1 files changed, 797 insertions, 0 deletions

diff --git a/kernel/drivers/ide/ide-disk.c b/kernel/drivers/ide/ide-disk.c
new file mode 100644
index 000000000..56b970889
--- /dev/null
+++ b/kernel/drivers/ide/ide-disk.c
@@ -0,0 +1,797 @@
+/*
+ *  Copyright (C) 1994-1998	   Linus Torvalds & authors (see below)
+ *  Copyright (C) 1998-2002	   Linux ATA Development
+ *				      Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2003		   Red Hat
+ *  Copyright (C) 2003-2005, 2007  Bartlomiej Zolnierkiewicz
+ */
+
+/*
+ *  Mostly written by Mark Lord <mlord@pobox.com>
+ *                and Gadi Oxman <gadio@netvision.net.il>
+ *                and Andre Hedrick <andre@linux-ide.org>
+ *
+ * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
+ */
+
+#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/slab.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/leds.h>
+#include <linux/ide.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/div64.h>
+
+#include "ide-disk.h"
+
+static const u8 ide_rw_cmds[] = {
+	ATA_CMD_READ_MULTI,
+	ATA_CMD_WRITE_MULTI,
+	ATA_CMD_READ_MULTI_EXT,
+	ATA_CMD_WRITE_MULTI_EXT,
+	ATA_CMD_PIO_READ,
+	ATA_CMD_PIO_WRITE,
+	ATA_CMD_PIO_READ_EXT,
+	ATA_CMD_PIO_WRITE_EXT,
+	ATA_CMD_READ,
+	ATA_CMD_WRITE,
+	ATA_CMD_READ_EXT,
+	ATA_CMD_WRITE_EXT,
+};
+
+static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
+{
+	u8 index, lba48, write;
+
+	lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
+	write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
+
+	if (dma) {
+		cmd->protocol = ATA_PROT_DMA;
+		index = 8;
+	} else {
+		cmd->protocol = ATA_PROT_PIO;
+		if (drive->mult_count) {
+			cmd->tf_flags |= IDE_TFLAG_MULTI_PIO;
+			index = 0;
+		} else
+			index = 4;
+	}
+
+	cmd->tf.command = ide_rw_cmds[index + lba48 + write];
+}
+
+/*
+ * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
+ * using LBA if supported, or CHS otherwise, to address sectors.
+ */
+static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
+					sector_t block)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	u16 nsectors		= (u16)blk_rq_sectors(rq);
+	u8 lba48		= !!(drive->dev_flags & IDE_DFLAG_LBA48);
+	u8 dma			= !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+	struct ide_cmd		cmd;
+	struct ide_taskfile	*tf = &cmd.tf;
+	ide_startstop_t		rc;
+
+	if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
+		if (block + blk_rq_sectors(rq) > 1ULL << 28)
+			dma = 0;
+		else
+			lba48 = 0;
+	}
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	if (drive->dev_flags & IDE_DFLAG_LBA) {
+		if (lba48) {
+			pr_debug("%s: LBA=0x%012llx\n", drive->name,
+					(unsigned long long)block);
+
+			tf->nsect  = nsectors & 0xff;
+			tf->lbal   = (u8) block;
+			tf->lbam   = (u8)(block >>  8);
+			tf->lbah   = (u8)(block >> 16);
+			tf->device = ATA_LBA;
+
+			tf = &cmd.hob;
+			tf->nsect = (nsectors >> 8) & 0xff;
+			tf->lbal  = (u8)(block >> 24);
+			if (sizeof(block) != 4) {
+				tf->lbam = (u8)((u64)block >> 32);
+				tf->lbah = (u8)((u64)block >> 40);
+			}
+
+			cmd.valid.out.hob = IDE_VALID_OUT_HOB;
+			cmd.valid.in.hob  = IDE_VALID_IN_HOB;
+			cmd.tf_flags |= IDE_TFLAG_LBA48;
+		} else {
+			tf->nsect  = nsectors & 0xff;
+			tf->lbal   = block;
+			tf->lbam   = block >>= 8;
+			tf->lbah   = block >>= 8;
+			tf->device = ((block >> 8) & 0xf) | ATA_LBA;
+		}
+	} else {
+		unsigned int sect, head, cyl, track;
+
+		track = (int)block / drive->sect;
+		sect  = (int)block % drive->sect + 1;
+		head  = track % drive->head;
+		cyl   = track / drive->head;
+
+		pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
+
+		tf->nsect  = nsectors & 0xff;
+		tf->lbal   = sect;
+		tf->lbam   = cyl;
+		tf->lbah   = cyl >> 8;
+		tf->device = head;
+	}
+
+	cmd.tf_flags |= IDE_TFLAG_FS;
+
+	if (rq_data_dir(rq))
+		cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+	ide_tf_set_cmd(drive, &cmd, dma);
+	cmd.rq = rq;
+
+	if (dma == 0) {
+		ide_init_sg_cmd(&cmd, nsectors << 9);
+		ide_map_sg(drive, &cmd);
+	}
+
+	rc = do_rw_taskfile(drive, &cmd);
+
+	if (rc == ide_stopped && dma) {
+		/* fallback to PIO */
+		cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
+		ide_tf_set_cmd(drive, &cmd, 0);
+		ide_init_sg_cmd(&cmd, nsectors << 9);
+		rc = do_rw_taskfile(drive, &cmd);
+	}
+
+	return rc;
+}
+
+/*
+ * 268435455  == 137439 MB or 28bit limit
+ * 320173056  == 163929 MB or 48bit addressing
+ * 1073741822 == 549756 MB or 48bit addressing fake drive
+ */
+
+static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
+				      sector_t block)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
+	BUG_ON(rq->cmd_type != REQ_TYPE_FS);
+
+	ledtrig_ide_activity();
+
+	pr_debug("%s: %sing: block=%llu, sectors=%u\n",
+		 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
+		 (unsigned long long)block, blk_rq_sectors(rq));
+
+	if (hwif->rw_disk)
+		hwif->rw_disk(drive, rq);
+
+	return __ide_do_rw_disk(drive, rq, block);
+}
+
+/*
+ * Queries for true maximum capacity of the drive.
+ * Returns maximum LBA address (> 0) of the drive, 0 if failed.
+ */
+static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+	u64 addr = 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+	if (lba48)
+		tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
+	else
+		tf->command = ATA_CMD_READ_NATIVE_MAX;
+	tf->device  = ATA_LBA;
+
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	if (lba48) {
+		cmd.valid.out.hob = IDE_VALID_OUT_HOB;
+		cmd.valid.in.hob  = IDE_VALID_IN_HOB;
+		cmd.tf_flags = IDE_TFLAG_LBA48;
+	}
+
+	ide_no_data_taskfile(drive, &cmd);
+
+	/* if OK, compute maximum address value */
+	if (!(tf->status & ATA_ERR))
+		addr = ide_get_lba_addr(&cmd, lba48) + 1;
+
+	return addr;
+}
+
+/*
+ * Sets maximum virtual LBA address of the drive.
+ * Returns new maximum virtual LBA address (> 0) or 0 on failure.
+ */
+static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+	u64 addr_set = 0;
+
+	addr_req--;
+
+	memset(&cmd, 0, sizeof(cmd));
+	tf->lbal     = (addr_req >>  0) & 0xff;
+	tf->lbam     = (addr_req >>= 8) & 0xff;
+	tf->lbah     = (addr_req >>= 8) & 0xff;
+	if (lba48) {
+		cmd.hob.lbal = (addr_req >>= 8) & 0xff;
+		cmd.hob.lbam = (addr_req >>= 8) & 0xff;
+		cmd.hob.lbah = (addr_req >>= 8) & 0xff;
+		tf->command  = ATA_CMD_SET_MAX_EXT;
+	} else {
+		tf->device   = (addr_req >>= 8) & 0x0f;
+		tf->command  = ATA_CMD_SET_MAX;
+	}
+	tf->device |= ATA_LBA;
+
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	if (lba48) {
+		cmd.valid.out.hob = IDE_VALID_OUT_HOB;
+		cmd.valid.in.hob  = IDE_VALID_IN_HOB;
+		cmd.tf_flags = IDE_TFLAG_LBA48;
+	}
+
+	ide_no_data_taskfile(drive, &cmd);
+
+	/* if OK, compute maximum address value */
+	if (!(tf->status & ATA_ERR))
+		addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
+
+	return addr_set;
+}
+
+static unsigned long long sectors_to_MB(unsigned long long n)
+{
+	n <<= 9;		/* make it bytes */
+	do_div(n, 1000000);	/* make it MB */
+	return n;
+}
+
+/*
+ * Some disks report total number of sectors instead of
+ * maximum sector address.  We list them here.
+ */
+static const struct drive_list_entry hpa_list[] = {
+	{ "ST340823A",	NULL },
+	{ "ST320413A",	NULL },
+	{ "ST310211A",	NULL },
+	{ NULL,		NULL }
+};
+
+static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
+{
+	u64 capacity, set_max;
+
+	capacity = drive->capacity64;
+	set_max  = idedisk_read_native_max_address(drive, lba48);
+
+	if (ide_in_drive_list(drive->id, hpa_list)) {
+		/*
+		 * Since we are inclusive wrt to firmware revisions do this
+		 * extra check and apply the workaround only when needed.
+		 */
+		if (set_max == capacity + 1)
+			set_max--;
+	}
+
+	return set_max;
+}
+
+static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
+{
+	set_max = idedisk_set_max_address(drive, set_max, lba48);
+	if (set_max)
+		drive->capacity64 = set_max;
+
+	return set_max;
+}
+
+static void idedisk_check_hpa(ide_drive_t *drive)
+{
+	u64 capacity, set_max;
+	int lba48 = ata_id_lba48_enabled(drive->id);
+
+	capacity = drive->capacity64;
+	set_max  = ide_disk_hpa_get_native_capacity(drive, lba48);
+
+	if (set_max <= capacity)
+		return;
+
+	drive->probed_capacity = set_max;
+
+	printk(KERN_INFO "%s: Host Protected Area detected.\n"
+			 "\tcurrent capacity is %llu sectors (%llu MB)\n"
+			 "\tnative  capacity is %llu sectors (%llu MB)\n",
+			 drive->name,
+			 capacity, sectors_to_MB(capacity),
+			 set_max, sectors_to_MB(set_max));
+
+	if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
+		return;
+
+	set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
+	if (set_max)
+		printk(KERN_INFO "%s: Host Protected Area disabled.\n",
+				 drive->name);
+}
+
+static int ide_disk_get_capacity(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	int lba;
+
+	if (ata_id_lba48_enabled(id)) {
+		/* drive speaks 48-bit LBA */
+		lba = 1;
+		drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
+	} else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
+		/* drive speaks 28-bit LBA */
+		lba = 1;
+		drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
+	} else {
+		/* drive speaks boring old 28-bit CHS */
+		lba = 0;
+		drive->capacity64 = drive->cyl * drive->head * drive->sect;
+	}
+
+	drive->probed_capacity = drive->capacity64;
+
+	if (lba) {
+		drive->dev_flags |= IDE_DFLAG_LBA;
+
+		/*
+		* If this device supports the Host Protected Area feature set,
+		* then we may need to change our opinion about its capacity.
+		*/
+		if (ata_id_hpa_enabled(id))
+			idedisk_check_hpa(drive);
+	}
+
+	/* limit drive capacity to 137GB if LBA48 cannot be used */
+	if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
+	    drive->capacity64 > 1ULL << 28) {
+		printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
+		       "%llu sectors (%llu MB)\n",
+		       drive->name, (unsigned long long)drive->capacity64,
+		       sectors_to_MB(drive->capacity64));
+		drive->probed_capacity = drive->capacity64 = 1ULL << 28;
+	}
+
+	if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
+	    (drive->dev_flags & IDE_DFLAG_LBA48)) {
+		if (drive->capacity64 > 1ULL << 28) {
+			printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
+					 " will be used for accessing sectors "
+					 "> %u\n", drive->name, 1 << 28);
+		} else
+			drive->dev_flags &= ~IDE_DFLAG_LBA48;
+	}
+
+	return 0;
+}
+
+static void ide_disk_unlock_native_capacity(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	int lba48 = ata_id_lba48_enabled(id);
+
+	if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
+	    ata_id_hpa_enabled(id) == 0)
+		return;
+
+	/*
+	 * according to the spec the SET MAX ADDRESS command shall be
+	 * immediately preceded by a READ NATIVE MAX ADDRESS command
+	 */
+	if (!ide_disk_hpa_get_native_capacity(drive, lba48))
+		return;
+
+	if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48))
+		drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */
+}
+
+static int idedisk_prep_fn(struct request_queue *q, struct request *rq)
+{
+	ide_drive_t *drive = q->queuedata;
+	struct ide_cmd *cmd;
+
+	if (!(rq->cmd_flags & REQ_FLUSH))
+		return BLKPREP_OK;
+
+	if (rq->special) {
+		cmd = rq->special;
+		memset(cmd, 0, sizeof(*cmd));
+	} else {
+		cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
+	}
+
+	/* FIXME: map struct ide_taskfile on rq->cmd[] */
+	BUG_ON(cmd == NULL);
+
+	if (ata_id_flush_ext_enabled(drive->id) &&
+	    (drive->capacity64 >= (1UL << 28)))
+		cmd->tf.command = ATA_CMD_FLUSH_EXT;
+	else
+		cmd->tf.command = ATA_CMD_FLUSH;
+	cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd->tf_flags = IDE_TFLAG_DYN;
+	cmd->protocol = ATA_PROT_NODATA;
+
+	rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
+	rq->special = cmd;
+	cmd->rq = rq;
+
+	return BLKPREP_OK;
+}
+
+ide_devset_get(multcount, mult_count);
+
+/*
+ * This is tightly woven into the driver->do_special can not touch.
+ * DON'T do it again until a total personality rewrite is committed.
+ */
+static int set_multcount(ide_drive_t *drive, int arg)
+{
+	struct request *rq;
+	int error;
+
+	if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
+		return -EINVAL;
+
+	if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
+		return -EBUSY;
+
+	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
+	rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
+
+	drive->mult_req = arg;
+	drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
+	error = blk_execute_rq(drive->queue, NULL, rq, 0);
+	blk_put_request(rq);
+
+	return (drive->mult_count == arg) ? 0 : -EIO;
+}
+
+ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
+
+static int set_nowerr(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (arg)
+		drive->dev_flags |= IDE_DFLAG_NOWERR;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_NOWERR;
+
+	drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
+
+	return 0;
+}
+
+static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
+{
+	struct ide_cmd cmd;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf.feature = feature;
+	cmd.tf.nsect   = nsect;
+	cmd.tf.command = ATA_CMD_SET_FEATURES;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	return ide_no_data_taskfile(drive, &cmd);
+}
+
+static void update_flush(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	unsigned flush = 0;
+
+	if (drive->dev_flags & IDE_DFLAG_WCACHE) {
+		unsigned long long capacity;
+		int barrier;
+		/*
+		 * We must avoid issuing commands a drive does not
+		 * understand or we may crash it. We check flush cache
+		 * is supported. We also check we have the LBA48 flush
+		 * cache if the drive capacity is too large. By this
+		 * time we have trimmed the drive capacity if LBA48 is
+		 * not available so we don't need to recheck that.
+		 */
+		capacity = ide_gd_capacity(drive);
+		barrier = ata_id_flush_enabled(id) &&
+			(drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
+			((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
+			 capacity <= (1ULL << 28) ||
+			 ata_id_flush_ext_enabled(id));
+
+		printk(KERN_INFO "%s: cache flushes %ssupported\n",
+		       drive->name, barrier ? "" : "not ");
+
+		if (barrier) {
+			flush = REQ_FLUSH;
+			blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
+		}
+	}
+
+	blk_queue_flush(drive->queue, flush);
+}
+
+ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
+
+static int set_wcache(ide_drive_t *drive, int arg)
+{
+	int err = 1;
+
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (ata_id_flush_enabled(drive->id)) {
+		err = ide_do_setfeature(drive,
+			arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
+		if (err == 0) {
+			if (arg)
+				drive->dev_flags |= IDE_DFLAG_WCACHE;
+			else
+				drive->dev_flags &= ~IDE_DFLAG_WCACHE;
+		}
+	}
+
+	update_flush(drive);
+
+	return err;
+}
+
+static int do_idedisk_flushcache(ide_drive_t *drive)
+{
+	struct ide_cmd cmd;
+
+	memset(&cmd, 0, sizeof(cmd));
+	if (ata_id_flush_ext_enabled(drive->id))
+		cmd.tf.command = ATA_CMD_FLUSH_EXT;
+	else
+		cmd.tf.command = ATA_CMD_FLUSH;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	return ide_no_data_taskfile(drive, &cmd);
+}
+
+ide_devset_get(acoustic, acoustic);
+
+static int set_acoustic(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 254)
+		return -EINVAL;
+
+	ide_do_setfeature(drive,
+		arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
+
+	drive->acoustic = arg;
+
+	return 0;
+}
+
+ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
+
+/*
+ * drive->addressing:
+ *	0: 28-bit
+ *	1: 48-bit
+ *	2: 48-bit capable doing 28-bit
+ */
+static int set_addressing(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 2)
+		return -EINVAL;
+
+	if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+	    ata_id_lba48_enabled(drive->id) == 0))
+		return -EIO;
+
+	if (arg == 2)
+		arg = 0;
+
+	if (arg)
+		drive->dev_flags |= IDE_DFLAG_LBA48;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_LBA48;
+
+	return 0;
+}
+
+ide_ext_devset_rw(acoustic, acoustic);
+ide_ext_devset_rw(address, addressing);
+ide_ext_devset_rw(multcount, multcount);
+ide_ext_devset_rw(wcache, wcache);
+
+ide_ext_devset_rw_sync(nowerr, nowerr);
+
+static int ide_disk_check(ide_drive_t *drive, const char *s)
+{
+	return 1;
+}
+
+static void ide_disk_setup(ide_drive_t *drive)
+{
+	struct ide_disk_obj *idkp = drive->driver_data;
+	struct request_queue *q = drive->queue;
+	ide_hwif_t *hwif = drive->hwif;
+	u16 *id = drive->id;
+	char *m = (char *)&id[ATA_ID_PROD];
+	unsigned long long capacity;
+
+	ide_proc_register_driver(drive, idkp->driver);
+
+	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
+		return;
+
+	if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
+		/*
+		 * Removable disks (eg. SYQUEST); ignore 'WD' drives
+		 */
+		if (m[0] != 'W' || m[1] != 'D')
+			drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
+	}
+
+	(void)set_addressing(drive, 1);
+
+	if (drive->dev_flags & IDE_DFLAG_LBA48) {
+		int max_s = 2048;
+
+		if (max_s > hwif->rqsize)
+			max_s = hwif->rqsize;
+
+		blk_queue_max_hw_sectors(q, max_s);
+	}
+
+	printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
+	       queue_max_sectors(q) / 2);
+
+	if (ata_id_is_ssd(id)) {
+		queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
+		queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q);
+	}
+
+	/* calculate drive capacity, and select LBA if possible */
+	ide_disk_get_capacity(drive);
+
+	/*
+	 * if possible, give fdisk access to more of the drive,
+	 * by correcting bios_cyls:
+	 */
+	capacity = ide_gd_capacity(drive);
+
+	if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
+		if (ata_id_lba48_enabled(drive->id)) {
+			/* compatibility */
+			drive->bios_sect = 63;
+			drive->bios_head = 255;
+		}
+
+		if (drive->bios_sect && drive->bios_head) {
+			unsigned int cap0 = capacity; /* truncate to 32 bits */
+			unsigned int cylsz, cyl;
+
+			if (cap0 != capacity)
+				drive->bios_cyl = 65535;
+			else {
+				cylsz = drive->bios_sect * drive->bios_head;
+				cyl = cap0 / cylsz;
+				if (cyl > 65535)
+					cyl = 65535;
+				if (cyl > drive->bios_cyl)
+					drive->bios_cyl = cyl;
+			}
+		}
+	}
+	printk(KERN_INFO "%s: %llu sectors (%llu MB)",
+			 drive->name, capacity, sectors_to_MB(capacity));
+
+	/* Only print cache size when it was specified */
+	if (id[ATA_ID_BUF_SIZE])
+		printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
+
+	printk(KERN_CONT ", CHS=%d/%d/%d\n",
+			 drive->bios_cyl, drive->bios_head, drive->bios_sect);
+
+	/* write cache enabled? */
+	if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
+		drive->dev_flags |= IDE_DFLAG_WCACHE;
+
+	set_wcache(drive, 1);
+
+	if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
+	    (drive->head == 0 || drive->head > 16)) {
+		printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
+			drive->name, drive->head);
+		drive->dev_flags &= ~IDE_DFLAG_ATTACH;
+	} else
+		drive->dev_flags |= IDE_DFLAG_ATTACH;
+}
+
+static void ide_disk_flush(ide_drive_t *drive)
+{
+	if (ata_id_flush_enabled(drive->id) == 0 ||
+	    (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
+		return;
+
+	if (do_idedisk_flushcache(drive))
+		printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
+}
+
+static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
+{
+	return 0;
+}
+
+static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
+				 int on)
+{
+	struct ide_cmd cmd;
+	int ret;
+
+	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
+		return 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	ret = ide_no_data_taskfile(drive, &cmd);
+
+	if (ret)
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+
+	return ret;
+}
+
+const struct ide_disk_ops ide_ata_disk_ops = {
+	.check			= ide_disk_check,
+	.unlock_native_capacity	= ide_disk_unlock_native_capacity,
+	.get_capacity		= ide_disk_get_capacity,
+	.setup			= ide_disk_setup,
+	.flush			= ide_disk_flush,
+	.init_media		= ide_disk_init_media,
+	.set_doorlock		= ide_disk_set_doorlock,
+	.do_request		= ide_do_rw_disk,
+	.ioctl			= ide_disk_ioctl,
+};