Merge branch 'linus' into genirq

1 files changed, 66 insertions, 453 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index adc68275585..fffd11717b2 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -28,24 +28,13 @@
  * for supplying a Promise UDMA board & WD UDMA drive for this work!
  */
 
-#include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
 #include <linux/ide.h>
-#include <linux/delay.h>
 #include <linux/scatterlist.h>
 #include <linux/dma-mapping.h>
 
-#include <asm/io.h>
-#include <asm/irq.h>
-
-static const struct drive_list_entry drive_whitelist [] = {
-
+static const struct drive_list_entry drive_whitelist[] = {
 	{ "Micropolis 2112A"	,       NULL		},
 	{ "CONNER CTMA 4000"	,       NULL		},
 	{ "CONNER CTT8000-A"	,       NULL		},
@@ -53,8 +42,7 @@ static const struct drive_list_entry drive_whitelist [] = {
 	{ NULL			,	NULL		}
 };
 
-static const struct drive_list_entry drive_blacklist [] = {
-
+static const struct drive_list_entry drive_blacklist[] = {
 	{ "WDC AC11000H"	,	NULL 		},
 	{ "WDC AC22100H"	,	NULL 		},
 	{ "WDC AC32500H"	,	NULL 		},
@@ -94,11 +82,11 @@ static const struct drive_list_entry drive_blacklist [] = {
  *	ide_dma_intr	-	IDE DMA interrupt handler
  *	@drive: the drive the interrupt is for
  *
- *	Handle an interrupt completing a read/write DMA transfer on an 
+ *	Handle an interrupt completing a read/write DMA transfer on an
  *	IDE device
  */
- 
-ide_startstop_t ide_dma_intr (ide_drive_t *drive)
+
+ide_startstop_t ide_dma_intr(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	u8 stat = 0, dma_stat = 0;
@@ -106,22 +94,21 @@ ide_startstop_t ide_dma_intr (ide_drive_t *drive)
 	dma_stat = hwif->dma_ops->dma_end(drive);
 	stat = hwif->tp_ops->read_status(hwif);
 
-	if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
+	if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
 		if (!dma_stat) {
-			struct request *rq = HWGROUP(drive)->rq;
+			struct request *rq = hwif->hwgroup->rq;
 
 			task_end_request(drive, rq, stat);
 			return ide_stopped;
 		}
-		printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n", 
-		       drive->name, dma_stat);
+		printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
+			drive->name, __func__, dma_stat);
 	}
 	return ide_error(drive, "dma_intr", stat);
 }
-
 EXPORT_SYMBOL_GPL(ide_dma_intr);
 
-static int ide_dma_good_drive(ide_drive_t *drive)
+int ide_dma_good_drive(ide_drive_t *drive)
 {
 	return ide_in_drive_list(drive->id, drive_whitelist);
 }
@@ -139,7 +126,7 @@ static int ide_dma_good_drive(ide_drive_t *drive)
 
 int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 {
-	ide_hwif_t *hwif = HWIF(drive);
+	ide_hwif_t *hwif = drive->hwif;
 	struct scatterlist *sg = hwif->sg_table;
 
 	ide_map_sg(drive, rq);
@@ -152,106 +139,8 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 	return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
 			  hwif->sg_dma_direction);
 }
-
 EXPORT_SYMBOL_GPL(ide_build_sglist);
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
-/**
- *	ide_build_dmatable	-	build IDE DMA table
- *
- *	ide_build_dmatable() prepares a dma request. We map the command
- *	to get the pci bus addresses of the buffers and then build up
- *	the PRD table that the IDE layer wants to be fed. The code
- *	knows about the 64K wrap bug in the CS5530.
- *
- *	Returns the number of built PRD entries if all went okay,
- *	returns 0 otherwise.
- *
- *	May also be invoked from trm290.c
- */
- 
-int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	__le32 *table = (__le32 *)hwif->dmatable_cpu;
-	unsigned int is_trm290	= (hwif->chipset == ide_trm290) ? 1 : 0;
-	unsigned int count = 0;
-	int i;
-	struct scatterlist *sg;
-
-	hwif->sg_nents = i = ide_build_sglist(drive, rq);
-
-	if (!i)
-		return 0;
-
-	sg = hwif->sg_table;
-	while (i) {
-		u32 cur_addr;
-		u32 cur_len;
-
-		cur_addr = sg_dma_address(sg);
-		cur_len = sg_dma_len(sg);
-
-		/*
-		 * Fill in the dma table, without crossing any 64kB boundaries.
-		 * Most hardware requires 16-bit alignment of all blocks,
-		 * but the trm290 requires 32-bit alignment.
-		 */
-
-		while (cur_len) {
-			if (count++ >= PRD_ENTRIES) {
-				printk(KERN_ERR "%s: DMA table too small\n", drive->name);
-				goto use_pio_instead;
-			} else {
-				u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff);
-
-				if (bcount > cur_len)
-					bcount = cur_len;
-				*table++ = cpu_to_le32(cur_addr);
-				xcount = bcount & 0xffff;
-				if (is_trm290)
-					xcount = ((xcount >> 2) - 1) << 16;
-				if (xcount == 0x0000) {
-	/* 
-	 * Most chipsets correctly interpret a length of 0x0000 as 64KB,
-	 * but at least one (e.g. CS5530) misinterprets it as zero (!).
-	 * So here we break the 64KB entry into two 32KB entries instead.
-	 */
-					if (count++ >= PRD_ENTRIES) {
-						printk(KERN_ERR "%s: DMA table too small\n", drive->name);
-						goto use_pio_instead;
-					}
-					*table++ = cpu_to_le32(0x8000);
-					*table++ = cpu_to_le32(cur_addr + 0x8000);
-					xcount = 0x8000;
-				}
-				*table++ = cpu_to_le32(xcount);
-				cur_addr += bcount;
-				cur_len -= bcount;
-			}
-		}
-
-		sg = sg_next(sg);
-		i--;
-	}
-
-	if (count) {
-		if (!is_trm290)
-			*--table |= cpu_to_le32(0x80000000);
-		return count;
-	}
-
-	printk(KERN_ERR "%s: empty DMA table?\n", drive->name);
-
-use_pio_instead:
-	ide_destroy_dmatable(drive);
-
-	return 0; /* revert to PIO for this request */
-}
-
-EXPORT_SYMBOL_GPL(ide_build_dmatable);
-#endif
-
 /**
  *	ide_destroy_dmatable	-	clean up DMA mapping
  *	@drive: The drive to unmap
@@ -262,146 +151,30 @@ EXPORT_SYMBOL_GPL(ide_build_dmatable);
  *	an oops as only one mapping can be live for each target at a given
  *	time.
  */
- 
-void ide_destroy_dmatable (ide_drive_t *drive)
+
+void ide_destroy_dmatable(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 
 	dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
 		     hwif->sg_dma_direction);
 }
-
 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
-/**
- *	config_drive_for_dma	-	attempt to activate IDE DMA
- *	@drive: the drive to place in DMA mode
- *
- *	If the drive supports at least mode 2 DMA or UDMA of any kind
- *	then attempt to place it into DMA mode. Drives that are known to
- *	support DMA but predate the DMA properties or that are known
- *	to have DMA handling bugs are also set up appropriately based
- *	on the good/bad drive lists.
- */
- 
-static int config_drive_for_dma (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	struct hd_driveid *id = drive->id;
-
-	if (drive->media != ide_disk) {
-		if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
-			return 0;
-	}
-
-	/*
-	 * Enable DMA on any drive that has
-	 * UltraDMA (mode 0/1/2/3/4/5/6) enabled
-	 */
-	if ((id->field_valid & 4) && ((id->dma_ultra >> 8) & 0x7f))
-		return 1;
-
-	/*
-	 * Enable DMA on any drive that has mode2 DMA
-	 * (multi or single) enabled
-	 */
-	if (id->field_valid & 2)	/* regular DMA */
-		if ((id->dma_mword & 0x404) == 0x404 ||
-		    (id->dma_1word & 0x404) == 0x404)
-			return 1;
-
-	/* Consult the list of known "good" drives */
-	if (ide_dma_good_drive(drive))
-		return 1;
-
-	return 0;
-}
-
-/**
- *	dma_timer_expiry	-	handle a DMA timeout
- *	@drive: Drive that timed out
- *
- *	An IDE DMA transfer timed out. In the event of an error we ask
- *	the driver to resolve the problem, if a DMA transfer is still
- *	in progress we continue to wait (arguably we need to add a 
- *	secondary 'I don't care what the drive thinks' timeout here)
- *	Finally if we have an interrupt we let it complete the I/O.
- *	But only one time - we clear expiry and if it's still not
- *	completed after WAIT_CMD, we error and retry in PIO.
- *	This can occur if an interrupt is lost or due to hang or bugs.
- */
- 
-static int dma_timer_expiry (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 dma_stat		= hwif->tp_ops->read_sff_dma_status(hwif);
-
-	printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n",
-		drive->name, dma_stat);
-
-	if ((dma_stat & 0x18) == 0x18)	/* BUSY Stupid Early Timer !! */
-		return WAIT_CMD;
-
-	HWGROUP(drive)->expiry = NULL;	/* one free ride for now */
-
-	/* 1 dmaing, 2 error, 4 intr */
-	if (dma_stat & 2)	/* ERROR */
-		return -1;
-
-	if (dma_stat & 1)	/* DMAing */
-		return WAIT_CMD;
-
-	if (dma_stat & 4)	/* Got an Interrupt */
-		return WAIT_CMD;
-
-	return 0;	/* Status is unknown -- reset the bus */
-}
-
-/**
- *	ide_dma_host_set	-	Enable/disable DMA on a host
- *	@drive: drive to control
- *
- *	Enable/disable DMA on an IDE controller following generic
- *	bus-mastering IDE controller behaviour.
- */
-
-void ide_dma_host_set(ide_drive_t *drive, int on)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 unit			= (drive->select.b.unit & 0x01);
-	u8 dma_stat		= hwif->tp_ops->read_sff_dma_status(hwif);
-
-	if (on)
-		dma_stat |= (1 << (5 + unit));
-	else
-		dma_stat &= ~(1 << (5 + unit));
-
-	if (hwif->host_flags & IDE_HFLAG_MMIO)
-		writeb(dma_stat,
-		       (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-	else
-		outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);
-}
-
-EXPORT_SYMBOL_GPL(ide_dma_host_set);
-#endif /* CONFIG_BLK_DEV_IDEDMA_SFF  */
-
 /**
  *	ide_dma_off_quietly	-	Generic DMA kill
  *	@drive: drive to control
  *
- *	Turn off the current DMA on this IDE controller. 
+ *	Turn off the current DMA on this IDE controller.
  */
 
 void ide_dma_off_quietly(ide_drive_t *drive)
 {
-	drive->using_dma = 0;
+	drive->dev_flags &= ~IDE_DFLAG_USING_DMA;
 	ide_toggle_bounce(drive, 0);
 
 	drive->hwif->dma_ops->dma_host_set(drive, 0);
 }
-
 EXPORT_SYMBOL(ide_dma_off_quietly);
 
 /**
@@ -417,7 +190,6 @@ void ide_dma_off(ide_drive_t *drive)
 	printk(KERN_INFO "%s: DMA disabled\n", drive->name);
 	ide_dma_off_quietly(drive);
 }
-
 EXPORT_SYMBOL(ide_dma_off);
 
 /**
@@ -429,179 +201,24 @@ EXPORT_SYMBOL(ide_dma_off);
 
 void ide_dma_on(ide_drive_t *drive)
 {
-	drive->using_dma = 1;
+	drive->dev_flags |= IDE_DFLAG_USING_DMA;
 	ide_toggle_bounce(drive, 1);
 
 	drive->hwif->dma_ops->dma_host_set(drive, 1);
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
-/**
- *	ide_dma_setup	-	begin a DMA phase
- *	@drive: target device
- *
- *	Build an IDE DMA PRD (IDE speak for scatter gather table)
- *	and then set up the DMA transfer registers for a device
- *	that follows generic IDE PCI DMA behaviour. Controllers can
- *	override this function if they need to
- *
- *	Returns 0 on success. If a PIO fallback is required then 1
- *	is returned. 
- */
-
-int ide_dma_setup(ide_drive_t *drive)
+int __ide_dma_bad_drive(ide_drive_t *drive)
 {
-	ide_hwif_t *hwif = drive->hwif;
-	struct request *rq = HWGROUP(drive)->rq;
-	unsigned int reading;
-	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
-	u8 dma_stat;
-
-	if (rq_data_dir(rq))
-		reading = 0;
-	else
-		reading = 1 << 3;
-
-	/* fall back to pio! */
-	if (!ide_build_dmatable(drive, rq)) {
-		ide_map_sg(drive, rq);
-		return 1;
-	}
-
-	/* PRD table */
-	if (hwif->host_flags & IDE_HFLAG_MMIO)
-		writel(hwif->dmatable_dma,
-		       (void __iomem *)(hwif->dma_base + ATA_DMA_TABLE_OFS));
-	else
-		outl(hwif->dmatable_dma, hwif->dma_base + ATA_DMA_TABLE_OFS);
-
-	/* specify r/w */
-	if (mmio)
-		writeb(reading, (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
-	else
-		outb(reading, hwif->dma_base + ATA_DMA_CMD);
-
-	/* read DMA status for INTR & ERROR flags */
-	dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
-
-	/* clear INTR & ERROR flags */
-	if (mmio)
-		writeb(dma_stat | 6,
-		       (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-	else
-		outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
-
-	drive->waiting_for_dma = 1;
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(ide_dma_setup);
-
-void ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
-{
-	/* issue cmd to drive */
-	ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
-}
-EXPORT_SYMBOL_GPL(ide_dma_exec_cmd);
-
-void ide_dma_start(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u8 dma_cmd;
-
-	/* Note that this is done *after* the cmd has
-	 * been issued to the drive, as per the BM-IDE spec.
-	 * The Promise Ultra33 doesn't work correctly when
-	 * we do this part before issuing the drive cmd.
-	 */
-	if (hwif->host_flags & IDE_HFLAG_MMIO) {
-		dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
-		/* start DMA */
-		writeb(dma_cmd | 1,
-		       (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
-	} else {
-		dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
-		outb(dma_cmd | 1, hwif->dma_base + ATA_DMA_CMD);
-	}
-
-	hwif->dma = 1;
-	wmb();
-}
-
-EXPORT_SYMBOL_GPL(ide_dma_start);
-
-/* returns 1 on error, 0 otherwise */
-int __ide_dma_end (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
-	u8 dma_stat = 0, dma_cmd = 0;
-
-	drive->waiting_for_dma = 0;
-
-	if (mmio) {
-		/* get DMA command mode */
-		dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
-		/* stop DMA */
-		writeb(dma_cmd & ~1,
-		       (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
-	} else {
-		dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
-		outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
-	}
-
-	/* get DMA status */
-	dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
-
-	if (mmio)
-		/* clear the INTR & ERROR bits */
-		writeb(dma_stat | 6,
-		       (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-	else
-		outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
-
-	/* purge DMA mappings */
-	ide_destroy_dmatable(drive);
-	/* verify good DMA status */
-	hwif->dma = 0;
-	wmb();
-	return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
-}
-
-EXPORT_SYMBOL(__ide_dma_end);
-
-/* returns 1 if dma irq issued, 0 otherwise */
-int ide_dma_test_irq(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 dma_stat		= hwif->tp_ops->read_sff_dma_status(hwif);
-
-	/* return 1 if INTR asserted */
-	if ((dma_stat & 4) == 4)
-		return 1;
-	if (!drive->waiting_for_dma)
-		printk(KERN_WARNING "%s: (%s) called while not waiting\n",
-			drive->name, __func__);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(ide_dma_test_irq);
-#else
-static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
-#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
-
-int __ide_dma_bad_drive (ide_drive_t *drive)
-{
-	struct hd_driveid *id = drive->id;
+	u16 *id = drive->id;
 
 	int blacklist = ide_in_drive_list(id, drive_blacklist);
 	if (blacklist) {
 		printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n",
-				    drive->name, id->model);
+				    drive->name, (char *)&id[ATA_ID_PROD]);
 		return blacklist;
 	}
 	return 0;
 }
-
 EXPORT_SYMBOL(__ide_dma_bad_drive);
 
 static const u8 xfer_mode_bases[] = {
@@ -612,21 +229,21 @@ static const u8 xfer_mode_bases[] = {
 
 static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
 {
-	struct hd_driveid *id = drive->id;
+	u16 *id = drive->id;
 	ide_hwif_t *hwif = drive->hwif;
 	const struct ide_port_ops *port_ops = hwif->port_ops;
 	unsigned int mask = 0;
 
-	switch(base) {
+	switch (base) {
 	case XFER_UDMA_0:
-		if ((id->field_valid & 4) == 0)
+		if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
 			break;
 
 		if (port_ops && port_ops->udma_filter)
 			mask = port_ops->udma_filter(drive);
 		else
 			mask = hwif->ultra_mask;
-		mask &= id->dma_ultra;
+		mask &= id[ATA_ID_UDMA_MODES];
 
 		/*
 		 * avoid false cable warning from eighty_ninty_three()
@@ -637,19 +254,19 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
 		}
 		break;
 	case XFER_MW_DMA_0:
-		if ((id->field_valid & 2) == 0)
+		if ((id[ATA_ID_FIELD_VALID] & 2) == 0)
 			break;
 		if (port_ops && port_ops->mdma_filter)
 			mask = port_ops->mdma_filter(drive);
 		else
 			mask = hwif->mwdma_mask;
-		mask &= id->dma_mword;
+		mask &= id[ATA_ID_MWDMA_MODES];
 		break;
 	case XFER_SW_DMA_0:
-		if (id->field_valid & 2) {
-			mask = id->dma_1word & hwif->swdma_mask;
-		} else if (id->tDMA) {
-			u8 mode = id->tDMA;
+		if (id[ATA_ID_FIELD_VALID] & 2) {
+			mask = id[ATA_ID_SWDMA_MODES] & hwif->swdma_mask;
+		} else if (id[ATA_ID_OLD_DMA_MODES] >> 8) {
+			u8 mode = id[ATA_ID_OLD_DMA_MODES] >> 8;
 
 			/*
 			 * if the mode is valid convert it to the mask
@@ -706,7 +323,8 @@ u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
 		/*
 		 * is this correct?
 		 */
-		if (ide_dma_good_drive(drive) && drive->id->eide_dma_time < 150)
+		if (ide_dma_good_drive(drive) &&
+		    drive->id[ATA_ID_EIDE_DMA_TIME] < 150)
 			mode = XFER_MW_DMA_1;
 	}
 
@@ -717,7 +335,6 @@ u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
 
 	return mode;
 }
-
 EXPORT_SYMBOL_GPL(ide_find_dma_mode);
 
 static int ide_tune_dma(ide_drive_t *drive)
@@ -725,7 +342,8 @@ static int ide_tune_dma(ide_drive_t *drive)
 	ide_hwif_t *hwif = drive->hwif;
 	u8 speed;
 
-	if (drive->nodma || (drive->id->capability & 1) == 0)
+	if (ata_id_has_dma(drive->id) == 0 ||
+	    (drive->dev_flags & IDE_DFLAG_NODMA))
 		return 0;
 
 	/* consult the list of known "bad" drives */
@@ -767,13 +385,15 @@ static int ide_dma_check(ide_drive_t *drive)
 
 int ide_id_dma_bug(ide_drive_t *drive)
 {
-	struct hd_driveid *id = drive->id;
+	u16 *id = drive->id;
 
-	if (id->field_valid & 4) {
-		if ((id->dma_ultra >> 8) && (id->dma_mword >> 8))
+	if (id[ATA_ID_FIELD_VALID] & 4) {
+		if ((id[ATA_ID_UDMA_MODES] >> 8) &&
+		    (id[ATA_ID_MWDMA_MODES] >> 8))
 			goto err_out;
-	} else if (id->field_valid & 2) {
-		if ((id->dma_mword >> 8) && (id->dma_1word >> 8))
+	} else if (id[ATA_ID_FIELD_VALID] & 2) {
+		if ((id[ATA_ID_MWDMA_MODES] >> 8) &&
+		    (id[ATA_ID_SWDMA_MODES] >> 8))
 			goto err_out;
 	}
 	return 0;
@@ -823,66 +443,59 @@ void ide_check_dma_crc(ide_drive_t *drive)
 		ide_dma_on(drive);
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
-void ide_dma_lost_irq (ide_drive_t *drive)
+void ide_dma_lost_irq(ide_drive_t *drive)
 {
-	printk("%s: DMA interrupt recovery\n", drive->name);
+	printk(KERN_ERR "%s: DMA interrupt recovery\n", drive->name);
 }
+EXPORT_SYMBOL_GPL(ide_dma_lost_irq);
 
-EXPORT_SYMBOL(ide_dma_lost_irq);
-
-void ide_dma_timeout (ide_drive_t *drive)
+void ide_dma_timeout(ide_drive_t *drive)
 {
-	ide_hwif_t *hwif = HWIF(drive);
+	ide_hwif_t *hwif = drive->hwif;
 
 	printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
 
 	if (hwif->dma_ops->dma_test_irq(drive))
 		return;
 
+	ide_dump_status(drive, "DMA timeout", hwif->tp_ops->read_status(hwif));
+
 	hwif->dma_ops->dma_end(drive);
 }
-
-EXPORT_SYMBOL(ide_dma_timeout);
+EXPORT_SYMBOL_GPL(ide_dma_timeout);
 
 void ide_release_dma_engine(ide_hwif_t *hwif)
 {
 	if (hwif->dmatable_cpu) {
-		struct pci_dev *pdev = to_pci_dev(hwif->dev);
+		int prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
 
-		pci_free_consistent(pdev, PRD_ENTRIES * PRD_BYTES,
-				    hwif->dmatable_cpu, hwif->dmatable_dma);
+		dma_free_coherent(hwif->dev, prd_size,
+				  hwif->dmatable_cpu, hwif->dmatable_dma);
 		hwif->dmatable_cpu = NULL;
 	}
 }
+EXPORT_SYMBOL_GPL(ide_release_dma_engine);
 
 int ide_allocate_dma_engine(ide_hwif_t *hwif)
 {
-	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	int prd_size;
 
-	hwif->dmatable_cpu = pci_alloc_consistent(pdev,
-						  PRD_ENTRIES * PRD_BYTES,
-						  &hwif->dmatable_dma);
+	if (hwif->prd_max_nents == 0)
+		hwif->prd_max_nents = PRD_ENTRIES;
+	if (hwif->prd_ent_size == 0)
+		hwif->prd_ent_size = PRD_BYTES;
 
-	if (hwif->dmatable_cpu)
-		return 0;
+	prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
 
-	printk(KERN_ERR "%s: -- Error, unable to allocate DMA table.\n",
+	hwif->dmatable_cpu = dma_alloc_coherent(hwif->dev, prd_size,
+						&hwif->dmatable_dma,
+						GFP_ATOMIC);
+	if (hwif->dmatable_cpu == NULL) {
+		printk(KERN_ERR "%s: unable to allocate PRD table\n",
 			hwif->name);
+		return -ENOMEM;
+	}
 
-	return 1;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
-
-const struct ide_dma_ops sff_dma_ops = {
-	.dma_host_set		= ide_dma_host_set,
-	.dma_setup		= ide_dma_setup,
-	.dma_exec_cmd		= ide_dma_exec_cmd,
-	.dma_start		= ide_dma_start,
-	.dma_end		= __ide_dma_end,
-	.dma_test_irq		= ide_dma_test_irq,
-	.dma_timeout		= ide_dma_timeout,
-	.dma_lost_irq		= ide_dma_lost_irq,
-};
-EXPORT_SYMBOL_GPL(sff_dma_ops);
-#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */