Move libata to drivers/ata.

1 files changed, 0 insertions, 3322 deletions

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
deleted file mode 100644
index d168e3413661..000000000000
--- a/drivers/scsi/libata-scsi.c
+++ /dev/null
@@ -1,3322 +0,0 @@
-/*
- *  libata-scsi.c - helper library for ATA
- *
- *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
- *    		    Please ALWAYS copy linux-ide@vger.kernel.org
- *		    on emails.
- *
- *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
- *  Copyright 2003-2004 Jeff Garzik
- *
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2, or (at your option)
- *  any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; see the file COPYING.  If not, write to
- *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- *  libata documentation is available via 'make {ps|pdf}docs',
- *  as Documentation/DocBook/libata.*
- *
- *  Hardware documentation available from
- *  - http://www.t10.org/
- *  - http://www.t13.org/
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/blkdev.h>
-#include <linux/spinlock.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_eh.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_tcq.h>
-#include <scsi/scsi_transport.h>
-#include <linux/libata.h>
-#include <linux/hdreg.h>
-#include <asm/uaccess.h>
-
-#include "libata.h"
-
-#define SECTOR_SIZE	512
-
-typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
-
-static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
-					const struct scsi_device *scsidev);
-static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
-					    const struct scsi_device *scsidev);
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
-			      unsigned int id, unsigned int lun);
-
-
-#define RW_RECOVERY_MPAGE 0x1
-#define RW_RECOVERY_MPAGE_LEN 12
-#define CACHE_MPAGE 0x8
-#define CACHE_MPAGE_LEN 20
-#define CONTROL_MPAGE 0xa
-#define CONTROL_MPAGE_LEN 12
-#define ALL_MPAGES 0x3f
-#define ALL_SUB_MPAGES 0xff
-
-
-static const u8 def_rw_recovery_mpage[] = {
-	RW_RECOVERY_MPAGE,
-	RW_RECOVERY_MPAGE_LEN - 2,
-	(1 << 7) |	/* AWRE, sat-r06 say it shall be 0 */
-	    (1 << 6),	/* ARRE (auto read reallocation) */
-	0,		/* read retry count */
-	0, 0, 0, 0,
-	0,		/* write retry count */
-	0, 0, 0
-};
-
-static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
-	CACHE_MPAGE,
-	CACHE_MPAGE_LEN - 2,
-	0,		/* contains WCE, needs to be 0 for logic */
-	0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0,		/* contains DRA, needs to be 0 for logic */
-	0, 0, 0, 0, 0, 0, 0
-};
-
-static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
-	CONTROL_MPAGE,
-	CONTROL_MPAGE_LEN - 2,
-	2,	/* DSENSE=0, GLTSD=1 */
-	0,	/* [QAM+QERR may be 1, see 05-359r1] */
-	0, 0, 0, 0, 0xff, 0xff,
-	0, 30	/* extended self test time, see 05-359r1 */
-};
-
-/*
- * libata transport template.  libata doesn't do real transport stuff.
- * It just needs the eh_timed_out hook.
- */
-struct scsi_transport_template ata_scsi_transport_template = {
-	.eh_strategy_handler	= ata_scsi_error,
-	.eh_timed_out		= ata_scsi_timed_out,
-	.user_scan		= ata_scsi_user_scan,
-};
-
-
-static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
-				   void (*done)(struct scsi_cmnd *))
-{
-	ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
-	/* "Invalid field in cbd" */
-	done(cmd);
-}
-
-/**
- *	ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
- *	@sdev: SCSI device for which BIOS geometry is to be determined
- *	@bdev: block device associated with @sdev
- *	@capacity: capacity of SCSI device
- *	@geom: location to which geometry will be output
- *
- *	Generic bios head/sector/cylinder calculator
- *	used by sd. Most BIOSes nowadays expect a XXX/255/16  (CHS)
- *	mapping. Some situations may arise where the disk is not
- *	bootable if this is not used.
- *
- *	LOCKING:
- *	Defined by the SCSI layer.  We don't really care.
- *
- *	RETURNS:
- *	Zero.
- */
-int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
-		       sector_t capacity, int geom[])
-{
-	geom[0] = 255;
-	geom[1] = 63;
-	sector_div(capacity, 255*63);
-	geom[2] = capacity;
-
-	return 0;
-}
-
-/**
- *	ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
- *	@scsidev: Device to which we are issuing command
- *	@arg: User provided data for issuing command
- *
- *	LOCKING:
- *	Defined by the SCSI layer.  We don't really care.
- *
- *	RETURNS:
- *	Zero on success, negative errno on error.
- */
-
-int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
-{
-	int rc = 0;
-	u8 scsi_cmd[MAX_COMMAND_SIZE];
-	u8 args[4], *argbuf = NULL;
-	int argsize = 0;
-	struct scsi_sense_hdr sshdr;
-	enum dma_data_direction data_dir;
-
-	if (arg == NULL)
-		return -EINVAL;
-
-	if (copy_from_user(args, arg, sizeof(args)))
-		return -EFAULT;
-
-	memset(scsi_cmd, 0, sizeof(scsi_cmd));
-
-	if (args[3]) {
-		argsize = SECTOR_SIZE * args[3];
-		argbuf = kmalloc(argsize, GFP_KERNEL);
-		if (argbuf == NULL) {
-			rc = -ENOMEM;
-			goto error;
-		}
-
-		scsi_cmd[1]  = (4 << 1); /* PIO Data-in */
-		scsi_cmd[2]  = 0x0e;     /* no off.line or cc, read from dev,
-		                            block count in sector count field */
-		data_dir = DMA_FROM_DEVICE;
-	} else {
-		scsi_cmd[1]  = (3 << 1); /* Non-data */
-		/* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
-		data_dir = DMA_NONE;
-	}
-
-	scsi_cmd[0] = ATA_16;
-
-	scsi_cmd[4] = args[2];
-	if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
-		scsi_cmd[6]  = args[3];
-		scsi_cmd[8]  = args[1];
-		scsi_cmd[10] = 0x4f;
-		scsi_cmd[12] = 0xc2;
-	} else {
-		scsi_cmd[6]  = args[1];
-	}
-	scsi_cmd[14] = args[0];
-
-	/* Good values for timeout and retries?  Values below
-	   from scsi_ioctl_send_command() for default case... */
-	if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
-			     &sshdr, (10*HZ), 5)) {
-		rc = -EIO;
-		goto error;
-	}
-
-	/* Need code to retrieve data from check condition? */
-
-	if ((argbuf)
-	 && copy_to_user(arg + sizeof(args), argbuf, argsize))
-		rc = -EFAULT;
-error:
-	kfree(argbuf);
-	return rc;
-}
-
-/**
- *	ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
- *	@scsidev: Device to which we are issuing command
- *	@arg: User provided data for issuing command
- *
- *	LOCKING:
- *	Defined by the SCSI layer.  We don't really care.
- *
- *	RETURNS:
- *	Zero on success, negative errno on error.
- */
-int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
-{
-	int rc = 0;
-	u8 scsi_cmd[MAX_COMMAND_SIZE];
-	u8 args[7];
-	struct scsi_sense_hdr sshdr;
-
-	if (arg == NULL)
-		return -EINVAL;
-
-	if (copy_from_user(args, arg, sizeof(args)))
-		return -EFAULT;
-
-	memset(scsi_cmd, 0, sizeof(scsi_cmd));
-	scsi_cmd[0]  = ATA_16;
-	scsi_cmd[1]  = (3 << 1); /* Non-data */
-	/* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
-	scsi_cmd[4]  = args[1];
-	scsi_cmd[6]  = args[2];
-	scsi_cmd[8]  = args[3];
-	scsi_cmd[10] = args[4];
-	scsi_cmd[12] = args[5];
-	scsi_cmd[14] = args[0];
-
-	/* Good values for timeout and retries?  Values below
-	   from scsi_ioctl_send_command() for default case... */
-	if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
-			     (10*HZ), 5))
-		rc = -EIO;
-
-	/* Need code to retrieve data from check condition? */
-	return rc;
-}
-
-int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
-{
-	int val = -EINVAL, rc = -EINVAL;
-
-	switch (cmd) {
-	case ATA_IOC_GET_IO32:
-		val = 0;
-		if (copy_to_user(arg, &val, 1))
-			return -EFAULT;
-		return 0;
-
-	case ATA_IOC_SET_IO32:
-		val = (unsigned long) arg;
-		if (val != 0)
-			return -EINVAL;
-		return 0;
-
-	case HDIO_DRIVE_CMD:
-		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
-			return -EACCES;
-		return ata_cmd_ioctl(scsidev, arg);
-
-	case HDIO_DRIVE_TASK:
-		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
-			return -EACCES;
-		return ata_task_ioctl(scsidev, arg);
-
-	default:
-		rc = -ENOTTY;
-		break;
-	}
-
-	return rc;
-}
-
-/**
- *	ata_scsi_qc_new - acquire new ata_queued_cmd reference
- *	@dev: ATA device to which the new command is attached
- *	@cmd: SCSI command that originated this ATA command
- *	@done: SCSI command completion function
- *
- *	Obtain a reference to an unused ata_queued_cmd structure,
- *	which is the basic libata structure representing a single
- *	ATA command sent to the hardware.
- *
- *	If a command was available, fill in the SCSI-specific
- *	portions of the structure with information on the
- *	current command.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Command allocated, or %NULL if none available.
- */
-struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
-				       struct scsi_cmnd *cmd,
-				       void (*done)(struct scsi_cmnd *))
-{
-	struct ata_queued_cmd *qc;
-
-	qc = ata_qc_new_init(dev);
-	if (qc) {
-		qc->scsicmd = cmd;
-		qc->scsidone = done;
-
-		if (cmd->use_sg) {
-			qc->__sg = (struct scatterlist *) cmd->request_buffer;
-			qc->n_elem = cmd->use_sg;
-		} else {
-			qc->__sg = &qc->sgent;
-			qc->n_elem = 1;
-		}
-	} else {
-		cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
-		done(cmd);
-	}
-
-	return qc;
-}
-
-/**
- *	ata_dump_status - user friendly display of error info
- *	@id: id of the port in question
- *	@tf: ptr to filled out taskfile
- *
- *	Decode and dump the ATA error/status registers for the user so
- *	that they have some idea what really happened at the non
- *	make-believe layer.
- *
- *	LOCKING:
- *	inherited from caller
- */
-void ata_dump_status(unsigned id, struct ata_taskfile *tf)
-{
-	u8 stat = tf->command, err = tf->feature;
-
-	printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
-	if (stat & ATA_BUSY) {
-		printk("Busy }\n");	/* Data is not valid in this case */
-	} else {
-		if (stat & 0x40)	printk("DriveReady ");
-		if (stat & 0x20)	printk("DeviceFault ");
-		if (stat & 0x10)	printk("SeekComplete ");
-		if (stat & 0x08)	printk("DataRequest ");
-		if (stat & 0x04)	printk("CorrectedError ");
-		if (stat & 0x02)	printk("Index ");
-		if (stat & 0x01)	printk("Error ");
-		printk("}\n");
-
-		if (err) {
-			printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
-			if (err & 0x04)		printk("DriveStatusError ");
-			if (err & 0x80) {
-				if (err & 0x04)	printk("BadCRC ");
-				else		printk("Sector ");
-			}
-			if (err & 0x40)		printk("UncorrectableError ");
-			if (err & 0x10)		printk("SectorIdNotFound ");
-			if (err & 0x02)		printk("TrackZeroNotFound ");
-			if (err & 0x01)		printk("AddrMarkNotFound ");
-			printk("}\n");
-		}
-	}
-}
-
-/**
- *	ata_scsi_device_suspend - suspend ATA device associated with sdev
- *	@sdev: the SCSI device to suspend
- *	@mesg: target power management message
- *
- *	Request suspend EH action on the ATA device associated with
- *	@sdev and wait for the operation to complete.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- *
- *	RETURNS:
- *	0 on success, -errno otherwise.
- */
-int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
-{
-	struct ata_port *ap = ata_shost_to_port(sdev->host);
-	struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
-	unsigned long flags;
-	unsigned int action;
-	int rc = 0;
-
-	if (!dev)
-		goto out;
-
-	spin_lock_irqsave(ap->lock, flags);
-
-	/* wait for the previous resume to complete */
-	while (dev->flags & ATA_DFLAG_SUSPENDED) {
-		spin_unlock_irqrestore(ap->lock, flags);
-		ata_port_wait_eh(ap);
-		spin_lock_irqsave(ap->lock, flags);
-	}
-
-	/* if @sdev is already detached, nothing to do */
-	if (sdev->sdev_state == SDEV_OFFLINE ||
-	    sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
-		goto out_unlock;
-
-	/* request suspend */
-	action = ATA_EH_SUSPEND;
-	if (mesg.event != PM_EVENT_SUSPEND)
-		action |= ATA_EH_PM_FREEZE;
-	ap->eh_info.dev_action[dev->devno] |= action;
-	ap->eh_info.flags |= ATA_EHI_QUIET;
-	ata_port_schedule_eh(ap);
-
-	spin_unlock_irqrestore(ap->lock, flags);
-
-	/* wait for EH to do the job */
-	ata_port_wait_eh(ap);
-
-	spin_lock_irqsave(ap->lock, flags);
-
-	/* If @sdev is still attached but the associated ATA device
-	 * isn't suspended, the operation failed.
-	 */
-	if (sdev->sdev_state != SDEV_OFFLINE &&
-	    sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
-	    !(dev->flags & ATA_DFLAG_SUSPENDED))
-		rc = -EIO;
-
- out_unlock:
-	spin_unlock_irqrestore(ap->lock, flags);
- out:
-	if (rc == 0)
-		sdev->sdev_gendev.power.power_state = mesg;
-	return rc;
-}
-
-/**
- *	ata_scsi_device_resume - resume ATA device associated with sdev
- *	@sdev: the SCSI device to resume
- *
- *	Request resume EH action on the ATA device associated with
- *	@sdev and return immediately.  This enables parallel
- *	wakeup/spinup of devices.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- *
- *	RETURNS:
- *	0.
- */
-int ata_scsi_device_resume(struct scsi_device *sdev)
-{
-	struct ata_port *ap = ata_shost_to_port(sdev->host);
-	struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
-	struct ata_eh_info *ehi = &ap->eh_info;
-	unsigned long flags;
-	unsigned int action;
-
-	if (!dev)
-		goto out;
-
-	spin_lock_irqsave(ap->lock, flags);
-
-	/* if @sdev is already detached, nothing to do */
-	if (sdev->sdev_state == SDEV_OFFLINE ||
-	    sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
-		goto out_unlock;
-
-	/* request resume */
-	action = ATA_EH_RESUME;
-	if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
-		__ata_ehi_hotplugged(ehi);
-	else
-		action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
-	ehi->dev_action[dev->devno] |= action;
-
-	/* We don't want autopsy and verbose EH messages.  Disable
-	 * those if we're the only device on this link.
-	 */
-	if (ata_port_max_devices(ap) == 1)
-		ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
-
-	ata_port_schedule_eh(ap);
-
- out_unlock:
-	spin_unlock_irqrestore(ap->lock, flags);
- out:
-	sdev->sdev_gendev.power.power_state = PMSG_ON;
-	return 0;
-}
-
-/**
- *	ata_to_sense_error - convert ATA error to SCSI error
- *	@id: ATA device number
- *	@drv_stat: value contained in ATA status register
- *	@drv_err: value contained in ATA error register
- *	@sk: the sense key we'll fill out
- *	@asc: the additional sense code we'll fill out
- *	@ascq: the additional sense code qualifier we'll fill out
- *	@verbose: be verbose
- *
- *	Converts an ATA error into a SCSI error.  Fill out pointers to
- *	SK, ASC, and ASCQ bytes for later use in fixed or descriptor
- *	format sense blocks.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
-			u8 *ascq, int verbose)
-{
-	int i;
-
-	/* Based on the 3ware driver translation table */
-	static const unsigned char sense_table[][4] = {
-		/* BBD|ECC|ID|MAR */
-		{0xd1, 		ABORTED_COMMAND, 0x00, 0x00}, 	// Device busy                  Aborted command
-		/* BBD|ECC|ID */
-		{0xd0,  	ABORTED_COMMAND, 0x00, 0x00}, 	// Device busy                  Aborted command
-		/* ECC|MC|MARK */
-		{0x61, 		HARDWARE_ERROR, 0x00, 0x00}, 	// Device fault                 Hardware error
-		/* ICRC|ABRT */		/* NB: ICRC & !ABRT is BBD */
-		{0x84, 		ABORTED_COMMAND, 0x47, 0x00}, 	// Data CRC error               SCSI parity error
-		/* MC|ID|ABRT|TRK0|MARK */
-		{0x37, 		NOT_READY, 0x04, 0x00}, 	// Unit offline                 Not ready
-		/* MCR|MARK */
-		{0x09, 		NOT_READY, 0x04, 0x00}, 	// Unrecovered disk error       Not ready
-		/*  Bad address mark */
-		{0x01, 		MEDIUM_ERROR, 0x13, 0x00}, 	// Address mark not found       Address mark not found for data field
-		/* TRK0 */
-		{0x02, 		HARDWARE_ERROR, 0x00, 0x00}, 	// Track 0 not found		  Hardware error
-		/* Abort & !ICRC */
-		{0x04, 		ABORTED_COMMAND, 0x00, 0x00}, 	// Aborted command              Aborted command
-		/* Media change request */
-		{0x08, 		NOT_READY, 0x04, 0x00}, 	// Media change request	  FIXME: faking offline
-		/* SRV */
-		{0x10, 		ABORTED_COMMAND, 0x14, 0x00}, 	// ID not found                 Recorded entity not found
-		/* Media change */
-		{0x08,  	NOT_READY, 0x04, 0x00}, 	// Media change		  FIXME: faking offline
-		/* ECC */
-		{0x40, 		MEDIUM_ERROR, 0x11, 0x04}, 	// Uncorrectable ECC error      Unrecovered read error
-		/* BBD - block marked bad */
-		{0x80, 		MEDIUM_ERROR, 0x11, 0x04}, 	// Block marked bad		  Medium error, unrecovered read error
-		{0xFF, 0xFF, 0xFF, 0xFF}, // END mark
-	};
-	static const unsigned char stat_table[][4] = {
-		/* Must be first because BUSY means no other bits valid */
-		{0x80, 		ABORTED_COMMAND, 0x47, 0x00},	// Busy, fake parity for now
-		{0x20, 		HARDWARE_ERROR,  0x00, 0x00}, 	// Device fault
-		{0x08, 		ABORTED_COMMAND, 0x47, 0x00},	// Timed out in xfer, fake parity for now
-		{0x04, 		RECOVERED_ERROR, 0x11, 0x00},	// Recovered ECC error	  Medium error, recovered
-		{0xFF, 0xFF, 0xFF, 0xFF}, // END mark
-	};
-
-	/*
-	 *	Is this an error we can process/parse
-	 */
-	if (drv_stat & ATA_BUSY) {
-		drv_err = 0;	/* Ignore the err bits, they're invalid */
-	}
-
-	if (drv_err) {
-		/* Look for drv_err */
-		for (i = 0; sense_table[i][0] != 0xFF; i++) {
-			/* Look for best matches first */
-			if ((sense_table[i][0] & drv_err) ==
-			    sense_table[i][0]) {
-				*sk = sense_table[i][1];
-				*asc = sense_table[i][2];
-				*ascq = sense_table[i][3];
-				goto translate_done;
-			}
-		}
-		/* No immediate match */
-		if (verbose)
-			printk(KERN_WARNING "ata%u: no sense translation for "
-			       "error 0x%02x\n", id, drv_err);
-	}
-
-	/* Fall back to interpreting status bits */
-	for (i = 0; stat_table[i][0] != 0xFF; i++) {
-		if (stat_table[i][0] & drv_stat) {
-			*sk = stat_table[i][1];
-			*asc = stat_table[i][2];
-			*ascq = stat_table[i][3];
-			goto translate_done;
-		}
-	}
-	/* No error?  Undecoded? */
-	if (verbose)
-		printk(KERN_WARNING "ata%u: no sense translation for "
-		       "status: 0x%02x\n", id, drv_stat);
-
-	/* We need a sensible error return here, which is tricky, and one
-	   that won't cause people to do things like return a disk wrongly */
-	*sk = ABORTED_COMMAND;
-	*asc = 0x00;
-	*ascq = 0x00;
-
- translate_done:
-	if (verbose)
-		printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
-		       "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
-		       id, drv_stat, drv_err, *sk, *asc, *ascq);
-	return;
-}
-
-/*
- *	ata_gen_ata_desc_sense - Generate check condition sense block.
- *	@qc: Command that completed.
- *
- *	This function is specific to the ATA descriptor format sense
- *	block specified for the ATA pass through commands.  Regardless
- *	of whether the command errored or not, return a sense
- *	block. Copy all controller registers into the sense
- *	block. Clear sense key, ASC & ASCQ if there is no error.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
-{
-	struct scsi_cmnd *cmd = qc->scsicmd;
-	struct ata_taskfile *tf = &qc->result_tf;
-	unsigned char *sb = cmd->sense_buffer;
-	unsigned char *desc = sb + 8;
-	int verbose = qc->ap->ops->error_handler == NULL;
-
-	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
-
-	cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
-
-	/*
-	 * Use ata_to_sense_error() to map status register bits
-	 * onto sense key, asc & ascq.
-	 */
-	if (qc->err_mask ||
-	    tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
-		ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
-				   &sb[1], &sb[2], &sb[3], verbose);
-		sb[1] &= 0x0f;
-	}
-
-	/*
-	 * Sense data is current and format is descriptor.
-	 */
-	sb[0] = 0x72;
-
-	desc[0] = 0x09;
-
-	/*
-	 * Set length of additional sense data.
-	 * Since we only populate descriptor 0, the total
-	 * length is the same (fixed) length as descriptor 0.
-	 */
-	desc[1] = sb[7] = 14;
-
-	/*
-	 * Copy registers into sense buffer.
-	 */
-	desc[2] = 0x00;
-	desc[3] = tf->feature;	/* == error reg */
-	desc[5] = tf->nsect;
-	desc[7] = tf->lbal;
-	desc[9] = tf->lbam;
-	desc[11] = tf->lbah;
-	desc[12] = tf->device;
-	desc[13] = tf->command; /* == status reg */
-
-	/*
-	 * Fill in Extend bit, and the high order bytes
-	 * if applicable.
-	 */
-	if (tf->flags & ATA_TFLAG_LBA48) {
-		desc[2] |= 0x01;
-		desc[4] = tf->hob_nsect;
-		desc[6] = tf->hob_lbal;
-		desc[8] = tf->hob_lbam;
-		desc[10] = tf->hob_lbah;
-	}
-}
-
-/**
- *	ata_gen_fixed_sense - generate a SCSI fixed sense block
- *	@qc: Command that we are erroring out
- *
- *	Leverage ata_to_sense_error() to give us the codes.  Fit our
- *	LBA in here if there's room.
- *
- *	LOCKING:
- *	inherited from caller
- */
-void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
-{
-	struct scsi_cmnd *cmd = qc->scsicmd;
-	struct ata_taskfile *tf = &qc->result_tf;
-	unsigned char *sb = cmd->sense_buffer;
-	int verbose = qc->ap->ops->error_handler == NULL;
-
-	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
-
-	cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
-
-	/*
-	 * Use ata_to_sense_error() to map status register bits
-	 * onto sense key, asc & ascq.
-	 */
-	if (qc->err_mask ||
-	    tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
-		ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
-				   &sb[2], &sb[12], &sb[13], verbose);
-		sb[2] &= 0x0f;
-	}
-
-	sb[0] = 0x70;
-	sb[7] = 0x0a;
-
-	if (tf->flags & ATA_TFLAG_LBA48) {
-		/* TODO: find solution for LBA48 descriptors */
-	}
-
-	else if (tf->flags & ATA_TFLAG_LBA) {
-		/* A small (28b) LBA will fit in the 32b info field */
-		sb[0] |= 0x80;		/* set valid bit */
-		sb[3] = tf->device & 0x0f;
-		sb[4] = tf->lbah;
-		sb[5] = tf->lbam;
-		sb[6] = tf->lbal;
-	}
-
-	else {
-		/* TODO: C/H/S */
-	}
-}
-
-static void ata_scsi_sdev_config(struct scsi_device *sdev)
-{
-	sdev->use_10_for_rw = 1;
-	sdev->use_10_for_ms = 1;
-}
-
-static void ata_scsi_dev_config(struct scsi_device *sdev,
-				struct ata_device *dev)
-{
-	unsigned int max_sectors;
-
-	/* TODO: 2048 is an arbitrary number, not the
-	 * hardware maximum.  This should be increased to
-	 * 65534 when Jens Axboe's patch for dynamically
-	 * determining max_sectors is merged.
-	 */
-	max_sectors = ATA_MAX_SECTORS;
-	if (dev->flags & ATA_DFLAG_LBA48)
-		max_sectors = ATA_MAX_SECTORS_LBA48;
-	if (dev->max_sectors)
-		max_sectors = dev->max_sectors;
-
-	blk_queue_max_sectors(sdev->request_queue, max_sectors);
-
-	/*
-	 * SATA DMA transfers must be multiples of 4 byte, so
-	 * we need to pad ATAPI transfers using an extra sg.
-	 * Decrement max hw segments accordingly.
-	 */
-	if (dev->class == ATA_DEV_ATAPI) {
-		request_queue_t *q = sdev->request_queue;
-		blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
-	}
-
-	if (dev->flags & ATA_DFLAG_NCQ) {
-		int depth;
-
-		depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
-		depth = min(ATA_MAX_QUEUE - 1, depth);
-		scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
-	}
-}
-
-/**
- *	ata_scsi_slave_config - Set SCSI device attributes
- *	@sdev: SCSI device to examine
- *
- *	This is called before we actually start reading
- *	and writing to the device, to configure certain
- *	SCSI mid-layer behaviors.
- *
- *	LOCKING:
- *	Defined by SCSI layer.  We don't really care.
- */
-
-int ata_scsi_slave_config(struct scsi_device *sdev)
-{
-	struct ata_port *ap = ata_shost_to_port(sdev->host);
-	struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
-
-	ata_scsi_sdev_config(sdev);
-
-	blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
-
-	if (dev)
-		ata_scsi_dev_config(sdev, dev);
-
-	return 0;	/* scsi layer doesn't check return value, sigh */
-}
-
-/**
- *	ata_scsi_slave_destroy - SCSI device is about to be destroyed
- *	@sdev: SCSI device to be destroyed
- *
- *	@sdev is about to be destroyed for hot/warm unplugging.  If
- *	this unplugging was initiated by libata as indicated by NULL
- *	dev->sdev, this function doesn't have to do anything.
- *	Otherwise, SCSI layer initiated warm-unplug is in progress.
- *	Clear dev->sdev, schedule the device for ATA detach and invoke
- *	EH.
- *
- *	LOCKING:
- *	Defined by SCSI layer.  We don't really care.
- */
-void ata_scsi_slave_destroy(struct scsi_device *sdev)
-{
-	struct ata_port *ap = ata_shost_to_port(sdev->host);
-	unsigned long flags;
-	struct ata_device *dev;
-
-	if (!ap->ops->error_handler)
-		return;
-
-	spin_lock_irqsave(ap->lock, flags);
-	dev = __ata_scsi_find_dev(ap, sdev);
-	if (dev && dev->sdev) {
-		/* SCSI device already in CANCEL state, no need to offline it */
-		dev->sdev = NULL;
-		dev->flags |= ATA_DFLAG_DETACH;
-		ata_port_schedule_eh(ap);
-	}
-	spin_unlock_irqrestore(ap->lock, flags);
-}
-
-/**
- *	ata_scsi_change_queue_depth - SCSI callback for queue depth config
- *	@sdev: SCSI device to configure queue depth for
- *	@queue_depth: new queue depth
- *
- *	This is libata standard hostt->change_queue_depth callback.
- *	SCSI will call into this callback when user tries to set queue
- *	depth via sysfs.
- *
- *	LOCKING:
- *	SCSI layer (we don't care)
- *
- *	RETURNS:
- *	Newly configured queue depth.
- */
-int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
-{
-	struct ata_port *ap = ata_shost_to_port(sdev->host);
-	struct ata_device *dev;
-	int max_depth;
-
-	if (queue_depth < 1)
-		return sdev->queue_depth;
-
-	dev = ata_scsi_find_dev(ap, sdev);
-	if (!dev || !ata_dev_enabled(dev))
-		return sdev->queue_depth;
-
-	max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
-	max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
-	if (queue_depth > max_depth)
-		queue_depth = max_depth;
-
-	scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
-	return queue_depth;
-}
-
-/**
- *	ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
- *	@qc: Storage for translated ATA taskfile
- *	@scsicmd: SCSI command to translate
- *
- *	Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
- *	(to start). Perhaps these commands should be preceded by
- *	CHECK POWER MODE to see what power mode the device is already in.
- *	[See SAT revision 5 at www.t10.org]
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
-					     const u8 *scsicmd)
-{
-	struct ata_taskfile *tf = &qc->tf;
-
-	tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
-	tf->protocol = ATA_PROT_NODATA;
-	if (scsicmd[1] & 0x1) {
-		;	/* ignore IMMED bit, violates sat-r05 */
-	}
-	if (scsicmd[4] & 0x2)
-		goto invalid_fld;       /* LOEJ bit set not supported */
-	if (((scsicmd[4] >> 4) & 0xf) != 0)
-		goto invalid_fld;       /* power conditions not supported */
-	if (scsicmd[4] & 0x1) {
-		tf->nsect = 1;	/* 1 sector, lba=0 */
-
-		if (qc->dev->flags & ATA_DFLAG_LBA) {
-			tf->flags |= ATA_TFLAG_LBA;
-
-			tf->lbah = 0x0;
-			tf->lbam = 0x0;
-			tf->lbal = 0x0;
-			tf->device |= ATA_LBA;
-		} else {
-			/* CHS */
-			tf->lbal = 0x1; /* sect */
-			tf->lbam = 0x0; /* cyl low */
-			tf->lbah = 0x0; /* cyl high */
-		}
-
-		tf->command = ATA_CMD_VERIFY;	/* READ VERIFY */
-	} else {
-		tf->nsect = 0;	/* time period value (0 implies now) */
-		tf->command = ATA_CMD_STANDBY;
-		/* Consider: ATA STANDBY IMMEDIATE command */
-	}
-	/*
-	 * Standby and Idle condition timers could be implemented but that
-	 * would require libata to implement the Power condition mode page
-	 * and allow the user to change it. Changing mode pages requires
-	 * MODE SELECT to be implemented.
-	 */
-
-	return 0;
-
-invalid_fld:
-	ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
-	/* "Invalid field in cbd" */
-	return 1;
-}
-
-
-/**
- *	ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
- *	@qc: Storage for translated ATA taskfile
- *	@scsicmd: SCSI command to translate (ignored)
- *
- *	Sets up an ATA taskfile to issue FLUSH CACHE or
- *	FLUSH CACHE EXT.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
-	struct ata_taskfile *tf = &qc->tf;
-
-	tf->flags |= ATA_TFLAG_DEVICE;
-	tf->protocol = ATA_PROT_NODATA;
-
-	if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
-	    (ata_id_has_flush_ext(qc->dev->id)))
-		tf->command = ATA_CMD_FLUSH_EXT;
-	else
-		tf->command = ATA_CMD_FLUSH;
-
-	return 0;
-}
-
-/**
- *	scsi_6_lba_len - Get LBA and transfer length
- *	@scsicmd: SCSI command to translate
- *
- *	Calculate LBA and transfer length for 6-byte commands.
- *
- *	RETURNS:
- *	@plba: the LBA
- *	@plen: the transfer length
- */
-
-static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
-{
-	u64 lba = 0;
-	u32 len = 0;
-
-	VPRINTK("six-byte command\n");
-
-	lba |= ((u64)scsicmd[2]) << 8;
-	lba |= ((u64)scsicmd[3]);
-
-	len |= ((u32)scsicmd[4]);
-
-	*plba = lba;
-	*plen = len;
-}
-
-/**
- *	scsi_10_lba_len - Get LBA and transfer length
- *	@scsicmd: SCSI command to translate
- *
- *	Calculate LBA and transfer length for 10-byte commands.
- *
- *	RETURNS:
- *	@plba: the LBA
- *	@plen: the transfer length
- */
-
-static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
-{
-	u64 lba = 0;
-	u32 len = 0;
-
-	VPRINTK("ten-byte command\n");
-
-	lba |= ((u64)scsicmd[2]) << 24;
-	lba |= ((u64)scsicmd[3]) << 16;
-	lba |= ((u64)scsicmd[4]) << 8;
-	lba |= ((u64)scsicmd[5]);
-
-	len |= ((u32)scsicmd[7]) << 8;
-	len |= ((u32)scsicmd[8]);
-
-	*plba = lba;
-	*plen = len;
-}
-
-/**
- *	scsi_16_lba_len - Get LBA and transfer length
- *	@scsicmd: SCSI command to translate
- *
- *	Calculate LBA and transfer length for 16-byte commands.
- *
- *	RETURNS:
- *	@plba: the LBA
- *	@plen: the transfer length
- */
-
-static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
-{
-	u64 lba = 0;
-	u32 len = 0;
-
-	VPRINTK("sixteen-byte command\n");
-
-	lba |= ((u64)scsicmd[2]) << 56;
-	lba |= ((u64)scsicmd[3]) << 48;
-	lba |= ((u64)scsicmd[4]) << 40;
-	lba |= ((u64)scsicmd[5]) << 32;
-	lba |= ((u64)scsicmd[6]) << 24;
-	lba |= ((u64)scsicmd[7]) << 16;
-	lba |= ((u64)scsicmd[8]) << 8;
-	lba |= ((u64)scsicmd[9]);
-
-	len |= ((u32)scsicmd[10]) << 24;
-	len |= ((u32)scsicmd[11]) << 16;
-	len |= ((u32)scsicmd[12]) << 8;
-	len |= ((u32)scsicmd[13]);
-
-	*plba = lba;
-	*plen = len;
-}
-
-/**
- *	ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
- *	@qc: Storage for translated ATA taskfile
- *	@scsicmd: SCSI command to translate
- *
- *	Converts SCSI VERIFY command to an ATA READ VERIFY command.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
-	struct ata_taskfile *tf = &qc->tf;
-	struct ata_device *dev = qc->dev;
-	u64 dev_sectors = qc->dev->n_sectors;
-	u64 block;
-	u32 n_block;
-
-	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-	tf->protocol = ATA_PROT_NODATA;
-
-	if (scsicmd[0] == VERIFY)
-		scsi_10_lba_len(scsicmd, &block, &n_block);
-	else if (scsicmd[0] == VERIFY_16)
-		scsi_16_lba_len(scsicmd, &block, &n_block);
-	else
-		goto invalid_fld;
-
-	if (!n_block)
-		goto nothing_to_do;
-	if (block >= dev_sectors)
-		goto out_of_range;
-	if ((block + n_block) > dev_sectors)
-		goto out_of_range;
-
-	if (dev->flags & ATA_DFLAG_LBA) {
-		tf->flags |= ATA_TFLAG_LBA;
-
-		if (lba_28_ok(block, n_block)) {
-			/* use LBA28 */
-			tf->command = ATA_CMD_VERIFY;
-			tf->device |= (block >> 24) & 0xf;
-		} else if (lba_48_ok(block, n_block)) {
-			if (!(dev->flags & ATA_DFLAG_LBA48))
-				goto out_of_range;
-
-			/* use LBA48 */
-			tf->flags |= ATA_TFLAG_LBA48;
-			tf->command = ATA_CMD_VERIFY_EXT;
-
-			tf->hob_nsect = (n_block >> 8) & 0xff;
-
-			tf->hob_lbah = (block >> 40) & 0xff;
-			tf->hob_lbam = (block >> 32) & 0xff;
-			tf->hob_lbal = (block >> 24) & 0xff;
-		} else
-			/* request too large even for LBA48 */
-			goto out_of_range;
-
-		tf->nsect = n_block & 0xff;
-
-		tf->lbah = (block >> 16) & 0xff;
-		tf->lbam = (block >> 8) & 0xff;
-		tf->lbal = block & 0xff;
-
-		tf->device |= ATA_LBA;
-	} else {
-		/* CHS */
-		u32 sect, head, cyl, track;
-
-		if (!lba_28_ok(block, n_block))
-			goto out_of_range;
-
-		/* Convert LBA to CHS */
-		track = (u32)block / dev->sectors;
-		cyl   = track / dev->heads;
-		head  = track % dev->heads;
-		sect  = (u32)block % dev->sectors + 1;
-
-		DPRINTK("block %u track %u cyl %u head %u sect %u\n",
-			(u32)block, track, cyl, head, sect);
-
-		/* Check whether the converted CHS can fit.
-		   Cylinder: 0-65535
-		   Head: 0-15
-		   Sector: 1-255*/
-		if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
-			goto out_of_range;
-
-		tf->command = ATA_CMD_VERIFY;
-		tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
-		tf->lbal = sect;
-		tf->lbam = cyl;
-		tf->lbah = cyl >> 8;
-		tf->device |= head;
-	}
-
-	return 0;
-
-invalid_fld:
-	ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
-	/* "Invalid field in cbd" */
-	return 1;
-
-out_of_range:
-	ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
-	/* "Logical Block Address out of range" */
-	return 1;
-
-nothing_to_do:
-	qc->scsicmd->result = SAM_STAT_GOOD;
-	return 1;
-}
-
-/**
- *	ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
- *	@qc: Storage for translated ATA taskfile
- *	@scsicmd: SCSI command to translate
- *
- *	Converts any of six SCSI read/write commands into the
- *	ATA counterpart, including starting sector (LBA),
- *	sector count, and taking into account the device's LBA48
- *	support.
- *
- *	Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
- *	%WRITE_16 are currently supported.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
-	struct ata_taskfile *tf = &qc->tf;
-	struct ata_device *dev = qc->dev;
-	u64 block;
-	u32 n_block;
-
-	qc->flags |= ATA_QCFLAG_IO;
-	tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-
-	if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
-	    scsicmd[0] == WRITE_16)
-		tf->flags |= ATA_TFLAG_WRITE;
-
-	/* Calculate the SCSI LBA, transfer length and FUA. */
-	switch (scsicmd[0]) {
-	case READ_10:
-	case WRITE_10:
-		scsi_10_lba_len(scsicmd, &block, &n_block);
-		if (unlikely(scsicmd[1] & (1 << 3)))
-			tf->flags |= ATA_TFLAG_FUA;
-		break;
-	case READ_6:
-	case WRITE_6:
-		scsi_6_lba_len(scsicmd, &block, &n_block);
-
-		/* for 6-byte r/w commands, transfer length 0
-		 * means 256 blocks of data, not 0 block.
-		 */
-		if (!n_block)
-			n_block = 256;
-		break;
-	case READ_16:
-	case WRITE_16:
-		scsi_16_lba_len(scsicmd, &block, &n_block);
-		if (unlikely(scsicmd[1] & (1 << 3)))
-			tf->flags |= ATA_TFLAG_FUA;
-		break;
-	default:
-		DPRINTK("no-byte command\n");
-		goto invalid_fld;
-	}
-
-	/* Check and compose ATA command */
-	if (!n_block)
-		/* For 10-byte and 16-byte SCSI R/W commands, transfer
-		 * length 0 means transfer 0 block of data.
-		 * However, for ATA R/W commands, sector count 0 means
-		 * 256 or 65536 sectors, not 0 sectors as in SCSI.
-		 *
-		 * WARNING: one or two older ATA drives treat 0 as 0...
-		 */
-		goto nothing_to_do;
-
-	if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
-		/* yay, NCQ */
-		if (!lba_48_ok(block, n_block))
-			goto out_of_range;
-
-		tf->protocol = ATA_PROT_NCQ;
-		tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
-
-		if (tf->flags & ATA_TFLAG_WRITE)
-			tf->command = ATA_CMD_FPDMA_WRITE;
-		else
-			tf->command = ATA_CMD_FPDMA_READ;
-
-		qc->nsect = n_block;
-
-		tf->nsect = qc->tag << 3;
-		tf->hob_feature = (n_block >> 8) & 0xff;
-		tf->feature = n_block & 0xff;
-
-		tf->hob_lbah = (block >> 40) & 0xff;
-		tf->hob_lbam = (block >> 32) & 0xff;
-		tf->hob_lbal = (block >> 24) & 0xff;
-		tf->lbah = (block >> 16) & 0xff;
-		tf->lbam = (block >> 8) & 0xff;
-		tf->lbal = block & 0xff;
-
-		tf->device = 1 << 6;
-		if (tf->flags & ATA_TFLAG_FUA)
-			tf->device |= 1 << 7;
-	} else if (dev->flags & ATA_DFLAG_LBA) {
-		tf->flags |= ATA_TFLAG_LBA;
-
-		if (lba_28_ok(block, n_block)) {
-			/* use LBA28 */
-			tf->device |= (block >> 24) & 0xf;
-		} else if (lba_48_ok(block, n_block)) {
-			if (!(dev->flags & ATA_DFLAG_LBA48))
-				goto out_of_range;
-
-			/* use LBA48 */
-			tf->flags |= ATA_TFLAG_LBA48;
-
-			tf->hob_nsect = (n_block >> 8) & 0xff;
-
-			tf->hob_lbah = (block >> 40) & 0xff;
-			tf->hob_lbam = (block >> 32) & 0xff;
-			tf->hob_lbal = (block >> 24) & 0xff;
-		} else
-			/* request too large even for LBA48 */
-			goto out_of_range;
-
-		if (unlikely(ata_rwcmd_protocol(qc) < 0))
-			goto invalid_fld;
-
-		qc->nsect = n_block;
-		tf->nsect = n_block & 0xff;
-
-		tf->lbah = (block >> 16) & 0xff;
-		tf->lbam = (block >> 8) & 0xff;
-		tf->lbal = block & 0xff;
-
-		tf->device |= ATA_LBA;
-	} else {
-		/* CHS */
-		u32 sect, head, cyl, track;
-
-		/* The request -may- be too large for CHS addressing. */
-		if (!lba_28_ok(block, n_block))
-			goto out_of_range;
-
-		if (unlikely(ata_rwcmd_protocol(qc) < 0))
-			goto invalid_fld;
-
-		/* Convert LBA to CHS */
-		track = (u32)block / dev->sectors;
-		cyl   = track / dev->heads;
-		head  = track % dev->heads;
-		sect  = (u32)block % dev->sectors + 1;
-
-		DPRINTK("block %u track %u cyl %u head %u sect %u\n",
-			(u32)block, track, cyl, head, sect);
-
-		/* Check whether the converted CHS can fit.
-		   Cylinder: 0-65535
-		   Head: 0-15
-		   Sector: 1-255*/
-		if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
-			goto out_of_range;
-
-		qc->nsect = n_block;
-		tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
-		tf->lbal = sect;
-		tf->lbam = cyl;
-		tf->lbah = cyl >> 8;
-		tf->device |= head;
-	}
-
-	return 0;
-
-invalid_fld:
-	ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
-	/* "Invalid field in cbd" */
-	return 1;
-
-out_of_range:
-	ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
-	/* "Logical Block Address out of range" */
-	return 1;
-
-nothing_to_do:
-	qc->scsicmd->result = SAM_STAT_GOOD;
-	return 1;
-}
-
-static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
-{
-	struct scsi_cmnd *cmd = qc->scsicmd;
-	u8 *cdb = cmd->cmnd;
- 	int need_sense = (qc->err_mask != 0);
-
-	/* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
-	 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
-	 * cache
-	 */
-	if (!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
-	    ((qc->tf.feature == SETFEATURES_WC_ON) ||
-	     (qc->tf.feature == SETFEATURES_WC_OFF))) {
-		qc->ap->eh_info.action |= ATA_EH_REVALIDATE;
-		ata_port_schedule_eh(qc->ap);
-	}
-
-	/* For ATA pass thru (SAT) commands, generate a sense block if
-	 * user mandated it or if there's an error.  Note that if we
-	 * generate because the user forced us to, a check condition
-	 * is generated and the ATA register values are returned
-	 * whether the command completed successfully or not. If there
-	 * was no error, SK, ASC and ASCQ will all be zero.
-	 */
-	if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
- 	    ((cdb[2] & 0x20) || need_sense)) {
- 		ata_gen_ata_desc_sense(qc);
-	} else {
-		if (!need_sense) {
-			cmd->result = SAM_STAT_GOOD;
-		} else {
-			/* TODO: decide which descriptor format to use
-			 * for 48b LBA devices and call that here
-			 * instead of the fixed desc, which is only
-			 * good for smaller LBA (and maybe CHS?)
-			 * devices.
-			 */
-			ata_gen_fixed_sense(qc);
-		}
-	}
-
-	if (need_sense && !qc->ap->ops->error_handler)
-		ata_dump_status(qc->ap->id, &qc->result_tf);
-
-	qc->scsidone(cmd);
-
-	ata_qc_free(qc);
-}
-
-/**
- *	ata_scmd_need_defer - Check whether we need to defer scmd
- *	@dev: ATA device to which the command is addressed
- *	@is_io: Is the command IO (and thus possibly NCQ)?
- *
- *	NCQ and non-NCQ commands cannot run together.  As upper layer
- *	only knows the queue depth, we are responsible for maintaining
- *	exclusion.  This function checks whether a new command can be
- *	issued to @dev.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	1 if deferring is needed, 0 otherwise.
- */
-static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
-{
-	struct ata_port *ap = dev->ap;
-
-	if (!(dev->flags & ATA_DFLAG_NCQ))
-		return 0;
-
-	if (is_io) {
-		if (!ata_tag_valid(ap->active_tag))
-			return 0;
-	} else {
-		if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
-			return 0;
-	}
-	return 1;
-}
-
-/**
- *	ata_scsi_translate - Translate then issue SCSI command to ATA device
- *	@dev: ATA device to which the command is addressed
- *	@cmd: SCSI command to execute
- *	@done: SCSI command completion function
- *	@xlat_func: Actor which translates @cmd to an ATA taskfile
- *
- *	Our ->queuecommand() function has decided that the SCSI
- *	command issued can be directly translated into an ATA
- *	command, rather than handled internally.
- *
- *	This function sets up an ata_queued_cmd structure for the
- *	SCSI command, and sends that ata_queued_cmd to the hardware.
- *
- *	The xlat_func argument (actor) returns 0 if ready to execute
- *	ATA command, else 1 to finish translation. If 1 is returned
- *	then cmd->result (and possibly cmd->sense_buffer) are assumed
- *	to be set reflecting an error condition or clean (early)
- *	termination.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
- *	needs to be deferred.
- */
-static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
-			      void (*done)(struct scsi_cmnd *),
-			      ata_xlat_func_t xlat_func)
-{
-	struct ata_queued_cmd *qc;
-	u8 *scsicmd = cmd->cmnd;
-	int is_io = xlat_func == ata_scsi_rw_xlat;
-
-	VPRINTK("ENTER\n");
-
-	if (unlikely(ata_scmd_need_defer(dev, is_io)))
-		goto defer;
-
-	qc = ata_scsi_qc_new(dev, cmd, done);
-	if (!qc)
-		goto err_mem;
-
-	/* data is present; dma-map it */
-	if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
-	    cmd->sc_data_direction == DMA_TO_DEVICE) {
-		if (unlikely(cmd->request_bufflen < 1)) {
-			ata_dev_printk(dev, KERN_WARNING,
-				       "WARNING: zero len r/w req\n");
-			goto err_did;
-		}
-
-		if (cmd->use_sg)
-			ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
-		else
-			ata_sg_init_one(qc, cmd->request_buffer,
-					cmd->request_bufflen);
-
-		qc->dma_dir = cmd->sc_data_direction;
-	}
-
-	qc->complete_fn = ata_scsi_qc_complete;
-
-	if (xlat_func(qc, scsicmd))
-		goto early_finish;
-
-	/* select device, send command to hardware */
-	ata_qc_issue(qc);
-
-	VPRINTK("EXIT\n");
-	return 0;
-
-early_finish:
-        ata_qc_free(qc);
-	done(cmd);
-	DPRINTK("EXIT - early finish (good or error)\n");
-	return 0;
-
-err_did:
-	ata_qc_free(qc);
-err_mem:
-	cmd->result = (DID_ERROR << 16);
-	done(cmd);
-	DPRINTK("EXIT - internal\n");
-	return 0;
-
-defer:
-	DPRINTK("EXIT - defer\n");
-	return SCSI_MLQUEUE_DEVICE_BUSY;
-}
-
-/**
- *	ata_scsi_rbuf_get - Map response buffer.
- *	@cmd: SCSI command containing buffer to be mapped.
- *	@buf_out: Pointer to mapped area.
- *
- *	Maps buffer contained within SCSI command @cmd.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Length of response buffer.
- */
-
-static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
-{
-	u8 *buf;
-	unsigned int buflen;
-
-	if (cmd->use_sg) {
-		struct scatterlist *sg;
-
-		sg = (struct scatterlist *) cmd->request_buffer;
-		buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
-		buflen = sg->length;
-	} else {
-		buf = cmd->request_buffer;
-		buflen = cmd->request_bufflen;
-	}
-
-	*buf_out = buf;
-	return buflen;
-}
-
-/**
- *	ata_scsi_rbuf_put - Unmap response buffer.
- *	@cmd: SCSI command containing buffer to be unmapped.
- *	@buf: buffer to unmap
- *
- *	Unmaps response buffer contained within @cmd.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
-{
-	if (cmd->use_sg) {
-		struct scatterlist *sg;
-
-		sg = (struct scatterlist *) cmd->request_buffer;
-		kunmap_atomic(buf - sg->offset, KM_USER0);
-	}
-}
-
-/**
- *	ata_scsi_rbuf_fill - wrapper for SCSI command simulators
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@actor: Callback hook for desired SCSI command simulator
- *
- *	Takes care of the hard work of simulating a SCSI command...
- *	Mapping the response buffer, calling the command's handler,
- *	and handling the handler's return value.  This return value
- *	indicates whether the handler wishes the SCSI command to be
- *	completed successfully (0), or not (in which case cmd->result
- *	and sense buffer are assumed to be set).
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
-		        unsigned int (*actor) (struct ata_scsi_args *args,
-			     		   u8 *rbuf, unsigned int buflen))
-{
-	u8 *rbuf;
-	unsigned int buflen, rc;
-	struct scsi_cmnd *cmd = args->cmd;
-
-	buflen = ata_scsi_rbuf_get(cmd, &rbuf);
-	memset(rbuf, 0, buflen);
-	rc = actor(args, rbuf, buflen);
-	ata_scsi_rbuf_put(cmd, rbuf);
-
-	if (rc == 0)
-		cmd->result = SAM_STAT_GOOD;
-	args->done(cmd);
-}
-
-/**
- *	ata_scsiop_inq_std - Simulate INQUIRY command
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Returns standard device identification data associated
- *	with non-VPD INQUIRY command output.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
-			       unsigned int buflen)
-{
-	u8 hdr[] = {
-		TYPE_DISK,
-		0,
-		0x5,	/* claim SPC-3 version compatibility */
-		2,
-		95 - 4
-	};
-
-	/* set scsi removeable (RMB) bit per ata bit */
-	if (ata_id_removeable(args->id))
-		hdr[1] |= (1 << 7);
-
-	VPRINTK("ENTER\n");
-
-	memcpy(rbuf, hdr, sizeof(hdr));
-
-	if (buflen > 35) {
-		memcpy(&rbuf[8], "ATA     ", 8);
-		ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
-		ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
-		if (rbuf[32] == 0 || rbuf[32] == ' ')
-			memcpy(&rbuf[32], "n/a ", 4);
-	}
-
-	if (buflen > 63) {
-		const u8 versions[] = {
-			0x60,	/* SAM-3 (no version claimed) */
-
-			0x03,
-			0x20,	/* SBC-2 (no version claimed) */
-
-			0x02,
-			0x60	/* SPC-3 (no version claimed) */
-		};
-
-		memcpy(rbuf + 59, versions, sizeof(versions));
-	}
-
-	return 0;
-}
-
-/**
- *	ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Returns list of inquiry VPD pages available.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
-			      unsigned int buflen)
-{
-	const u8 pages[] = {
-		0x00,	/* page 0x00, this page */
-		0x80,	/* page 0x80, unit serial no page */
-		0x83	/* page 0x83, device ident page */
-	};
-	rbuf[3] = sizeof(pages);	/* number of supported VPD pages */
-
-	if (buflen > 6)
-		memcpy(rbuf + 4, pages, sizeof(pages));
-
-	return 0;
-}
-
-/**
- *	ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Returns ATA device serial number.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
-			      unsigned int buflen)
-{
-	const u8 hdr[] = {
-		0,
-		0x80,			/* this page code */
-		0,
-		ATA_SERNO_LEN,		/* page len */
-	};
-	memcpy(rbuf, hdr, sizeof(hdr));
-
-	if (buflen > (ATA_SERNO_LEN + 4 - 1))
-		ata_id_string(args->id, (unsigned char *) &rbuf[4],
-			      ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
-
-	return 0;
-}
-
-/**
- *	ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Yields two logical unit device identification designators:
- *	 - vendor specific ASCII containing the ATA serial number
- *	 - SAT defined "t10 vendor id based" containing ASCII vendor
- *	   name ("ATA     "), model and serial numbers.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
-			      unsigned int buflen)
-{
-	int num;
-	const int sat_model_serial_desc_len = 68;
-	const int ata_model_byte_len = 40;
-
-	rbuf[1] = 0x83;			/* this page code */
-	num = 4;
-
-	if (buflen > (ATA_SERNO_LEN + num + 3)) {
-		/* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
-		rbuf[num + 0] = 2;
-		rbuf[num + 3] = ATA_SERNO_LEN;
-		num += 4;
-		ata_id_string(args->id, (unsigned char *) rbuf + num,
-			      ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
-		num += ATA_SERNO_LEN;
-	}
-	if (buflen > (sat_model_serial_desc_len + num + 3)) {
-		/* SAT defined lu model and serial numbers descriptor */
-		/* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
-		rbuf[num + 0] = 2;
-		rbuf[num + 1] = 1;
-		rbuf[num + 3] = sat_model_serial_desc_len;
-		num += 4;
-		memcpy(rbuf + num, "ATA     ", 8);
-		num += 8;
-		ata_id_string(args->id, (unsigned char *) rbuf + num,
-			      ATA_ID_PROD_OFS, ata_model_byte_len);
-		num += ata_model_byte_len;
-		ata_id_string(args->id, (unsigned char *) rbuf + num,
-			      ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
-		num += ATA_SERNO_LEN;
-	}
-	rbuf[3] = num - 4;    /* page len (assume less than 256 bytes) */
-	return 0;
-}
-
-/**
- *	ata_scsiop_noop - Command handler that simply returns success.
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	No operation.  Simply returns success to caller, to indicate
- *	that the caller should successfully complete this SCSI command.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
-			    unsigned int buflen)
-{
-	VPRINTK("ENTER\n");
-	return 0;
-}
-
-/**
- *	ata_msense_push - Push data onto MODE SENSE data output buffer
- *	@ptr_io: (input/output) Location to store more output data
- *	@last: End of output data buffer
- *	@buf: Pointer to BLOB being added to output buffer
- *	@buflen: Length of BLOB
- *
- *	Store MODE SENSE data on an output buffer.
- *
- *	LOCKING:
- *	None.
- */
-
-static void ata_msense_push(u8 **ptr_io, const u8 *last,
-			    const u8 *buf, unsigned int buflen)
-{
-	u8 *ptr = *ptr_io;
-
-	if ((ptr + buflen - 1) > last)
-		return;
-
-	memcpy(ptr, buf, buflen);
-
-	ptr += buflen;
-
-	*ptr_io = ptr;
-}
-
-/**
- *	ata_msense_caching - Simulate MODE SENSE caching info page
- *	@id: device IDENTIFY data
- *	@ptr_io: (input/output) Location to store more output data
- *	@last: End of output data buffer
- *
- *	Generate a caching info page, which conditionally indicates
- *	write caching to the SCSI layer, depending on device
- *	capabilities.
- *
- *	LOCKING:
- *	None.
- */
-
-static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
-				       const u8 *last)
-{
-	u8 page[CACHE_MPAGE_LEN];
-
-	memcpy(page, def_cache_mpage, sizeof(page));
-	if (ata_id_wcache_enabled(id))
-		page[2] |= (1 << 2);	/* write cache enable */
-	if (!ata_id_rahead_enabled(id))
-		page[12] |= (1 << 5);	/* disable read ahead */
-
-	ata_msense_push(ptr_io, last, page, sizeof(page));
-	return sizeof(page);
-}
-
-/**
- *	ata_msense_ctl_mode - Simulate MODE SENSE control mode page
- *	@dev: Device associated with this MODE SENSE command
- *	@ptr_io: (input/output) Location to store more output data
- *	@last: End of output data buffer
- *
- *	Generate a generic MODE SENSE control mode page.
- *
- *	LOCKING:
- *	None.
- */
-
-static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
-{
-	ata_msense_push(ptr_io, last, def_control_mpage,
-			sizeof(def_control_mpage));
-	return sizeof(def_control_mpage);
-}
-
-/**
- *	ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
- *	@dev: Device associated with this MODE SENSE command
- *	@ptr_io: (input/output) Location to store more output data
- *	@last: End of output data buffer
- *
- *	Generate a generic MODE SENSE r/w error recovery page.
- *
- *	LOCKING:
- *	None.
- */
-
-static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
-{
-
-	ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
-			sizeof(def_rw_recovery_mpage));
-	return sizeof(def_rw_recovery_mpage);
-}
-
-/*
- * We can turn this into a real blacklist if it's needed, for now just
- * blacklist any Maxtor BANC1G10 revision firmware
- */
-static int ata_dev_supports_fua(u16 *id)
-{
-	unsigned char model[41], fw[9];
-
-	if (!libata_fua)
-		return 0;
-	if (!ata_id_has_fua(id))
-		return 0;
-
-	ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
-	ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
-
-	if (strcmp(model, "Maxtor"))
-		return 1;
-	if (strcmp(fw, "BANC1G10"))
-		return 1;
-
-	return 0; /* blacklisted */
-}
-
-/**
- *	ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Simulate MODE SENSE commands. Assume this is invoked for direct
- *	access devices (e.g. disks) only. There should be no block
- *	descriptor for other device types.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
-				  unsigned int buflen)
-{
-	struct ata_device *dev = args->dev;
-	u8 *scsicmd = args->cmd->cmnd, *p, *last;
-	const u8 sat_blk_desc[] = {
-		0, 0, 0, 0,	/* number of blocks: sat unspecified */
-		0,
-		0, 0x2, 0x0	/* block length: 512 bytes */
-	};
-	u8 pg, spg;
-	unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
-	u8 dpofua;
-
-	VPRINTK("ENTER\n");
-
-	six_byte = (scsicmd[0] == MODE_SENSE);
-	ebd = !(scsicmd[1] & 0x8);      /* dbd bit inverted == edb */
-	/*
-	 * LLBA bit in msense(10) ignored (compliant)
-	 */
-
-	page_control = scsicmd[2] >> 6;
-	switch (page_control) {
-	case 0: /* current */
-		break;  /* supported */
-	case 3: /* saved */
-		goto saving_not_supp;
-	case 1: /* changeable */
-	case 2: /* defaults */
-	default:
-		goto invalid_fld;
-	}
-
-	if (six_byte) {
-		output_len = 4 + (ebd ? 8 : 0);
-		alloc_len = scsicmd[4];
-	} else {
-		output_len = 8 + (ebd ? 8 : 0);
-		alloc_len = (scsicmd[7] << 8) + scsicmd[8];
-	}
-	minlen = (alloc_len < buflen) ? alloc_len : buflen;
-
-	p = rbuf + output_len;
-	last = rbuf + minlen - 1;
-
-	pg = scsicmd[2] & 0x3f;
-	spg = scsicmd[3];
-	/*
-	 * No mode subpages supported (yet) but asking for _all_
-	 * subpages may be valid
-	 */
-	if (spg && (spg != ALL_SUB_MPAGES))
-		goto invalid_fld;
-
-	switch(pg) {
-	case RW_RECOVERY_MPAGE:
-		output_len += ata_msense_rw_recovery(&p, last);
-		break;
-
-	case CACHE_MPAGE:
-		output_len += ata_msense_caching(args->id, &p, last);
-		break;
-
-	case CONTROL_MPAGE: {
-		output_len += ata_msense_ctl_mode(&p, last);
-		break;
-		}
-
-	case ALL_MPAGES:
-		output_len += ata_msense_rw_recovery(&p, last);
-		output_len += ata_msense_caching(args->id, &p, last);
-		output_len += ata_msense_ctl_mode(&p, last);
-		break;
-
-	default:		/* invalid page code */
-		goto invalid_fld;
-	}
-
-	if (minlen < 1)
-		return 0;
-
-	dpofua = 0;
-	if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
-	    (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
-		dpofua = 1 << 4;
-
-	if (six_byte) {
-		output_len--;
-		rbuf[0] = output_len;
-		if (minlen > 2)
-			rbuf[2] |= dpofua;
-		if (ebd) {
-			if (minlen > 3)
-				rbuf[3] = sizeof(sat_blk_desc);
-			if (minlen > 11)
-				memcpy(rbuf + 4, sat_blk_desc,
-				       sizeof(sat_blk_desc));
-		}
-	} else {
-		output_len -= 2;
-		rbuf[0] = output_len >> 8;
-		if (minlen > 1)
-			rbuf[1] = output_len;
-		if (minlen > 3)
-			rbuf[3] |= dpofua;
-		if (ebd) {
-			if (minlen > 7)
-				rbuf[7] = sizeof(sat_blk_desc);
-			if (minlen > 15)
-				memcpy(rbuf + 8, sat_blk_desc,
-				       sizeof(sat_blk_desc));
-		}
-	}
-	return 0;
-
-invalid_fld:
-	ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
-	/* "Invalid field in cbd" */
-	return 1;
-
-saving_not_supp:
-	ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
-	 /* "Saving parameters not supported" */
-	return 1;
-}
-
-/**
- *	ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Simulate READ CAPACITY commands.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
-			        unsigned int buflen)
-{
-	u64 n_sectors;
-	u32 tmp;
-
-	VPRINTK("ENTER\n");
-
-	if (ata_id_has_lba(args->id)) {
-		if (ata_id_has_lba48(args->id))
-			n_sectors = ata_id_u64(args->id, 100);
-		else
-			n_sectors = ata_id_u32(args->id, 60);
-	} else {
-		/* CHS default translation */
-		n_sectors = args->id[1] * args->id[3] * args->id[6];
-
-		if (ata_id_current_chs_valid(args->id))
-			/* CHS current translation */
-			n_sectors = ata_id_u32(args->id, 57);
-	}
-
-	n_sectors--;		/* ATA TotalUserSectors - 1 */
-
-	if (args->cmd->cmnd[0] == READ_CAPACITY) {
-		if( n_sectors >= 0xffffffffULL )
-			tmp = 0xffffffff ;  /* Return max count on overflow */
-		else
-			tmp = n_sectors ;
-
-		/* sector count, 32-bit */
-		rbuf[0] = tmp >> (8 * 3);
-		rbuf[1] = tmp >> (8 * 2);
-		rbuf[2] = tmp >> (8 * 1);
-		rbuf[3] = tmp;
-
-		/* sector size */
-		tmp = ATA_SECT_SIZE;
-		rbuf[6] = tmp >> 8;
-		rbuf[7] = tmp;
-
-	} else {
-		/* sector count, 64-bit */
-		tmp = n_sectors >> (8 * 4);
-		rbuf[2] = tmp >> (8 * 3);
-		rbuf[3] = tmp >> (8 * 2);
-		rbuf[4] = tmp >> (8 * 1);
-		rbuf[5] = tmp;
-		tmp = n_sectors;
-		rbuf[6] = tmp >> (8 * 3);
-		rbuf[7] = tmp >> (8 * 2);
-		rbuf[8] = tmp >> (8 * 1);
-		rbuf[9] = tmp;
-
-		/* sector size */
-		tmp = ATA_SECT_SIZE;
-		rbuf[12] = tmp >> 8;
-		rbuf[13] = tmp;
-	}
-
-	return 0;
-}
-
-/**
- *	ata_scsiop_report_luns - Simulate REPORT LUNS command
- *	@args: device IDENTIFY data / SCSI command of interest.
- *	@rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- *	@buflen: Response buffer length.
- *
- *	Simulate REPORT LUNS command.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
-				   unsigned int buflen)
-{
-	VPRINTK("ENTER\n");
-	rbuf[3] = 8;	/* just one lun, LUN 0, size 8 bytes */
-
-	return 0;
-}
-
-/**
- *	ata_scsi_set_sense - Set SCSI sense data and status
- *	@cmd: SCSI request to be handled
- *	@sk: SCSI-defined sense key
- *	@asc: SCSI-defined additional sense code
- *	@ascq: SCSI-defined additional sense code qualifier
- *
- *	Helper function that builds a valid fixed format, current
- *	response code and the given sense key (sk), additional sense
- *	code (asc) and additional sense code qualifier (ascq) with
- *	a SCSI command status of %SAM_STAT_CHECK_CONDITION and
- *	DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
- *
- *	LOCKING:
- *	Not required
- */
-
-void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
-{
-	cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
-
-	cmd->sense_buffer[0] = 0x70;	/* fixed format, current */
-	cmd->sense_buffer[2] = sk;
-	cmd->sense_buffer[7] = 18 - 8;	/* additional sense length */
-	cmd->sense_buffer[12] = asc;
-	cmd->sense_buffer[13] = ascq;
-}
-
-/**
- *	ata_scsi_badcmd - End a SCSI request with an error
- *	@cmd: SCSI request to be handled
- *	@done: SCSI command completion function
- *	@asc: SCSI-defined additional sense code
- *	@ascq: SCSI-defined additional sense code qualifier
- *
- *	Helper function that completes a SCSI command with
- *	%SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
- *	and the specified additional sense codes.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
-{
-	DPRINTK("ENTER\n");
-	ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
-
-	done(cmd);
-}
-
-static void atapi_sense_complete(struct ata_queued_cmd *qc)
-{
-	if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
-		/* FIXME: not quite right; we don't want the
-		 * translation of taskfile registers into
-		 * a sense descriptors, since that's only
-		 * correct for ATA, not ATAPI
-		 */
-		ata_gen_ata_desc_sense(qc);
-	}
-
-	qc->scsidone(qc->scsicmd);
-	ata_qc_free(qc);
-}
-
-/* is it pointless to prefer PIO for "safety reasons"? */
-static inline int ata_pio_use_silly(struct ata_port *ap)
-{
-	return (ap->flags & ATA_FLAG_PIO_DMA);
-}
-
-static void atapi_request_sense(struct ata_queued_cmd *qc)
-{
-	struct ata_port *ap = qc->ap;
-	struct scsi_cmnd *cmd = qc->scsicmd;
-
-	DPRINTK("ATAPI request sense\n");
-
-	/* FIXME: is this needed? */
-	memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
-
-	ap->ops->tf_read(ap, &qc->tf);
-
-	/* fill these in, for the case where they are -not- overwritten */
-	cmd->sense_buffer[0] = 0x70;
-	cmd->sense_buffer[2] = qc->tf.feature >> 4;
-
-	ata_qc_reinit(qc);
-
-	ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
-	qc->dma_dir = DMA_FROM_DEVICE;
-
-	memset(&qc->cdb, 0, qc->dev->cdb_len);
-	qc->cdb[0] = REQUEST_SENSE;
-	qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
-
-	qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-	qc->tf.command = ATA_CMD_PACKET;
-
-	if (ata_pio_use_silly(ap)) {
-		qc->tf.protocol = ATA_PROT_ATAPI_DMA;
-		qc->tf.feature |= ATAPI_PKT_DMA;
-	} else {
-		qc->tf.protocol = ATA_PROT_ATAPI;
-		qc->tf.lbam = (8 * 1024) & 0xff;
-		qc->tf.lbah = (8 * 1024) >> 8;
-	}
-	qc->nbytes = SCSI_SENSE_BUFFERSIZE;
-
-	qc->complete_fn = atapi_sense_complete;
-
-	ata_qc_issue(qc);
-
-	DPRINTK("EXIT\n");
-}
-
-static void atapi_qc_complete(struct ata_queued_cmd *qc)
-{
-	struct scsi_cmnd *cmd = qc->scsicmd;
-	unsigned int err_mask = qc->err_mask;
-
-	VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
-
-	/* handle completion from new EH */
-	if (unlikely(qc->ap->ops->error_handler &&
-		     (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
-
-		if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
-			/* FIXME: not quite right; we don't want the
-			 * translation of taskfile registers into a
-			 * sense descriptors, since that's only
-			 * correct for ATA, not ATAPI
-			 */
-			ata_gen_ata_desc_sense(qc);
-		}
-
-		/* SCSI EH automatically locks door if sdev->locked is
-		 * set.  Sometimes door lock request continues to
-		 * fail, for example, when no media is present.  This
-		 * creates a loop - SCSI EH issues door lock which
-		 * fails and gets invoked again to acquire sense data
-		 * for the failed command.
-		 *
-		 * If door lock fails, always clear sdev->locked to
-		 * avoid this infinite loop.
-		 */
-		if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
-			qc->dev->sdev->locked = 0;
-
-		qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
-		qc->scsidone(cmd);
-		ata_qc_free(qc);
-		return;
-	}
-
-	/* successful completion or old EH failure path */
-	if (unlikely(err_mask & AC_ERR_DEV)) {
-		cmd->result = SAM_STAT_CHECK_CONDITION;
-		atapi_request_sense(qc);
-		return;
-	} else if (unlikely(err_mask)) {
-		/* FIXME: not quite right; we don't want the
-		 * translation of taskfile registers into
-		 * a sense descriptors, since that's only
-		 * correct for ATA, not ATAPI
-		 */
-		ata_gen_ata_desc_sense(qc);
-	} else {
-		u8 *scsicmd = cmd->cmnd;
-
-		if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
-			u8 *buf = NULL;
-			unsigned int buflen;
-
-			buflen = ata_scsi_rbuf_get(cmd, &buf);
-
-	/* ATAPI devices typically report zero for their SCSI version,
-	 * and sometimes deviate from the spec WRT response data
-	 * format.  If SCSI version is reported as zero like normal,
-	 * then we make the following fixups:  1) Fake MMC-5 version,
-	 * to indicate to the Linux scsi midlayer this is a modern
-	 * device.  2) Ensure response data format / ATAPI information
-	 * are always correct.
-	 */
-			if (buf[2] == 0) {
-				buf[2] = 0x5;
-				buf[3] = 0x32;
-			}
-
-			ata_scsi_rbuf_put(cmd, buf);
-		}
-
-		cmd->result = SAM_STAT_GOOD;
-	}
-
-	qc->scsidone(cmd);
-	ata_qc_free(qc);
-}
-/**
- *	atapi_xlat - Initialize PACKET taskfile
- *	@qc: command structure to be initialized
- *	@scsicmd: SCSI CDB associated with this PACKET command
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Zero on success, non-zero on failure.
- */
-
-static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
-	struct scsi_cmnd *cmd = qc->scsicmd;
-	struct ata_device *dev = qc->dev;
-	int using_pio = (dev->flags & ATA_DFLAG_PIO);
-	int nodata = (cmd->sc_data_direction == DMA_NONE);
-
-	if (!using_pio)
-		/* Check whether ATAPI DMA is safe */
-		if (ata_check_atapi_dma(qc))
-			using_pio = 1;
-
-	memcpy(&qc->cdb, scsicmd, dev->cdb_len);
-
-	qc->complete_fn = atapi_qc_complete;
-
-	qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-	if (cmd->sc_data_direction == DMA_TO_DEVICE) {
-		qc->tf.flags |= ATA_TFLAG_WRITE;
-		DPRINTK("direction: write\n");
-	}
-
-	qc->tf.command = ATA_CMD_PACKET;
-
-	/* no data, or PIO data xfer */
-	if (using_pio || nodata) {
-		if (nodata)
-			qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
-		else
-			qc->tf.protocol = ATA_PROT_ATAPI;
-		qc->tf.lbam = (8 * 1024) & 0xff;
-		qc->tf.lbah = (8 * 1024) >> 8;
-	}
-
-	/* DMA data xfer */
-	else {
-		qc->tf.protocol = ATA_PROT_ATAPI_DMA;
-		qc->tf.feature |= ATAPI_PKT_DMA;
-
-		if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
-			/* some SATA bridges need us to indicate data xfer direction */
-			qc->tf.feature |= ATAPI_DMADIR;
-	}
-
-	qc->nbytes = cmd->request_bufflen;
-
-	return 0;
-}
-
-static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
-{
-	if (likely(id < ATA_MAX_DEVICES))
-		return &ap->device[id];
-	return NULL;
-}
-
-static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
-					const struct scsi_device *scsidev)
-{
-	/* skip commands not addressed to targets we simulate */
-	if (unlikely(scsidev->channel || scsidev->lun))
-		return NULL;
-
-	return ata_find_dev(ap, scsidev->id);
-}
-
-/**
- *	ata_scsi_dev_enabled - determine if device is enabled
- *	@dev: ATA device
- *
- *	Determine if commands should be sent to the specified device.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	0 if commands are not allowed / 1 if commands are allowed
- */
-
-static int ata_scsi_dev_enabled(struct ata_device *dev)
-{
-	if (unlikely(!ata_dev_enabled(dev)))
-		return 0;
-
-	if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
-		if (unlikely(dev->class == ATA_DEV_ATAPI)) {
-			ata_dev_printk(dev, KERN_WARNING,
-				       "WARNING: ATAPI is %s, device ignored.\n",
-				       atapi_enabled ? "not supported with this driver" : "disabled");
-			return 0;
-		}
-	}
-
-	return 1;
-}
-
-/**
- *	ata_scsi_find_dev - lookup ata_device from scsi_cmnd
- *	@ap: ATA port to which the device is attached
- *	@scsidev: SCSI device from which we derive the ATA device
- *
- *	Given various information provided in struct scsi_cmnd,
- *	map that onto an ATA bus, and using that mapping
- *	determine which ata_device is associated with the
- *	SCSI command to be sent.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	Associated ATA device, or %NULL if not found.
- */
-static struct ata_device *
-ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
-{
-	struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
-
-	if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
-		return NULL;
-
-	return dev;
-}
-
-/*
- *	ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
- *	@byte1: Byte 1 from pass-thru CDB.
- *
- *	RETURNS:
- *	ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
- */
-static u8
-ata_scsi_map_proto(u8 byte1)
-{
-	switch((byte1 & 0x1e) >> 1) {
-		case 3:		/* Non-data */
-			return ATA_PROT_NODATA;
-
-		case 6:		/* DMA */
-			return ATA_PROT_DMA;
-
-		case 4:		/* PIO Data-in */
-		case 5:		/* PIO Data-out */
-			return ATA_PROT_PIO;
-
-		case 10:	/* Device Reset */
-		case 0:		/* Hard Reset */
-		case 1:		/* SRST */
-		case 2:		/* Bus Idle */
-		case 7:		/* Packet */
-		case 8:		/* DMA Queued */
-		case 9:		/* Device Diagnostic */
-		case 11:	/* UDMA Data-in */
-		case 12:	/* UDMA Data-Out */
-		case 13:	/* FPDMA */
-		default:	/* Reserved */
-			break;
-	}
-
-	return ATA_PROT_UNKNOWN;
-}
-
-/**
- *	ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
- *	@qc: command structure to be initialized
- *	@scsicmd: SCSI command to convert
- *
- *	Handles either 12 or 16-byte versions of the CDB.
- *
- *	RETURNS:
- *	Zero on success, non-zero on failure.
- */
-static unsigned int
-ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
-	struct ata_taskfile *tf = &(qc->tf);
-	struct scsi_cmnd *cmd = qc->scsicmd;
-	struct ata_device *dev = qc->dev;
-
-	if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
-		goto invalid_fld;
-
-	/* We may not issue DMA commands if no DMA mode is set */
-	if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
-		goto invalid_fld;
-
-	if (scsicmd[1] & 0xe0)
-		/* PIO multi not supported yet */
-		goto invalid_fld;
-
-	/*
-	 * 12 and 16 byte CDBs use different offsets to
-	 * provide the various register values.
-	 */
-	if (scsicmd[0] == ATA_16) {
-		/*
-		 * 16-byte CDB - may contain extended commands.
-		 *
-		 * If that is the case, copy the upper byte register values.
-		 */
-		if (scsicmd[1] & 0x01) {
-			tf->hob_feature = scsicmd[3];
-			tf->hob_nsect = scsicmd[5];
-			tf->hob_lbal = scsicmd[7];
-			tf->hob_lbam = scsicmd[9];
-			tf->hob_lbah = scsicmd[11];
-			tf->flags |= ATA_TFLAG_LBA48;
-		} else
-			tf->flags &= ~ATA_TFLAG_LBA48;
-
-		/*
-		 * Always copy low byte, device and command registers.
-		 */
-		tf->feature = scsicmd[4];
-		tf->nsect = scsicmd[6];
-		tf->lbal = scsicmd[8];
-		tf->lbam = scsicmd[10];
-		tf->lbah = scsicmd[12];
-		tf->device = scsicmd[13];
-		tf->command = scsicmd[14];
-	} else {
-		/*
-		 * 12-byte CDB - incapable of extended commands.
-		 */
-		tf->flags &= ~ATA_TFLAG_LBA48;
-
-		tf->feature = scsicmd[3];
-		tf->nsect = scsicmd[4];
-		tf->lbal = scsicmd[5];
-		tf->lbam = scsicmd[6];
-		tf->lbah = scsicmd[7];
-		tf->device = scsicmd[8];
-		tf->command = scsicmd[9];
-	}
-	/*
-	 * If slave is possible, enforce correct master/slave bit
-	*/
-	if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
-		tf->device = qc->dev->devno ?
-			tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
-
-	/*
-	 * Filter SET_FEATURES - XFER MODE command -- otherwise,
-	 * SET_FEATURES - XFER MODE must be preceded/succeeded
-	 * by an update to hardware-specific registers for each
-	 * controller (i.e. the reason for ->set_piomode(),
-	 * ->set_dmamode(), and ->post_set_mode() hooks).
-	 */
-	if ((tf->command == ATA_CMD_SET_FEATURES)
-	 && (tf->feature == SETFEATURES_XFER))
-		goto invalid_fld;
-
-	/*
-	 * Set flags so that all registers will be written,
-	 * and pass on write indication (used for PIO/DMA
-	 * setup.)
-	 */
-	tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
-
-	if (cmd->sc_data_direction == DMA_TO_DEVICE)
-		tf->flags |= ATA_TFLAG_WRITE;
-
-	/*
-	 * Set transfer length.
-	 *
-	 * TODO: find out if we need to do more here to
-	 *       cover scatter/gather case.
-	 */
-	qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
-
-	/* request result TF */
-	qc->flags |= ATA_QCFLAG_RESULT_TF;
-
-	return 0;
-
- invalid_fld:
-	ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
-	/* "Invalid field in cdb" */
-	return 1;
-}
-
-/**
- *	ata_get_xlat_func - check if SCSI to ATA translation is possible
- *	@dev: ATA device
- *	@cmd: SCSI command opcode to consider
- *
- *	Look up the SCSI command given, and determine whether the
- *	SCSI command is to be translated or simulated.
- *
- *	RETURNS:
- *	Pointer to translation function if possible, %NULL if not.
- */
-
-static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
-{
-	switch (cmd) {
-	case READ_6:
-	case READ_10:
-	case READ_16:
-
-	case WRITE_6:
-	case WRITE_10:
-	case WRITE_16:
-		return ata_scsi_rw_xlat;
-
-	case SYNCHRONIZE_CACHE:
-		if (ata_try_flush_cache(dev))
-			return ata_scsi_flush_xlat;
-		break;
-
-	case VERIFY:
-	case VERIFY_16:
-		return ata_scsi_verify_xlat;
-
-	case ATA_12:
-	case ATA_16:
-		return ata_scsi_pass_thru;
-
-	case START_STOP:
-		return ata_scsi_start_stop_xlat;
-	}
-
-	return NULL;
-}
-
-/**
- *	ata_scsi_dump_cdb - dump SCSI command contents to dmesg
- *	@ap: ATA port to which the command was being sent
- *	@cmd: SCSI command to dump
- *
- *	Prints the contents of a SCSI command via printk().
- */
-
-static inline void ata_scsi_dump_cdb(struct ata_port *ap,
-				     struct scsi_cmnd *cmd)
-{
-#ifdef ATA_DEBUG
-	struct scsi_device *scsidev = cmd->device;
-	u8 *scsicmd = cmd->cmnd;
-
-	DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
-		ap->id,
-		scsidev->channel, scsidev->id, scsidev->lun,
-		scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
-		scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
-		scsicmd[8]);
-#endif
-}
-
-static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
-				      void (*done)(struct scsi_cmnd *),
-				      struct ata_device *dev)
-{
-	int rc = 0;
-
-	if (dev->class == ATA_DEV_ATA) {
-		ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
-							      cmd->cmnd[0]);
-
-		if (xlat_func)
-			rc = ata_scsi_translate(dev, cmd, done, xlat_func);
-		else
-			ata_scsi_simulate(dev, cmd, done);
-	} else
-		rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
-
-	return rc;
-}
-
-/**
- *	ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
- *	@cmd: SCSI command to be sent
- *	@done: Completion function, called when command is complete
- *
- *	In some cases, this function translates SCSI commands into
- *	ATA taskfiles, and queues the taskfiles to be sent to
- *	hardware.  In other cases, this function simulates a
- *	SCSI device by evaluating and responding to certain
- *	SCSI commands.  This creates the overall effect of
- *	ATA and ATAPI devices appearing as SCSI devices.
- *
- *	LOCKING:
- *	Releases scsi-layer-held lock, and obtains host_set lock.
- *
- *	RETURNS:
- *	Return value from __ata_scsi_queuecmd() if @cmd can be queued,
- *	0 otherwise.
- */
-int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
-{
-	struct ata_port *ap;
-	struct ata_device *dev;
-	struct scsi_device *scsidev = cmd->device;
-	struct Scsi_Host *shost = scsidev->host;
-	int rc = 0;
-
-	ap = ata_shost_to_port(shost);
-
-	spin_unlock(shost->host_lock);
-	spin_lock(ap->lock);
-
-	ata_scsi_dump_cdb(ap, cmd);
-
-	dev = ata_scsi_find_dev(ap, scsidev);
-	if (likely(dev))
-		rc = __ata_scsi_queuecmd(cmd, done, dev);
-	else {
-		cmd->result = (DID_BAD_TARGET << 16);
-		done(cmd);
-	}
-
-	spin_unlock(ap->lock);
-	spin_lock(shost->host_lock);
-	return rc;
-}
-
-/**
- *	ata_scsi_simulate - simulate SCSI command on ATA device
- *	@dev: the target device
- *	@cmd: SCSI command being sent to device.
- *	@done: SCSI command completion function.
- *
- *	Interprets and directly executes a select list of SCSI commands
- *	that can be handled internally.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- */
-
-void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
-		      void (*done)(struct scsi_cmnd *))
-{
-	struct ata_scsi_args args;
-	const u8 *scsicmd = cmd->cmnd;
-
-	args.dev = dev;
-	args.id = dev->id;
-	args.cmd = cmd;
-	args.done = done;
-
-	switch(scsicmd[0]) {
-		/* no-op's, complete with success */
-		case SYNCHRONIZE_CACHE:
-		case REZERO_UNIT:
-		case SEEK_6:
-		case SEEK_10:
-		case TEST_UNIT_READY:
-		case FORMAT_UNIT:		/* FIXME: correct? */
-		case SEND_DIAGNOSTIC:		/* FIXME: correct? */
-			ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
-			break;
-
-		case INQUIRY:
-			if (scsicmd[1] & 2)	           /* is CmdDt set?  */
-				ata_scsi_invalid_field(cmd, done);
-			else if ((scsicmd[1] & 1) == 0)    /* is EVPD clear? */
-				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
-			else if (scsicmd[2] == 0x00)
-				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
-			else if (scsicmd[2] == 0x80)
-				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
-			else if (scsicmd[2] == 0x83)
-				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
-			else
-				ata_scsi_invalid_field(cmd, done);
-			break;
-
-		case MODE_SENSE:
-		case MODE_SENSE_10:
-			ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
-			break;
-
-		case MODE_SELECT:	/* unconditionally return */
-		case MODE_SELECT_10:	/* bad-field-in-cdb */
-			ata_scsi_invalid_field(cmd, done);
-			break;
-
-		case READ_CAPACITY:
-			ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
-			break;
-
-		case SERVICE_ACTION_IN:
-			if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
-				ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
-			else
-				ata_scsi_invalid_field(cmd, done);
-			break;
-
-		case REPORT_LUNS:
-			ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
-			break;
-
-		/* mandatory commands we haven't implemented yet */
-		case REQUEST_SENSE:
-
-		/* all other commands */
-		default:
-			ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
-			/* "Invalid command operation code" */
-			done(cmd);
-			break;
-	}
-}
-
-void ata_scsi_scan_host(struct ata_port *ap)
-{
-	unsigned int i;
-
-	if (ap->flags & ATA_FLAG_DISABLED)
-		return;
-
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
-		struct scsi_device *sdev;
-
-		if (!ata_dev_enabled(dev) || dev->sdev)
-			continue;
-
-		sdev = __scsi_add_device(ap->host, 0, i, 0, NULL);
-		if (!IS_ERR(sdev)) {
-			dev->sdev = sdev;
-			scsi_device_put(sdev);
-		}
-	}
-}
-
-/**
- *	ata_scsi_offline_dev - offline attached SCSI device
- *	@dev: ATA device to offline attached SCSI device for
- *
- *	This function is called from ata_eh_hotplug() and responsible
- *	for taking the SCSI device attached to @dev offline.  This
- *	function is called with host_set lock which protects dev->sdev
- *	against clearing.
- *
- *	LOCKING:
- *	spin_lock_irqsave(host_set lock)
- *
- *	RETURNS:
- *	1 if attached SCSI device exists, 0 otherwise.
- */
-int ata_scsi_offline_dev(struct ata_device *dev)
-{
-	if (dev->sdev) {
-		scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
-		return 1;
-	}
-	return 0;
-}
-
-/**
- *	ata_scsi_remove_dev - remove attached SCSI device
- *	@dev: ATA device to remove attached SCSI device for
- *
- *	This function is called from ata_eh_scsi_hotplug() and
- *	responsible for removing the SCSI device attached to @dev.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- */
-static void ata_scsi_remove_dev(struct ata_device *dev)
-{
-	struct ata_port *ap = dev->ap;
-	struct scsi_device *sdev;
-	unsigned long flags;
-
-	/* Alas, we need to grab scan_mutex to ensure SCSI device
-	 * state doesn't change underneath us and thus
-	 * scsi_device_get() always succeeds.  The mutex locking can
-	 * be removed if there is __scsi_device_get() interface which
-	 * increments reference counts regardless of device state.
-	 */
-	mutex_lock(&ap->host->scan_mutex);
-	spin_lock_irqsave(ap->lock, flags);
-
-	/* clearing dev->sdev is protected by host_set lock */
-	sdev = dev->sdev;
-	dev->sdev = NULL;
-
-	if (sdev) {
-		/* If user initiated unplug races with us, sdev can go
-		 * away underneath us after the host_set lock and
-		 * scan_mutex are released.  Hold onto it.
-		 */
-		if (scsi_device_get(sdev) == 0) {
-			/* The following ensures the attached sdev is
-			 * offline on return from ata_scsi_offline_dev()
-			 * regardless it wins or loses the race
-			 * against this function.
-			 */
-			scsi_device_set_state(sdev, SDEV_OFFLINE);
-		} else {
-			WARN_ON(1);
-			sdev = NULL;
-		}
-	}
-
-	spin_unlock_irqrestore(ap->lock, flags);
-	mutex_unlock(&ap->host->scan_mutex);
-
-	if (sdev) {
-		ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
-			       sdev->sdev_gendev.bus_id);
-
-		scsi_remove_device(sdev);
-		scsi_device_put(sdev);
-	}
-}
-
-/**
- *	ata_scsi_hotplug - SCSI part of hotplug
- *	@data: Pointer to ATA port to perform SCSI hotplug on
- *
- *	Perform SCSI part of hotplug.  It's executed from a separate
- *	workqueue after EH completes.  This is necessary because SCSI
- *	hot plugging requires working EH and hot unplugging is
- *	synchronized with hot plugging with a mutex.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- */
-void ata_scsi_hotplug(void *data)
-{
-	struct ata_port *ap = data;
-	int i;
-
-	if (ap->pflags & ATA_PFLAG_UNLOADING) {
-		DPRINTK("ENTER/EXIT - unloading\n");
-		return;
-	}
-
-	DPRINTK("ENTER\n");
-
-	/* unplug detached devices */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
-		unsigned long flags;
-
-		if (!(dev->flags & ATA_DFLAG_DETACHED))
-			continue;
-
-		spin_lock_irqsave(ap->lock, flags);
-		dev->flags &= ~ATA_DFLAG_DETACHED;
-		spin_unlock_irqrestore(ap->lock, flags);
-
-		ata_scsi_remove_dev(dev);
-	}
-
-	/* scan for new ones */
-	ata_scsi_scan_host(ap);
-
-	/* If we scanned while EH was in progress, scan would have
-	 * failed silently.  Requeue if there are enabled but
-	 * unattached devices.
-	 */
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		struct ata_device *dev = &ap->device[i];
-		if (ata_dev_enabled(dev) && !dev->sdev) {
-			queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
-			break;
-		}
-	}
-
-	DPRINTK("EXIT\n");
-}
-
-/**
- *	ata_scsi_user_scan - indication for user-initiated bus scan
- *	@shost: SCSI host to scan
- *	@channel: Channel to scan
- *	@id: ID to scan
- *	@lun: LUN to scan
- *
- *	This function is called when user explicitly requests bus
- *	scan.  Set probe pending flag and invoke EH.
- *
- *	LOCKING:
- *	SCSI layer (we don't care)
- *
- *	RETURNS:
- *	Zero.
- */
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
-			      unsigned int id, unsigned int lun)
-{
-	struct ata_port *ap = ata_shost_to_port(shost);
-	unsigned long flags;
-	int rc = 0;
-
-	if (!ap->ops->error_handler)
-		return -EOPNOTSUPP;
-
-	if ((channel != SCAN_WILD_CARD && channel != 0) ||
-	    (lun != SCAN_WILD_CARD && lun != 0))
-		return -EINVAL;
-
-	spin_lock_irqsave(ap->lock, flags);
-
-	if (id == SCAN_WILD_CARD) {
-		ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
-		ap->eh_info.action |= ATA_EH_SOFTRESET;
-	} else {
-		struct ata_device *dev = ata_find_dev(ap, id);
-
-		if (dev) {
-			ap->eh_info.probe_mask |= 1 << dev->devno;
-			ap->eh_info.action |= ATA_EH_SOFTRESET;
-			ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
-		} else
-			rc = -EINVAL;
-	}
-
-	if (rc == 0)
-		ata_port_schedule_eh(ap);
-
-	spin_unlock_irqrestore(ap->lock, flags);
-
-	return rc;
-}
-
-/**
- *	ata_scsi_dev_rescan - initiate scsi_rescan_device()
- *	@data: Pointer to ATA port to perform scsi_rescan_device()
- *
- *	After ATA pass thru (SAT) commands are executed successfully,
- *	libata need to propagate the changes to SCSI layer.  This
- *	function must be executed from ata_aux_wq such that sdev
- *	attach/detach don't race with rescan.
- *
- *	LOCKING:
- *	Kernel thread context (may sleep).
- */
-void ata_scsi_dev_rescan(void *data)
-{
-	struct ata_port *ap = data;
-	struct ata_device *dev;
-	unsigned int i;
-
-	for (i = 0; i < ATA_MAX_DEVICES; i++) {
-		dev = &ap->device[i];
-
-		if (ata_dev_enabled(dev) && dev->sdev)
-			scsi_rescan_device(&(dev->sdev->sdev_gendev));
-	}
-}
-
-/**
- *	ata_sas_port_alloc - Allocate port for a SAS attached SATA device
- *	@pdev: PCI device that the scsi device is attached to
- *	@port_info: Information from low-level host driver
- *	@host: SCSI host that the scsi device is attached to
- *
- *	LOCKING:
- *	PCI/etc. bus probe sem.
- *
- *	RETURNS:
- *	ata_port pointer on success / NULL on failure.
- */
-
-struct ata_port *ata_sas_port_alloc(struct ata_host_set *host_set,
-				    struct ata_port_info *port_info,
-				    struct Scsi_Host *host)
-{
-	struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
-	struct ata_probe_ent *ent;
-
-	if (!ap)
-		return NULL;
-
-	ent = ata_probe_ent_alloc(host_set->dev, port_info);
-	if (!ent) {
-		kfree(ap);
-		return NULL;
-	}
-
-	ata_port_init(ap, host_set, ent, 0);
-	ap->lock = host->host_lock;
-	kfree(ent);
-	return ap;
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
-
-/**
- *	ata_sas_port_start - Set port up for dma.
- *	@ap: Port to initialize
- *
- *	Called just after data structures for each port are
- *	initialized.  Allocates DMA pad.
- *
- *	May be used as the port_start() entry in ata_port_operations.
- *
- *	LOCKING:
- *	Inherited from caller.
- */
-int ata_sas_port_start(struct ata_port *ap)
-{
-	return ata_pad_alloc(ap, ap->dev);
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_start);
-
-/**
- *	ata_port_stop - Undo ata_sas_port_start()
- *	@ap: Port to shut down
- *
- *	Frees the DMA pad.
- *
- *	May be used as the port_stop() entry in ata_port_operations.
- *
- *	LOCKING:
- *	Inherited from caller.
- */
-
-void ata_sas_port_stop(struct ata_port *ap)
-{
-	ata_pad_free(ap, ap->dev);
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_stop);
-
-/**
- *	ata_sas_port_init - Initialize a SATA device
- *	@ap: SATA port to initialize
- *
- *	LOCKING:
- *	PCI/etc. bus probe sem.
- *
- *	RETURNS:
- *	Zero on success, non-zero on error.
- */
-
-int ata_sas_port_init(struct ata_port *ap)
-{
-	int rc = ap->ops->port_start(ap);
-
-	if (!rc)
-		rc = ata_bus_probe(ap);
-
-	return rc;
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_init);
-
-/**
- *	ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
- *	@ap: SATA port to destroy
- *
- */
-
-void ata_sas_port_destroy(struct ata_port *ap)
-{
-	ap->ops->port_stop(ap);
-	kfree(ap);
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
-
-/**
- *	ata_sas_slave_configure - Default slave_config routine for libata devices
- *	@sdev: SCSI device to configure
- *	@ap: ATA port to which SCSI device is attached
- *
- *	RETURNS:
- *	Zero.
- */
-
-int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
-{
-	ata_scsi_sdev_config(sdev);
-	ata_scsi_dev_config(sdev, ap->device);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
-
-/**
- *	ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
- *	@cmd: SCSI command to be sent
- *	@done: Completion function, called when command is complete
- *	@ap:	ATA port to which the command is being sent
- *
- *	RETURNS:
- *	Zero.
- */
-
-int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
-		     struct ata_port *ap)
-{
-	ata_scsi_dump_cdb(ap, cmd);
-
-	if (likely(ata_scsi_dev_enabled(ap->device)))
-		__ata_scsi_queuecmd(cmd, done, ap->device);
-	else {
-		cmd->result = (DID_BAD_TARGET << 16);
-		done(cmd);
-	}
-	return 0;
-}
-EXPORT_SYMBOL_GPL(ata_sas_queuecmd);