ide: remove the legacy ide driver

The legay ide driver has been replace with libata starting in 2003 and has
been scheduled for removal for a while.  Finally kill it off so that we
can start cleaning up various bits of cruft it forced on the block layer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 551 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
deleted file mode 100644
index 6f344654ef22..000000000000
--- a/drivers/ide/ide-dma.c
+++ /dev/null
@@ -1,551 +0,0 @@
-/*
- *  IDE DMA support (including IDE PCI BM-DMA).
- *
- *  Copyright (C) 1995-1998   Mark Lord
- *  Copyright (C) 1999-2000   Andre Hedrick <andre@linux-ide.org>
- *  Copyright (C) 2004, 2007  Bartlomiej Zolnierkiewicz
- *
- *  May be copied or modified under the terms of the GNU General Public License
- *
- *  DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
- */
-
-/*
- *  Special Thanks to Mark for his Six years of work.
- */
-
-/*
- * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
- * fixing the problem with the BIOS on some Acer motherboards.
- *
- * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing
- * "TX" chipset compatibility and for providing patches for the "TX" chipset.
- *
- * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack
- * at generic DMA -- his patches were referred to when preparing this code.
- *
- * Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
- * for supplying a Promise UDMA board & WD UDMA drive for this work!
- */
-
-#include <linux/types.h>
-#include <linux/gfp.h>
-#include <linux/kernel.h>
-#include <linux/export.h>
-#include <linux/ide.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
-
-static const struct drive_list_entry drive_whitelist[] = {
-	{ "Micropolis 2112A"	,       NULL		},
-	{ "CONNER CTMA 4000"	,       NULL		},
-	{ "CONNER CTT8000-A"	,       NULL		},
-	{ "ST34342A"		,	NULL		},
-	{ NULL			,	NULL		}
-};
-
-static const struct drive_list_entry drive_blacklist[] = {
-	{ "WDC AC11000H"	,	NULL 		},
-	{ "WDC AC22100H"	,	NULL 		},
-	{ "WDC AC32500H"	,	NULL 		},
-	{ "WDC AC33100H"	,	NULL 		},
-	{ "WDC AC31600H"	,	NULL 		},
-	{ "WDC AC32100H"	,	"24.09P07"	},
-	{ "WDC AC23200L"	,	"21.10N21"	},
-	{ "Compaq CRD-8241B"	,	NULL 		},
-	{ "CRD-8400B"		,	NULL 		},
-	{ "CRD-8480B",			NULL 		},
-	{ "CRD-8482B",			NULL 		},
-	{ "CRD-84"		,	NULL 		},
-	{ "SanDisk SDP3B"	,	NULL 		},
-	{ "SanDisk SDP3B-64"	,	NULL 		},
-	{ "SANYO CD-ROM CRD"	,	NULL 		},
-	{ "HITACHI CDR-8"	,	NULL 		},
-	{ "HITACHI CDR-8335"	,	NULL 		},
-	{ "HITACHI CDR-8435"	,	NULL 		},
-	{ "Toshiba CD-ROM XM-6202B"	,	NULL 		},
-	{ "TOSHIBA CD-ROM XM-1702BC",	NULL 		},
-	{ "CD-532E-A"		,	NULL 		},
-	{ "E-IDE CD-ROM CR-840",	NULL 		},
-	{ "CD-ROM Drive/F5A",	NULL 		},
-	{ "WPI CDD-820",		NULL 		},
-	{ "SAMSUNG CD-ROM SC-148C",	NULL 		},
-	{ "SAMSUNG CD-ROM SC",	NULL 		},
-	{ "ATAPI CD-ROM DRIVE 40X MAXIMUM",	NULL 		},
-	{ "_NEC DV5800A",               NULL            },
-	{ "SAMSUNG CD-ROM SN-124",	"N001" },
-	{ "Seagate STT20000A",		NULL  },
-	{ "CD-ROM CDR_U200",		"1.09" },
-	{ NULL			,	NULL		}
-
-};
-
-/**
- *	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
- *	IDE device
- */
-
-ide_startstop_t ide_dma_intr(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	struct ide_cmd *cmd = &hwif->cmd;
-	u8 stat = 0, dma_stat = 0;
-
-	drive->waiting_for_dma = 0;
-	dma_stat = hwif->dma_ops->dma_end(drive);
-	ide_dma_unmap_sg(drive, cmd);
-	stat = hwif->tp_ops->read_status(hwif);
-
-	if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
-		if (!dma_stat) {
-			if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
-				ide_finish_cmd(drive, cmd, stat);
-			else
-				ide_complete_rq(drive, BLK_STS_OK,
-						blk_rq_sectors(cmd->rq) << 9);
-			return ide_stopped;
-		}
-		printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
-			drive->name, __func__, dma_stat);
-	}
-	return ide_error(drive, "dma_intr", stat);
-}
-
-int ide_dma_good_drive(ide_drive_t *drive)
-{
-	return ide_in_drive_list(drive->id, drive_whitelist);
-}
-
-/**
- *	ide_dma_map_sg	-	map IDE scatter gather for DMA I/O
- *	@drive: the drive to map the DMA table for
- *	@cmd: command
- *
- *	Perform the DMA mapping magic necessary to access the source or
- *	target buffers of a request via DMA.  The lower layers of the
- *	kernel provide the necessary cache management so that we can
- *	operate in a portable fashion.
- */
-
-static int ide_dma_map_sg(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	struct scatterlist *sg = hwif->sg_table;
-	int i;
-
-	if (cmd->tf_flags & IDE_TFLAG_WRITE)
-		cmd->sg_dma_direction = DMA_TO_DEVICE;
-	else
-		cmd->sg_dma_direction = DMA_FROM_DEVICE;
-
-	i = dma_map_sg(hwif->dev, sg, cmd->sg_nents, cmd->sg_dma_direction);
-	if (i) {
-		cmd->orig_sg_nents = cmd->sg_nents;
-		cmd->sg_nents = i;
-	}
-
-	return i;
-}
-
-/**
- *	ide_dma_unmap_sg	-	clean up DMA mapping
- *	@drive: The drive to unmap
- *
- *	Teardown mappings after DMA has completed. This must be called
- *	after the completion of each use of ide_build_dmatable and before
- *	the next use of ide_build_dmatable. Failure to do so will cause
- *	an oops as only one mapping can be live for each target at a given
- *	time.
- */
-
-void ide_dma_unmap_sg(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	ide_hwif_t *hwif = drive->hwif;
-
-	dma_unmap_sg(hwif->dev, hwif->sg_table, cmd->orig_sg_nents,
-		     cmd->sg_dma_direction);
-}
-EXPORT_SYMBOL_GPL(ide_dma_unmap_sg);
-
-/**
- *	ide_dma_off_quietly	-	Generic DMA kill
- *	@drive: drive to control
- *
- *	Turn off the current DMA on this IDE controller.
- */
-
-void ide_dma_off_quietly(ide_drive_t *drive)
-{
-	drive->dev_flags &= ~IDE_DFLAG_USING_DMA;
-
-	drive->hwif->dma_ops->dma_host_set(drive, 0);
-}
-EXPORT_SYMBOL(ide_dma_off_quietly);
-
-/**
- *	ide_dma_off	-	disable DMA on a device
- *	@drive: drive to disable DMA on
- *
- *	Disable IDE DMA for a device on this IDE controller.
- *	Inform the user that DMA has been disabled.
- */
-
-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);
-
-/**
- *	ide_dma_on		-	Enable DMA on a device
- *	@drive: drive to enable DMA on
- *
- *	Enable IDE DMA for a device on this IDE controller.
- */
-
-void ide_dma_on(ide_drive_t *drive)
-{
-	drive->dev_flags |= IDE_DFLAG_USING_DMA;
-
-	drive->hwif->dma_ops->dma_host_set(drive, 1);
-}
-
-int __ide_dma_bad_drive(ide_drive_t *drive)
-{
-	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, (char *)&id[ATA_ID_PROD]);
-		return blacklist;
-	}
-	return 0;
-}
-EXPORT_SYMBOL(__ide_dma_bad_drive);
-
-static const u8 xfer_mode_bases[] = {
-	XFER_UDMA_0,
-	XFER_MW_DMA_0,
-	XFER_SW_DMA_0,
-};
-
-static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
-{
-	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) {
-	case XFER_UDMA_0:
-		if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
-			break;
-		mask = id[ATA_ID_UDMA_MODES];
-		if (port_ops && port_ops->udma_filter)
-			mask &= port_ops->udma_filter(drive);
-		else
-			mask &= hwif->ultra_mask;
-
-		/*
-		 * avoid false cable warning from eighty_ninty_three()
-		 */
-		if (req_mode > XFER_UDMA_2) {
-			if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
-				mask &= 0x07;
-		}
-		break;
-	case XFER_MW_DMA_0:
-		mask = id[ATA_ID_MWDMA_MODES];
-
-		/* Also look for the CF specific MWDMA modes... */
-		if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 0x38)) {
-			u8 mode = ((id[ATA_ID_CFA_MODES] & 0x38) >> 3) - 1;
-
-			mask |= ((2 << mode) - 1) << 3;
-		}
-
-		if (port_ops && port_ops->mdma_filter)
-			mask &= port_ops->mdma_filter(drive);
-		else
-			mask &= hwif->mwdma_mask;
-		break;
-	case XFER_SW_DMA_0:
-		mask = id[ATA_ID_SWDMA_MODES];
-		if (!(mask & ATA_SWDMA2) && (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
-			 * (the maximum allowed mode is XFER_SW_DMA_2)
-			 */
-			if (mode <= 2)
-				mask = (2 << mode) - 1;
-		}
-		mask &= hwif->swdma_mask;
-		break;
-	default:
-		BUG();
-		break;
-	}
-
-	return mask;
-}
-
-/**
- *	ide_find_dma_mode	-	compute DMA speed
- *	@drive: IDE device
- *	@req_mode: requested mode
- *
- *	Checks the drive/host capabilities and finds the speed to use for
- *	the DMA transfer.  The speed is then limited by the requested mode.
- *
- *	Returns 0 if the drive/host combination is incapable of DMA transfers
- *	or if the requested mode is not a DMA mode.
- */
-
-u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	unsigned int mask;
-	int x, i;
-	u8 mode = 0;
-
-	if (drive->media != ide_disk) {
-		if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
-			return 0;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) {
-		if (req_mode < xfer_mode_bases[i])
-			continue;
-		mask = ide_get_mode_mask(drive, xfer_mode_bases[i], req_mode);
-		x = fls(mask) - 1;
-		if (x >= 0) {
-			mode = xfer_mode_bases[i] + x;
-			break;
-		}
-	}
-
-	if (hwif->chipset == ide_acorn && mode == 0) {
-		/*
-		 * is this correct?
-		 */
-		if (ide_dma_good_drive(drive) &&
-		    drive->id[ATA_ID_EIDE_DMA_TIME] < 150)
-			mode = XFER_MW_DMA_1;
-	}
-
-	mode = min(mode, req_mode);
-
-	printk(KERN_INFO "%s: %s mode selected\n", drive->name,
-			  mode ? ide_xfer_verbose(mode) : "no DMA");
-
-	return mode;
-}
-
-static int ide_tune_dma(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	u8 speed;
-
-	if (ata_id_has_dma(drive->id) == 0 ||
-	    (drive->dev_flags & IDE_DFLAG_NODMA))
-		return 0;
-
-	/* consult the list of known "bad" drives */
-	if (__ide_dma_bad_drive(drive))
-		return 0;
-
-	if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
-		return config_drive_for_dma(drive);
-
-	speed = ide_max_dma_mode(drive);
-
-	if (!speed)
-		return 0;
-
-	if (ide_set_dma_mode(drive, speed))
-		return 0;
-
-	return 1;
-}
-
-static int ide_dma_check(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = drive->hwif;
-
-	if (ide_tune_dma(drive))
-		return 0;
-
-	/* TODO: always do PIO fallback */
-	if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
-		return -1;
-
-	ide_set_max_pio(drive);
-
-	return -1;
-}
-
-int ide_set_dma(ide_drive_t *drive)
-{
-	int rc;
-
-	/*
-	 * Force DMAing for the beginning of the check.
-	 * Some chipsets appear to do interesting
-	 * things, if not checked and cleared.
-	 *   PARANOIA!!!
-	 */
-	ide_dma_off_quietly(drive);
-
-	rc = ide_dma_check(drive);
-	if (rc)
-		return rc;
-
-	ide_dma_on(drive);
-
-	return 0;
-}
-
-void ide_check_dma_crc(ide_drive_t *drive)
-{
-	u8 mode;
-
-	ide_dma_off_quietly(drive);
-	drive->crc_count = 0;
-	mode = drive->current_speed;
-	/*
-	 * Don't try non Ultra-DMA modes without iCRC's.  Force the
-	 * device to PIO and make the user enable SWDMA/MWDMA modes.
-	 */
-	if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
-		mode--;
-	else
-		mode = XFER_PIO_4;
-	ide_set_xfer_rate(drive, mode);
-	if (drive->current_speed >= XFER_SW_DMA_0)
-		ide_dma_on(drive);
-}
-
-void ide_dma_lost_irq(ide_drive_t *drive)
-{
-	printk(KERN_ERR "%s: DMA interrupt recovery\n", drive->name);
-}
-EXPORT_SYMBOL_GPL(ide_dma_lost_irq);
-
-/*
- * un-busy the port etc, and clear any pending DMA status. we want to
- * retry the current request in pio mode instead of risking tossing it
- * all away
- */
-ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
-{
-	ide_hwif_t *hwif = drive->hwif;
-	const struct ide_dma_ops *dma_ops = hwif->dma_ops;
-	struct ide_cmd *cmd = &hwif->cmd;
-	ide_startstop_t ret = ide_stopped;
-
-	/*
-	 * end current dma transaction
-	 */
-
-	if (error < 0) {
-		printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
-		drive->waiting_for_dma = 0;
-		(void)dma_ops->dma_end(drive);
-		ide_dma_unmap_sg(drive, cmd);
-		ret = ide_error(drive, "dma timeout error",
-				hwif->tp_ops->read_status(hwif));
-	} else {
-		printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
-		if (dma_ops->dma_clear)
-			dma_ops->dma_clear(drive);
-		printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
-		if (dma_ops->dma_test_irq(drive) == 0) {
-			ide_dump_status(drive, "DMA timeout",
-					hwif->tp_ops->read_status(hwif));
-			drive->waiting_for_dma = 0;
-			(void)dma_ops->dma_end(drive);
-			ide_dma_unmap_sg(drive, cmd);
-		}
-	}
-
-	/*
-	 * disable dma for now, but remember that we did so because of
-	 * a timeout -- we'll reenable after we finish this next request
-	 * (or rather the first chunk of it) in pio.
-	 */
-	drive->dev_flags |= IDE_DFLAG_DMA_PIO_RETRY;
-	drive->retry_pio++;
-	ide_dma_off_quietly(drive);
-
-	/*
-	 * make sure request is sane
-	 */
-	if (hwif->rq)
-		scsi_req(hwif->rq)->result = 0;
-	return ret;
-}
-
-void ide_release_dma_engine(ide_hwif_t *hwif)
-{
-	if (hwif->dmatable_cpu) {
-		int prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
-
-		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)
-{
-	int prd_size;
-
-	if (hwif->prd_max_nents == 0)
-		hwif->prd_max_nents = PRD_ENTRIES;
-	if (hwif->prd_ent_size == 0)
-		hwif->prd_ent_size = PRD_BYTES;
-
-	prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
-
-	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 0;
-}
-EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
-
-int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
-{
-	const struct ide_dma_ops *dma_ops = drive->hwif->dma_ops;
-
-	if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
-	    (dma_ops->dma_check && dma_ops->dma_check(drive, cmd)))
-		goto out;
-	ide_map_sg(drive, cmd);
-	if (ide_dma_map_sg(drive, cmd) == 0)
-		goto out_map;
-	if (dma_ops->dma_setup(drive, cmd))
-		goto out_dma_unmap;
-	drive->waiting_for_dma = 1;
-	return 0;
-out_dma_unmap:
-	ide_dma_unmap_sg(drive, cmd);
-out_map:
-	ide_map_sg(drive, cmd);
-out:
-	return 1;
-}