path: root/include/linux/libata.h

/*
 *  Copyright 2003-2005 Red Hat, Inc.  All rights reserved.
 *  Copyright 2003-2005 Jeff Garzik
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 *  libata documentation is available via 'make {ps|pdf}docs',
 *  as Documentation/DocBook/libata.*
 *
 */

#ifndef __LINUX_LIBATA_H__
#define __LINUX_LIBATA_H__

#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/io.h>
#include <linux/ata.h>
#include <linux/workqueue.h>
#include <scsi/scsi_host.h>
#include <linux/acpi.h>
#include <linux/cdrom.h>

/*
 * Define if arch has non-standard setup.  This is a _PCI_ standard
 * not a legacy or ISA standard.
 */
#ifdef CONFIG_ATA_NONSTANDARD
#include <asm/libata-portmap.h>
#else
#include <asm-generic/libata-portmap.h>
#endif

/*
 * compile-time options: to be removed as soon as all the drivers are
 * converted to the new debugging mechanism
 */
#undef ATA_DEBUG		/* debugging output */
#undef ATA_VERBOSE_DEBUG	/* yet more debugging output */
#undef ATA_IRQ_TRAP		/* define to ack screaming irqs */
#undef ATA_NDEBUG		/* define to disable quick runtime checks */


/* note: prints function name for you */
#ifdef ATA_DEBUG
#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#ifdef ATA_VERBOSE_DEBUG
#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#else
#define VPRINTK(fmt, args...)
#endif	/* ATA_VERBOSE_DEBUG */
#else
#define DPRINTK(fmt, args...)
#define VPRINTK(fmt, args...)
#endif	/* ATA_DEBUG */

#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)

/* NEW: debug levels */
#define HAVE_LIBATA_MSG 1

enum {
	ATA_MSG_DRV	= 0x0001,
	ATA_MSG_INFO	= 0x0002,
	ATA_MSG_PROBE	= 0x0004,
	ATA_MSG_WARN	= 0x0008,
	ATA_MSG_MALLOC	= 0x0010,
	ATA_MSG_CTL	= 0x0020,
	ATA_MSG_INTR	= 0x0040,
	ATA_MSG_ERR	= 0x0080,
};

#define ata_msg_drv(p)    ((p)->msg_enable & ATA_MSG_DRV)
#define ata_msg_info(p)   ((p)->msg_enable & ATA_MSG_INFO)
#define ata_msg_probe(p)  ((p)->msg_enable & ATA_MSG_PROBE)
#define ata_msg_warn(p)   ((p)->msg_enable & ATA_MSG_WARN)
#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
#define ata_msg_ctl(p)    ((p)->msg_enable & ATA_MSG_CTL)
#define ata_msg_intr(p)   ((p)->msg_enable & ATA_MSG_INTR)
#define ata_msg_err(p)    ((p)->msg_enable & ATA_MSG_ERR)

static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
{
	if (dval < 0 || dval >= (sizeof(u32) * 8))
		return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
	if (!dval)
		return 0;
	return (1 << dval) - 1;
}

/* defines only for the constants which don't work well as enums */
#define ATA_TAG_POISON		0xfafbfcfdU

enum {
	/* various global constants */
	LIBATA_MAX_PRD		= ATA_MAX_PRD / 2,
	LIBATA_DUMB_MAX_PRD	= ATA_MAX_PRD / 4,	/* Worst case */
	ATA_MAX_PORTS		= 8,
	ATA_DEF_QUEUE		= 1,
	/* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
	ATA_MAX_QUEUE		= 32,
	ATA_TAG_INTERNAL	= ATA_MAX_QUEUE - 1,
	ATA_MAX_BUS		= 2,
	ATA_DEF_BUSY_WAIT	= 10000,
	ATA_SHORT_PAUSE		= (HZ >> 6) + 1,

	ATAPI_MAX_DRAIN		= 16 << 10,

	ATA_ALL_DEVICES		= (1 << ATA_MAX_DEVICES) - 1,

	ATA_SHT_EMULATED	= 1,
	ATA_SHT_CMD_PER_LUN	= 1,
	ATA_SHT_THIS_ID		= -1,
	ATA_SHT_USE_CLUSTERING	= 1,

	/* struct ata_device stuff */
	ATA_DFLAG_LBA		= (1 << 0), /* device supports LBA */
	ATA_DFLAG_LBA48		= (1 << 1), /* device supports LBA48 */
	ATA_DFLAG_CDB_INTR	= (1 << 2), /* device asserts INTRQ when ready for CDB */
	ATA_DFLAG_NCQ		= (1 << 3), /* device supports NCQ */
	ATA_DFLAG_FLUSH_EXT	= (1 << 4), /* do FLUSH_EXT instead of FLUSH */
	ATA_DFLAG_ACPI_PENDING	= (1 << 5), /* ACPI resume action pending */
	ATA_DFLAG_ACPI_FAILED	= (1 << 6), /* ACPI on devcfg has failed */
	ATA_DFLAG_AN		= (1 << 7), /* AN configured */
	ATA_DFLAG_HIPM		= (1 << 8), /* device supports HIPM */
	ATA_DFLAG_DIPM		= (1 << 9), /* device supports DIPM */
	ATA_DFLAG_DMADIR	= (1 << 10), /* device requires DMADIR */
	ATA_DFLAG_CFG_MASK	= (1 << 12) - 1,

	ATA_DFLAG_PIO		= (1 << 12), /* device limited to PIO mode */
	ATA_DFLAG_NCQ_OFF	= (1 << 13), /* device limited to non-NCQ mode */
	ATA_DFLAG_SPUNDOWN	= (1 << 14), /* XXX: for spindown_compat */
	ATA_DFLAG_SLEEPING	= (1 << 15), /* device is sleeping */
	ATA_DFLAG_DUBIOUS_XFER	= (1 << 16), /* data transfer not verified */
	ATA_DFLAG_INIT_MASK	= (1 << 24) - 1,

	ATA_DFLAG_DETACH	= (1 << 24),
	ATA_DFLAG_DETACHED	= (1 << 25),

	ATA_DEV_UNKNOWN		= 0,	/* unknown device */
	ATA_DEV_ATA		= 1,	/* ATA device */
	ATA_DEV_ATA_UNSUP	= 2,	/* ATA device (unsupported) */
	ATA_DEV_ATAPI		= 3,	/* ATAPI device */
	ATA_DEV_ATAPI_UNSUP	= 4,	/* ATAPI device (unsupported) */
	ATA_DEV_PMP		= 5,	/* SATA port multiplier */
	ATA_DEV_PMP_UNSUP	= 6,	/* SATA port multiplier (unsupported) */
	ATA_DEV_SEMB		= 7,	/* SEMB */
	ATA_DEV_SEMB_UNSUP	= 8,	/* SEMB (unsupported) */
	ATA_DEV_NONE		= 9,	/* no device */

	/* struct ata_link flags */
	ATA_LFLAG_NO_SRST	= (1 << 2), /* avoid softreset */
	ATA_LFLAG_ASSUME_ATA	= (1 << 3), /* assume ATA class */
	ATA_LFLAG_ASSUME_SEMB	= (1 << 4), /* assume SEMB class */
	ATA_LFLAG_ASSUME_CLASS	= ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
	ATA_LFLAG_NO_RETRY	= (1 << 5), /* don't retry this link */
	ATA_LFLAG_DISABLED	= (1 << 6), /* link is disabled */

	/* struct ata_port flags */
	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* h