't really care.
923 int ata_scsi_slave_config(struct scsi_device *sdev)
925 struct ata_port *ap = ata_shost_to_port(sdev->host);
926 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
928 ata_scsi_sdev_config(sdev);
930 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
933 ata_scsi_dev_config(sdev, dev);
935 return 0; /* scsi layer doesn't check return value, sigh */
939 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
940 * @sdev: SCSI device to be destroyed
942 * @sdev is about to be destroyed for hot/warm unplugging. If
943 * this unplugging was initiated by libata as indicated by NULL
944 * dev->sdev, this function doesn't have to do anything.
945 * Otherwise, SCSI layer initiated warm-unplug is in progress.
946 * Clear dev->sdev, schedule the device for ATA detach and invoke
950 * Defined by SCSI layer. We don't really care.
952 void ata_scsi_slave_destroy(struct scsi_device *sdev)
954 struct ata_port *ap = ata_shost_to_port(sdev->host);
956 struct ata_device *dev;
958 if (!ap->ops->error_handler)
961 spin_lock_irqsave(ap->lock, flags);
962 dev = __ata_scsi_find_dev(ap, sdev);
963 if (dev && dev->sdev) {
964 /* SCSI device already in CANCEL state, no need to offline it */
966 dev->flags |= ATA_DFLAG_DETACH;
967 ata_port_schedule_eh(ap);
969 spin_unlock_irqrestore(ap->lock, flags);
973 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
974 * @sdev: SCSI device to configure queue depth for
975 * @queue_depth: new queue depth
977 * This is libata standard hostt->change_queue_depth callback.
978 * SCSI will call into this callback when user tries to set queue
982 * SCSI layer (we don't care)
985 * Newly configured queue depth.
987 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
989 struct ata_port *ap = ata_shost_to_port(sdev->host);
990 struct ata_device *dev;
993 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
994 return sdev->queue_depth;
996 dev = ata_scsi_find_dev(ap, sdev);
997 if (!dev || !ata_dev_enabled(dev))
998 return sdev->queue_depth;
1001 spin_lock_irqsave(ap->lock, flags);
1002 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1003 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1004 dev->flags |= ATA_DFLAG_NCQ_OFF;
1007 spin_unlock_irqrestore(ap->lock, flags);
1009 /* limit and apply queue depth */
1010 queue_depth = min(queue_depth, sdev->host->can_queue);
1011 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1012 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1014 if (sdev->queue_depth == queue_depth)
1017 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1022 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1023 * @qc: Storage for translated ATA taskfile
1025 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1026 * (to start). Perhaps these commands should be preceded by
1027 * CHECK POWER MODE to see what power mode the device is already in.
1028 * [See SAT revision 5 at www.t10.org]
1031 * spin_lock_irqsave(host lock)
1034 * Zero on success, non-zero on error.
1036 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1038 struct scsi_cmnd *scmd = qc->scsicmd;
1039 struct ata_taskfile *tf = &qc->tf;
1040 const u8 *cdb = scmd->cmnd;
1042 if (scmd->cmd_len < 5)
1045 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1046 tf->protocol = ATA_PROT_NODATA;
1048 ; /* ignore IMMED bit, violates sat-r05 */
1051 goto invalid_fld; /* LOEJ bit set not supported */
1052 if (((cdb[4] >> 4) & 0xf) != 0)
1053 goto invalid_fld; /* power conditions not supported */
1055 tf->nsect = 1; /* 1 sector, lba=0 */
1057 if (qc->dev->flags & ATA_DFLAG_LBA) {
1058 tf->flags |= ATA_TFLAG_LBA;
1063 tf->device |= ATA_LBA;
1066 tf->lbal = 0x1; /* sect */
1067 tf->lbam = 0x0; /* cyl low */
1068 tf->lbah = 0x0; /* cyl high */
1071 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1073 /* Issue ATA STANDBY IMMEDIATE command */
1074 tf->command = ATA_CMD_STANDBYNOW1;
1077 * Standby and Idle condition timers could be implemented but that
1078 * would require libata to implement the Power condition mode page
1079 * and allow the user to change it. Changing mode pages requires
1080 * MODE SELECT to be implemented.
1086 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1087 /* "Invalid field in cbd" */
1093 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1094 * @qc: Storage for translated ATA taskfile
1096 * Sets up an ATA taskfile to issue FLUSH CACHE or
1100 * spin_lock_irqsave(host lock)
1103 * Zero on success, non-zero on error.
1105 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1107 struct ata_taskfile *tf = &qc->tf;
1109 tf->flags |= ATA_TFLAG_DEVICE;
1110 tf->protocol = ATA_PROT_NODATA;
1112 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1113 tf->command = ATA_CMD_FLUSH_EXT;
1115 tf->command = ATA_CMD_FLUSH;
1121 * scsi_6_lba_len - Get LBA and transfer length
1122 * @cdb: SCSI command to translate
1124 * Calculate LBA and transfer length for 6-byte commands.
1128 * @plen: the transfer length
1130 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1135 VPRINTK("six-byte command\n");
1137 lba |= ((u64)cdb[2]) << 8;
1138 lba |= ((u64)cdb[3]);
1140 len |= ((u32)cdb[4]);
1147 * scsi_10_lba_len - Get LBA and transfer length
1148 * @cdb: SCSI command to translate
1150 * Calculate LBA and transfer length for 10-byte commands.
1154 * @plen: the transfer length
1156 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1161 VPRINTK("ten-byte command\n");
1163 lba |= ((u64)cdb[2]) << 24;
1164 lba |= ((u64)cdb[3]) << 16;
1165 lba |= ((u64)cdb[4]) << 8;
1166 lba |= ((u64)cdb[5]);
1168 len |= ((u32)cdb[7]) << 8;
1169 len |= ((u32)cdb[8]);
1176 * scsi_16_lba_len - Get LBA and transfer length
1177 * @cdb: SCSI command to translate
1179 * Calculate LBA and transfer length for 16-byte commands.
1183 * @plen: the transfer length
1185 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1190 VPRINTK("sixteen-byte command\n");
1192 lba |= ((u64)cdb[2]) << 56;
1193 lba |= ((u64)cdb[3]) << 48;
1194 lba |= ((u64)cdb[4]) << 40;
1195 lba |= ((u64)cdb[5]) << 32;
1196 lba |= ((u64)cdb[6]) << 24;
1197 lba |= ((u64)cdb[7]) << 16;
1198 lba |= ((u64)cdb[8]) << 8;
1199 lba |= ((u64)cdb[9]);
1201 len |= ((u32)cdb[10]) << 24;
1202 len |= ((u32)cdb[11]) << 16;
1203 len |= ((u32)cdb[12]) << 8;
1204 len |= ((u32)cdb[13]);
1211 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1212 * @qc: Storage for translated ATA taskfile
1214 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1217 * spin_lock_irqsave(host lock)
1220 * Zero on success, non-zero on error.
1222 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1224 struct scsi_cmnd *scmd = qc->scsicmd;
1225 struct ata_taskfile *tf = &qc->tf;
1226 struct ata_device *dev = qc->dev;
1227 u64 dev_sectors = qc->dev->n_sectors;
1228 const u8 *cdb = scmd->cmnd;
1232 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1233 tf->protocol = ATA_PROT_NODATA;
1235 if (cdb[0] == VERIFY) {
1236 if (scmd->cmd_len < 10)
1238 scsi_10_lba_len(cdb, &block, &n_block);
1239 } else if (cdb[0] == VERIFY_16) {
1240 if (scmd->cmd_len < 16)
1242 scsi_16_lba_len(cdb, &block, &n_block);
1248 if (block >= dev_sectors)
1250 if ((block + n_block) > dev_sectors)
1253 if (dev->flags & ATA_DFLAG_LBA) {
1254 tf->flags |= ATA_TFLAG_LBA;
1256 if (lba_28_ok(block, n_block)) {
1258 tf->command = ATA_CMD_VERIFY;
1259 tf->device |= (block >> 24) & 0xf;
1260 } else if (lba_48_ok(block, n_block)) {
1261 if (!(dev->flags & ATA_DFLAG_LBA48))
1265 tf->flags |= ATA_TFLAG_LBA48;
1266 tf->command = ATA_CMD_VERIFY_EXT;
1268 tf->hob_nsect = (n_block >> 8) & 0xff;
1270 tf->hob_lbah = (block >> 40) & 0xff;
1271 tf->hob_lbam = (block >> 32) & 0xff;
1272 tf->hob_lbal = (block >> 24) & 0xff;
1274 /* request too large even for LBA48 */
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 if (!lba_28_ok(block, n_block))
1291 /* Convert LBA to CHS */
1292 track = (u32)block / dev->sectors;
1293 cyl = track / dev->heads;
1294 head = track % dev->heads;
1295 sect = (u32)block % dev->sectors + 1;
1297 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1298 (u32)block, track, cyl, head, sect);
1300 /* Check whether the converted CHS can fit.
1304 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1307 tf->command = ATA_CMD_VERIFY;
1308 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1311 tf->lbah = cyl >> 8;
1318 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1319 /* "Invalid field in cbd" */
1323 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1324 /* "Logical Block Address out of range" */
1328 scmd->result = SAM_STAT_GOOD;
1333 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1334 * @qc: Storage for translated ATA taskfile
1336 * Converts any of six SCSI read/write commands into the
1337 * ATA counterpart, including starting sector (LBA),
1338 * sector count, and taking into account the device's LBA48
1341 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1342 * %WRITE_16 are currently supported.
1345 * spin_lock_irqsave(host lock)
1348 * Zero on success, non-zero on error.
1350 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1352 struct scsi_cmnd *scmd = qc->scsicmd;
1353 const u8 *cdb = scmd->cmnd;
1354 unsigned int tf_flags = 0;
1359 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1360 tf_flags |= ATA_TFLAG_WRITE;
1362 /* Calculate the SCSI LBA, transfer length and FUA. */
1366 if (unlikely(scmd->cmd_len < 10))
1368 scsi_10_lba_len(cdb, &block, &n_block);
1369 if (unlikely(cdb[1] & (1 << 3)))
1370 tf_flags |= ATA_TFLAG_FUA;
1374 if (unlikely(scmd->cmd_len < 6))
1376 scsi_6_lba_len(cdb, &block, &n_block);
1378 /* for 6-byte r/w commands, transfer length 0
1379 * means 256 blocks of data, not 0 block.
1386 if (unlikely(scmd->cmd_len < 16))
1388 scsi_16_lba_len(cdb, &block, &n_block);
1389 if (unlikely(cdb[1] & (1 << 3)))
1390 tf_flags |= ATA_TFLAG_FUA;
1393 DPRINTK("no-byte command\n");
1397 /* Check and compose ATA command */
1399 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1400 * length 0 means transfer 0 block of data.
1401 * However, for ATA R/W commands, sector count 0 means
1402 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1404 * WARNING: one or two older ATA drives treat 0 as 0...
1408 qc->flags |= ATA_QCFLAG_IO;
1409 qc->nbytes = n_block * ATA_SECT_SIZE;
1411 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1413 if (likely(rc == 0))
1418 /* treat all other errors as -EINVAL, fall through */
1420 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1421 /* "Invalid field in cbd" */
1425 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1426 /* "Logical Block Address out of range" */
1430 scmd->result = SAM_STAT_GOOD;
1434 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1436 struct ata_port *ap = qc->ap;
1437 struct scsi_cmnd *cmd = qc->scsicmd;
1438 u8 *cdb = cmd->cmnd;
1439 int need_sense = (qc->err_mask != 0);
1441 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1442 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1445 if (ap->ops->error_handler &&
1446 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
1447 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1448 (qc->tf.feature == SETFEATURES_WC_OFF))) {
1449 ap->eh_info.action |= ATA_EH_REVALIDATE;
1450 ata_port_schedule_eh(ap);
1453 /* For ATA pass thru (SAT) commands, generate a sense block if
1454 * user mandated it or if there's an error. Note that if we
1455 * generate because the user forced us to, a check condition
1456 * is generated and the ATA register values are returned
1457 * whether the command completed successfully or not. If there
1458 * was no error, SK, ASC and ASCQ will all be zero.
1460 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1461 ((cdb[2] & 0x20) || need_sense)) {
1462 ata_gen_passthru_sense(qc);
1465 cmd->result = SAM_STAT_GOOD;
1467 /* TODO: decide which descriptor format to use
1468 * for 48b LBA devices and call that here
1469 * instead of the fixed desc, which is only
1470 * good for smaller LBA (and maybe CHS?)
1473 ata_gen_ata_sense(qc);
1477 if (need_sense && !ap->ops->error_handler)
1478 ata_dump_status(ap->print_id, &qc->result_tf);
1486 * ata_scmd_need_defer - Check whether we need to defer scmd
1487 * @dev: ATA device to which the command is addressed
1488 * @is_io: Is the command IO (and thus possibly NCQ)?
1490 * NCQ and non-NCQ commands cannot run together. As upper layer
1491 * only knows the queue depth, we are responsible for maintaining
1492 * exclusion. This function checks whether a new command can be
1496 * spin_lock_irqsave(host lock)
1499 * 1 if deferring is needed, 0 otherwise.
1501 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1503 struct ata_port *ap = dev->ap;
1504 int is_ncq = is_io && ata_ncq_enabled(dev);
1507 if (!ata_tag_valid(ap->active_tag))
1510 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1517 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1518 * @dev: ATA device to which the command is addressed
1519 * @cmd: SCSI command to execute
1520 * @done: SCSI command completion function
1521 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1523 * Our ->queuecommand() function has decided that the SCSI
1524 * command issued can be directly translated into an ATA
1525 * command, rather than handled internally.
1527 * This function sets up an ata_queued_cmd structure for the
1528 * SCSI command, and sends that ata_queued_cmd to the hardware.
1530 * The xlat_func argument (actor) returns 0 if ready to execute
1531 * ATA command, else 1 to finish translation. If 1 is returned
1532 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1533 * to be set reflecting an error condition or clean (early)
1537 * spin_lock_irqsave(host lock)
1540 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1541 * needs to be deferred.
1543 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1544 void (*done)(struct scsi_cmnd *),
1545 ata_xlat_func_t xlat_func)
1547 struct ata_queued_cmd *qc;
1548 int is_io = xlat_func == ata_scsi_rw_xlat;
1552 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1555 qc = ata_scsi_qc_new(dev, cmd, done);
1559 /* data is present; dma-map it */
1560 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1561 cmd->sc_data_direction == DMA_TO_DEVICE) {
1562 if (unlikely(cmd->request_bufflen < 1)) {
1563 ata_dev_printk(dev, KERN_WARNING,
1564 "WARNING: zero len r/w req\n");
1569 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1571 ata_sg_init_one(qc, cmd->request_buffer,
1572 cmd->request_bufflen);
1574 qc->dma_dir = cmd->sc_data_direction;
1577 qc->complete_fn = ata_scsi_qc_complete;
1582 /* select device, send command to hardware */
1591 DPRINTK("EXIT - early finish (good or error)\n");
1596 cmd->result = (DID_ERROR << 16);
1599 DPRINTK("EXIT - internal\n");
1603 DPRINTK("EXIT - defer\n");
1604 return SCSI_MLQUEUE_DEVICE_BUSY;
1608 * ata_scsi_rbuf_get - Map response buffer.
1609 * @cmd: SCSI command containing buffer to be mapped.
1610 * @buf_out: Pointer to mapped area.
1612 * Maps buffer contained within SCSI command @cmd.
1615 * spin_lock_irqsave(host lock)
1618 * Length of response buffer.
1621 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1624 unsigned int buflen;
1627 struct scatterlist *sg;
1629 sg = (struct scatterlist *) cmd->request_buffer;
1630 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1631 buflen = sg->length;
1633 buf = cmd->request_buffer;
1634 buflen = cmd->request_bufflen;
1642 * ata_scsi_rbuf_put - Unmap response buffer.
1643 * @cmd: SCSI command containing buffer to be unmapped.
1644 * @buf: buffer to unmap
1646 * Unmaps response buffer contained within @cmd.
1649 * spin_lock_irqsave(host lock)
1652 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1655 struct scatterlist *sg;
1657 sg = (struct scatterlist *) cmd->request_buffer;
1658 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1663 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1664 * @args: device IDENTIFY data / SCSI command of interest.
1665 * @actor: Callback hook for desired SCSI command simulator
1667 * Takes care of the hard work of simulating a SCSI command...
1668 * Mapping the response buffer, calling the command's handler,
1669 * and handling the handler's return value. This return value
1670 * indicates whether the handler wishes the SCSI command to be
1671 * completed successfully (0), or not (in which case cmd->result
1672 * and sense buffer are assumed to be set).
1675 * spin_lock_irqsave(host lock)
1678 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1679 unsigned int (*actor) (struct ata_scsi_args *args,
1680 u8 *rbuf, unsigned int buflen))
1683 unsigned int buflen, rc;
1684 struct scsi_cmnd *cmd = args->cmd;
1686 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1687 memset(rbuf, 0, buflen);
1688 rc = actor(args, rbuf, buflen);
1689 ata_scsi_rbuf_put(cmd, rbuf);
1692 cmd->result = SAM_STAT_GOOD;
1697 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1698 * @idx: byte index into SCSI response buffer
1699 * @val: value to set
1701 * To be used by SCSI command simulator functions. This macros
1702 * expects two local variables, u8 *rbuf and unsigned int buflen,
1708 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1709 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1713 * ata_scsiop_inq_std - Simulate INQUIRY command
1714 * @args: device IDENTIFY data / SCSI command of interest.
1715 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1716 * @buflen: Response buffer length.
1718 * Returns standard device identification data associated
1719 * with non-VPD INQUIRY command output.
1722 * spin_lock_irqsave(host lock)
1725 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1726 unsigned int buflen)
1731 0x5, /* claim SPC-3 version compatibility */
1736 /* set scsi removeable (RMB) bit per ata bit */
1737 if (ata_id_removeable(args->id))
1742 memcpy(rbuf, hdr, sizeof(hdr));
1745 memcpy(&rbuf[8], "ATA ", 8);
1746 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1747 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1748 if (rbuf[32] == 0 || rbuf[32] == ' ')
1749 memcpy(&rbuf[32], "n/a ", 4);
1753 const u8 versions[] = {
1754 0x60, /* SAM-3 (no version claimed) */
1757 0x20, /* SBC-2 (no version claimed) */
1760 0x60 /* SPC-3 (no version claimed) */
1763 memcpy(rbuf + 59, versions, sizeof(versions));
1770 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1771 * @args: device IDENTIFY data / SCSI command of interest.
1772 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1773 * @buflen: Response buffer length.
1775 * Returns list of inquiry VPD pages available.
1778 * spin_lock_irqsave(host lock)
1781 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1782 unsigned int buflen)
1784 const u8 pages[] = {
1785 0x00, /* page 0x00, this page */
1786 0x80, /* page 0x80, unit serial no page */
1787 0x83 /* page 0x83, device ident page */
1789 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1792 memcpy(rbuf + 4, pages, sizeof(pages));
1798 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1799 * @args: device IDENTIFY data / SCSI command of interest.
1800 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1801 * @buflen: Response buffer length.
1803 * Returns ATA device serial number.
1806 * spin_lock_irqsave(host lock)
1809 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1810 unsigned int buflen)
1814 0x80, /* this page code */
1816 ATA_ID_SERNO_LEN, /* page len */
1818 memcpy(rbuf, hdr, sizeof(hdr));
1820 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1821 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1822 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1828 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1829 * @args: device IDENTIFY data / SCSI command of interest.
1830 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1831 * @buflen: Response buffer length.
1833 * Yields two logical unit device identification designators:
1834 * - vendor specific ASCII containing the ATA serial number
1835 * - SAT defined "t10 vendor id based" containing ASCII vendor
1836 * name ("ATA "), model and serial numbers.
1839 * spin_lock_irqsave(host lock)
1842 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1843 unsigned int buflen)
1846 const int sat_model_serial_desc_len = 68;
1848 rbuf[1] = 0x83; /* this page code */
1851 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1852 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1854 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1856 ata_id_string(args->id, (unsigned char *) rbuf + num,
1857 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1858 num += ATA_ID_SERNO_LEN;
1860 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1861 /* SAT defined lu model and serial numbers descriptor */
1862 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1865 rbuf[num + 3] = sat_model_serial_desc_len;
1867 memcpy(rbuf + num, "ATA ", 8);
1869 ata_id_string(args->id, (unsigned char *) rbuf + num,
1870 ATA_ID_PROD, ATA_ID_PROD_LEN);
1871 num += ATA_ID_PROD_LEN;
1872 ata_id_string(args->id, (unsigned char *) rbuf + num,
1873 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1874 num += ATA_ID_SERNO_LEN;
1876 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1881 * ata_scsiop_noop - Command handler that simply returns success.
1882 * @args: device IDENTIFY data / SCSI command of interest.
1883 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1884 * @buflen: Response buffer length.
1886 * No operation. Simply returns success to caller, to indicate
1887 * that the caller should successfully complete this SCSI command.
1890 * spin_lock_irqsave(host lock)
1893 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1894 unsigned int buflen)
1901 * ata_msense_push - Push data onto MODE SENSE data output buffer
1902 * @ptr_io: (input/output) Location to store more output data
1903 * @last: End of output data buffer
1904 * @buf: Pointer to BLOB being added to output buffer
1905 * @buflen: Length of BLOB
1907 * Store MODE SENSE data on an output buffer.
1913 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1914 const u8 *buf, unsigned int buflen)
1918 if ((ptr + buflen - 1) > last)
1921 memcpy(ptr, buf, buflen);
1929 * ata_msense_caching - Simulate MODE SENSE caching info page
1930 * @id: device IDENTIFY data
1931 * @ptr_io: (input/output) Location to store more output data
1932 * @last: End of output data buffer
1934 * Generate a caching info page, which conditionally indicates
1935 * write caching to the SCSI layer, depending on device
1942 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1945 u8 page[CACHE_MPAGE_LEN];
1947 memcpy(page, def_cache_mpage, sizeof(page));
1948 if (ata_id_wcache_enabled(id))
1949 page[2] |= (1 << 2); /* write cache enable */
1950 if (!ata_id_rahead_enabled(id))
1951 page[12] |= (1 << 5); /* disable read ahead */
1953 ata_msense_push(ptr_io, last, page, sizeof(page));
1954 return sizeof(page);
1958 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1959 * @dev: Device associated with this MODE SENSE command
1960 * @ptr_io: (input/output) Location to store more output data
1961 * @last: End of output data buffer
1963 * Generate a generic MODE SENSE control mode page.
1969 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1971 ata_msense_push(ptr_io, last, def_control_mpage,
1972 sizeof(def_control_mpage));
1973 return sizeof(def_control_mpage);
1977 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1978 * @dev: Device associated with this MODE SENSE command
1979 * @ptr_io: (input/output) Location to store more output data
1980 * @last: End of output data buffer
1982 * Generate a generic MODE SENSE r/w error recovery page.
1988 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1991 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1992 sizeof(def_rw_recovery_mpage));
1993 return sizeof(def_rw_recovery_mpage);
1997 * We can turn this into a real blacklist if it's needed, for now just
1998 * blacklist any Maxtor BANC1G10 revision firmware
2000 static int ata_dev_supports_fua(u16 *id)
2002 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2006 if (!ata_id_has_fua(id))
2009 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2010 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2012 if (strcmp(model, "Maxtor"))
2014 if (strcmp(fw, "BANC1G10"))
2017 return 0; /* blacklisted */
2021 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2022 * @args: device IDENTIFY data / SCSI command of interest.
2023 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2024 * @buflen: Response buffer length.
2026 * Simulate MODE SENSE commands. Assume this is invoked for direct
2027 * access devices (e.g. disks) only. There should be no block
2028 * descriptor for other device types.
2031 * spin_lock_irqsave(host lock)
2034 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2035 unsigned int buflen)
2037 struct ata_device *dev = args->dev;
2038 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2039 const u8 sat_blk_desc[] = {
2040 0, 0, 0, 0, /* number of blocks: sat unspecified */
2042 0, 0x2, 0x0 /* block length: 512 bytes */
2045 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2050 six_byte = (scsicmd[0] == MODE_SENSE);
2051 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2053 * LLBA bit in msense(10) ignored (compliant)
2056 page_control = scsicmd[2] >> 6;
2057 switch (page_control) {
2058 case 0: /* current */
2059 break; /* supported */
2061 goto saving_not_supp;
2062 case 1: /* changeable */
2063 case 2: /* defaults */
2069 output_len = 4 + (ebd ? 8 : 0);
2070 alloc_len = scsicmd[4];
2072 output_len = 8 + (ebd ? 8 : 0);
2073 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2075 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2077 p = rbuf + output_len;
2078 last = rbuf + minlen - 1;
2080 pg = scsicmd[2] & 0x3f;
2083 * No mode subpages supported (yet) but asking for _all_
2084 * subpages may be valid
2086 if (spg && (spg != ALL_SUB_MPAGES))
2090 case RW_RECOVERY_MPAGE:
2091 output_len += ata_msense_rw_recovery(&p, last);
2095 output_len += ata_msense_caching(args->id, &p, last);
2098 case CONTROL_MPAGE: {
2099 output_len += ata_msense_ctl_mode(&p, last);
2104 output_len += ata_msense_rw_recovery(&p, last);
2105 output_len += ata_msense_caching(args->id, &p, last);
2106 output_len += ata_msense_ctl_mode(&p, last);
2109 default: /* invalid page code */
2117 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2118 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2123 rbuf[0] = output_len;
2128 rbuf[3] = sizeof(sat_blk_desc);
2130 memcpy(rbuf + 4, sat_blk_desc,
2131 sizeof(sat_blk_desc));
2135 rbuf[0] = output_len >> 8;
2137 rbuf[1] = output_len;
2142 rbuf[7] = sizeof(sat_blk_desc);
2144 memcpy(rbuf + 8, sat_blk_desc,
2145 sizeof(sat_blk_desc));
2151 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2152 /* "Invalid field in cbd" */
2156 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2157 /* "Saving parameters not supported" */
2162 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2163 * @args: device IDENTIFY data / SCSI command of interest.
2164 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2165 * @buflen: Response buffer length.
2167 * Simulate READ CAPACITY commands.
2172 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2173 unsigned int buflen)
2175 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2179 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2180 if (last_lba >= 0xffffffffULL)
2181 last_lba = 0xffffffff;
2183 /* sector count, 32-bit */
2184 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2185 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2186 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2187 ATA_SCSI_RBUF_SET(3, last_lba);
2190 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2191 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2193 /* sector count, 64-bit */
2194 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2195 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2196 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2197 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2198 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2199 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2200 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2201 ATA_SCSI_RBUF_SET(7, last_lba);
2204 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2205 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2212 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2213 * @args: device IDENTIFY data / SCSI command of interest.
2214 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2215 * @buflen: Response buffer length.
2217 * Simulate REPORT LUNS command.
2220 * spin_lock_irqsave(host lock)
2223 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2224 unsigned int buflen)
2227 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2233 * ata_scsi_set_sense - Set SCSI sense data and status
2234 * @cmd: SCSI request to be handled
2235 * @sk: SCSI-defined sense key
2236 * @asc: SCSI-defined additional sense code
2237 * @ascq: SCSI-defined additional sense code qualifier
2239 * Helper function that builds a valid fixed format, current
2240 * response code and the given sense key (sk), additional sense
2241 * code (asc) and additional sense code qualifier (ascq) with
2242 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2243 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2249 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2251 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2253 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2254 cmd->sense_buffer[2] = sk;
2255 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2256 cmd->sense_buffer[12] = asc;
2257 cmd->sense_buffer[13] = ascq;
2261 * ata_scsi_badcmd - End a SCSI request with an error
2262 * @cmd: SCSI request to be handled
2263 * @done: SCSI command completion function
2264 * @asc: SCSI-defined additional sense code
2265 * @ascq: SCSI-defined additional sense code qualifier
2267 * Helper function that completes a SCSI command with
2268 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2269 * and the specified additional sense codes.
2272 * spin_lock_irqsave(host lock)
2275 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2278 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2283 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2285 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2286 /* FIXME: not quite right; we don't want the
2287 * translation of taskfile registers into
2288 * a sense descriptors, since that's only
2289 * correct for ATA, not ATAPI
2291 ata_gen_passthru_sense(qc);
2294 qc->scsidone(qc->scsicmd);
2298 /* is it pointless to prefer PIO for "safety reasons"? */
2299 static inline int ata_pio_use_silly(struct ata_port *ap)
2301 return (ap->flags & ATA_FLAG_PIO_DMA);
2304 static void atapi_request_sense(struct ata_queued_cmd *qc)
2306 struct ata_port *ap = qc->ap;
2307 struct scsi_cmnd *cmd = qc->scsicmd;
2309 DPRINTK("ATAPI request sense\n");
2311 /* FIXME: is this needed? */
2312 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2314 ap->ops->tf_read(ap, &qc->tf);
2316 /* fill these in, for the case where they are -not- overwritten */
2317 cmd->sense_buffer[0] = 0x70;
2318 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2322 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2323 qc->dma_dir = DMA_FROM_DEVICE;
2325 memset(&qc->cdb, 0, qc->dev->cdb_len);
2326 qc->cdb[0] = REQUEST_SENSE;
2327 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2329 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2330 qc->tf.command = ATA_CMD_PACKET;
2332 if (ata_pio_use_silly(ap)) {
2333 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2334 qc->tf.feature |= ATAPI_PKT_DMA;
2336 qc->tf.protocol = ATA_PROT_ATAPI;
2337 qc->tf.lbam = (8 * 1024) & 0xff;
2338 qc->tf.lbah = (8 * 1024) >> 8;
2340 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2342 qc->complete_fn = atapi_sense_complete;
2349 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2351 struct scsi_cmnd *cmd = qc->scsicmd;
2352 unsigned int err_mask = qc->err_mask;
2354 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2356 /* handle completion from new EH */
2357 if (unlikely(qc->ap->ops->error_handler &&
2358 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2360 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2361 /* FIXME: not quite right; we don't want the
2362 * translation of taskfile registers into a
2363 * sense descriptors, since that's only
2364 * correct for ATA, not ATAPI
2366 ata_gen_passthru_sense(qc);
2369 /* SCSI EH automatically locks door if sdev->locked is
2370 * set. Sometimes door lock request continues to
2371 * fail, for example, when no media is present. This
2372 * creates a loop - SCSI EH issues door lock which
2373 * fails and gets invoked again to acquire sense data
2374 * for the failed command.
2376 * If door lock fails, always clear sdev->locked to
2377 * avoid this infinite loop.
2379 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2380 qc->dev->sdev->locked = 0;
2382 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2388 /* successful completion or old EH failure path */
2389 if (unlikely(err_mask & AC_ERR_DEV)) {
2390 cmd->result = SAM_STAT_CHECK_CONDITION;
2391 atapi_request_sense(qc);
2393 } else if (unlikely(err_mask)) {
2394 /* FIXME: not quite right; we don't want the
2395 * translation of taskfile registers into
2396 * a sense descriptors, since that's only
2397 * correct for ATA, not ATAPI
2399 ata_gen_passthru_sense(qc);
2401 u8 *scsicmd = cmd->cmnd;
2403 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2405 unsigned int buflen;
2407 buflen = ata_scsi_rbuf_get(cmd, &buf);
2409 /* ATAPI devices typically report zero for their SCSI version,
2410 * and sometimes deviate from the spec WRT response data
2411 * format. If SCSI version is reported as zero like normal,
2412 * then we make the following fixups: 1) Fake MMC-5 version,
2413 * to indicate to the Linux scsi midlayer this is a modern
2414 * device. 2) Ensure response data format / ATAPI information
2415 * are always correct.
2422 ata_scsi_rbuf_put(cmd, buf);
2425 cmd->result = SAM_STAT_GOOD;
2432 * atapi_xlat - Initialize PACKET taskfile
2433 * @qc: command structure to be initialized
2436 * spin_lock_irqsave(host lock)
2439 * Zero on success, non-zero on failure.
2441 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2443 struct scsi_cmnd *scmd = qc->scsicmd;
2444 struct ata_device *dev = qc->dev;
2445 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2446 int nodata = (scmd->sc_data_direction == DMA_NONE);
2449 /* Check whether ATAPI DMA is safe */
2450 if (ata_check_atapi_dma(qc))
2453 memset(qc->cdb, 0, dev->cdb_len);
2454 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2456 qc->complete_fn = atapi_qc_complete;
2458 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2459 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2460 qc->tf.flags |= ATA_TFLAG_WRITE;
2461 DPRINTK("direction: write\n");
2464 qc->tf.command = ATA_CMD_PACKET;
2466 /* no data, or PIO data xfer */
2467 if (using_pio || nodata) {
2469 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2471 qc->tf.protocol = ATA_PROT_ATAPI;
2472 qc->tf.lbam = (8 * 1024) & 0xff;
2473 qc->tf.lbah = (8 * 1024) >> 8;
2478 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2479 qc->tf.feature |= ATAPI_PKT_DMA;
2481 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2482 /* some SATA bridges need us to indicate data xfer direction */
2483 qc->tf.feature |= ATAPI_DMADIR;
2486 qc->nbytes = scmd->request_bufflen;
2491 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2493 if (likely(id < ATA_MAX_DEVICES))
2494 return &ap->device[id];
2498 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2499 const struct scsi_device *scsidev)
2501 /* skip commands not addressed to targets we simulate */
2502 if (unlikely(scsidev->channel || scsidev->lun))
2505 return ata_find_dev(ap, scsidev->id);
2509 * ata_scsi_dev_enabled - determine if device is enabled
2512 * Determine if commands should be sent to the specified device.
2515 * spin_lock_irqsave(host lock)
2518 * 0 if commands are not allowed / 1 if commands are allowed
2521 static int ata_scsi_dev_enabled(struct ata_device *dev)
2523 if (unlikely(!ata_dev_enabled(dev)))
2526 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2527 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2528 ata_dev_printk(dev, KERN_WARNING,
2529 "WARNING: ATAPI is %s, device ignored.\n",
2530 atapi_enabled ? "not supported with this driver" : "disabled");
2539 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2540 * @ap: ATA port to which the device is attached
2541 * @scsidev: SCSI device from which we derive the ATA device
2543 * Given various information provided in struct scsi_cmnd,
2544 * map that onto an ATA bus, and using that mapping
2545 * determine which ata_device is associated with the
2546 * SCSI command to be sent.
2549 * spin_lock_irqsave(host lock)
2552 * Associated ATA device, or %NULL if not found.
2554 static struct ata_device *
2555 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2557 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2559 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2566 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2567 * @byte1: Byte 1 from pass-thru CDB.
2570 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2573 ata_scsi_map_proto(u8 byte1)
2575 switch((byte1 & 0x1e) >> 1) {
2576 case 3: /* Non-data */
2577 return ATA_PROT_NODATA;
2580 return ATA_PROT_DMA;
2582 case 4: /* PIO Data-in */
2583 case 5: /* PIO Data-out */
2584 return ATA_PROT_PIO;
2586 case 10: /* Device Reset */
2587 case 0: /* Hard Reset */
2589 case 2: /* Bus Idle */
2590 case 7: /* Packet */
2591 case 8: /* DMA Queued */
2592 case 9: /* Device Diagnostic */
2593 case 11: /* UDMA Data-in */
2594 case 12: /* UDMA Data-Out */
2595 case 13: /* FPDMA */
2596 default: /* Reserved */
2600 return ATA_PROT_UNKNOWN;
2604 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2605 * @qc: command structure to be initialized
2607 * Handles either 12 or 16-byte versions of the CDB.
2610 * Zero on success, non-zero on failure.
2612 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2614 struct ata_taskfile *tf = &(qc->tf);
2615 struct scsi_cmnd *scmd = qc->scsicmd;
2616 struct ata_device *dev = qc->dev;
2617 const u8 *cdb = scmd->cmnd;
2619 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2622 /* We may not issue DMA commands if no DMA mode is set */
2623 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2627 /* PIO multi not supported yet */
2631 * 12 and 16 byte CDBs use different offsets to
2632 * provide the various register values.
2634 if (cdb[0] == ATA_16) {
2636 * 16-byte CDB - may contain extended commands.
2638 * If that is the case, copy the upper byte register values.
2640 if (cdb[1] & 0x01) {
2641 tf->hob_feature = cdb[3];
2642 tf->hob_nsect = cdb[5];
2643 tf->hob_lbal = cdb[7];
2644 tf->hob_lbam = cdb[9];
2645 tf->hob_lbah = cdb[11];
2646 tf->flags |= ATA_TFLAG_LBA48;
2648 tf->flags &= ~ATA_TFLAG_LBA48;
2651 * Always copy low byte, device and command registers.
2653 tf->feature = cdb[4];
2658 tf->device = cdb[13];
2659 tf->command = cdb[14];
2662 * 12-byte CDB - incapable of extended commands.
2664 tf->flags &= ~ATA_TFLAG_LBA48;
2666 tf->feature = cdb[3];
2671 tf->device = cdb[8];
2672 tf->command = cdb[9];
2675 * If slave is possible, enforce correct master/slave bit
2677 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2678 tf->device = qc->dev->devno ?
2679 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2682 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2683 * SET_FEATURES - XFER MODE must be preceded/succeeded
2684 * by an update to hardware-specific registers for each
2685 * controller (i.e. the reason for ->set_piomode(),
2686 * ->set_dmamode(), and ->post_set_mode() hooks).
2688 if ((tf->command == ATA_CMD_SET_FEATURES)
2689 && (tf->feature == SETFEATURES_XFER))
2693 * Set flags so that all registers will be written,
2694 * and pass on write indication (used for PIO/DMA
2697 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2699 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2700 tf->flags |= ATA_TFLAG_WRITE;
2703 * Set transfer length.
2705 * TODO: find out if we need to do more here to
2706 * cover scatter/gather case.
2708 qc->nbytes = scmd->request_bufflen;
2710 /* request result TF */
2711 qc->flags |= ATA_QCFLAG_RESULT_TF;
2716 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2717 /* "Invalid field in cdb" */
2722 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2724 * @cmd: SCSI command opcode to consider
2726 * Look up the SCSI command given, and determine whether the
2727 * SCSI command is to be translated or simulated.
2730 * Pointer to translation function if possible, %NULL if not.
2733 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2743 return ata_scsi_rw_xlat;
2745 case SYNCHRONIZE_CACHE:
2746 if (ata_try_flush_cache(dev))
2747 return ata_scsi_flush_xlat;
2752 return ata_scsi_verify_xlat;
2756 return ata_scsi_pass_thru;
2759 return ata_scsi_start_stop_xlat;
2766 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2767 * @ap: ATA port to which the command was being sent
2768 * @cmd: SCSI command to dump
2770 * Prints the contents of a SCSI command via printk().
2773 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2774 struct scsi_cmnd *cmd)
2777 struct scsi_device *scsidev = cmd->device;
2778 u8 *scsicmd = cmd->cmnd;
2780 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2782 scsidev->channel, scsidev->id, scsidev->lun,
2783 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2784 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2789 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2790 void (*done)(struct scsi_cmnd *),
2791 struct ata_device *dev)
2795 if (unlikely(!scmd->cmd_len)) {
2796 ata_dev_printk(dev, KERN_WARNING, "WARNING: zero len CDB\n");
2797 scmd->result = DID_ERROR << 16;
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, scmd, done, xlat_func);
2809 ata_scsi_simulate(dev, scmd, done);
2811 rc = ata_scsi_translate(dev, scmd, 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 * @work: 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(struct work_struct *work)
3070 struct ata_port *ap =
3071 container_of(work, struct ata_port, hotplug_task.work);
3074 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3075 DPRINTK("ENTER/EXIT - unloading\n");
3081 /* unplug detached devices */
3082 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3083 struct ata_device *dev = &ap->device[i];
3084 unsigned long flags;
3086 if (!(dev->flags & ATA_DFLAG_DETACHED))
3089 spin_lock_irqsave(ap->lock, flags);
3090 dev->flags &= ~ATA_DFLAG_DETACHED;
3091 spin_unlock_irqrestore(ap->lock, flags);
3093 ata_scsi_remove_dev(dev);
3096 /* scan for new ones */
3097 ata_scsi_scan_host(ap);
3099 /* If we scanned while EH was in progress, scan would have
3100 * failed silently. Requeue if there are enabled but
3101 * unattached devices.
3103 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3104 struct ata_device *dev = &ap->device[i];
3105 if (ata_dev_enabled(dev) && !dev->sdev) {
3106 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3107 round_jiffies_relative(HZ));
3116 * ata_scsi_user_scan - indication for user-initiated bus scan
3117 * @shost: SCSI host to scan
3118 * @channel: Channel to scan
3122 * This function is called when user explicitly requests bus
3123 * scan. Set probe pending flag and invoke EH.
3126 * SCSI layer (we don't care)
3131 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3132 unsigned int id, unsigned int lun)
3134 struct ata_port *ap = ata_shost_to_port(shost);
3135 unsigned long flags;
3138 if (!ap->ops->error_handler)
3141 if ((channel != SCAN_WILD_CARD && channel != 0) ||
3142 (lun != SCAN_WILD_CARD && lun != 0))
3145 spin_lock_irqsave(ap->lock, flags);
3147 if (id == SCAN_WILD_CARD) {
3148 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
3149 ap->eh_info.action |= ATA_EH_SOFTRESET;
3151 struct ata_device *dev = ata_find_dev(ap, id);
3154 ap->eh_info.probe_mask |= 1 << dev->devno;
3155 ap->eh_info.action |= ATA_EH_SOFTRESET;
3156 ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
3162 ata_port_schedule_eh(ap);
3163 spin_unlock_irqrestore(ap->lock, flags);
3164 ata_port_wait_eh(ap);
3166 spin_unlock_irqrestore(ap->lock, flags);
3172 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3173 * @work: Pointer to ATA port to perform scsi_rescan_device()
3175 * After ATA pass thru (SAT) commands are executed successfully,
3176 * libata need to propagate the changes to SCSI layer. This
3177 * function must be executed from ata_aux_wq such that sdev
3178 * attach/detach don't race with rescan.
3181 * Kernel thread context (may sleep).
3183 void ata_scsi_dev_rescan(struct work_struct *work)
3185 struct ata_port *ap =
3186 container_of(work, struct ata_port, scsi_rescan_task);
3187 unsigned long flags;
3190 spin_lock_irqsave(ap->lock, flags);
3192 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3193 struct ata_device *dev = &ap->device[i];
3194 struct scsi_device *sdev = dev->sdev;
3196 if (!ata_dev_enabled(dev) || !sdev)
3198 if (scsi_device_get(sdev))
3201 spin_unlock_irqrestore(ap->lock, flags);
3202 scsi_rescan_device(&(sdev->sdev_gendev));
3203 scsi_device_put(sdev);
3204 spin_lock_irqsave(ap->lock, flags);
3207 spin_unlock_irqrestore(ap->lock, flags);
3211 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3212 * @host: ATA host container for all SAS ports
3213 * @port_info: Information from low-level host driver
3214 * @shost: SCSI host that the scsi device is attached to
3217 * PCI/etc. bus probe sem.
3220 * ata_port pointer on success / NULL on failure.
3223 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3224 struct ata_port_info *port_info,
3225 struct Scsi_Host *shost)
3227 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3228 struct ata_probe_ent *ent;
3233 ent = ata_probe_ent_alloc(host->dev, port_info);
3239 ata_port_init(ap, host, ent, 0);
3240 ap->lock = shost->host_lock;
3241 devm_kfree(host->dev, ent);
3244 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3247 * ata_sas_port_start - Set port up for dma.
3248 * @ap: Port to initialize
3250 * Called just after data structures for each port are
3251 * initialized. Allocates DMA pad.
3253 * May be used as the port_start() entry in ata_port_operations.
3256 * Inherited from caller.
3258 int ata_sas_port_start(struct ata_port *ap)
3260 return ata_pad_alloc(ap, ap->dev);
3262 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3265 * ata_port_stop - Undo ata_sas_port_start()
3266 * @ap: Port to shut down
3268 * Frees the DMA pad.
3270 * May be used as the port_stop() entry in ata_port_operations.
3273 * Inherited from caller.
3276 void ata_sas_port_stop(struct ata_port *ap)
3278 ata_pad_free(ap, ap->dev);
3280 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3283 * ata_sas_port_init - Initialize a SATA device
3284 * @ap: SATA port to initialize
3287 * PCI/etc. bus probe sem.
3290 * Zero on success, non-zero on error.
3293 int ata_sas_port_init(struct ata_port *ap)
3295 int rc = ap->ops->port_start(ap);
3298 rc = ata_bus_probe(ap);
3302 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3305 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3306 * @ap: SATA port to destroy
3310 void ata_sas_port_destroy(struct ata_port *ap)
3312 if (ap->ops->port_stop)
3313 ap->ops->port_stop(ap);
3316 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3319 * ata_sas_slave_configure - Default slave_config routine for libata devices
3320 * @sdev: SCSI device to configure
3321 * @ap: ATA port to which SCSI device is attached
3327 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3329 ata_scsi_sdev_config(sdev);
3330 ata_scsi_dev_config(sdev, ap->device);
3333 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3336 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3337 * @cmd: SCSI command to be sent
3338 * @done: Completion function, called when command is complete
3339 * @ap: ATA port to which the command is being sent
3342 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3346 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3347 struct ata_port *ap)
3351 ata_scsi_dump_cdb(ap, cmd);
3353 if (likely(ata_scsi_dev_enabled(ap->device)))
3354 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
3356 cmd->result = (DID_BAD_TARGET << 16);
3361 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);