/*

   *  Copyright (C) 2000-2002	   Michael Cornwell <cornwell@acm.org>
   *  Copyright (C) 2000-2002	   Andre Hedrick <andre@linux-ide.org>
   *  Copyright (C) 2001-2002	   Klaus Smolin

   *					IBM Storage Technology Division

   *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz

   *
   *  The big the bad and the ugly.

   */

  #include <linux/types.h>
  #include <linux/string.h>
  #include <linux/kernel.h>

  #include <linux/export.h>

  #include <linux/sched.h>

  #include <linux/interrupt.h>

  #include <linux/errno.h>

  #include <linux/slab.h>

  #include <linux/delay.h>
  #include <linux/hdreg.h>
  #include <linux/ide.h>

  #include <linux/scatterlist.h>

  #include <linux/uaccess.h>

  #include <asm/io.h>

  void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
  {
  	ide_hwif_t *hwif = drive->hwif;
  	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  
  	/* Be sure we're looking at the low order bytes */
  	tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  
  	tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
  
  	if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  		tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
  
  		tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
  	}
  }

  void ide_tf_dump(const char *s, struct ide_cmd *cmd)

  {

  #ifdef DEBUG
  	printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  		"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x
  ",

  	       s, cmd->tf.feature, cmd->tf.nsect,
  	       cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  	       cmd->tf.device, cmd->tf.command);
  	printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x
  ",
  	       s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);

  #endif

  }

  int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)

  {

  	struct ide_cmd cmd;

  	memset(&cmd, 0, sizeof(cmd));
  	cmd.tf.nsect = 0x01;

  	if (drive->media == ide_disk)

  		cmd.tf.command = ATA_CMD_ID_ATA;

  	else

  		cmd.tf.command = ATA_CMD_ID_ATAPI;

  	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;

  	cmd.protocol = ATA_PROT_PIO;

  
  	return ide_raw_taskfile(drive, &cmd, buf, 1);

  }

  static ide_startstop_t task_no_data_intr(ide_drive_t *);

  static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);

  static ide_startstop_t task_pio_intr(ide_drive_t *);

  ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)

  {

  	ide_hwif_t *hwif = drive->hwif;

  	struct ide_cmd *cmd = &hwif->cmd;

  	struct ide_taskfile *tf = &cmd->tf;

  	ide_handler_t *handler = NULL;

  	const struct ide_tp_ops *tp_ops = hwif->tp_ops;

  	const struct ide_dma_ops *dma_ops = hwif->dma_ops;

  	if (orig_cmd->protocol == ATA_PROT_PIO &&
  	    (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  	    drive->mult_count == 0) {

  		pr_err("%s: multimode not set!
  ", drive->name);

  		return ide_stopped;

  	}

  	if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  		orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;

  	memcpy(cmd, orig_cmd, sizeof(*cmd));

  	if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {

  		ide_tf_dump(drive->name, cmd);

  		tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);

  
  		if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {

  			u8 data[2] = { cmd->tf.data, cmd->hob.data };

  
  			tp_ops->output_data(drive, cmd, data, 2);
  		}

  
  		if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
  			u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
  				  0xE0 : 0xEF;
  
  			if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
  				cmd->tf.device &= HIHI;
  			cmd->tf.device |= drive->select;
  		}

  		tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
  		tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);

  	}

  	switch (cmd->protocol) {
  	case ATA_PROT_PIO:
  		if (cmd->tf_flags & IDE_TFLAG_WRITE) {
  			tp_ops->exec_command(hwif, tf->command);
  			ndelay(400);	/* FIXME */
  			return pre_task_out_intr(drive, cmd);
  		}

  		handler = task_pio_intr;

  		/* fall-through */

  	case ATA_PROT_NODATA:

  		if (handler == NULL)
  			handler = task_no_data_intr;

  		ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);

  		return ide_started;

  	case ATA_PROT_DMA:

  		if (ide_dma_prepare(drive, cmd))

  			return ide_stopped;

  		hwif->expiry = dma_ops->dma_timer_expiry;

  		ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);

  		dma_ops->dma_start(drive);

  	default:

  		return ide_started;

  	}

  }

  EXPORT_SYMBOL_GPL(do_rw_taskfile);

  static ide_startstop_t task_no_data_intr(ide_drive_t *drive)

  {

  	ide_hwif_t *hwif = drive->hwif;

  	struct ide_cmd *cmd = &hwif->cmd;
  	struct ide_taskfile *tf = &cmd->tf;
  	int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;

  	int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;

  	u8 stat;

  	local_irq_enable_in_hardirq();

  	while (1) {
  		stat = hwif->tp_ops->read_status(hwif);

  		if ((stat & ATA_BUSY) == 0 || retries-- == 0)

  			break;

  		udelay(10);

  	};

  	if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
  		if (custom && tf->command == ATA_CMD_SET_MULTI) {
  			drive->mult_req = drive->mult_count = 0;

  			drive->special_flags |= IDE_SFLAG_RECALIBRATE;

  			(void)ide_dump_status(drive, __func__, stat);
  			return ide_stopped;
  		} else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
  			if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
  				ide_set_handler(drive, &task_no_data_intr,

  						WAIT_WORSTCASE);

  				return ide_started;
  			}
  		}

  		return ide_error(drive, "task_no_data_intr", stat);

  	}

  	if (custom && tf->command == ATA_CMD_SET_MULTI)

  		drive->mult_count = drive->mult_req;

  	if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
  	    tf->command == ATA_CMD_CHK_POWER) {

  		struct request *rq = hwif->rq;

  
  		if (blk_pm_request(rq))
  			ide_complete_pm_rq(drive, rq);

  		else
  			ide_finish_cmd(drive, cmd, stat);

  	}

  	return ide_stopped;
  }

  static u8 wait_drive_not_busy(ide_drive_t *drive)

  {

  	ide_hwif_t *hwif = drive->hwif;

  	int retries;

  	u8 stat;
  
  	/*

  	 * Last sector was transferred, wait until device is ready.  This can

  	 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.

  	 */

  	for (retries = 0; retries < 1000; retries++) {

  		stat = hwif->tp_ops->read_status(hwif);

  		if (stat & ATA_BUSY)

  			udelay(10);
  		else
  			break;
  	}

  	if (stat & ATA_BUSY)

  		pr_err("%s: drive still BUSY!
  ", drive->name);

  
  	return stat;
  }

  void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
  		   unsigned int write, unsigned int len)

  {
  	ide_hwif_t *hwif = drive->hwif;
  	struct scatterlist *sg = hwif->sg_table;

  	struct scatterlist *cursg = cmd->cursg;

  	unsigned long uninitialized_var(flags);

  	struct page *page;

  	unsigned int offset;
  	u8 *buf;

  	cursg = cmd->cursg;

  	if (cursg == NULL)
  		cursg = cmd->cursg = sg;
  
  	while (len) {
  		unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);

  		int page_is_high;

  		if (nr_bytes > PAGE_SIZE)
  			nr_bytes = PAGE_SIZE;

  		page = sg_page(cursg);
  		offset = cursg->offset + cmd->cursg_ofs;
  
  		/* get the current page and offset */
  		page = nth_page(page, (offset >> PAGE_SHIFT));
  		offset %= PAGE_SIZE;

  		page_is_high = PageHighMem(page);
  		if (page_is_high)

  			local_irq_save(flags);

  		buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;

  		cmd->nleft -= nr_bytes;
  		cmd->cursg_ofs += nr_bytes;

  		if (cmd->cursg_ofs == cursg->length) {
  			cursg = cmd->cursg = sg_next(cmd->cursg);
  			cmd->cursg_ofs = 0;
  		}

  		/* do the actual data transfer */
  		if (write)
  			hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
  		else
  			hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);

  		kunmap_atomic(buf, KM_BIO_SRC_IRQ);

  		if (page_is_high)

  			local_irq_restore(flags);

  		len -= nr_bytes;
  	}

  }

  EXPORT_SYMBOL_GPL(ide_pio_bytes);

  static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
  			      unsigned int write)

  {

  	unsigned int nr_bytes;

  	u8 saved_io_32bit = drive->io_32bit;

  	if (cmd->tf_flags & IDE_TFLAG_FS)
  		cmd->rq->errors = 0;

  	if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)

  		drive->io_32bit = 0;

  	touch_softlockup_watchdog();

  	if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)

  		nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);

  	else

  		nr_bytes = SECTOR_SIZE;
  
  	ide_pio_bytes(drive, cmd, write, nr_bytes);

  
  	drive->io_32bit = saved_io_32bit;

  }

  static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)

  {

  	if (cmd->tf_flags & IDE_TFLAG_FS) {

  		int nr_bytes = cmd->nbytes - cmd->nleft;

  		if (cmd->protocol == ATA_PROT_PIO &&
  		    ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
  			if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)

  				nr_bytes -= drive->mult_count << 9;

  			else

  				nr_bytes -= SECTOR_SIZE;

  		}

  		if (nr_bytes > 0)
  			ide_complete_rq(drive, 0, nr_bytes);

  	}

  }

  void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)

  {

  	struct request *rq = drive->hwif->rq;

  	u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
  	u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);

  	ide_complete_cmd(drive, cmd, stat, err);

  	rq->errors = err;

  
  	if (err == 0 && set_xfer) {
  		ide_set_xfer_rate(drive, nsect);
  		ide_driveid_update(drive);
  	}

  	ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));

  }
  
  /*

   * Handler for command with PIO data phase.

   */

  static ide_startstop_t task_pio_intr(ide_drive_t *drive)

  {
  	ide_hwif_t *hwif = drive->hwif;

  	struct ide_cmd *cmd = &drive->hwif->cmd;

  	u8 stat = hwif->tp_ops->read_status(hwif);

  	u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);

  	if (write == 0) {
  		/* Error? */
  		if (stat & ATA_ERR)

  			goto out_err;

  		/* Didn't want any data? Odd. */

  		if ((stat & ATA_DRQ) == 0) {
  			/* Command all done? */

  			if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
  				goto out_end;

  
  			/* Assume it was a spurious irq */

  			goto out_wait;

  		}

  	} else {
  		if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))

  			goto out_err;

  		/* Deal with unexpected ATA data phase. */
  		if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))

  			goto out_err;

  	}

  	if (write && cmd->nleft == 0)
  		goto out_end;

  
  	/* Still data left to transfer. */

  	ide_pio_datablock(drive, cmd, write);

  	/* Are we done? Check status and finish transfer. */
  	if (write == 0 && cmd->nleft == 0) {
  		stat = wait_drive_not_busy(drive);
  		if (!OK_STAT(stat, 0, BAD_STAT))

  			goto out_err;

  		goto out_end;
  	}
  out_wait:

  	/* Still data left to transfer. */

  	ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);

  	return ide_started;

  out_end:

  	if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
  		ide_finish_cmd(drive, cmd, stat);
  	else

  		ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);

  	return ide_stopped;
  out_err:

  	ide_error_cmd(drive, cmd);
  	return ide_error(drive, __func__, stat);

  }

  static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
  					 struct ide_cmd *cmd)

  {
  	ide_startstop_t startstop;

  	if (ide_wait_stat(&startstop, drive, ATA_DRQ,

  			  drive->bad_wstat, WAIT_DRQ)) {

  		pr_err("%s: no DRQ after issuing %sWRITE%s
  ", drive->name,

  			(cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",

  			(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");

  		return startstop;
  	}

  	if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)

  		local_irq_disable();

  	ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);

  	ide_pio_datablock(drive, cmd, 1);

  
  	return ide_started;
  }

  int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
  		     u16 nsect)

  {

  	struct request *rq;
  	int error;

  	int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;

  	rq = blk_get_request(drive->queue, rw, __GFP_WAIT);

  	rq->cmd_type = REQ_TYPE_ATA_TASKFILE;

  	/*
  	 * (ks) We transfer currently only whole sectors.
  	 * This is suffient for now.  But, it would be great,
  	 * if we would find a solution to transfer any size.
  	 * To support special commands like READ LONG.
  	 */

  	if (nsect) {
  		error = blk_rq_map_kern(drive->queue, rq, buf,
  					nsect * SECTOR_SIZE, __GFP_WAIT);
  		if (error)
  			goto put_req;
  	}

  	rq->special = cmd;
  	cmd->rq = rq;

  	error = blk_execute_rq(drive->queue, NULL, rq, 0);

  put_req:
  	blk_put_request(rq);

  	return error;

  }

  EXPORT_SYMBOL(ide_raw_taskfile);

  int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)

  {

  	cmd->protocol = ATA_PROT_NODATA;

  	return ide_raw_taskfile(drive, cmd, NULL, 0);

  }
  EXPORT_SYMBOL_GPL(ide_no_data_taskfile);

  #ifdef CONFIG_IDE_TASK_IOCTL

  int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)

  {
  	ide_task_request_t	*req_task;

  	struct ide_cmd		cmd;

  	u8 *outbuf		= NULL;
  	u8 *inbuf		= NULL;

  	u8 *data_buf		= NULL;

  	int err			= 0;
  	int tasksize		= sizeof(struct ide_task_request_s);

  	unsigned int taskin	= 0;
  	unsigned int taskout	= 0;

  	u16 nsect		= 0;

  	char __user *buf = (char __user *)arg;

  	req_task = memdup_user(buf, tasksize);
  	if (IS_ERR(req_task))
  		return PTR_ERR(req_task);

  	taskout = req_task->out_size;
  	taskin  = req_task->in_size;

  	if (taskin > 65536 || taskout > 65536) {
  		err = -EINVAL;
  		goto abort;
  	}

  
  	if (taskout) {
  		int outtotal = tasksize;

  		outbuf = kzalloc(taskout, GFP_KERNEL);

  		if (outbuf == NULL) {
  			err = -ENOMEM;
  			goto abort;
  		}

  		if (copy_from_user(outbuf, buf + outtotal, taskout)) {
  			err = -EFAULT;
  			goto abort;
  		}
  	}
  
  	if (taskin) {
  		int intotal = tasksize + taskout;

  		inbuf = kzalloc(taskin, GFP_KERNEL);

  		if (inbuf == NULL) {
  			err = -ENOMEM;
  			goto abort;
  		}

  		if (copy_from_user(inbuf, buf + intotal, taskin)) {
  			err = -EFAULT;
  			goto abort;
  		}
  	}

  	memset(&cmd, 0, sizeof(cmd));

  	memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
  	memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);

  	cmd.valid.out.tf = IDE_VALID_DEVICE;
  	cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
  	cmd.tf_flags = IDE_TFLAG_IO_16BIT;

  	if (drive->dev_flags & IDE_DFLAG_LBA48) {
  		cmd.tf_flags |= IDE_TFLAG_LBA48;
  		cmd.valid.in.hob = IDE_VALID_IN_HOB;
  	}

  	if (req_task->out_flags.all) {

  		cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;

  
  		if (req_task->out_flags.b.data)

  			cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;

  
  		if (req_task->out_flags.b.nsector_hob)

  			cmd.valid.out.hob |= IDE_VALID_NSECT;

  		if (req_task->out_flags.b.sector_hob)

  			cmd.valid.out.hob |= IDE_VALID_LBAL;

  		if (req_task->out_flags.b.lcyl_hob)

  			cmd.valid.out.hob |= IDE_VALID_LBAM;

  		if (req_task->out_flags.b.hcyl_hob)

  			cmd.valid.out.hob |= IDE_VALID_LBAH;

  
  		if (req_task->out_flags.b.error_feature)

  			cmd.valid.out.tf  |= IDE_VALID_FEATURE;

  		if (req_task->out_flags.b.nsector)

  			cmd.valid.out.tf  |= IDE_VALID_NSECT;

  		if (req_task->out_flags.b.sector)

  			cmd.valid.out.tf  |= IDE_VALID_LBAL;

  		if (req_task->out_flags.b.lcyl)

  			cmd.valid.out.tf  |= IDE_VALID_LBAM;

  		if (req_task->out_flags.b.hcyl)

  			cmd.valid.out.tf  |= IDE_VALID_LBAH;

  	} else {

  		cmd.valid.out.tf |= IDE_VALID_OUT_TF;

  		if (cmd.tf_flags & IDE_TFLAG_LBA48)

  			cmd.valid.out.hob |= IDE_VALID_OUT_HOB;

  	}

  	if (req_task->in_flags.b.data)

  		cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;

  	if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
  		/* fixup data phase if needed */
  		if (req_task->data_phase == TASKFILE_IN_DMAQ ||
  		    req_task->data_phase == TASKFILE_IN_DMA)

  			cmd.tf_flags |= IDE_TFLAG_WRITE;

  	}

  	cmd.protocol = ATA_PROT_DMA;
  
  	switch (req_task->data_phase) {

  	case TASKFILE_MULTI_OUT:
  		if (!drive->mult_count) {
  			/* (hs): give up if multcount is not set */
  			pr_err("%s: %s Multimode Write multcount is not set
  ",
  				drive->name, __func__);
  			err = -EPERM;
  			goto abort;
  		}
  		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
  		/* fall through */
  	case TASKFILE_OUT:
  		cmd.protocol = ATA_PROT_PIO;
  		/* fall through */
  	case TASKFILE_OUT_DMAQ:
  	case TASKFILE_OUT_DMA:
  		cmd.tf_flags |= IDE_TFLAG_WRITE;
  		nsect = taskout / SECTOR_SIZE;
  		data_buf = outbuf;
  		break;
  	case TASKFILE_MULTI_IN:
  		if (!drive->mult_count) {
  			/* (hs): give up if multcount is not set */
  			pr_err("%s: %s Multimode Read multcount is not set
  ",
  				drive->name, __func__);
  			err = -EPERM;

  			goto abort;

  		}
  		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
  		/* fall through */
  	case TASKFILE_IN:
  		cmd.protocol = ATA_PROT_PIO;
  		/* fall through */
  	case TASKFILE_IN_DMAQ:
  	case TASKFILE_IN_DMA:
  		nsect = taskin / SECTOR_SIZE;
  		data_buf = inbuf;
  		break;
  	case TASKFILE_NO_DATA:
  		cmd.protocol = ATA_PROT_NODATA;
  		break;
  	default:
  		err = -EFAULT;
  		goto abort;

  	}

  	if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
  		nsect = 0;
  	else if (!nsect) {

  		nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;

  
  		if (!nsect) {

  			pr_err("%s: in/out command without data
  ",

  					drive->name);
  			err = -EFAULT;
  			goto abort;
  		}
  	}

  	err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);

  	memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
  	memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);

  	if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&

  	    req_task->in_flags.all == 0) {
  		req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;

  		if (drive->dev_flags & IDE_DFLAG_LBA48)

  			req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
  	}

  
  	if (copy_to_user(buf, req_task, tasksize)) {
  		err = -EFAULT;
  		goto abort;
  	}
  	if (taskout) {
  		int outtotal = tasksize;
  		if (copy_to_user(buf + outtotal, outbuf, taskout)) {
  			err = -EFAULT;
  			goto abort;
  		}
  	}
  	if (taskin) {
  		int intotal = tasksize + taskout;
  		if (copy_to_user(buf + intotal, inbuf, taskin)) {
  			err = -EFAULT;
  			goto abort;
  		}
  	}
  abort:
  	kfree(req_task);

  	kfree(outbuf);
  	kfree(inbuf);

  	return err;
  }

  #endif