X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fide%2Fide-taskfile.c;h=9233b8109a0f3a492d86471850870bf122dd90ce;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=98f4f3e4d573ef2c2dbde33cb313853abe280b2c;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 98f4f3e4d..9233b8109 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -5,7 +5,7 @@
  *  Copyright (C) 2000-2002	Andre Hedrick <andre@linux-ide.org>
  *  Copyright (C) 2001-2002	Klaus Smolin
  *					IBM Storage Technology Division
- *  Copyright (C) 2003		Bartlomiej Zolnierkiewicz
+ *  Copyright (C) 2003-2004	Bartlomiej Zolnierkiewicz
  *
  *  The big the bad and the ugly.
  *
@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/timer.h>
 #include <linux/mm.h>
+#include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/major.h>
 #include <linux/errno.h>
@@ -44,20 +45,12 @@
 #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>
-#include <asm/bitops.h>
-
-#define DEBUG_TASKFILE	0	/* unset when fixed */
-
-#if DEBUG_TASKFILE
-#define DTF(x...) printk(x)
-#else
-#define DTF(x...)
-#endif
 
 static void ata_bswap_data (void *buffer, int wcount)
 {
@@ -69,17 +62,14 @@ static void ata_bswap_data (void *buffer, int wcount)
 	}
 }
 
-
-void taskfile_input_data (ide_drive_t *drive, void *buffer, u32 wcount)
+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);
 }
 
-EXPORT_SYMBOL(taskfile_input_data);
-
-void taskfile_output_data (ide_drive_t *drive, void *buffer, u32 wcount)
+static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
 {
 	if (drive->bswap) {
 		ata_bswap_data(buffer, wcount);
@@ -90,8 +80,6 @@ void taskfile_output_data (ide_drive_t *drive, void *buffer, u32 wcount)
 	}
 }
 
-EXPORT_SYMBOL(taskfile_output_data);
-
 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
 {
 	ide_task_t args;
@@ -102,36 +90,11 @@ int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
 	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);
 }
 
-EXPORT_SYMBOL(taskfile_lib_get_identify);
-
-#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
-void debug_taskfile (ide_drive_t *drive, ide_task_t *args)
-{
-	printk(KERN_INFO "%s: ", drive->name);
-//	printk("TF.0=x%02x ", args->tfRegister[IDE_DATA_OFFSET]);
-	printk("TF.1=x%02x ", args->tfRegister[IDE_FEATURE_OFFSET]);
-	printk("TF.2=x%02x ", args->tfRegister[IDE_NSECTOR_OFFSET]);
-	printk("TF.3=x%02x ", args->tfRegister[IDE_SECTOR_OFFSET]);
-	printk("TF.4=x%02x ", args->tfRegister[IDE_LCYL_OFFSET]);
-	printk("TF.5=x%02x ", args->tfRegister[IDE_HCYL_OFFSET]);
-	printk("TF.6=x%02x ", args->tfRegister[IDE_SELECT_OFFSET]);
-	printk("TF.7=x%02x\n", args->tfRegister[IDE_COMMAND_OFFSET]);
-	printk(KERN_INFO "%s: ", drive->name);
-//	printk("HTF.0=x%02x ", args->hobRegister[IDE_DATA_OFFSET]);
-	printk("HTF.1=x%02x ", args->hobRegister[IDE_FEATURE_OFFSET]);
-	printk("HTF.2=x%02x ", args->hobRegister[IDE_NSECTOR_OFFSET]);
-	printk("HTF.3=x%02x ", args->hobRegister[IDE_SECTOR_OFFSET]);
-	printk("HTF.4=x%02x ", args->hobRegister[IDE_LCYL_OFFSET]);
-	printk("HTF.5=x%02x ", args->hobRegister[IDE_HCYL_OFFSET]);
-	printk("HTF.6=x%02x ", args->hobRegister[IDE_SELECT_OFFSET]);
-	printk("HTF.7=x%02x\n", args->hobRegister[IDE_CONTROL_OFFSET_HOB]);
-}
-#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */
-
 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
@@ -139,10 +102,6 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 	hob_struct_t *hobfile	= (hob_struct_t *) task->hobRegister;
 	u8 HIHI			= (drive->addressing == 1) ? 0xE0 : 0xEF;
 
-#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
-	void debug_taskfile(drive, task);
-#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */
-
 	/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
 	if (IDE_CONTROL_REG) {
 		/* clear nIEN */
@@ -165,7 +124,7 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 	hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
 
 	hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
-#ifdef CONFIG_IDE_TASKFILE_IO
+
 	if (task->handler != NULL) {
 		if (task->prehandler != NULL) {
 			hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
@@ -175,14 +134,6 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 		ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
 		return ide_started;
 	}
-#else
-	if (task->handler != NULL) {
-		ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
-		if (task->prehandler != NULL)
-			return task->prehandler(drive, task->rq);
-		return ide_started;
-	}
-#endif
 
 	if (!drive->using_dma)
 		return ide_stopped;
@@ -191,15 +142,15 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 		case WIN_WRITEDMA_ONCE:
 		case WIN_WRITEDMA:
 		case WIN_WRITEDMA_EXT:
-			if (!hwif->ide_dma_write(drive))
-				return ide_started;
-			break;
 		case WIN_READDMA_ONCE:
 		case WIN_READDMA:
 		case WIN_READDMA_EXT:
 		case WIN_IDENTIFY_DMA:
-			if (!hwif->ide_dma_read(drive))
+			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)
@@ -209,8 +160,6 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 	return ide_stopped;
 }
 
-EXPORT_SYMBOL(do_rw_taskfile);
-
 /*
  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
  */
@@ -229,8 +178,6 @@ ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 	return ide_stopped;
 }
 
-EXPORT_SYMBOL(set_multmode_intr);
-
 /*
  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
  */
@@ -247,7 +194,7 @@ ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 		return ide_stopped;
 
 	if (stat & (ERR_STAT|DRQ_STAT))
-		return DRIVER(drive)->error(drive, "set_geometry_intr", stat);
+		return ide_error(drive, "set_geometry_intr", stat);
 
 	if (HWGROUP(drive)->handler != NULL)
 		BUG();
@@ -255,8 +202,6 @@ ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 	return ide_started;
 }
 
-EXPORT_SYMBOL(set_geometry_intr);
-
 /*
  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
  */
@@ -266,12 +211,10 @@ ide_startstop_t recal_intr (ide_drive_t *drive)
 	u8 stat;
 
 	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
-		return DRIVER(drive)->error(drive, "recal_intr", stat);
+		return ide_error(drive, "recal_intr", stat);
 	return ide_stopped;
 }
 
-EXPORT_SYMBOL(recal_intr);
-
 /*
  * Handler for commands without a data phase
  */
@@ -283,9 +226,7 @@ ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 
 	local_irq_enable();
 	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
-		DTF("%s: command opcode 0x%02x\n", drive->name,
-			args->tfRegister[IDE_COMMAND_OFFSET]);
-		return DRIVER(drive)->error(drive, "task_no_data_intr", stat);
+		return ide_error(drive, "task_no_data_intr", stat);
 		/* calls ide_end_drive_cmd */
 	}
 	if (args)
@@ -296,317 +237,180 @@ ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 
 EXPORT_SYMBOL(task_no_data_intr);
 
-/*
- * old taskfile PIO handlers, to be killed as soon as possible.
- */
-#ifndef CONFIG_IDE_TASKFILE_IO
-
-/*
- * Handler for command with PIO data-in phase, READ
- */
-ide_startstop_t task_in_intr (ide_drive_t *drive)
+static u8 wait_drive_not_busy(ide_drive_t *drive)
 {
-	struct request *rq	= HWGROUP(drive)->rq;
-	ide_hwif_t *hwif	= HWIF(drive);
-	char *pBuf		= NULL;
+	ide_hwif_t *hwif = HWIF(drive);
+	int retries = 100;
 	u8 stat;
 
-	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),DATA_READY,BAD_R_STAT)) {
-		if (stat & (ERR_STAT|DRQ_STAT)) {
-			return DRIVER(drive)->error(drive, "task_in_intr", stat);
-		}
-		if (!(stat & BUSY_STAT)) {
-			DTF("task_in_intr to Soon wait for next interrupt\n");
-			if (HWGROUP(drive)->handler == NULL)
-				ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
-			return ide_started;  
-		}
-	}
-
-	pBuf = rq->buffer + task_rq_offset(rq);
-	DTF("Read: %p, rq->current_nr_sectors: %d, stat: %02x\n",
-		pBuf, (int) rq->current_nr_sectors, stat);
-	taskfile_input_data(drive, pBuf, SECTOR_WORDS);
-
-	/* FIXME: check drive status */
-	if (--rq->current_nr_sectors <= 0)
-		if (!DRIVER(drive)->end_request(drive, 1, 0))
-			return ide_stopped;
 	/*
-	 * ERM, it is techincally legal to leave/exit here but it makes
-	 * a mess of the code ...
+	 * 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).
 	 */
-	if (HWGROUP(drive)->handler == NULL)
-		ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
-	return ide_started;
-}
+	while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
+		udelay(10);
 
-EXPORT_SYMBOL(task_in_intr);
+	if (!retries)
+		printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 
-/*
- * Handler for command with Read Multiple
- */
-ide_startstop_t task_mulin_intr (ide_drive_t *drive)
+	return stat;
+}
+
+static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 {
-	ide_hwif_t *hwif	= HWIF(drive);
-	struct request *rq	= HWGROUP(drive)->rq;
-	char *pBuf		= NULL;
-	unsigned int msect	= drive->mult_count;
-	unsigned int nsect;
-	u8 stat;
+	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;
 
-	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),DATA_READY,BAD_R_STAT)) {
-		if (stat & (ERR_STAT|DRQ_STAT)) {
-			return DRIVER(drive)->error(drive, "task_mulin_intr", stat);
-		}
-		/* no data yet, so wait for another interrupt */
-		if (HWGROUP(drive)->handler == NULL)
-			ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
-		return ide_started;
-	}
+	page = sg[hwif->cursg].page;
+	offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE;
 
-	do {
-		nsect = rq->current_nr_sectors;
-		if (nsect > msect)
-			nsect = msect;
-		pBuf = rq->buffer + task_rq_offset(rq);
-		DTF("Multiread: %p, nsect: %d, msect: %d, " \
-			" rq->current_nr_sectors: %d\n",
-			pBuf, nsect, msect, rq->current_nr_sectors);
-		taskfile_input_data(drive, pBuf, nsect * SECTOR_WORDS);
-		rq->errors = 0;
-		rq->current_nr_sectors -= nsect;
-		msect -= nsect;
+	/* get the current page and offset */
+	page = nth_page(page, (offset >> PAGE_SHIFT));
+	offset %= PAGE_SIZE;
 
-		/* FIXME: check drive status */
-		if (!rq->current_nr_sectors) {
-			if (!DRIVER(drive)->end_request(drive, 1, 0))
-				return ide_stopped;
-		}
-	} while (msect);
-	if (HWGROUP(drive)->handler == NULL)
-		ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
-	return ide_started;
-}
+#ifdef CONFIG_HIGHMEM
+	local_irq_save(flags);
+#endif
+	buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 
-EXPORT_SYMBOL(task_mulin_intr);
+	hwif->nleft--;
+	hwif->cursg_ofs++;
 
-/*
- * VERIFY ME before 2.4 ... unexpected race is possible based on details
- * RMK with 74LS245/373/374 TTL buffer logic because of passthrough.
- */
-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 WRITE%s\n",
-			drive->name,
-			drive->addressing ? "_EXT" : "");
-		return startstop;
+	if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) {
+		hwif->cursg++;
+		hwif->cursg_ofs = 0;
 	}
-	/* For Write_sectors we need to stuff the first sector */
-	taskfile_output_data(drive, rq->buffer + task_rq_offset(rq), SECTOR_WORDS);
-	rq->current_nr_sectors--;
-	return ide_started;
-}
 
-EXPORT_SYMBOL(pre_task_out_intr);
+	/* do the actual data transfer */
+	if (write)
+		taskfile_output_data(drive, buf, SECTOR_WORDS);
+	else
+		taskfile_input_data(drive, buf, SECTOR_WORDS);
 
-/*
- * Handler for command with PIO data-out phase WRITE
- *
- * WOOHOO this is a CORRECT STATE DIAGRAM NOW, <andre@linux-ide.org>
- */
-ide_startstop_t task_out_intr (ide_drive_t *drive)
+	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)
 {
-	ide_hwif_t *hwif	= HWIF(drive);
-	struct request *rq	= HWGROUP(drive)->rq;
-	char *pBuf		= NULL;
-	u8 stat;
+	unsigned int nsect;
 
-	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), DRIVE_READY, drive->bad_wstat)) {
-		return DRIVER(drive)->error(drive, "task_out_intr", stat);
-	}
-	/*
-	 * Safe to update request for partial completions.
-	 * We have a good STATUS CHECK!!!
-	 */
-	if (!rq->current_nr_sectors)
-		if (!DRIVER(drive)->end_request(drive, 1, 0))
-			return ide_stopped;
-	if ((rq->current_nr_sectors==1) ^ (stat & DRQ_STAT)) {
-		rq = HWGROUP(drive)->rq;
-		pBuf = rq->buffer + task_rq_offset(rq);
-		DTF("write: %p, rq->current_nr_sectors: %d\n",
-			pBuf, (int) rq->current_nr_sectors);
-		taskfile_output_data(drive, pBuf, SECTOR_WORDS);
-		rq->errors = 0;
-		rq->current_nr_sectors--;
-	}
-	if (HWGROUP(drive)->handler == NULL)
-		ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
-	return ide_started;
+	nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
+	while (nsect--)
+		ide_pio_sector(drive, write);
 }
 
-EXPORT_SYMBOL(task_out_intr);
-
-ide_startstop_t pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
+static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
+				     unsigned int write)
 {
-	ide_task_t *args = rq->special;
-	ide_startstop_t startstop;
+	if (rq->bio)	/* fs request */
+		rq->errors = 0;
 
-	if (ide_wait_stat(&startstop, drive, DATA_READY,
-			drive->bad_wstat, WAIT_DRQ)) {
-		printk(KERN_ERR "%s: no DRQ after issuing %s\n",
-			drive->name,
-			drive->addressing ? "MULTWRITE_EXT" : "MULTWRITE");
-		return startstop;
-	}
-	if (!(drive_is_ready(drive))) {
-		int i;
-		for (i=0; i<100; i++) {
-			if (drive_is_ready(drive))
-				break;
-		}
-	}
+	touch_softlockup_watchdog();
 
-	/*
-	 * WARNING :: if the drive as not acked good status we may not
-	 * move the DATA-TRANSFER T-Bar as BSY != 0. <andre@linux-ide.org>
-	 */
-	return args->handler(drive);
+	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;
+	}
 }
 
-EXPORT_SYMBOL(pre_task_mulout_intr);
-
-/*
- * Handler for command write multiple
- * Called directly from execute_drive_cmd for the first bunch of sectors,
- * afterwards only by the ISR
- */
-ide_startstop_t task_mulout_intr (ide_drive_t *drive)
+static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
+				  const char *s, u8 stat)
 {
-	ide_hwif_t *hwif		= HWIF(drive);
-	u8 stat				= hwif->INB(IDE_STATUS_REG);
-	struct request *rq		= HWGROUP(drive)->rq;
-	char *pBuf			= NULL;
-	unsigned int msect		= drive->mult_count;
-	unsigned int nsect;
+	if (rq->bio) {
+		ide_hwif_t *hwif = drive->hwif;
+		int sectors = hwif->nsect - hwif->nleft;
 
-	if (!OK_STAT(stat, DATA_READY, BAD_R_STAT) || !rq->current_nr_sectors) {
-		if (stat & (ERR_STAT|DRQ_STAT)) {
-			return DRIVER(drive)->error(drive, "task_mulout_intr", stat);
-		}
-		/* Handle last IRQ, occurs after all data was sent. */
-		if (!rq->current_nr_sectors) {
-			DRIVER(drive)->end_request(drive, 1, 0);
-			return ide_stopped;
+		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;
 		}
-		/* no data yet, so wait for another interrupt */
-		if (HWGROUP(drive)->handler == NULL)
-			ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
-		return ide_started;
-	}
 
-	if (HWGROUP(drive)->handler != NULL) {
-		unsigned long lflags;
-		spin_lock_irqsave(&ide_lock, lflags);
-		HWGROUP(drive)->handler = NULL;
-		del_timer(&HWGROUP(drive)->timer);
-		spin_unlock_irqrestore(&ide_lock, lflags);
-	}
+		if (sectors > 0) {
+			ide_driver_t *drv;
 
-	do {
-		nsect = rq->current_nr_sectors;
-		if (nsect > msect)
-			nsect = msect;
-		pBuf = rq->buffer + task_rq_offset(rq);
-		DTF("Multiwrite: %p, nsect: %d, msect: %d, " \
-			"rq->current_nr_sectors: %ld\n",
-			pBuf, nsect, msect, rq->current_nr_sectors);
-		msect -= nsect;
-		taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
-		rq->current_nr_sectors -= nsect;
-
-		/* FIXME: check drive status */
-		if (!rq->current_nr_sectors) {
-			if (!DRIVER(drive)->end_request(drive, 1, 0))
-				if (!rq->bio)
-					return ide_stopped;
+			drv = *(ide_driver_t **)rq->rq_disk->private_data;
+			drv->end_request(drive, 1, sectors);
 		}
-	} while (msect);
-	rq->errors = 0;
-	if (HWGROUP(drive)->handler == NULL)
-		ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
-	return ide_started;
+	}
+	return ide_error(drive, s, stat);
 }
 
-EXPORT_SYMBOL(task_mulout_intr);
-
-#else /* !CONFIG_IDE_TASKFILE_IO */
-
-static u8 wait_drive_not_busy(ide_drive_t *drive)
+static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 {
-	ide_hwif_t *hwif = HWIF(drive);
-	int retries = 100;
-	u8 stat;
+	if (rq->flags & REQ_DRIVE_TASKFILE) {
+		ide_task_t *task = rq->special;
 
-	/*
-	 * 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 (task->tf_out_flags.all) {
+			u8 err = drive->hwif->INB(IDE_ERROR_REG);
+			ide_end_drive_cmd(drive, stat, err);
+			return;
+		}
+	}
 
-	if (!retries)
-		printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
+	if (rq->rq_disk) {
+		ide_driver_t *drv;
 
-	return stat;
+		drv = *(ide_driver_t **)rq->rq_disk->private_data;;
+		drv->end_request(drive, 1, rq->hard_nr_sectors);
+	} else
+		ide_end_request(drive, 1, rq->hard_nr_sectors);
 }
 
 /*
- * Handler for command with PIO data-in phase (Read).
+ * 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, good_stat;
+	u8 stat = hwif->INB(IDE_STATUS_REG);
 
-	good_stat = DATA_READY;
-	stat = HWIF(drive)->INB(IDE_STATUS_REG);
-check_status:
-	if (!OK_STAT(stat, good_stat, BAD_R_STAT)) {
+	/* 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 DRIVER(drive)->error(drive, __FUNCTION__, stat);
-		/* BUSY_STAT: No data yet, so wait for another IRQ. */
+			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;
 	}
 
-	/*
-	 * Complete previously submitted bios (if any).
-	 * Status was already verifyied.
-	 */
-	while (rq->bio != rq->cbio)
-		if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
-			return ide_stopped;
-	/* Complete rq->buffer based request (ioctls). */
-	if (!rq->bio && !rq->nr_sectors) {
-		ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
-		return ide_stopped;
-	}
-
-	rq->errors = 0;
-	task_sectors(drive, rq, 1, IDE_PIO_IN);
+	ide_pio_datablock(drive, rq, 0);
 
 	/* If it was the last datablock check status and finish transfer. */
-	if (!rq->nr_sectors) {
-		good_stat = 0;
+	if (!hwif->nleft) {
 		stat = wait_drive_not_busy(drive);
-		goto check_status;
+		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. */
@@ -617,216 +421,57 @@ check_status:
 EXPORT_SYMBOL(task_in_intr);
 
 /*
- * Handler for command with PIO data-in phase (Read Multiple).
+ * Handler for command with PIO data-out phase (Write/Write Multiple).
  */
-ide_startstop_t task_mulin_intr (ide_drive_t *drive)
+static ide_startstop_t task_out_intr (ide_drive_t *drive)
 {
+	ide_hwif_t *hwif = drive->hwif;
 	struct request *rq = HWGROUP(drive)->rq;
-	unsigned int msect = drive->mult_count;
-	unsigned int nsect;
-	u8 stat, good_stat;
+	u8 stat = hwif->INB(IDE_STATUS_REG);
 
-	good_stat = DATA_READY;
-	stat = HWIF(drive)->INB(IDE_STATUS_REG);
-check_status:
-	if (!OK_STAT(stat, good_stat, BAD_R_STAT)) {
-		if (stat & (ERR_STAT | DRQ_STAT))
-			return DRIVER(drive)->error(drive, __FUNCTION__, stat);
-		/* BUSY_STAT: No data yet, so wait for another IRQ. */
-		ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
-		return ide_started;
-	}
-
-	/*
-	 * Complete previously submitted bios (if any).
-	 * Status was already verifyied.
-	 */
-	while (rq->bio != rq->cbio)
-		if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
-			return ide_stopped;
-	/* Complete rq->buffer based request (ioctls). */
-	if (!rq->bio && !rq->nr_sectors) {
-		ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
-		return ide_stopped;
-	}
-
-	rq->errors = 0;
-	do {
-		nsect = rq->current_nr_sectors;
-		if (nsect > msect)
-			nsect = msect;
-
-		task_sectors(drive, rq, nsect, IDE_PIO_IN);
-
-		if (!rq->nr_sectors)
-			msect = 0;
-		else
-			msect -= nsect;
-	} while (msect);
-
-	/* If it was the last datablock check status and finish transfer. */
-	if (!rq->nr_sectors) {
-		good_stat = 0;
-		stat = wait_drive_not_busy(drive);
-		goto check_status;
-	}
-
-	/* Still data left to transfer. */
-	ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
-
-	return ide_started;
-}
-EXPORT_SYMBOL(task_mulin_intr);
-
-/*
- * Handler for command with PIO data-out phase (Write).
- */
-ide_startstop_t task_out_intr (ide_drive_t *drive)
-{
-	struct request *rq = HWGROUP(drive)->rq;
-	u8 stat;
-
-	stat = HWIF(drive)->INB(IDE_STATUS_REG);
-	if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) {
-		if ((stat & (ERR_STAT | DRQ_STAT)) ||
-		    ((stat & WRERR_STAT) && !drive->nowerr))
-			return DRIVER(drive)->error(drive, __FUNCTION__, stat);
-		if (stat & BUSY_STAT) {
-			/* Not ready yet, so wait for another IRQ. */
-			ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
-			return ide_started;
-		}
-	}
+	if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
+		return task_error(drive, rq, __FUNCTION__, stat);
 
 	/* Deal with unexpected ATA data phase. */
-	if ((!(stat & DATA_READY) && rq->nr_sectors) ||
-	    ((stat & DATA_READY) && !rq->nr_sectors))
-		return DRIVER(drive)->error(drive, __FUNCTION__, stat);
+	if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
+		return task_error(drive, rq, __FUNCTION__, stat);
 
-	/* 
-	 * Complete previously submitted bios (if any).
-	 * Status was already verifyied.
-	 */
-	while (rq->bio != rq->cbio)
-		if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
-			return ide_stopped;
-	/* Complete rq->buffer based request (ioctls). */
-	if (!rq->bio && !rq->nr_sectors) {
-		ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
+	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);
 
-	rq->errors = 0;
-	task_sectors(drive, rq, 1, IDE_PIO_OUT);
-
 	return ide_started;
 }
 
-EXPORT_SYMBOL(task_out_intr);
-
 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 WRITE%s\n",
-				drive->name, drive->addressing ? "_EXT" : "");
+		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();
 
-	return task_out_intr(drive);
-}
-EXPORT_SYMBOL(pre_task_out_intr);
-
-/*
- * Handler for command with PIO data-out phase (Write Multiple).
- */
-ide_startstop_t task_mulout_intr (ide_drive_t *drive)
-{
-	struct request *rq = HWGROUP(drive)->rq;
-	unsigned int msect = drive->mult_count;
-	unsigned int nsect;
-	u8 stat;
-
-	stat = HWIF(drive)->INB(IDE_STATUS_REG);
-	if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) {
-		if ((stat & (ERR_STAT | DRQ_STAT)) ||
-		    ((stat & WRERR_STAT) && !drive->nowerr))
-			return DRIVER(drive)->error(drive, __FUNCTION__, stat);
-		if (stat & BUSY_STAT) {
-			/* Not ready yet, so wait for another IRQ. */
-			ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
-			return ide_started;
-		}
-	}
-
-	/* Deal with unexpected ATA data phase. */
-	if ((!(stat & DATA_READY) && rq->nr_sectors) ||
-	    ((stat & DATA_READY) && !rq->nr_sectors))
-		return DRIVER(drive)->error(drive, __FUNCTION__, stat);
-
-	/* 
-	 * Complete previously submitted bios (if any).
-	 * Status was already verifyied.
-	 */
-	while (rq->bio != rq->cbio)
-		if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
-			return ide_stopped;
-	/* Complete rq->buffer based request (ioctls). */
-	if (!rq->bio && !rq->nr_sectors) {
-		ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
-		return ide_stopped;
-	}
-
-	/* Still data left to transfer. */
-	ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
-
-	rq->errors = 0;
-	do {
-		nsect = rq->current_nr_sectors;
-		if (nsect > msect)
-			nsect = msect;
-
-		task_sectors(drive, rq, nsect, IDE_PIO_OUT);
-
-		if (!rq->nr_sectors)
-			msect = 0;
-		else
-			msect -= nsect;
-	} while (msect);
+	ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
+	ide_pio_datablock(drive, rq, 1);
 
 	return ide_started;
 }
-EXPORT_SYMBOL(task_mulout_intr);
-
-ide_startstop_t pre_task_mulout_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 MULTWRITE%s\n",
-				drive->name, drive->addressing ? "_EXT" : "");
-		return startstop;
-	}
-
-	if (!drive->unmask)
-		local_irq_disable();
-
-	return task_mulout_intr(drive);
-}
-EXPORT_SYMBOL(pre_task_mulout_intr);
-
-#endif /* !CONFIG_IDE_TASKFILE_IO */
+EXPORT_SYMBOL(pre_task_out_intr);
 
-int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
+static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
 {
 	struct request rq;
 
@@ -854,14 +499,16 @@ int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_
 
 		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;
+	args->rq = &rq;
 	return ide_do_drive_cmd(drive, &rq, ide_wait);
 }
 
-EXPORT_SYMBOL(ide_diag_taskfile);
-
 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
 {
 	return ide_diag_taskfile(drive, args, 0, buf);
@@ -869,17 +516,6 @@ int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
 
 EXPORT_SYMBOL(ide_raw_taskfile);
 
-#define MAX_DMA		(256*SECTOR_WORDS)
-
-ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
-ide_startstop_t flagged_task_no_data_intr(ide_drive_t *);
-ide_startstop_t flagged_task_in_intr(ide_drive_t *);
-ide_startstop_t flagged_task_mulin_intr(ide_drive_t *);
-ide_startstop_t flagged_pre_task_out_intr(ide_drive_t *, struct request *);
-ide_startstop_t flagged_task_out_intr(ide_drive_t *);
-ide_startstop_t flagged_pre_task_mulout_intr(ide_drive_t *, struct request *);
-ide_startstop_t flagged_task_mulout_intr(ide_drive_t *);
-
 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 {
 	ide_task_request_t	*req_task;
@@ -897,9 +533,8 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 
 //	printk("IDE Taskfile ...\n");
 
-	req_task = kmalloc(tasksize, GFP_KERNEL);
+	req_task = kzalloc(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;
@@ -910,12 +545,11 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 
 	if (taskout) {
 		int outtotal = tasksize;
-		outbuf = kmalloc(taskout, GFP_KERNEL);
+		outbuf = kzalloc(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;
@@ -924,12 +558,11 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 
 	if (taskin) {
 		int intotal = tasksize + taskout;
-		inbuf = kmalloc(taskin, GFP_KERNEL);
+		inbuf = kzalloc(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;
@@ -955,19 +588,6 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 		case TASKFILE_IN_DMA:
 			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 			break;
-		case TASKFILE_IN_OUT:
-#if 0
-			args.prehandler = &pre_task_out_intr;
-			args.handler = &task_out_intr;
-			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
-			args.prehandler = NULL;
-			args.handler = &task_in_intr;
-			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
-			break;
-#else
-			err = -EFAULT;
-			goto abort;
-#endif
 		case TASKFILE_MULTI_OUT:
 			if (!drive->mult_count) {
 				/* (hs): give up if multcount is not set */
@@ -977,23 +597,10 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 				err = -EPERM;
 				goto abort;
 			}
-			if (args.tf_out_flags.all != 0) {
-				args.prehandler = &flagged_pre_task_mulout_intr;
-				args.handler = &flagged_task_mulout_intr;
-			} else {
-				args.prehandler = &pre_task_mulout_intr;
-				args.handler = &task_mulout_intr;
-			}
-			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
-			break;
+			/* fall through */
 		case TASKFILE_OUT:
-			if (args.tf_out_flags.all != 0) {
-				args.prehandler = &flagged_pre_task_out_intr;
-				args.handler    = &flagged_task_out_intr;
-			} else {
-				args.prehandler = &pre_task_out_intr;
-				args.handler = &task_out_intr;
-			}
+			args.prehandler = &pre_task_out_intr;
+			args.handler = &task_out_intr;
 			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 			break;
 		case TASKFILE_MULTI_IN:
@@ -1005,27 +612,13 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 				err = -EPERM;
 				goto abort;
 			}
-			if (args.tf_out_flags.all != 0) {
-				args.handler = &flagged_task_mulin_intr;
-			} else {
-				args.handler = &task_mulin_intr;
-			}
-			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
-			break;
+			/* fall through */
 		case TASKFILE_IN:
-			if (args.tf_out_flags.all != 0) {
-				args.handler = &flagged_task_in_intr;
-			} else {
-				args.handler = &task_in_intr;
-			}
+			args.handler = &task_in_intr;
 			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 			break;
 		case TASKFILE_NO_DATA:
-			if (args.tf_out_flags.all != 0) {
-				args.handler = &flagged_task_no_data_intr;
-			} else {
-				args.handler = &task_no_data_intr;
-			}
+			args.handler = &task_no_data_intr;
 			err = ide_diag_taskfile(drive, &args, 0, NULL);
 			break;
 		default:
@@ -1058,10 +651,8 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 	}
 abort:
 	kfree(req_task);
-	if (outbuf != NULL)
-		kfree(outbuf);
-	if (inbuf != NULL)
-		kfree(inbuf);
+	kfree(outbuf);
+	kfree(inbuf);
 
 //	printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 
@@ -1070,8 +661,6 @@ abort:
 	return err;
 }
 
-EXPORT_SYMBOL(ide_taskfile_ioctl);
-
 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 {
 	struct request rq;
@@ -1089,8 +678,6 @@ int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors,
 	return ide_do_drive_cmd(drive, &rq, ide_wait);
 }
 
-EXPORT_SYMBOL(ide_wait_cmd);
-
 /*
  * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
  */
@@ -1122,10 +709,9 @@ int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 
 	if (args[3]) {
 		argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
-		argbuf = kmalloc(argsize, GFP_KERNEL);
+		argbuf = kzalloc(argsize, GFP_KERNEL);
 		if (argbuf == NULL)
 			return -ENOMEM;
-		memcpy(argbuf, args, 4);
 	}
 	if (set_transfer(drive, &tfargs)) {
 		xfer_rate = args[1];
@@ -1148,9 +734,7 @@ abort:
 	return err;
 }
 
-EXPORT_SYMBOL(ide_cmd_ioctl);
-
-int ide_wait_cmd_task (ide_drive_t *drive, u8 *buf)
+static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
 {
 	struct request rq;
 
@@ -1160,8 +744,6 @@ int ide_wait_cmd_task (ide_drive_t *drive, u8 *buf)
 	return ide_do_drive_cmd(drive, &rq, ide_wait);
 }
 
-EXPORT_SYMBOL(ide_wait_cmd_task);
-
 /*
  * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
  */
@@ -1180,8 +762,6 @@ int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 	return err;
 }
 
-EXPORT_SYMBOL(ide_task_ioctl);
-
 /*
  * NOTICE: This is additions from IBM to provide a discrete interface,
  * for selective taskregister access operations.  Nice JOB Klaus!!!
@@ -1192,29 +772,23 @@ 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
 
-
-#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
-	void debug_taskfile(drive, task);
-#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */
+	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.
+	 * (ks) Check taskfile in 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)
+	 *	read all taskfile registers (except data)
+	 *	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)
@@ -1227,16 +801,6 @@ ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 		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);
@@ -1267,8 +831,8 @@ ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 		hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
 
         /*
-	 * (ks) In the flagged taskfile approch, we will used all specified
-	 * registers and the register value will not be changed. Except the
+	 * (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.
 	 */
@@ -1277,12 +841,11 @@ ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 
    	        case TASKFILE_OUT_DMAQ:
 		case TASKFILE_OUT_DMA:
-			hwif->ide_dma_write(drive);
-			break;
-
 		case TASKFILE_IN_DMAQ:
 		case TASKFILE_IN_DMA:
-			hwif->ide_dma_read(drive);
+			hwif->dma_setup(drive);
+			hwif->dma_exec_cmd(drive, taskfile->command);
+			hwif->dma_start(drive);
 			break;
 
 	        default:
@@ -1290,277 +853,13 @@ ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 				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);
-			if (task->prehandler != NULL)
-				return task->prehandler(drive, HWGROUP(drive)->rq);
-	}
-
-	return ide_started;
-}
-
-EXPORT_SYMBOL(flagged_taskfile);
-
-ide_startstop_t flagged_task_no_data_intr (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = HWIF(drive);
-	u8 stat;
-
-	local_irq_enable();
-
-	if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) {
-		if (stat & ERR_STAT) {
-			return DRIVER(drive)->error(drive, "flagged_task_no_data_intr", stat);
-		}
-		/*
-		 * (ks) Unexpected ATA data phase detected.
-		 * This should not happen. But, it can !
-		 * I am not sure, which function is best to clean up
-		 * this situation.  I choose: ide_error(...)
-		 */
- 		return DRIVER(drive)->error(drive, "flagged_task_no_data_intr (unexpected phase)", stat); 
-	}
-
-	ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
-
-	return ide_stopped;
-}
-
-/*
- * Handler for command with PIO data-in phase
- */
-ide_startstop_t flagged_task_in_intr (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 stat			= hwif->INB(IDE_STATUS_REG);
-	struct request *rq	= HWGROUP(drive)->rq;
-	char *pBuf		= NULL;
-	int retries             = 5;
-
-	if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
-		if (stat & ERR_STAT) {
-			return DRIVER(drive)->error(drive, "flagged_task_in_intr", stat);
-		}
-		/*
-		 * (ks) Unexpected ATA data phase detected.
-		 * This should not happen. But, it can !
-		 * I am not sure, which function is best to clean up
-		 * this situation.  I choose: ide_error(...)
-		 */
-		return DRIVER(drive)->error(drive, "flagged_task_in_intr (unexpected data phase)", stat); 
-	}
-
-	pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
-	DTF("Read - rq->current_nr_sectors: %d, status: %02x\n", (int) rq->current_nr_sectors, stat);
-
-	taskfile_input_data(drive, pBuf, SECTOR_WORDS);
-
-	if (--rq->current_nr_sectors != 0) {
-		/*
-                 * (ks) We don't know which command was executed. 
-		 * So, we wait the 'WORSTCASE' value.
-                 */
-		ide_set_handler(drive, &flagged_task_in_intr,  WAIT_WORSTCASE, NULL);
-		return ide_started;
-	}
-	/*
-	 * (ks) Last sector was transfered, wait until drive is ready. 
-	 * This can take up to 10 usec. We willl wait max 50 us.
-	 */
-	while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
-		udelay(10);
-	ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
-
-	return ide_stopped;
-}
-
-ide_startstop_t flagged_task_mulin_intr (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 stat			= hwif->INB(IDE_STATUS_REG);
-	struct request *rq	= HWGROUP(drive)->rq;
-	char *pBuf		= NULL;
-	int retries             = 5;
-	unsigned int msect, nsect;
-
-	msect = drive->mult_count;
-	if (msect == 0) 
-		return DRIVER(drive)->error(drive, "flagged_task_mulin_intr (multimode not set)", stat); 
-
-	if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
-		if (stat & ERR_STAT) {
-			return DRIVER(drive)->error(drive, "flagged_task_mulin_intr", stat);
-		}
-		/*
-		 * (ks) Unexpected ATA data phase detected.
-		 * This should not happen. But, it can !
-		 * I am not sure, which function is best to clean up
-		 * this situation.  I choose: ide_error(...)
-		 */
-		return DRIVER(drive)->error(drive, "flagged_task_mulin_intr (unexpected data phase)", stat); 
-	}
-
-	nsect = (rq->current_nr_sectors > msect) ? msect : rq->current_nr_sectors;
-	pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
-
-	DTF("Multiread: %p, nsect: %d , rq->current_nr_sectors: %ld\n",
-	    pBuf, nsect, rq->current_nr_sectors);
-
-	taskfile_input_data(drive, pBuf, nsect * SECTOR_WORDS);
-
-	rq->current_nr_sectors -= nsect;
-	if (rq->current_nr_sectors != 0) {
-		/*
-                 * (ks) We don't know which command was executed. 
-		 * So, we wait the 'WORSTCASE' value.
-                 */
-		ide_set_handler(drive, &flagged_task_mulin_intr,  WAIT_WORSTCASE, NULL);
-		return ide_started;
-	}
-
-	/*
-	 * (ks) Last sector was transfered, wait until drive is ready. 
-	 * This can take up to 10 usec. We willl wait max 50 us.
-	 */
-	while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
-		udelay(10);
-	ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
-
-	return ide_stopped;
-}
-
-/*
- * Pre handler for command with PIO data-out phase
- */
-ide_startstop_t flagged_pre_task_out_intr (ide_drive_t *drive, struct request *rq)
-{
-	ide_startstop_t startstop;
-
-	if (ide_wait_stat(&startstop, drive, DATA_READY,
-			BAD_W_STAT, WAIT_DRQ)) {
-		printk(KERN_ERR "%s: No DRQ bit after issuing write command.\n", drive->name);
-		return startstop;
 	}
 
-	taskfile_output_data(drive, rq->buffer, SECTOR_WORDS);
-	--rq->current_nr_sectors;
-
-	return ide_started;
-}
-
-ide_startstop_t flagged_task_out_intr (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 stat			= hwif->INB(IDE_STATUS_REG);
-	struct request *rq	= HWGROUP(drive)->rq;
-	char *pBuf		= NULL;
-
-	if (!OK_STAT(stat, DRIVE_READY, BAD_W_STAT)) 
-		return DRIVER(drive)->error(drive, "flagged_task_out_intr", stat);
-	
-	if (!rq->current_nr_sectors) { 
-		ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
-		return ide_stopped;
-	}
-
-	if (!OK_STAT(stat, DATA_READY, BAD_W_STAT)) {
-		/*
-		 * (ks) Unexpected ATA data phase detected.
-		 * This should not happen. But, it can !
-		 * I am not sure, which function is best to clean up
-		 * this situation.  I choose: ide_error(...)
-		 */
-		return DRIVER(drive)->error(drive, "flagged_task_out_intr (unexpected data phase)", stat); 
-	}
-
-	pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
-	DTF("Write - rq->current_nr_sectors: %d, status: %02x\n",
-		(int) rq->current_nr_sectors, stat);
-
-	taskfile_output_data(drive, pBuf, SECTOR_WORDS);
-	--rq->current_nr_sectors;
-
-	/*
-	 * (ks) We don't know which command was executed. 
-	 * So, we wait the 'WORSTCASE' value.
-	 */
-	ide_set_handler(drive, &flagged_task_out_intr, WAIT_WORSTCASE, NULL);
-
-	return ide_started;
-}
-
-ide_startstop_t flagged_pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 stat			= hwif->INB(IDE_STATUS_REG);
-	char *pBuf		= NULL;
-	ide_startstop_t startstop;
-	unsigned int msect, nsect;
-
-	msect = drive->mult_count;
-	if (msect == 0)
-		return DRIVER(drive)->error(drive, "flagged_pre_task_mulout_intr (multimode not set)", stat);
-
-	if (ide_wait_stat(&startstop, drive, DATA_READY,
-			BAD_W_STAT, WAIT_DRQ)) {
-		printk(KERN_ERR "%s: No DRQ bit after issuing write command.\n", drive->name);
-		return startstop;
-	}
-
-	nsect = (rq->current_nr_sectors > msect) ? msect : rq->current_nr_sectors;
-	pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
-	DTF("Multiwrite: %p, nsect: %d , rq->current_nr_sectors: %ld\n",
-	    pBuf, nsect, rq->current_nr_sectors);
-
-	taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
-
-	rq->current_nr_sectors -= nsect;
-
-	return ide_started;
-}
-
-ide_startstop_t flagged_task_mulout_intr (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 stat			= hwif->INB(IDE_STATUS_REG);
-	struct request *rq	= HWGROUP(drive)->rq;
-	char *pBuf		= NULL;
-	unsigned int msect, nsect;
-
-	msect = drive->mult_count;
-	if (msect == 0)
-		return DRIVER(drive)->error(drive, "flagged_task_mulout_intr (multimode not set)", stat);
-
-	if (!OK_STAT(stat, DRIVE_READY, BAD_W_STAT)) 
-		return DRIVER(drive)->error(drive, "flagged_task_mulout_intr", stat);
-	
-	if (!rq->current_nr_sectors) { 
-		ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
-		return ide_stopped;
-	}
-
-	if (!OK_STAT(stat, DATA_READY, BAD_W_STAT)) {
-		/*
-		 * (ks) Unexpected ATA data phase detected.
-		 * This should not happen. But, it can !
-		 * I am not sure, which function is best to clean up
-		 * this situation.  I choose: ide_error(...)
-		 */
-		return DRIVER(drive)->error(drive, "flagged_task_mulout_intr (unexpected data phase)", stat); 
-	}
-
-	nsect = (rq->current_nr_sectors > msect) ? msect : rq->current_nr_sectors;
-	pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
-	DTF("Multiwrite: %p, nsect: %d , rq->current_nr_sectors: %ld\n",
-	    pBuf, nsect, rq->current_nr_sectors);
-
-	taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
-	rq->current_nr_sectors -= nsect;
-
-	/*
-	 * (ks) We don't know which command was executed. 
-	 * So, we wait the 'WORSTCASE' value.
-	 */
-	ide_set_handler(drive, &flagged_task_mulout_intr, WAIT_WORSTCASE, NULL);
-
 	return ide_started;
 }