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 ");
514 * ata_scsi_device_suspend - suspend ATA device associated with sdev
515 * @sdev: the SCSI device to suspend
516 * @mesg: target power management message
518 * Request suspend EH action on the ATA device associated with
519 * @sdev and wait for the operation to complete.
522 * Kernel thread context (may sleep).
525 * 0 on success, -errno otherwise.
527 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
529 struct ata_port *ap = ata_shost_to_port(sdev->host);
530 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
538 spin_lock_irqsave(ap->lock, flags);
540 /* wait for the previous resume to complete */
541 while (dev->flags & ATA_DFLAG_SUSPENDED) {
542 spin_unlock_irqrestore(ap->lock, flags);
543 ata_port_wait_eh(ap);
544 spin_lock_irqsave(ap->lock, flags);
547 /* if @sdev is already detached, nothing to do */
548 if (sdev->sdev_state == SDEV_OFFLINE ||
549 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
552 /* request suspend */
553 action = ATA_EH_SUSPEND;
554 if (mesg.event != PM_EVENT_SUSPEND)
555 action |= ATA_EH_PM_FREEZE;
556 ap->eh_info.dev_action[dev->devno] |= action;
557 ap->eh_info.flags |= ATA_EHI_QUIET;
558 ata_port_schedule_eh(ap);
560 spin_unlock_irqrestore(ap->lock, flags);
562 /* wait for EH to do the job */
563 ata_port_wait_eh(ap);
565 spin_lock_irqsave(ap->lock, flags);
567 /* If @sdev is still attached but the associated ATA device
568 * isn't suspended, the operation failed.
570 if (sdev->sdev_state != SDEV_OFFLINE &&
571 sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
572 !(dev->flags & ATA_DFLAG_SUSPENDED))
576 spin_unlock_irqrestore(ap->lock, flags);
579 sdev->sdev_gendev.power.power_state = mesg;
584 * ata_scsi_device_resume - resume ATA device associated with sdev
585 * @sdev: the SCSI device to resume
587 * Request resume EH action on the ATA device associated with
588 * @sdev and return immediately. This enables parallel
589 * wakeup/spinup of devices.
592 * Kernel thread context (may sleep).
597 int ata_scsi_device_resume(struct scsi_device *sdev)
599 struct ata_port *ap = ata_shost_to_port(sdev->host);
600 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
601 struct ata_eh_info *ehi = &ap->eh_info;
608 spin_lock_irqsave(ap->lock, flags);
610 /* if @sdev is already detached, nothing to do */
611 if (sdev->sdev_state == SDEV_OFFLINE ||
612 sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
616 action = ATA_EH_RESUME;
617 if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
618 __ata_ehi_hotplugged(ehi);
620 action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
621 ehi->dev_action[dev->devno] |= action;
623 /* We don't want autopsy and verbose EH messages. Disable
624 * those if we're the only device on this link.
626 if (ata_port_max_devices(ap) == 1)
627 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
629 ata_port_schedule_eh(ap);
632 spin_unlock_irqrestore(ap->lock, flags);
634 sdev->sdev_gendev.power.power_state = PMSG_ON;
639 * ata_to_sense_error - convert ATA error to SCSI error
640 * @id: ATA device number
641 * @drv_stat: value contained in ATA status register
642 * @drv_err: value contained in ATA error register
643 * @sk: the sense key we'll fill out
644 * @asc: the additional sense code we'll fill out
645 * @ascq: the additional sense code qualifier we'll fill out
646 * @verbose: be verbose
648 * Converts an ATA error into a SCSI error. Fill out pointers to
649 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
650 * format sense blocks.
653 * spin_lock_irqsave(host lock)
655 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
656 u8 *asc, u8 *ascq, int verbose)
660 /* Based on the 3ware driver translation table */
661 static const unsigned char sense_table[][4] = {
663 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
665 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
667 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
668 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
669 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
670 /* MC|ID|ABRT|TRK0|MARK */
671 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
673 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
674 /* Bad address mark */
675 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
677 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
679 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
680 /* Media change request */
681 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
683 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
685 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
687 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
688 /* BBD - block marked bad */
689 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
690 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
692 static const unsigned char stat_table[][4] = {
693 /* Must be first because BUSY means no other bits valid */
694 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
695 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
696 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
697 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
698 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
702 * Is this an error we can process/parse
704 if (drv_stat & ATA_BUSY) {
705 drv_err = 0; /* Ignore the err bits, they're invalid */
709 /* Look for drv_err */
710 for (i = 0; sense_table[i][0] != 0xFF; i++) {
711 /* Look for best matches first */
712 if ((sense_table[i][0] & drv_err) ==
714 *sk = sense_table[i][1];
715 *asc = sense_table[i][2];
716 *ascq = sense_table[i][3];
720 /* No immediate match */
722 printk(KERN_WARNING "ata%u: no sense translation for "
723 "error 0x%02x\n", id, drv_err);
726 /* Fall back to interpreting status bits */
727 for (i = 0; stat_table[i][0] != 0xFF; i++) {
728 if (stat_table[i][0] & drv_stat) {
729 *sk = stat_table[i][1];
730 *asc = stat_table[i][2];
731 *ascq = stat_table[i][3];
735 /* No error? Undecoded? */
737 printk(KERN_WARNING "ata%u: no sense translation for "
738 "status: 0x%02x\n", id, drv_stat);
740 /* We need a sensible error return here, which is tricky, and one
741 that won't cause people to do things like return a disk wrongly */
742 *sk = ABORTED_COMMAND;
748 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
749 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
750 id, drv_stat, drv_err, *sk, *asc, *ascq);
755 * ata_gen_passthru_sense - Generate check condition sense block.
756 * @qc: Command that completed.
758 * This function is specific to the ATA descriptor format sense
759 * block specified for the ATA pass through commands. Regardless
760 * of whether the command errored or not, return a sense
761 * block. Copy all controller registers into the sense
762 * block. Clear sense key, ASC & ASCQ if there is no error.
767 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
769 struct scsi_cmnd *cmd = qc->scsicmd;
770 struct ata_taskfile *tf = &qc->result_tf;
771 unsigned char *sb = cmd->sense_buffer;
772 unsigned char *desc = sb + 8;
773 int verbose = qc->ap->ops->error_handler == NULL;
775 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
777 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
780 * Use ata_to_sense_error() to map status register bits
781 * onto sense key, asc & ascq.
784 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
785 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
786 &sb[1], &sb[2], &sb[3], verbose);
791 * Sense data is current and format is descriptor.
797 /* set length of additional sense data */
802 * Copy registers into sense buffer.
805 desc[3] = tf->feature; /* == error reg */
810 desc[12] = tf->device;
811 desc[13] = tf->command; /* == status reg */
814 * Fill in Extend bit, and the high order bytes
817 if (tf->flags & ATA_TFLAG_LBA48) {
819 desc[4] = tf->hob_nsect;
820 desc[6] = tf->hob_lbal;
821 desc[8] = tf->hob_lbam;
822 desc[10] = tf->hob_lbah;
827 * ata_gen_ata_sense - generate a SCSI fixed sense block
828 * @qc: Command that we are erroring out
830 * Generate sense block for a failed ATA command @qc. Descriptor
831 * format is used to accomodate LBA48 block address.
836 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
838 struct ata_device *dev = qc->dev;
839 struct scsi_cmnd *cmd = qc->scsicmd;
840 struct ata_taskfile *tf = &qc->result_tf;
841 unsigned char *sb = cmd->sense_buffer;
842 unsigned char *desc = sb + 8;
843 int verbose = qc->ap->ops->error_handler == NULL;
846 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
848 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
850 /* sense data is current and format is descriptor */
853 /* Use ata_to_sense_error() to map status register bits
854 * onto sense key, asc & ascq.
857 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
858 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
859 &sb[1], &sb[2], &sb[3], verbose);
863 block = ata_tf_read_block(&qc->result_tf, dev);
865 /* information sense data descriptor */
870 desc[2] |= 0x80; /* valid */
871 desc[6] = block >> 40;
872 desc[7] = block >> 32;
873 desc[8] = block >> 24;
874 desc[9] = block >> 16;
875 desc[10] = block >> 8;
879 static void ata_scsi_sdev_config(struct scsi_device *sdev)
881 sdev->use_10_for_rw = 1;
882 sdev->use_10_for_ms = 1;
885 static void ata_scsi_dev_config(struct scsi_device *sdev,
886 struct ata_device *dev)
888 /* configure max sectors */
889 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
891 /* SATA DMA transfers must be multiples of 4 byte, so
892 * we need to pad ATAPI transfers using an extra sg.
893 * Decrement max hw segments accordingly.
895 if (dev->class == ATA_DEV_ATAPI) {
896 request_queue_t *q = sdev->request_queue;
897 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
900 if (dev->flags & ATA_DFLAG_NCQ) {
903 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
904 depth = min(ATA_MAX_QUEUE - 1, depth);
905 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
910 * ata_scsi_slave_config - Set SCSI device attributes
911 * @sdev: SCSI device to examine
913 * This is called before we actually start reading
914 * and writing to the device, to configure certain
915 * SCSI mid-layer behaviors.
918 * Defined by SCSI layer. We don't really care.
921 int ata_scsi_slave_config(struct scsi_device *sdev)
923 struct ata_port *ap = ata_shost_to_port(sdev->host);
924 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
926 ata_scsi_sdev_config(sdev);
928 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
931 ata_scsi_dev_config(sdev, dev);
933 return 0; /* scsi layer doesn't check return value, sigh */
937 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
938 * @sdev: SCSI device to be destroyed
940 * @sdev is about to be destroyed for hot/warm unplugging. If
941 * this unplugging was initiated by libata as indicated by NULL
942 * dev->sdev, this function doesn't have to do anything.
943 * Otherwise, SCSI layer initiated warm-unplug is in progress.
944 * Clear dev->sdev, schedule the device for ATA detach and invoke
948 * Defined by SCSI layer. We don't really care.
950 void ata_scsi_slave_destroy(struct scsi_device *sdev)
952 struct ata_port *ap = ata_shost_to_port(sdev->host);
954 struct ata_device *dev;
956 if (!ap->ops->error_handler)
959 spin_lock_irqsave(ap->lock, flags);
960 dev = __ata_scsi_find_dev(ap, sdev);
961 if (dev && dev->sdev) {
962 /* SCSI device already in CANCEL state, no need to offline it */
964 dev->flags |= ATA_DFLAG_DETACH;
965 ata_port_schedule_eh(ap);
967 spin_unlock_irqrestore(ap->lock, flags);
971 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
972 * @sdev: SCSI device to configure queue depth for
973 * @queue_depth: new queue depth
975 * This is libata standard hostt->change_queue_depth callback.
976 * SCSI will call into this callback when user tries to set queue
980 * SCSI layer (we don't care)
983 * Newly configured queue depth.
985 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
987 struct ata_port *ap = ata_shost_to_port(sdev->host);
988 struct ata_device *dev;
991 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
992 return sdev->queue_depth;
994 dev = ata_scsi_find_dev(ap, sdev);
995 if (!dev || !ata_dev_enabled(dev))
996 return sdev->queue_depth;
999 spin_lock_irqsave(ap->lock, flags);
1000 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1001 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1002 dev->flags |= ATA_DFLAG_NCQ_OFF;
1005 spin_unlock_irqrestore(ap->lock, flags);
1007 /* limit and apply queue depth */
1008 queue_depth = min(queue_depth, sdev->host->can_queue);
1009 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1010 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1012 if (sdev->queue_depth == queue_depth)
1015 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1020 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1021 * @qc: Storage for translated ATA taskfile
1023 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1024 * (to start). Perhaps these commands should be preceded by
1025 * CHECK POWER MODE to see what power mode the device is already in.
1026 * [See SAT revision 5 at www.t10.org]
1029 * spin_lock_irqsave(host lock)
1032 * Zero on success, non-zero on error.
1034 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1036 struct scsi_cmnd *scmd = qc->scsicmd;
1037 struct ata_taskfile *tf = &qc->tf;
1038 const u8 *cdb = scmd->cmnd;
1040 if (scmd->cmd_len < 5)
1043 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1044 tf->protocol = ATA_PROT_NODATA;
1046 ; /* ignore IMMED bit, violates sat-r05 */
1049 goto invalid_fld; /* LOEJ bit set not supported */
1050 if (((cdb[4] >> 4) & 0xf) != 0)
1051 goto invalid_fld; /* power conditions not supported */
1053 tf->nsect = 1; /* 1 sector, lba=0 */
1055 if (qc->dev->flags & ATA_DFLAG_LBA) {
1056 tf->flags |= ATA_TFLAG_LBA;
1061 tf->device |= ATA_LBA;
1064 tf->lbal = 0x1; /* sect */
1065 tf->lbam = 0x0; /* cyl low */
1066 tf->lbah = 0x0; /* cyl high */
1069 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1071 /* Issue ATA STANDBY IMMEDIATE command */
1072 tf->command = ATA_CMD_STANDBYNOW1;
1075 * Standby and Idle condition timers could be implemented but that
1076 * would require libata to implement the Power condition mode page
1077 * and allow the user to change it. Changing mode pages requires
1078 * MODE SELECT to be implemented.
1084 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1085 /* "Invalid field in cbd" */
1091 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1092 * @qc: Storage for translated ATA taskfile
1094 * Sets up an ATA taskfile to issue FLUSH CACHE or
1098 * spin_lock_irqsave(host lock)
1101 * Zero on success, non-zero on error.
1103 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1105 struct ata_taskfile *tf = &qc->tf;
1107 tf->flags |= ATA_TFLAG_DEVICE;
1108 tf->protocol = ATA_PROT_NODATA;
1110 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1111 tf->command = ATA_CMD_FLUSH_EXT;
1113 tf->command = ATA_CMD_FLUSH;
1119 * scsi_6_lba_len - Get LBA and transfer length
1120 * @cdb: SCSI command to translate
1122 * Calculate LBA and transfer length for 6-byte commands.
1126 * @plen: the transfer length
1128 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1133 VPRINTK("six-byte command\n");
1135 lba |= ((u64)cdb[2]) << 8;
1136 lba |= ((u64)cdb[3]);
1138 len |= ((u32)cdb[4]);
1145 * scsi_10_lba_len - Get LBA and transfer length
1146 * @cdb: SCSI command to translate
1148 * Calculate LBA and transfer length for 10-byte commands.
1152 * @plen: the transfer length
1154 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1159 VPRINTK("ten-byte command\n");
1161 lba |= ((u64)cdb[2]) << 24;
1162 lba |= ((u64)cdb[3]) << 16;
1163 lba |= ((u64)cdb[4]) << 8;
1164 lba |= ((u64)cdb[5]);
1166 len |= ((u32)cdb[7]) << 8;
1167 len |= ((u32)cdb[8]);
1174 * scsi_16_lba_len - Get LBA and transfer length
1175 * @cdb: SCSI command to translate
1177 * Calculate LBA and transfer length for 16-byte commands.
1181 * @plen: the transfer length
1183 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1188 VPRINTK("sixteen-byte command\n");
1190 lba |= ((u64)cdb[2]) << 56;
1191 lba |= ((u64)cdb[3]) << 48;
1192 lba |= ((u64)cdb[4]) << 40;
1193 lba |= ((u64)cdb[5]) << 32;
1194 lba |= ((u64)cdb[6]) << 24;
1195 lba |= ((u64)cdb[7]) << 16;
1196 lba |= ((u64)cdb[8]) << 8;
1197 lba |= ((u64)cdb[9]);
1199 len |= ((u32)cdb[10]) << 24;
1200 len |= ((u32)cdb[11]) << 16;
1201 len |= ((u32)cdb[12]) << 8;
1202 len |= ((u32)cdb[13]);
1209 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1210 * @qc: Storage for translated ATA taskfile
1212 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1215 * spin_lock_irqsave(host lock)
1218 * Zero on success, non-zero on error.
1220 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1222 struct scsi_cmnd *scmd = qc->scsicmd;
1223 struct ata_taskfile *tf = &qc->tf;
1224 struct ata_device *dev = qc->dev;
1225 u64 dev_sectors = qc->dev->n_sectors;
1226 const u8 *cdb = scmd->cmnd;
1230 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1231 tf->protocol = ATA_PROT_NODATA;
1233 if (cdb[0] == VERIFY) {
1234 if (scmd->cmd_len < 10)
1236 scsi_10_lba_len(cdb, &block, &n_block);
1237 } else if (cdb[0] == VERIFY_16) {
1238 if (scmd->cmd_len < 16)
1240 scsi_16_lba_len(cdb, &block, &n_block);
1246 if (block >= dev_sectors)
1248 if ((block + n_block) > dev_sectors)
1251 if (dev->flags & ATA_DFLAG_LBA) {
1252 tf->flags |= ATA_TFLAG_LBA;
1254 if (lba_28_ok(block, n_block)) {
1256 tf->command = ATA_CMD_VERIFY;
1257 tf->device |= (block >> 24) & 0xf;
1258 } else if (lba_48_ok(block, n_block)) {
1259 if (!(dev->flags & ATA_DFLAG_LBA48))
1263 tf->flags |= ATA_TFLAG_LBA48;
1264 tf->command = ATA_CMD_VERIFY_EXT;
1266 tf->hob_nsect = (n_block >> 8) & 0xff;
1268 tf->hob_lbah = (block >> 40) & 0xff;
1269 tf->hob_lbam = (block >> 32) & 0xff;
1270 tf->hob_lbal = (block >> 24) & 0xff;
1272 /* request too large even for LBA48 */
1275 tf->nsect = n_block & 0xff;
1277 tf->lbah = (block >> 16) & 0xff;
1278 tf->lbam = (block >> 8) & 0xff;
1279 tf->lbal = block & 0xff;
1281 tf->device |= ATA_LBA;
1284 u32 sect, head, cyl, track;
1286 if (!lba_28_ok(block, n_block))
1289 /* Convert LBA to CHS */
1290 track = (u32)block / dev->sectors;
1291 cyl = track / dev->heads;
1292 head = track % dev->heads;
1293 sect = (u32)block % dev->sectors + 1;
1295 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1296 (u32)block, track, cyl, head, sect);
1298 /* Check whether the converted CHS can fit.
1302 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1305 tf->command = ATA_CMD_VERIFY;
1306 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1309 tf->lbah = cyl >> 8;
1316 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1317 /* "Invalid field in cbd" */
1321 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1322 /* "Logical Block Address out of range" */
1326 scmd->result = SAM_STAT_GOOD;
1331 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1332 * @qc: Storage for translated ATA taskfile
1334 * Converts any of six SCSI read/write commands into the
1335 * ATA counterpart, including starting sector (LBA),
1336 * sector count, and taking into account the device's LBA48
1339 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1340 * %WRITE_16 are currently supported.
1343 * spin_lock_irqsave(host lock)
1346 * Zero on success, non-zero on error.
1348 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1350 struct scsi_cmnd *scmd = qc->scsicmd;
1351 const u8 *cdb = scmd->cmnd;
1352 unsigned int tf_flags = 0;
1357 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1358 tf_flags |= ATA_TFLAG_WRITE;
1360 /* Calculate the SCSI LBA, transfer length and FUA. */
1364 if (unlikely(scmd->cmd_len < 10))
1366 scsi_10_lba_len(cdb, &block, &n_block);
1367 if (unlikely(cdb[1] & (1 << 3)))
1368 tf_flags |= ATA_TFLAG_FUA;
1372 if (unlikely(scmd->cmd_len < 6))
1374 scsi_6_lba_len(cdb, &block, &n_block);
1376 /* for 6-byte r/w commands, transfer length 0
1377 * means 256 blocks of data, not 0 block.
1384 if (unlikely(scmd->cmd_len < 16))
1386 scsi_16_lba_len(cdb, &block, &n_block);
1387 if (unlikely(cdb[1] & (1 << 3)))
1388 tf_flags |= ATA_TFLAG_FUA;
1391 DPRINTK("no-byte command\n");
1395 /* Check and compose ATA command */
1397 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1398 * length 0 means transfer 0 block of data.
1399 * However, for ATA R/W commands, sector count 0 means
1400 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1402 * WARNING: one or two older ATA drives treat 0 as 0...
1406 qc->flags |= ATA_QCFLAG_IO;
1407 qc->nbytes = n_block * ATA_SECT_SIZE;
1409 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1411 if (likely(rc == 0))
1416 /* treat all other errors as -EINVAL, fall through */
1418 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1419 /* "Invalid field in cbd" */
1423 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1424 /* "Logical Block Address out of range" */
1428 scmd->result = SAM_STAT_GOOD;
1432 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1434 struct ata_port *ap = qc->ap;
1435 struct scsi_cmnd *cmd = qc->scsicmd;
1436 u8 *cdb = cmd->cmnd;
1437 int need_sense = (qc->err_mask != 0);
1439 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1440 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1443 if (ap->ops->error_handler &&
1444 !need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
1445 ((qc->tf.feature == SETFEATURES_WC_ON) ||
1446 (qc->tf.feature == SETFEATURES_WC_OFF))) {
1447 ap->eh_info.action |= ATA_EH_REVALIDATE;
1448 ata_port_schedule_eh(ap);
1451 /* For ATA pass thru (SAT) commands, generate a sense block if
1452 * user mandated it or if there's an error. Note that if we
1453 * generate because the user forced us to, a check condition
1454 * is generated and the ATA register values are returned
1455 * whether the command completed successfully or not. If there
1456 * was no error, SK, ASC and ASCQ will all be zero.
1458 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1459 ((cdb[2] & 0x20) || need_sense)) {
1460 ata_gen_passthru_sense(qc);
1463 cmd->result = SAM_STAT_GOOD;
1465 /* TODO: decide which descriptor format to use
1466 * for 48b LBA devices and call that here
1467 * instead of the fixed desc, which is only
1468 * good for smaller LBA (and maybe CHS?)
1471 ata_gen_ata_sense(qc);
1475 if (need_sense && !ap->ops->error_handler)
1476 ata_dump_status(ap->print_id, &qc->result_tf);
1484 * ata_scmd_need_defer - Check whether we need to defer scmd
1485 * @dev: ATA device to which the command is addressed
1486 * @is_io: Is the command IO (and thus possibly NCQ)?
1488 * NCQ and non-NCQ commands cannot run together. As upper layer
1489 * only knows the queue depth, we are responsible for maintaining
1490 * exclusion. This function checks whether a new command can be
1494 * spin_lock_irqsave(host lock)
1497 * 1 if deferring is needed, 0 otherwise.
1499 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1501 struct ata_port *ap = dev->ap;
1502 int is_ncq = is_io && ata_ncq_enabled(dev);
1505 if (!ata_tag_valid(ap->active_tag))
1508 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1515 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1516 * @dev: ATA device to which the command is addressed
1517 * @cmd: SCSI command to execute
1518 * @done: SCSI command completion function
1519 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1521 * Our ->queuecommand() function has decided that the SCSI
1522 * command issued can be directly translated into an ATA
1523 * command, rather than handled internally.
1525 * This function sets up an ata_queued_cmd structure for the
1526 * SCSI command, and sends that ata_queued_cmd to the hardware.
1528 * The xlat_func argument (actor) returns 0 if ready to execute
1529 * ATA command, else 1 to finish translation. If 1 is returned
1530 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1531 * to be set reflecting an error condition or clean (early)
1535 * spin_lock_irqsave(host lock)
1538 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1539 * needs to be deferred.
1541 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1542 void (*done)(struct scsi_cmnd *),
1543 ata_xlat_func_t xlat_func)
1545 struct ata_queued_cmd *qc;
1546 int is_io = xlat_func == ata_scsi_rw_xlat;
1550 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1553 qc = ata_scsi_qc_new(dev, cmd, done);
1557 /* data is present; dma-map it */
1558 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1559 cmd->sc_data_direction == DMA_TO_DEVICE) {
1560 if (unlikely(cmd->request_bufflen < 1)) {
1561 ata_dev_printk(dev, KERN_WARNING,
1562 "WARNING: zero len r/w req\n");
1567 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1569 ata_sg_init_one(qc, cmd->request_buffer,
1570 cmd->request_bufflen);
1572 qc->dma_dir = cmd->sc_data_direction;
1575 qc->complete_fn = ata_scsi_qc_complete;
1580 /* select device, send command to hardware */
1589 DPRINTK("EXIT - early finish (good or error)\n");
1594 cmd->result = (DID_ERROR << 16);
1597 DPRINTK("EXIT - internal\n");
1601 DPRINTK("EXIT - defer\n");
1602 return SCSI_MLQUEUE_DEVICE_BUSY;
1606 * ata_scsi_rbuf_get - Map response buffer.
1607 * @cmd: SCSI command containing buffer to be mapped.
1608 * @buf_out: Pointer to mapped area.
1610 * Maps buffer contained within SCSI command @cmd.
1613 * spin_lock_irqsave(host lock)
1616 * Length of response buffer.
1619 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1622 unsigned int buflen;
1625 struct scatterlist *sg;
1627 sg = (struct scatterlist *) cmd->request_buffer;
1628 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1629 buflen = sg->length;
1631 buf = cmd->request_buffer;
1632 buflen = cmd->request_bufflen;
1640 * ata_scsi_rbuf_put - Unmap response buffer.
1641 * @cmd: SCSI command containing buffer to be unmapped.
1642 * @buf: buffer to unmap
1644 * Unmaps response buffer contained within @cmd.
1647 * spin_lock_irqsave(host lock)
1650 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1653 struct scatterlist *sg;
1655 sg = (struct scatterlist *) cmd->request_buffer;
1656 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1661 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1662 * @args: device IDENTIFY data / SCSI command of interest.
1663 * @actor: Callback hook for desired SCSI command simulator
1665 * Takes care of the hard work of simulating a SCSI command...
1666 * Mapping the response buffer, calling the command's handler,
1667 * and handling the handler's return value. This return value
1668 * indicates whether the handler wishes the SCSI command to be
1669 * completed successfully (0), or not (in which case cmd->result
1670 * and sense buffer are assumed to be set).
1673 * spin_lock_irqsave(host lock)
1676 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1677 unsigned int (*actor) (struct ata_scsi_args *args,
1678 u8 *rbuf, unsigned int buflen))
1681 unsigned int buflen, rc;
1682 struct scsi_cmnd *cmd = args->cmd;
1684 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1685 memset(rbuf, 0, buflen);
1686 rc = actor(args, rbuf, buflen);
1687 ata_scsi_rbuf_put(cmd, rbuf);
1690 cmd->result = SAM_STAT_GOOD;
1695 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1696 * @idx: byte index into SCSI response buffer
1697 * @val: value to set
1699 * To be used by SCSI command simulator functions. This macros
1700 * expects two local variables, u8 *rbuf and unsigned int buflen,
1706 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1707 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1711 * ata_scsiop_inq_std - Simulate INQUIRY command
1712 * @args: device IDENTIFY data / SCSI command of interest.
1713 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1714 * @buflen: Response buffer length.
1716 * Returns standard device identification data associated
1717 * with non-VPD INQUIRY command output.
1720 * spin_lock_irqsave(host lock)
1723 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1724 unsigned int buflen)
1729 0x5, /* claim SPC-3 version compatibility */
1734 /* set scsi removeable (RMB) bit per ata bit */
1735 if (ata_id_removeable(args->id))
1740 memcpy(rbuf, hdr, sizeof(hdr));
1743 memcpy(&rbuf[8], "ATA ", 8);
1744 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1745 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1746 if (rbuf[32] == 0 || rbuf[32] == ' ')
1747 memcpy(&rbuf[32], "n/a ", 4);
1751 const u8 versions[] = {
1752 0x60, /* SAM-3 (no version claimed) */
1755 0x20, /* SBC-2 (no version claimed) */
1758 0x60 /* SPC-3 (no version claimed) */
1761 memcpy(rbuf + 59, versions, sizeof(versions));
1768 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1769 * @args: device IDENTIFY data / SCSI command of interest.
1770 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1771 * @buflen: Response buffer length.
1773 * Returns list of inquiry VPD pages available.
1776 * spin_lock_irqsave(host lock)
1779 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1780 unsigned int buflen)
1782 const u8 pages[] = {
1783 0x00, /* page 0x00, this page */
1784 0x80, /* page 0x80, unit serial no page */
1785 0x83 /* page 0x83, device ident page */
1787 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1790 memcpy(rbuf + 4, pages, sizeof(pages));
1796 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1797 * @args: device IDENTIFY data / SCSI command of interest.
1798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1799 * @buflen: Response buffer length.
1801 * Returns ATA device serial number.
1804 * spin_lock_irqsave(host lock)
1807 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1808 unsigned int buflen)
1812 0x80, /* this page code */
1814 ATA_ID_SERNO_LEN, /* page len */
1816 memcpy(rbuf, hdr, sizeof(hdr));
1818 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1819 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1820 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1826 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1827 * @args: device IDENTIFY data / SCSI command of interest.
1828 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1829 * @buflen: Response buffer length.
1831 * Yields two logical unit device identification designators:
1832 * - vendor specific ASCII containing the ATA serial number
1833 * - SAT defined "t10 vendor id based" containing ASCII vendor
1834 * name ("ATA "), model and serial numbers.
1837 * spin_lock_irqsave(host lock)
1840 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1841 unsigned int buflen)
1844 const int sat_model_serial_desc_len = 68;
1846 rbuf[1] = 0x83; /* this page code */
1849 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1850 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1852 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1854 ata_id_string(args->id, (unsigned char *) rbuf + num,
1855 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1856 num += ATA_ID_SERNO_LEN;
1858 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1859 /* SAT defined lu model and serial numbers descriptor */
1860 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1863 rbuf[num + 3] = sat_model_serial_desc_len;
1865 memcpy(rbuf + num, "ATA ", 8);
1867 ata_id_string(args->id, (unsigned char *) rbuf + num,
1868 ATA_ID_PROD, ATA_ID_PROD_LEN);
1869 num += ATA_ID_PROD_LEN;
1870 ata_id_string(args->id, (unsigned char *) rbuf + num,
1871 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1872 num += ATA_ID_SERNO_LEN;
1874 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1879 * ata_scsiop_noop - Command handler that simply returns success.
1880 * @args: device IDENTIFY data / SCSI command of interest.
1881 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1882 * @buflen: Response buffer length.
1884 * No operation. Simply returns success to caller, to indicate
1885 * that the caller should successfully complete this SCSI command.
1888 * spin_lock_irqsave(host lock)
1891 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1892 unsigned int buflen)
1899 * ata_msense_push - Push data onto MODE SENSE data output buffer
1900 * @ptr_io: (input/output) Location to store more output data
1901 * @last: End of output data buffer
1902 * @buf: Pointer to BLOB being added to output buffer
1903 * @buflen: Length of BLOB
1905 * Store MODE SENSE data on an output buffer.
1911 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1912 const u8 *buf, unsigned int buflen)
1916 if ((ptr + buflen - 1) > last)
1919 memcpy(ptr, buf, buflen);
1927 * ata_msense_caching - Simulate MODE SENSE caching info page
1928 * @id: device IDENTIFY data
1929 * @ptr_io: (input/output) Location to store more output data
1930 * @last: End of output data buffer
1932 * Generate a caching info page, which conditionally indicates
1933 * write caching to the SCSI layer, depending on device
1940 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1943 u8 page[CACHE_MPAGE_LEN];
1945 memcpy(page, def_cache_mpage, sizeof(page));
1946 if (ata_id_wcache_enabled(id))
1947 page[2] |= (1 << 2); /* write cache enable */
1948 if (!ata_id_rahead_enabled(id))
1949 page[12] |= (1 << 5); /* disable read ahead */
1951 ata_msense_push(ptr_io, last, page, sizeof(page));
1952 return sizeof(page);
1956 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1957 * @dev: Device associated with this MODE SENSE command
1958 * @ptr_io: (input/output) Location to store more output data
1959 * @last: End of output data buffer
1961 * Generate a generic MODE SENSE control mode page.
1967 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1969 ata_msense_push(ptr_io, last, def_control_mpage,
1970 sizeof(def_control_mpage));
1971 return sizeof(def_control_mpage);
1975 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1976 * @dev: Device associated with this MODE SENSE command
1977 * @ptr_io: (input/output) Location to store more output data
1978 * @last: End of output data buffer
1980 * Generate a generic MODE SENSE r/w error recovery page.
1986 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1989 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1990 sizeof(def_rw_recovery_mpage));
1991 return sizeof(def_rw_recovery_mpage);
1995 * We can turn this into a real blacklist if it's needed, for now just
1996 * blacklist any Maxtor BANC1G10 revision firmware
1998 static int ata_dev_supports_fua(u16 *id)
2000 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2004 if (!ata_id_has_fua(id))
2007 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2008 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2010 if (strcmp(model, "Maxtor"))
2012 if (strcmp(fw, "BANC1G10"))
2015 return 0; /* blacklisted */
2019 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2020 * @args: device IDENTIFY data / SCSI command of interest.
2021 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2022 * @buflen: Response buffer length.
2024 * Simulate MODE SENSE commands. Assume this is invoked for direct
2025 * access devices (e.g. disks) only. There should be no block
2026 * descriptor for other device types.
2029 * spin_lock_irqsave(host lock)
2032 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2033 unsigned int buflen)
2035 struct ata_device *dev = args->dev;
2036 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2037 const u8 sat_blk_desc[] = {
2038 0, 0, 0, 0, /* number of blocks: sat unspecified */
2040 0, 0x2, 0x0 /* block length: 512 bytes */
2043 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2048 six_byte = (scsicmd[0] == MODE_SENSE);
2049 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2051 * LLBA bit in msense(10) ignored (compliant)
2054 page_control = scsicmd[2] >> 6;
2055 switch (page_control) {
2056 case 0: /* current */
2057 break; /* supported */
2059 goto saving_not_supp;
2060 case 1: /* changeable */
2061 case 2: /* defaults */
2067 output_len = 4 + (ebd ? 8 : 0);
2068 alloc_len = scsicmd[4];
2070 output_len = 8 + (ebd ? 8 : 0);
2071 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2073 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2075 p = rbuf + output_len;
2076 last = rbuf + minlen - 1;
2078 pg = scsicmd[2] & 0x3f;
2081 * No mode subpages supported (yet) but asking for _all_
2082 * subpages may be valid
2084 if (spg && (spg != ALL_SUB_MPAGES))
2088 case RW_RECOVERY_MPAGE:
2089 output_len += ata_msense_rw_recovery(&p, last);
2093 output_len += ata_msense_caching(args->id, &p, last);
2096 case CONTROL_MPAGE: {
2097 output_len += ata_msense_ctl_mode(&p, last);
2102 output_len += ata_msense_rw_recovery(&p, last);
2103 output_len += ata_msense_caching(args->id, &p, last);
2104 output_len += ata_msense_ctl_mode(&p, last);
2107 default: /* invalid page code */
2115 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2116 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2121 rbuf[0] = output_len;
2126 rbuf[3] = sizeof(sat_blk_desc);
2128 memcpy(rbuf + 4, sat_blk_desc,
2129 sizeof(sat_blk_desc));
2133 rbuf[0] = output_len >> 8;
2135 rbuf[1] = output_len;
2140 rbuf[7] = sizeof(sat_blk_desc);
2142 memcpy(rbuf + 8, sat_blk_desc,
2143 sizeof(sat_blk_desc));
2149 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2150 /* "Invalid field in cbd" */
2154 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2155 /* "Saving parameters not supported" */
2160 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2161 * @args: device IDENTIFY data / SCSI command of interest.
2162 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2163 * @buflen: Response buffer length.
2165 * Simulate READ CAPACITY commands.
2170 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2171 unsigned int buflen)
2173 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2177 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2178 if (last_lba >= 0xffffffffULL)
2179 last_lba = 0xffffffff;
2181 /* sector count, 32-bit */
2182 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2183 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2184 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2185 ATA_SCSI_RBUF_SET(3, last_lba);
2188 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2189 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2191 /* sector count, 64-bit */
2192 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2193 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2194 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2195 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2196 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2197 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2198 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2199 ATA_SCSI_RBUF_SET(7, last_lba);
2202 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2203 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2210 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2211 * @args: device IDENTIFY data / SCSI command of interest.
2212 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2213 * @buflen: Response buffer length.
2215 * Simulate REPORT LUNS command.
2218 * spin_lock_irqsave(host lock)
2221 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2222 unsigned int buflen)
2225 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2231 * ata_scsi_set_sense - Set SCSI sense data and status
2232 * @cmd: SCSI request to be handled
2233 * @sk: SCSI-defined sense key
2234 * @asc: SCSI-defined additional sense code
2235 * @ascq: SCSI-defined additional sense code qualifier
2237 * Helper function that builds a valid fixed format, current
2238 * response code and the given sense key (sk), additional sense
2239 * code (asc) and additional sense code qualifier (ascq) with
2240 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2241 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2247 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2249 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2251 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2252 cmd->sense_buffer[2] = sk;
2253 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2254 cmd->sense_buffer[12] = asc;
2255 cmd->sense_buffer[13] = ascq;
2259 * ata_scsi_badcmd - End a SCSI request with an error
2260 * @cmd: SCSI request to be handled
2261 * @done: SCSI command completion function
2262 * @asc: SCSI-defined additional sense code
2263 * @ascq: SCSI-defined additional sense code qualifier
2265 * Helper function that completes a SCSI command with
2266 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2267 * and the specified additional sense codes.
2270 * spin_lock_irqsave(host lock)
2273 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2276 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2281 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2283 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2284 /* FIXME: not quite right; we don't want the
2285 * translation of taskfile registers into
2286 * a sense descriptors, since that's only
2287 * correct for ATA, not ATAPI
2289 ata_gen_passthru_sense(qc);
2292 qc->scsidone(qc->scsicmd);
2296 /* is it pointless to prefer PIO for "safety reasons"? */
2297 static inline int ata_pio_use_silly(struct ata_port *ap)
2299 return (ap->flags & ATA_FLAG_PIO_DMA);
2302 static void atapi_request_sense(struct ata_queued_cmd *qc)
2304 struct ata_port *ap = qc->ap;
2305 struct scsi_cmnd *cmd = qc->scsicmd;
2307 DPRINTK("ATAPI request sense\n");
2309 /* FIXME: is this needed? */
2310 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2312 ap->ops->tf_read(ap, &qc->tf);
2314 /* fill these in, for the case where they are -not- overwritten */
2315 cmd->sense_buffer[0] = 0x70;
2316 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2320 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2321 qc->dma_dir = DMA_FROM_DEVICE;
2323 memset(&qc->cdb, 0, qc->dev->cdb_len);
2324 qc->cdb[0] = REQUEST_SENSE;
2325 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2327 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2328 qc->tf.command = ATA_CMD_PACKET;
2330 if (ata_pio_use_silly(ap)) {
2331 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2332 qc->tf.feature |= ATAPI_PKT_DMA;
2334 qc->tf.protocol = ATA_PROT_ATAPI;
2335 qc->tf.lbam = (8 * 1024) & 0xff;
2336 qc->tf.lbah = (8 * 1024) >> 8;
2338 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2340 qc->complete_fn = atapi_sense_complete;
2347 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2349 struct scsi_cmnd *cmd = qc->scsicmd;
2350 unsigned int err_mask = qc->err_mask;
2352 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2354 /* handle completion from new EH */
2355 if (unlikely(qc->ap->ops->error_handler &&
2356 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2358 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2359 /* FIXME: not quite right; we don't want the
2360 * translation of taskfile registers into a
2361 * sense descriptors, since that's only
2362 * correct for ATA, not ATAPI
2364 ata_gen_passthru_sense(qc);
2367 /* SCSI EH automatically locks door if sdev->locked is
2368 * set. Sometimes door lock request continues to
2369 * fail, for example, when no media is present. This
2370 * creates a loop - SCSI EH issues door lock which
2371 * fails and gets invoked again to acquire sense data
2372 * for the failed command.
2374 * If door lock fails, always clear sdev->locked to
2375 * avoid this infinite loop.
2377 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2378 qc->dev->sdev->locked = 0;
2380 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2386 /* successful completion or old EH failure path */
2387 if (unlikely(err_mask & AC_ERR_DEV)) {
2388 cmd->result = SAM_STAT_CHECK_CONDITION;
2389 atapi_request_sense(qc);
2391 } else if (unlikely(err_mask)) {
2392 /* FIXME: not quite right; we don't want the
2393 * translation of taskfile registers into
2394 * a sense descriptors, since that's only
2395 * correct for ATA, not ATAPI
2397 ata_gen_passthru_sense(qc);
2399 u8 *scsicmd = cmd->cmnd;
2401 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2403 unsigned int buflen;
2405 buflen = ata_scsi_rbuf_get(cmd, &buf);
2407 /* ATAPI devices typically report zero for their SCSI version,
2408 * and sometimes deviate from the spec WRT response data
2409 * format. If SCSI version is reported as zero like normal,
2410 * then we make the following fixups: 1) Fake MMC-5 version,
2411 * to indicate to the Linux scsi midlayer this is a modern
2412 * device. 2) Ensure response data format / ATAPI information
2413 * are always correct.
2420 ata_scsi_rbuf_put(cmd, buf);
2423 cmd->result = SAM_STAT_GOOD;
2430 * atapi_xlat - Initialize PACKET taskfile
2431 * @qc: command structure to be initialized
2434 * spin_lock_irqsave(host lock)
2437 * Zero on success, non-zero on failure.
2439 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2441 struct scsi_cmnd *scmd = qc->scsicmd;
2442 struct ata_device *dev = qc->dev;
2443 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2444 int nodata = (scmd->sc_data_direction == DMA_NONE);
2447 /* Check whether ATAPI DMA is safe */
2448 if (ata_check_atapi_dma(qc))
2451 memset(qc->cdb, 0, dev->cdb_len);
2452 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2454 qc->complete_fn = atapi_qc_complete;
2456 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2457 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2458 qc->tf.flags |= ATA_TFLAG_WRITE;
2459 DPRINTK("direction: write\n");
2462 qc->tf.command = ATA_CMD_PACKET;
2464 /* no data, or PIO data xfer */
2465 if (using_pio || nodata) {
2467 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2469 qc->tf.protocol = ATA_PROT_ATAPI;
2470 qc->tf.lbam = (8 * 1024) & 0xff;
2471 qc->tf.lbah = (8 * 1024) >> 8;
2476 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2477 qc->tf.feature |= ATAPI_PKT_DMA;
2479 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2480 /* some SATA bridges need us to indicate data xfer direction */
2481 qc->tf.feature |= ATAPI_DMADIR;
2484 qc->nbytes = scmd->request_bufflen;
2489 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2491 if (likely(id < ATA_MAX_DEVICES))
2492 return &ap->device[id];
2496 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2497 const struct scsi_device *scsidev)
2499 /* skip commands not addressed to targets we simulate */
2500 if (unlikely(scsidev->channel || scsidev->lun))
2503 return ata_find_dev(ap, scsidev->id);
2507 * ata_scsi_dev_enabled - determine if device is enabled
2510 * Determine if commands should be sent to the specified device.
2513 * spin_lock_irqsave(host lock)
2516 * 0 if commands are not allowed / 1 if commands are allowed
2519 static int ata_scsi_dev_enabled(struct ata_device *dev)
2521 if (unlikely(!ata_dev_enabled(dev)))
2524 if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
2525 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2526 ata_dev_printk(dev, KERN_WARNING,
2527 "WARNING: ATAPI is %s, device ignored.\n",
2528 atapi_enabled ? "not supported with this driver" : "disabled");
2537 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2538 * @ap: ATA port to which the device is attached
2539 * @scsidev: SCSI device from which we derive the ATA device
2541 * Given various information provided in struct scsi_cmnd,
2542 * map that onto an ATA bus, and using that mapping
2543 * determine which ata_device is associated with the
2544 * SCSI command to be sent.
2547 * spin_lock_irqsave(host lock)
2550 * Associated ATA device, or %NULL if not found.
2552 static struct ata_device *
2553 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2555 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2557 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2564 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2565 * @byte1: Byte 1 from pass-thru CDB.
2568 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2571 ata_scsi_map_proto(u8 byte1)
2573 switch((byte1 & 0x1e) >> 1) {
2574 case 3: /* Non-data */
2575 return ATA_PROT_NODATA;
2578 return ATA_PROT_DMA;
2580 case 4: /* PIO Data-in */
2581 case 5: /* PIO Data-out */
2582 return ATA_PROT_PIO;
2584 case 10: /* Device Reset */
2585 case 0: /* Hard Reset */
2587 case 2: /* Bus Idle */
2588 case 7: /* Packet */
2589 case 8: /* DMA Queued */
2590 case 9: /* Device Diagnostic */
2591 case 11: /* UDMA Data-in */
2592 case 12: /* UDMA Data-Out */
2593 case 13: /* FPDMA */
2594 default: /* Reserved */
2598 return ATA_PROT_UNKNOWN;
2602 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2603 * @qc: command structure to be initialized
2605 * Handles either 12 or 16-byte versions of the CDB.
2608 * Zero on success, non-zero on failure.
2610 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2612 struct ata_taskfile *tf = &(qc->tf);
2613 struct scsi_cmnd *scmd = qc->scsicmd;
2614 struct ata_device *dev = qc->dev;
2615 const u8 *cdb = scmd->cmnd;
2617 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2620 /* We may not issue DMA commands if no DMA mode is set */
2621 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2625 /* PIO multi not supported yet */
2629 * 12 and 16 byte CDBs use different offsets to
2630 * provide the various register values.
2632 if (cdb[0] == ATA_16) {
2634 * 16-byte CDB - may contain extended commands.
2636 * If that is the case, copy the upper byte register values.
2638 if (cdb[1] & 0x01) {
2639 tf->hob_feature = cdb[3];
2640 tf->hob_nsect = cdb[5];
2641 tf->hob_lbal = cdb[7];
2642 tf->hob_lbam = cdb[9];
2643 tf->hob_lbah = cdb[11];
2644 tf->flags |= ATA_TFLAG_LBA48;
2646 tf->flags &= ~ATA_TFLAG_LBA48;
2649 * Always copy low byte, device and command registers.
2651 tf->feature = cdb[4];
2656 tf->device = cdb[13];
2657 tf->command = cdb[14];
2660 * 12-byte CDB - incapable of extended commands.
2662 tf->flags &= ~ATA_TFLAG_LBA48;
2664 tf->feature = cdb[3];
2669 tf->device = cdb[8];
2670 tf->command = cdb[9];
2673 * If slave is possible, enforce correct master/slave bit
2675 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2676 tf->device = qc->dev->devno ?
2677 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2680 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2681 * SET_FEATURES - XFER MODE must be preceded/succeeded
2682 * by an update to hardware-specific registers for each
2683 * controller (i.e. the reason for ->set_piomode(),
2684 * ->set_dmamode(), and ->post_set_mode() hooks).
2686 if ((tf->command == ATA_CMD_SET_FEATURES)
2687 && (tf->feature == SETFEATURES_XFER))
2691 * Set flags so that all registers will be written,
2692 * and pass on write indication (used for PIO/DMA
2695 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2697 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2698 tf->flags |= ATA_TFLAG_WRITE;
2701 * Set transfer length.
2703 * TODO: find out if we need to do more here to
2704 * cover scatter/gather case.
2706 qc->nbytes = scmd->request_bufflen;
2708 /* request result TF */
2709 qc->flags |= ATA_QCFLAG_RESULT_TF;
2714 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2715 /* "Invalid field in cdb" */
2720 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2722 * @cmd: SCSI command opcode to consider
2724 * Look up the SCSI command given, and determine whether the
2725 * SCSI command is to be translated or simulated.
2728 * Pointer to translation function if possible, %NULL if not.
2731 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2741 return ata_scsi_rw_xlat;
2743 case SYNCHRONIZE_CACHE:
2744 if (ata_try_flush_cache(dev))
2745 return ata_scsi_flush_xlat;
2750 return ata_scsi_verify_xlat;
2754 return ata_scsi_pass_thru;
2757 return ata_scsi_start_stop_xlat;
2764 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2765 * @ap: ATA port to which the command was being sent
2766 * @cmd: SCSI command to dump
2768 * Prints the contents of a SCSI command via printk().
2771 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2772 struct scsi_cmnd *cmd)
2775 struct scsi_device *scsidev = cmd->device;
2776 u8 *scsicmd = cmd->cmnd;
2778 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2780 scsidev->channel, scsidev->id, scsidev->lun,
2781 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2782 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2787 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2788 void (*done)(struct scsi_cmnd *),
2789 struct ata_device *dev)
2793 if (unlikely(!scmd->cmd_len)) {
2794 ata_dev_printk(dev, KERN_WARNING, "WARNING: zero len CDB\n");
2795 scmd->result = DID_ERROR << 16;
2800 if (dev->class == ATA_DEV_ATA) {
2801 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2805 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2807 ata_scsi_simulate(dev, scmd, done);
2809 rc = ata_scsi_translate(dev, scmd, done, atapi_xlat);
2815 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2816 * @cmd: SCSI command to be sent
2817 * @done: Completion function, called when command is complete
2819 * In some cases, this function translates SCSI commands into
2820 * ATA taskfiles, and queues the taskfiles to be sent to
2821 * hardware. In other cases, this function simulates a
2822 * SCSI device by evaluating and responding to certain
2823 * SCSI commands. This creates the overall effect of
2824 * ATA and ATAPI devices appearing as SCSI devices.
2827 * Releases scsi-layer-held lock, and obtains host lock.
2830 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2833 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2835 struct ata_port *ap;
2836 struct ata_device *dev;
2837 struct scsi_device *scsidev = cmd->device;
2838 struct Scsi_Host *shost = scsidev->host;
2841 ap = ata_shost_to_port(shost);
2843 spin_unlock(shost->host_lock);
2844 spin_lock(ap->lock);
2846 ata_scsi_dump_cdb(ap, cmd);
2848 dev = ata_scsi_find_dev(ap, scsidev);
2850 rc = __ata_scsi_queuecmd(cmd, done, dev);
2852 cmd->result = (DID_BAD_TARGET << 16);
2856 spin_unlock(ap->lock);
2857 spin_lock(shost->host_lock);
2862 * ata_scsi_simulate - simulate SCSI command on ATA device
2863 * @dev: the target device
2864 * @cmd: SCSI command being sent to device.
2865 * @done: SCSI command completion function.
2867 * Interprets and directly executes a select list of SCSI commands
2868 * that can be handled internally.
2871 * spin_lock_irqsave(host lock)
2874 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2875 void (*done)(struct scsi_cmnd *))
2877 struct ata_scsi_args args;
2878 const u8 *scsicmd = cmd->cmnd;
2885 switch(scsicmd[0]) {
2886 /* no-op's, complete with success */
2887 case SYNCHRONIZE_CACHE:
2891 case TEST_UNIT_READY:
2892 case FORMAT_UNIT: /* FIXME: correct? */
2893 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2894 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2898 if (scsicmd[1] & 2) /* is CmdDt set? */
2899 ata_scsi_invalid_field(cmd, done);
2900 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2901 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2902 else if (scsicmd[2] == 0x00)
2903 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2904 else if (scsicmd[2] == 0x80)
2905 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2906 else if (scsicmd[2] == 0x83)
2907 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2909 ata_scsi_invalid_field(cmd, done);
2914 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2917 case MODE_SELECT: /* unconditionally return */
2918 case MODE_SELECT_10: /* bad-field-in-cdb */
2919 ata_scsi_invalid_field(cmd, done);
2923 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2926 case SERVICE_ACTION_IN:
2927 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2928 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2930 ata_scsi_invalid_field(cmd, done);
2934 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2937 /* mandatory commands we haven't implemented yet */
2940 /* all other commands */
2942 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2943 /* "Invalid command operation code" */
2949 void ata_scsi_scan_host(struct ata_port *ap)
2953 if (ap->flags & ATA_FLAG_DISABLED)
2956 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2957 struct ata_device *dev = &ap->device[i];
2958 struct scsi_device *sdev;
2960 if (!ata_dev_enabled(dev) || dev->sdev)
2963 sdev = __scsi_add_device(ap->scsi_host, 0, i, 0, NULL);
2964 if (!IS_ERR(sdev)) {
2966 scsi_device_put(sdev);
2972 * ata_scsi_offline_dev - offline attached SCSI device
2973 * @dev: ATA device to offline attached SCSI device for
2975 * This function is called from ata_eh_hotplug() and responsible
2976 * for taking the SCSI device attached to @dev offline. This
2977 * function is called with host lock which protects dev->sdev
2981 * spin_lock_irqsave(host lock)
2984 * 1 if attached SCSI device exists, 0 otherwise.
2986 int ata_scsi_offline_dev(struct ata_device *dev)
2989 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
2996 * ata_scsi_remove_dev - remove attached SCSI device
2997 * @dev: ATA device to remove attached SCSI device for
2999 * This function is called from ata_eh_scsi_hotplug() and
3000 * responsible for removing the SCSI device attached to @dev.
3003 * Kernel thread context (may sleep).
3005 static void ata_scsi_remove_dev(struct ata_device *dev)
3007 struct ata_port *ap = dev->ap;
3008 struct scsi_device *sdev;
3009 unsigned long flags;
3011 /* Alas, we need to grab scan_mutex to ensure SCSI device
3012 * state doesn't change underneath us and thus
3013 * scsi_device_get() always succeeds. The mutex locking can
3014 * be removed if there is __scsi_device_get() interface which
3015 * increments reference counts regardless of device state.
3017 mutex_lock(&ap->scsi_host->scan_mutex);
3018 spin_lock_irqsave(ap->lock, flags);
3020 /* clearing dev->sdev is protected by host lock */
3025 /* If user initiated unplug races with us, sdev can go
3026 * away underneath us after the host lock and
3027 * scan_mutex are released. Hold onto it.
3029 if (scsi_device_get(sdev) == 0) {
3030 /* The following ensures the attached sdev is
3031 * offline on return from ata_scsi_offline_dev()
3032 * regardless it wins or loses the race
3033 * against this function.
3035 scsi_device_set_state(sdev, SDEV_OFFLINE);
3042 spin_unlock_irqrestore(ap->lock, flags);
3043 mutex_unlock(&ap->scsi_host->scan_mutex);
3046 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3047 sdev->sdev_gendev.bus_id);
3049 scsi_remove_device(sdev);
3050 scsi_device_put(sdev);
3055 * ata_scsi_hotplug - SCSI part of hotplug
3056 * @work: Pointer to ATA port to perform SCSI hotplug on
3058 * Perform SCSI part of hotplug. It's executed from a separate
3059 * workqueue after EH completes. This is necessary because SCSI
3060 * hot plugging requires working EH and hot unplugging is
3061 * synchronized with hot plugging with a mutex.
3064 * Kernel thread context (may sleep).
3066 void ata_scsi_hotplug(struct work_struct *work)
3068 struct ata_port *ap =
3069 container_of(work, struct ata_port, hotplug_task.work);
3072 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3073 DPRINTK("ENTER/EXIT - unloading\n");
3079 /* unplug detached devices */
3080 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3081 struct ata_device *dev = &ap->device[i];
3082 unsigned long flags;
3084 if (!(dev->flags & ATA_DFLAG_DETACHED))
3087 spin_lock_irqsave(ap->lock, flags);
3088 dev->flags &= ~ATA_DFLAG_DETACHED;
3089 spin_unlock_irqrestore(ap->lock, flags);
3091 ata_scsi_remove_dev(dev);
3094 /* scan for new ones */
3095 ata_scsi_scan_host(ap);
3097 /* If we scanned while EH was in progress, scan would have
3098 * failed silently. Requeue if there are enabled but
3099 * unattached devices.
3101 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3102 struct ata_device *dev = &ap->device[i];
3103 if (ata_dev_enabled(dev) && !dev->sdev) {
3104 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3105 round_jiffies_relative(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 * @work: 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(struct work_struct *work)
3183 struct ata_port *ap =
3184 container_of(work, struct ata_port, scsi_rescan_task);
3185 unsigned long flags;
3188 spin_lock_irqsave(ap->lock, flags);
3190 for (i = 0; i < ATA_MAX_DEVICES; i++) {
3191 struct ata_device *dev = &ap->device[i];
3192 struct scsi_device *sdev = dev->sdev;
3194 if (!ata_dev_enabled(dev) || !sdev)
3196 if (scsi_device_get(sdev))
3199 spin_unlock_irqrestore(ap->lock, flags);
3200 scsi_rescan_device(&(sdev->sdev_gendev));
3201 scsi_device_put(sdev);
3202 spin_lock_irqsave(ap->lock, flags);
3205 spin_unlock_irqrestore(ap->lock, flags);
3209 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3210 * @host: ATA host container for all SAS ports
3211 * @port_info: Information from low-level host driver
3212 * @shost: SCSI host that the scsi device is attached to
3215 * PCI/etc. bus probe sem.
3218 * ata_port pointer on success / NULL on failure.
3221 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3222 struct ata_port_info *port_info,
3223 struct Scsi_Host *shost)
3225 struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
3226 struct ata_probe_ent *ent;
3231 ent = ata_probe_ent_alloc(host->dev, port_info);
3237 ata_port_init(ap, host, ent, 0);
3238 ap->lock = shost->host_lock;
3239 devm_kfree(host->dev, ent);
3242 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3245 * ata_sas_port_start - Set port up for dma.
3246 * @ap: Port to initialize
3248 * Called just after data structures for each port are
3249 * initialized. Allocates DMA pad.
3251 * May be used as the port_start() entry in ata_port_operations.
3254 * Inherited from caller.
3256 int ata_sas_port_start(struct ata_port *ap)
3258 return ata_pad_alloc(ap, ap->dev);
3260 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3263 * ata_port_stop - Undo ata_sas_port_start()
3264 * @ap: Port to shut down
3266 * Frees the DMA pad.
3268 * May be used as the port_stop() entry in ata_port_operations.
3271 * Inherited from caller.
3274 void ata_sas_port_stop(struct ata_port *ap)
3276 ata_pad_free(ap, ap->dev);
3278 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3281 * ata_sas_port_init - Initialize a SATA device
3282 * @ap: SATA port to initialize
3285 * PCI/etc. bus probe sem.
3288 * Zero on success, non-zero on error.
3291 int ata_sas_port_init(struct ata_port *ap)
3293 int rc = ap->ops->port_start(ap);
3296 rc = ata_bus_probe(ap);
3300 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3303 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3304 * @ap: SATA port to destroy
3308 void ata_sas_port_destroy(struct ata_port *ap)
3310 if (ap->ops->port_stop)
3311 ap->ops->port_stop(ap);
3314 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3317 * ata_sas_slave_configure - Default slave_config routine for libata devices
3318 * @sdev: SCSI device to configure
3319 * @ap: ATA port to which SCSI device is attached
3325 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3327 ata_scsi_sdev_config(sdev);
3328 ata_scsi_dev_config(sdev, ap->device);
3331 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3334 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3335 * @cmd: SCSI command to be sent
3336 * @done: Completion function, called when command is complete
3337 * @ap: ATA port to which the command is being sent
3340 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3344 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3345 struct ata_port *ap)
3349 ata_scsi_dump_cdb(ap, cmd);
3351 if (likely(ata_scsi_dev_enabled(ap->device)))
3352 rc = __ata_scsi_queuecmd(cmd, done, ap->device);
3354 cmd->result = (DID_BAD_TARGET << 16);
3359 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);