Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 884 insertions, 0 deletions

diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
new file mode 100644
index 000000000000..d04f62ab5de1
--- /dev/null
+++ b/drivers/ide/ide-taskfile.c
@@ -0,0 +1,884 @@
+/*
+ * linux/drivers/ide/ide-taskfile.c	Version 0.38	March 05, 2003
+ *
+ *  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	Bartlomiej Zolnierkiewicz
+ *
+ *  The big the bad and the ugly.
+ *
+ *  Problems to be fixed because of BH interface or the lack therefore.
+ *
+ *  Fill me in stupid !!!
+ *
+ *  HOST:
+ *	General refers to the Controller and Driver "pair".
+ *  DATA HANDLER:
+ *	Under the context of Linux it generally refers to an interrupt handler.
+ *	However, it correctly describes the 'HOST'
+ *  DATA BLOCK:
+ *	The amount of data needed to be transfered as predefined in the
+ *	setup of the device.
+ *  STORAGE ATOMIC:
+ *	The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as
+ *	small as a single sector or as large as the entire command block
+ *	request.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/bitops.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define DEBUG_TASKFILE	0	/* unset when fixed */
+
+static void ata_bswap_data (void *buffer, int wcount)
+{
+	u16 *p = buffer;
+
+	while (wcount--) {
+		*p = *p << 8 | *p >> 8; p++;
+		*p = *p << 8 | *p >> 8; p++;
+	}
+}
+
+static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
+{
+	HWIF(drive)->ata_input_data(drive, buffer, wcount);
+	if (drive->bswap)
+		ata_bswap_data(buffer, wcount);
+}
+
+static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
+{
+	if (drive->bswap) {
+		ata_bswap_data(buffer, wcount);
+		HWIF(drive)->ata_output_data(drive, buffer, wcount);
+		ata_bswap_data(buffer, wcount);
+	} else {
+		HWIF(drive)->ata_output_data(drive, buffer, wcount);
+	}
+}
+
+int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
+{
+	ide_task_t args;
+	memset(&args, 0, sizeof(ide_task_t));
+	args.tfRegister[IDE_NSECTOR_OFFSET]	= 0x01;
+	if (drive->media == ide_disk)
+		args.tfRegister[IDE_COMMAND_OFFSET]	= WIN_IDENTIFY;
+	else
+		args.tfRegister[IDE_COMMAND_OFFSET]	= WIN_PIDENTIFY;
+	args.command_type = IDE_DRIVE_TASK_IN;
+	args.data_phase   = TASKFILE_IN;
+	args.handler	  = &task_in_intr;
+	return ide_raw_taskfile(drive, &args, buf);
+}
+
+ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	task_struct_t *taskfile	= (task_struct_t *) task->tfRegister;
+	hob_struct_t *hobfile	= (hob_struct_t *) task->hobRegister;
+	u8 HIHI			= (drive->addressing == 1) ? 0xE0 : 0xEF;
+
+	/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
+	if (IDE_CONTROL_REG) {
+		/* clear nIEN */
+		hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
+	}
+	SELECT_MASK(drive, 0);
+
+	if (drive->addressing == 1) {
+		hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
+		hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
+		hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
+		hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
+		hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
+	}
+
+	hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
+	hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
+	hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
+	hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
+	hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
+
+	hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
+
+	if (task->handler != NULL) {
+		if (task->prehandler != NULL) {
+			hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
+			ndelay(400);	/* FIXME */
+			return task->prehandler(drive, task->rq);
+		}
+		ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
+		return ide_started;
+	}
+
+	if (!drive->using_dma)
+		return ide_stopped;
+
+	switch (taskfile->command) {
+		case WIN_WRITEDMA_ONCE:
+		case WIN_WRITEDMA:
+		case WIN_WRITEDMA_EXT:
+		case WIN_READDMA_ONCE:
+		case WIN_READDMA:
+		case WIN_READDMA_EXT:
+		case WIN_IDENTIFY_DMA:
+			if (!hwif->dma_setup(drive)) {
+				hwif->dma_exec_cmd(drive, taskfile->command);
+				hwif->dma_start(drive);
+				return ide_started;
+			}
+			break;
+		default:
+			if (task->handler == NULL)
+				return ide_stopped;
+	}
+
+	return ide_stopped;
+}
+
+EXPORT_SYMBOL(do_rw_taskfile);
+
+/*
+ * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
+ */
+ide_startstop_t set_multmode_intr (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	u8 stat;
+
+	if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
+		drive->mult_count = drive->mult_req;
+	} else {
+		drive->mult_req = drive->mult_count = 0;
+		drive->special.b.recalibrate = 1;
+		(void) ide_dump_status(drive, "set_multmode", stat);
+	}
+	return ide_stopped;
+}
+
+/*
+ * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
+ */
+ide_startstop_t set_geometry_intr (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	int retries = 5;
+	u8 stat;
+
+	while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
+		udelay(10);
+
+	if (OK_STAT(stat, READY_STAT, BAD_STAT))
+		return ide_stopped;
+
+	if (stat & (ERR_STAT|DRQ_STAT))
+		return ide_error(drive, "set_geometry_intr", stat);
+
+	if (HWGROUP(drive)->handler != NULL)
+		BUG();
+	ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
+	return ide_started;
+}
+
+/*
+ * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
+ */
+ide_startstop_t recal_intr (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	u8 stat;
+
+	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
+		return ide_error(drive, "recal_intr", stat);
+	return ide_stopped;
+}
+
+/*
+ * Handler for commands without a data phase
+ */
+ide_startstop_t task_no_data_intr (ide_drive_t *drive)
+{
+	ide_task_t *args	= HWGROUP(drive)->rq->special;
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 stat;
+
+	local_irq_enable();
+	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
+		return ide_error(drive, "task_no_data_intr", stat);
+		/* calls ide_end_drive_cmd */
+	}
+	if (args)
+		ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
+
+	return ide_stopped;
+}
+
+EXPORT_SYMBOL(task_no_data_intr);
+
+static u8 wait_drive_not_busy(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	int retries = 100;
+	u8 stat;
+
+	/*
+	 * Last sector was transfered, wait until drive is ready.
+	 * This can take up to 10 usec, but we will wait max 1 ms
+	 * (drive_cmd_intr() waits that long).
+	 */
+	while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
+		udelay(10);
+
+	if (!retries)
+		printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
+
+	return stat;
+}
+
+static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct scatterlist *sg = hwif->sg_table;
+	struct page *page;
+#ifdef CONFIG_HIGHMEM
+	unsigned long flags;
+#endif
+	unsigned int offset;
+	u8 *buf;
+
+	page = sg[hwif->cursg].page;
+	offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
+
+	/* get the current page and offset */
+	page = nth_page(page, (offset >> PAGE_SHIFT));
+	offset %= PAGE_SIZE;
+
+#ifdef CONFIG_HIGHMEM
+	local_irq_save(flags);
+#endif
+	buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
+
+	hwif->nleft--;
+	hwif->cursg_ofs++;
+
+	if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
+		hwif->cursg++;
+		hwif->cursg_ofs = 0;
+	}
+
+	/* do the actual data transfer */
+	if (write)
+		taskfile_output_data(drive, buf, SECTOR_WORDS);
+	else
+		taskfile_input_data(drive, buf, SECTOR_WORDS);
+
+	kunmap_atomic(buf, KM_BIO_SRC_IRQ);
+#ifdef CONFIG_HIGHMEM
+	local_irq_restore(flags);
+#endif
+}
+
+static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
+{
+	unsigned int nsect;
+
+	nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
+	while (nsect--)
+		ide_pio_sector(drive, write);
+}
+
+static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
+				     unsigned int write)
+{
+	if (rq->bio)	/* fs request */
+		rq->errors = 0;
+
+	switch (drive->hwif->data_phase) {
+	case TASKFILE_MULTI_IN:
+	case TASKFILE_MULTI_OUT:
+		ide_pio_multi(drive, write);
+		break;
+	default:
+		ide_pio_sector(drive, write);
+		break;
+	}
+}
+
+static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
+				  const char *s, u8 stat)
+{
+	if (rq->bio) {
+		ide_hwif_t *hwif = drive->hwif;
+		int sectors = hwif->nsect - hwif->nleft;
+
+		switch (hwif->data_phase) {
+		case TASKFILE_IN:
+			if (hwif->nleft)
+				break;
+			/* fall through */
+		case TASKFILE_OUT:
+			sectors--;
+			break;
+		case TASKFILE_MULTI_IN:
+			if (hwif->nleft)
+				break;
+			/* fall through */
+		case TASKFILE_MULTI_OUT:
+			sectors -= drive->mult_count;
+		default:
+			break;
+		}
+
+		if (sectors > 0) {
+			ide_driver_t *drv;
+
+			drv = *(ide_driver_t **)rq->rq_disk->private_data;
+			drv->end_request(drive, 1, sectors);
+		}
+	}
+	return ide_error(drive, s, stat);
+}
+
+static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
+{
+	if (rq->flags & REQ_DRIVE_TASKFILE) {
+		ide_task_t *task = rq->special;
+
+		if (task->tf_out_flags.all) {
+			u8 err = drive->hwif->INB(IDE_ERROR_REG);
+			ide_end_drive_cmd(drive, stat, err);
+			return;
+		}
+	}
+
+	ide_end_request(drive, 1, rq->hard_nr_sectors);
+}
+
+/*
+ * Handler for command with PIO data-in phase (Read/Read Multiple).
+ */
+ide_startstop_t task_in_intr (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq = HWGROUP(drive)->rq;
+	u8 stat = hwif->INB(IDE_STATUS_REG);
+
+	/* new way for dealing with premature shared PCI interrupts */
+	if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
+		if (stat & (ERR_STAT | DRQ_STAT))
+			return task_error(drive, rq, __FUNCTION__, stat);
+		/* No data yet, so wait for another IRQ. */
+		ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
+		return ide_started;
+	}
+
+	ide_pio_datablock(drive, rq, 0);
+
+	/* If it was the last datablock check status and finish transfer. */
+	if (!hwif->nleft) {
+		stat = wait_drive_not_busy(drive);
+		if (!OK_STAT(stat, 0, BAD_R_STAT))
+			return task_error(drive, rq, __FUNCTION__, stat);
+		task_end_request(drive, rq, stat);
+		return ide_stopped;
+	}
+
+	/* Still data left to transfer. */
+	ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
+
+	return ide_started;
+}
+EXPORT_SYMBOL(task_in_intr);
+
+/*
+ * Handler for command with PIO data-out phase (Write/Write Multiple).
+ */
+static ide_startstop_t task_out_intr (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq = HWGROUP(drive)->rq;
+	u8 stat = hwif->INB(IDE_STATUS_REG);
+
+	if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
+		return task_error(drive, rq, __FUNCTION__, stat);
+
+	/* Deal with unexpected ATA data phase. */
+	if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
+		return task_error(drive, rq, __FUNCTION__, stat);
+
+	if (!hwif->nleft) {
+		task_end_request(drive, rq, stat);
+		return ide_stopped;
+	}
+
+	/* Still data left to transfer. */
+	ide_pio_datablock(drive, rq, 1);
+	ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
+
+	return ide_started;
+}
+
+ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
+{
+	ide_startstop_t startstop;
+
+	if (ide_wait_stat(&startstop, drive, DATA_READY,
+			  drive->bad_wstat, WAIT_DRQ)) {
+		printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
+				drive->name,
+				drive->hwif->data_phase ? "MULT" : "",
+				drive->addressing ? "_EXT" : "");
+		return startstop;
+	}
+
+	if (!drive->unmask)
+		local_irq_disable();
+
+	ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
+	ide_pio_datablock(drive, rq, 1);
+
+	return ide_started;
+}
+EXPORT_SYMBOL(pre_task_out_intr);
+
+static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
+{
+	struct request rq;
+
+	memset(&rq, 0, sizeof(rq));
+	rq.flags = REQ_DRIVE_TASKFILE;
+	rq.buffer = buf;
+
+	/*
+	 * (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 (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
+		if (data_size == 0)
+			rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
+		else
+			rq.nr_sectors = data_size / SECTOR_SIZE;
+
+		if (!rq.nr_sectors) {
+			printk(KERN_ERR "%s: in/out command without data\n",
+					drive->name);
+			return -EFAULT;
+		}
+
+		rq.hard_nr_sectors = rq.nr_sectors;
+		rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
+
+		if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
+			rq.flags |= REQ_RW;
+	}
+
+	rq.special = args;
+	return ide_do_drive_cmd(drive, &rq, ide_wait);
+}
+
+int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
+{
+	return ide_diag_taskfile(drive, args, 0, buf);
+}
+
+EXPORT_SYMBOL(ide_raw_taskfile);
+
+int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
+{
+	ide_task_request_t	*req_task;
+	ide_task_t		args;
+	u8 *outbuf		= NULL;
+	u8 *inbuf		= NULL;
+	task_ioreg_t *argsptr	= args.tfRegister;
+	task_ioreg_t *hobsptr	= args.hobRegister;
+	int err			= 0;
+	int tasksize		= sizeof(struct ide_task_request_s);
+	int taskin		= 0;
+	int taskout		= 0;
+	u8 io_32bit		= drive->io_32bit;
+	char __user *buf = (char __user *)arg;
+
+//	printk("IDE Taskfile ...\n");
+
+	req_task = kmalloc(tasksize, GFP_KERNEL);
+	if (req_task == NULL) return -ENOMEM;
+	memset(req_task, 0, tasksize);
+	if (copy_from_user(req_task, buf, tasksize)) {
+		kfree(req_task);
+		return -EFAULT;
+	}
+
+	taskout = (int) req_task->out_size;
+	taskin  = (int) req_task->in_size;
+
+	if (taskout) {
+		int outtotal = tasksize;
+		outbuf = kmalloc(taskout, GFP_KERNEL);
+		if (outbuf == NULL) {
+			err = -ENOMEM;
+			goto abort;
+		}
+		memset(outbuf, 0, taskout);
+		if (copy_from_user(outbuf, buf + outtotal, taskout)) {
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+
+	if (taskin) {
+		int intotal = tasksize + taskout;
+		inbuf = kmalloc(taskin, GFP_KERNEL);
+		if (inbuf == NULL) {
+			err = -ENOMEM;
+			goto abort;
+		}
+		memset(inbuf, 0, taskin);
+		if (copy_from_user(inbuf, buf + intotal, taskin)) {
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+
+	memset(&args, 0, sizeof(ide_task_t));
+	memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
+	memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
+
+	args.tf_in_flags  = req_task->in_flags;
+	args.tf_out_flags = req_task->out_flags;
+	args.data_phase   = req_task->data_phase;
+	args.command_type = req_task->req_cmd;
+
+	drive->io_32bit = 0;
+	switch(req_task->data_phase) {
+		case TASKFILE_OUT_DMAQ:
+		case TASKFILE_OUT_DMA:
+			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
+			break;
+		case TASKFILE_IN_DMAQ:
+		case TASKFILE_IN_DMA:
+			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
+			break;
+		case TASKFILE_MULTI_OUT:
+			if (!drive->mult_count) {
+				/* (hs): give up if multcount is not set */
+				printk(KERN_ERR "%s: %s Multimode Write " \
+					"multcount is not set\n",
+					drive->name, __FUNCTION__);
+				err = -EPERM;
+				goto abort;
+			}
+			/* fall through */
+		case TASKFILE_OUT:
+			args.prehandler = &pre_task_out_intr;
+			args.handler = &task_out_intr;
+			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
+			break;
+		case TASKFILE_MULTI_IN:
+			if (!drive->mult_count) {
+				/* (hs): give up if multcount is not set */
+				printk(KERN_ERR "%s: %s Multimode Read failure " \
+					"multcount is not set\n",
+					drive->name, __FUNCTION__);
+				err = -EPERM;
+				goto abort;
+			}
+			/* fall through */
+		case TASKFILE_IN:
+			args.handler = &task_in_intr;
+			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
+			break;
+		case TASKFILE_NO_DATA:
+			args.handler = &task_no_data_intr;
+			err = ide_diag_taskfile(drive, &args, 0, NULL);
+			break;
+		default:
+			err = -EFAULT;
+			goto abort;
+	}
+
+	memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
+	memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
+	req_task->in_flags  = args.tf_in_flags;
+	req_task->out_flags = args.tf_out_flags;
+
+	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);
+	if (outbuf != NULL)
+		kfree(outbuf);
+	if (inbuf != NULL)
+		kfree(inbuf);
+
+//	printk("IDE Taskfile ioctl ended. rc = %i\n", err);
+
+	drive->io_32bit = io_32bit;
+
+	return err;
+}
+
+int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
+{
+	struct request rq;
+	u8 buffer[4];
+
+	if (!buf)
+		buf = buffer;
+	memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
+	ide_init_drive_cmd(&rq);
+	rq.buffer = buf;
+	*buf++ = cmd;
+	*buf++ = nsect;
+	*buf++ = feature;
+	*buf++ = sectors;
+	return ide_do_drive_cmd(drive, &rq, ide_wait);
+}
+
+/*
+ * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
+ */
+int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
+{
+	int err = 0;
+	u8 args[4], *argbuf = args;
+	u8 xfer_rate = 0;
+	int argsize = 4;
+	ide_task_t tfargs;
+
+	if (NULL == (void *) arg) {
+		struct request rq;
+		ide_init_drive_cmd(&rq);
+		return ide_do_drive_cmd(drive, &rq, ide_wait);
+	}
+
+	if (copy_from_user(args, (void __user *)arg, 4))
+		return -EFAULT;
+
+	memset(&tfargs, 0, sizeof(ide_task_t));
+	tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
+	tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
+	tfargs.tfRegister[IDE_SECTOR_OFFSET]  = args[1];
+	tfargs.tfRegister[IDE_LCYL_OFFSET]    = 0x00;
+	tfargs.tfRegister[IDE_HCYL_OFFSET]    = 0x00;
+	tfargs.tfRegister[IDE_SELECT_OFFSET]  = 0x00;
+	tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
+
+	if (args[3]) {
+		argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
+		argbuf = kmalloc(argsize, GFP_KERNEL);
+		if (argbuf == NULL)
+			return -ENOMEM;
+		memcpy(argbuf, args, 4);
+	}
+	if (set_transfer(drive, &tfargs)) {
+		xfer_rate = args[1];
+		if (ide_ata66_check(drive, &tfargs))
+			goto abort;
+	}
+
+	err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
+
+	if (!err && xfer_rate) {
+		/* active-retuning-calls future */
+		ide_set_xfer_rate(drive, xfer_rate);
+		ide_driveid_update(drive);
+	}
+abort:
+	if (copy_to_user((void __user *)arg, argbuf, argsize))
+		err = -EFAULT;
+	if (argsize > 4)
+		kfree(argbuf);
+	return err;
+}
+
+static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
+{
+	struct request rq;
+
+	ide_init_drive_cmd(&rq);
+	rq.flags = REQ_DRIVE_TASK;
+	rq.buffer = buf;
+	return ide_do_drive_cmd(drive, &rq, ide_wait);
+}
+
+/*
+ * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
+ */
+int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
+{
+	void __user *p = (void __user *)arg;
+	int err = 0;
+	u8 args[7], *argbuf = args;
+	int argsize = 7;
+
+	if (copy_from_user(args, p, 7))
+		return -EFAULT;
+	err = ide_wait_cmd_task(drive, argbuf);
+	if (copy_to_user(p, argbuf, argsize))
+		err = -EFAULT;
+	return err;
+}
+
+/*
+ * NOTICE: This is additions from IBM to provide a discrete interface,
+ * for selective taskregister access operations.  Nice JOB Klaus!!!
+ * Glad to be able to work and co-develop this with you and IBM.
+ */
+ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	task_struct_t *taskfile	= (task_struct_t *) task->tfRegister;
+	hob_struct_t *hobfile	= (hob_struct_t *) task->hobRegister;
+#if DEBUG_TASKFILE
+	u8 status;
+#endif
+
+	if (task->data_phase == TASKFILE_MULTI_IN ||
+	    task->data_phase == TASKFILE_MULTI_OUT) {
+		if (!drive->mult_count) {
+			printk(KERN_ERR "%s: multimode not set!\n", drive->name);
+			return ide_stopped;
+		}
+	}
+
+	/*
+	 * (ks) Check taskfile in/out flags.
+	 * If set, then execute as it is defined.
+	 * If not set, then define default settings.
+	 * The default values are:
+	 *	write and read all taskfile registers (except data) 
+	 *	write and read the hob registers (sector,nsector,lcyl,hcyl)
+	 */
+	if (task->tf_out_flags.all == 0) {
+		task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS;
+		if (drive->addressing == 1)
+			task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8);
+        }
+
+	if (task->tf_in_flags.all == 0) {
+		task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
+		if (drive->addressing == 1)
+			task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS  << 8);
+        }
+
+	/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
+	if (IDE_CONTROL_REG)
+		/* clear nIEN */
+		hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
+	SELECT_MASK(drive, 0);
+
+#if DEBUG_TASKFILE
+	status = hwif->INB(IDE_STATUS_REG);
+	if (status & 0x80) {
+		printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status);
+		udelay(100);
+		status = hwif->INB(IDE_STATUS_REG);
+		printk("flagged_taskfile -> Status = %02x\n", status);
+	}
+#endif
+
+	if (task->tf_out_flags.b.data) {
+		u16 data =  taskfile->data + (hobfile->data << 8);
+		hwif->OUTW(data, IDE_DATA_REG);
+	}
+
+	/* (ks) send hob registers first */
+	if (task->tf_out_flags.b.nsector_hob)
+		hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
+	if (task->tf_out_flags.b.sector_hob)
+		hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
+	if (task->tf_out_flags.b.lcyl_hob)
+		hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
+	if (task->tf_out_flags.b.hcyl_hob)
+		hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
+
+	/* (ks) Send now the standard registers */
+	if (task->tf_out_flags.b.error_feature)
+		hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
+	/* refers to number of sectors to transfer */
+	if (task->tf_out_flags.b.nsector)
+		hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
+	/* refers to sector offset or start sector */
+	if (task->tf_out_flags.b.sector)
+		hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
+	if (task->tf_out_flags.b.lcyl)
+		hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
+	if (task->tf_out_flags.b.hcyl)
+		hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
+
+        /*
+	 * (ks) In the flagged taskfile approch, we will use all specified
+	 * registers and the register value will not be changed, except the
+	 * select bit (master/slave) in the drive_head register. We must make
+	 * sure that the desired drive is selected.
+	 */
+	hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
+	switch(task->data_phase) {
+
+   	        case TASKFILE_OUT_DMAQ:
+		case TASKFILE_OUT_DMA:
+		case TASKFILE_IN_DMAQ:
+		case TASKFILE_IN_DMA:
+			hwif->dma_setup(drive);
+			hwif->dma_exec_cmd(drive, taskfile->command);
+			hwif->dma_start(drive);
+			break;
+
+	        default:
+ 			if (task->handler == NULL)
+				return ide_stopped;
+
+			/* Issue the command */
+			if (task->prehandler) {
+				hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
+				ndelay(400);	/* FIXME */
+				return task->prehandler(drive, task->rq);
+			}
+			ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
+	}
+
+	return ide_started;
+}