Initial import

1 files changed, 1964 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
new file mode 100644
index 000000000..c27a346a1
--- /dev/null
+++ b/include/linux/libata.h
@@ -0,0 +1,1964 @@
+/*
+ *  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/jiffies.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>
+#include <linux/sched.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, __func__, ## args)
+#ifdef ATA_VERBOSE_DEBUG
+#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## 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, __func__, ## args)
+
+#define ata_print_version_once(dev, version)			\
+({								\
+	static bool __print_once;				\
+								\
+	if (!__print_once) {					\
+		__print_once = true;				\
+		ata_print_version(dev, version);		\
+	}							\
+})
+
+/* 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_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_SHORT_PAUSE		= 16,
+
+	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_taskfile flags */
+	ATA_TFLAG_LBA48		= (1 << 0), /* enable 48-bit LBA and "HOB" */
+	ATA_TFLAG_ISADDR	= (1 << 1), /* enable r/w to nsect/lba regs */
+	ATA_TFLAG_DEVICE	= (1 << 2), /* enable r/w to device reg */
+	ATA_TFLAG_WRITE		= (1 << 3), /* data dir: host->dev==1 (write) */
+	ATA_TFLAG_LBA		= (1 << 4), /* enable LBA */
+	ATA_TFLAG_FUA		= (1 << 5), /* enable FUA */
+	ATA_TFLAG_POLLING	= (1 << 6), /* set nIEN to 1 and use polling */
+
+	/* protocol flags */
+	ATA_PROT_FLAG_PIO	= (1 << 0), /* is PIO */
+	ATA_PROT_FLAG_DMA	= (1 << 1), /* is DMA */
+	ATA_PROT_FLAG_DATA	= ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
+	ATA_PROT_FLAG_NCQ	= (1 << 2), /* is NCQ */
+	ATA_PROT_FLAG_ATAPI	= (1 << 3), /* is ATAPI */
+
+	/* 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_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_SLEEPING	= (1 << 15), /* device is sleeping */
+	ATA_DFLAG_DUBIOUS_XFER	= (1 << 16), /* data transfer not verified */
+	ATA_DFLAG_NO_UNLOAD	= (1 << 17), /* device doesn't support unload */
+	ATA_DFLAG_UNLOCK_HPA	= (1 << 18), /* unlock HPA */
+	ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
+	ATA_DFLAG_INIT_MASK	= (1 << 24) - 1,
+
+	ATA_DFLAG_DETACH	= (1 << 24),
+	ATA_DFLAG_DETACHED	= (1 << 25),
+
+	ATA_DFLAG_DA		= (1 << 26), /* device supports Device Attention */
+	ATA_DFLAG_DEVSLP	= (1 << 27), /* device supports Device Sleep */
+	ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
+
+	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_ZAC		= 9,	/* ZAC device */
+	ATA_DEV_NONE		= 10,	/* no device */
+
+	/* struct ata_link flags */
+	ATA_LFLAG_NO_HRST	= (1 << 1), /* avoid hardreset */
+	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 */
+	ATA_LFLAG_SW_ACTIVITY	= (1 << 7), /* keep activity stats */
+	ATA_LFLAG_NO_LPM	= (1 << 8), /* disable LPM on this link */
+	ATA_LFLAG_RST_ONCE	= (1 << 9), /* limit recovery to one reset */
+	ATA_LFLAG_CHANGED	= (1 << 10), /* LPM state changed on this link */
+
+	/* struct ata_port flags */
+	ATA_FLAG_SLAVE_POSS	= (1 << 0), /* host supports slave dev */
+					    /* (doesn't imply presence) */
+	ATA_FLAG_SATA		= (1 << 1),
+	ATA_FLAG_NO_ATAPI	= (1 << 6), /* No ATAPI support */
+	ATA_FLAG_PIO_DMA	= (1 << 7), /* PIO cmds via DMA */
+	ATA_FLAG_PIO_LBA48	= (1 << 8), /* Host DMA engine is LBA28 only */
+	ATA_FLAG_PIO_POLLING	= (1 << 9), /* use polling PIO if LLD
+					     * doesn't handle PIO interrupts */
+	ATA_FLAG_NCQ		= (1 << 10), /* host supports NCQ */
+	ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
+	ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
+	ATA_FLAG_DEBUGMSG	= (1 << 13),
+	ATA_FLAG_FPDMA_AA		= (1 << 14), /* driver supports Auto-Activate */
+	ATA_FLAG_IGN_SIMPLEX	= (1 << 15), /* ignore SIMPLEX */
+	ATA_FLAG_NO_IORDY	= (1 << 16), /* controller lacks iordy */
+	ATA_FLAG_ACPI_SATA	= (1 << 17), /* need native SATA ACPI layout */
+	ATA_FLAG_AN		= (1 << 18), /* controller supports AN */
+	ATA_FLAG_PMP		= (1 << 19), /* controller supports PMP */
+	ATA_FLAG_FPDMA_AUX	= (1 << 20), /* controller supports H2DFIS aux field */
+	ATA_FLAG_EM		= (1 << 21), /* driver supports enclosure
+					      * management */
+	ATA_FLAG_SW_ACTIVITY	= (1 << 22), /* driver supports sw activity
+					      * led */
+	ATA_FLAG_NO_DIPM	= (1 << 23), /* host not happy with DIPM */
+	ATA_FLAG_SAS_HOST	= (1 << 24), /* SAS host */
+
+	/* bits 24:31 of ap->flags are reserved for LLD specific flags */
+
+
+	/* struct ata_port pflags */
+	ATA_PFLAG_EH_PENDING	= (1 << 0), /* EH pending */
+	ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
+	ATA_PFLAG_FROZEN	= (1 << 2), /* port is frozen */
+	ATA_PFLAG_RECOVERED	= (1 << 3), /* recovery action performed */
+	ATA_PFLAG_LOADING	= (1 << 4), /* boot/loading probe */
+	ATA_PFLAG_SCSI_HOTPLUG	= (1 << 6), /* SCSI hotplug scheduled */
+	ATA_PFLAG_INITIALIZING	= (1 << 7), /* being initialized, don't touch */
+	ATA_PFLAG_RESETTING	= (1 << 8), /* reset in progress */
+	ATA_PFLAG_UNLOADING	= (1 << 9), /* driver is being unloaded */
+	ATA_PFLAG_UNLOADED	= (1 << 10), /* driver is unloaded */
+
+	ATA_PFLAG_SUSPENDED	= (1 << 17), /* port is suspended (power) */
+	ATA_PFLAG_PM_PENDING	= (1 << 18), /* PM operation pending */
+	ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
+
+	ATA_PFLAG_PIO32		= (1 << 20),  /* 32bit PIO */
+	ATA_PFLAG_PIO32CHANGE	= (1 << 21),  /* 32bit PIO can be turned on/off */
+
+	/* struct ata_queued_cmd flags */
+	ATA_QCFLAG_ACTIVE	= (1 << 0), /* cmd not yet ack'd to scsi lyer */
+	ATA_QCFLAG_DMAMAP	= (1 << 1), /* SG table is DMA mapped */
+	ATA_QCFLAG_IO		= (1 << 3), /* standard IO command */
+	ATA_QCFLAG_RESULT_TF	= (1 << 4), /* result TF requested */
+	ATA_QCFLAG_CLEAR_EXCL	= (1 << 5), /* clear excl_link on completion */
+	ATA_QCFLAG_QUIET	= (1 << 6), /* don't report device error */
+	ATA_QCFLAG_RETRY	= (1 << 7), /* retry after failure */
+
+	ATA_QCFLAG_FAILED	= (1 << 16), /* cmd failed and is owned by EH */
+	ATA_QCFLAG_SENSE_VALID	= (1 << 17), /* sense data valid */
+	ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
+
+	/* host set flags */
+	ATA_HOST_SIMPLEX	= (1 << 0),	/* Host is simplex, one DMA channel per host only */
+	ATA_HOST_STARTED	= (1 << 1),	/* Host started */
+	ATA_HOST_PARALLEL_SCAN	= (1 << 2),	/* Ports on this host can be scanned in parallel */
+	ATA_HOST_IGNORE_ATA	= (1 << 3),	/* Ignore ATA devices on this host. */
+
+	/* bits 24:31 of host->flags are reserved for LLD specific flags */
+
+	/* various lengths of time */
+	ATA_TMOUT_BOOT		= 30000,	/* heuristic */
+	ATA_TMOUT_BOOT_QUICK	=  7000,	/* heuristic */
+	ATA_TMOUT_INTERNAL_QUICK = 5000,
+	ATA_TMOUT_MAX_PARK	= 30000,
+
+	/*
+	 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms.  2s
+	 * is too much without parallel probing.  Use 2s if parallel
+	 * probing is available, 800ms otherwise.
+	 */
+	ATA_TMOUT_FF_WAIT_LONG	=  2000,
+	ATA_TMOUT_FF_WAIT	=   800,
+
+	/* Spec mandates to wait for ">= 2ms" before checking status
+	 * after reset.  We wait 150ms, because that was the magic
+	 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
+	 * the period of time between when the ATA command register is
+	 * written, and then status is checked.  Because waiting for
+	 * "a while" before checking status is fine, post SRST, we
+	 * perform this magic delay here as well.
+	 *
+	 * Old drivers/ide uses the 2mS rule and then waits for ready.
+	 */
+	ATA_WAIT_AFTER_RESET	=  150,
+
+	/* If PMP is supported, we have to do follow-up SRST.  As some
+	 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
+	 * advised to wait only for the following duration before
+	 * doing SRST.
+	 */
+	ATA_TMOUT_PMP_SRST_WAIT	= 5000,
+
+	/* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
+	 * be a spurious PHY event, so ignore the first PHY event that
+	 * occurs within 10s after the policy change.
+	 */
+	ATA_TMOUT_SPURIOUS_PHY	= 10000,
+
+	/* ATA bus states */
+	BUS_UNKNOWN		= 0,
+	BUS_DMA			= 1,
+	BUS_IDLE		= 2,
+	BUS_NOINTR		= 3,
+	BUS_NODATA		= 4,
+	BUS_TIMER		= 5,
+	BUS_PIO			= 6,
+	BUS_EDD			= 7,
+	BUS_IDENTIFY		= 8,
+	BUS_PACKET		= 9,
+
+	/* SATA port states */
+	PORT_UNKNOWN		= 0,
+	PORT_ENABLED		= 1,
+	PORT_DISABLED		= 2,
+
+	/* encoding various smaller bitmaps into a single
+	 * unsigned long bitmap
+	 */
+	ATA_NR_PIO_MODES	= 7,
+	ATA_NR_MWDMA_MODES	= 5,
+	ATA_NR_UDMA_MODES	= 8,
+
+	ATA_SHIFT_PIO		= 0,
+	ATA_SHIFT_MWDMA		= ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
+	ATA_SHIFT_UDMA		= ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
+
+	/* size of buffer to pad xfers ending on unaligned boundaries */
+	ATA_DMA_PAD_SZ		= 4,
+
+	/* ering size */
+	ATA_ERING_SIZE		= 32,
+
+	/* return values for ->qc_defer */
+	ATA_DEFER_LINK		= 1,
+	ATA_DEFER_PORT		= 2,
+
+	/* desc_len for ata_eh_info and context */
+	ATA_EH_DESC_LEN		= 80,
+
+	/* reset / recovery action types */
+	ATA_EH_REVALIDATE	= (1 << 0),
+	ATA_EH_SOFTRESET	= (1 << 1), /* meaningful only in ->prereset */
+	ATA_EH_HARDRESET	= (1 << 2), /* meaningful only in ->prereset */
+	ATA_EH_RESET		= ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
+	ATA_EH_ENABLE_LINK	= (1 << 3),
+	ATA_EH_PARK		= (1 << 5), /* unload heads and stop I/O */
+
+	ATA_EH_PERDEV_MASK	= ATA_EH_REVALIDATE | ATA_EH_PARK,
+	ATA_EH_ALL_ACTIONS	= ATA_EH_REVALIDATE | ATA_EH_RESET |
+				  ATA_EH_ENABLE_LINK,
+
+	/* ata_eh_info->flags */
+	ATA_EHI_HOTPLUGGED	= (1 << 0),  /* could have been hotplugged */
+	ATA_EHI_NO_AUTOPSY	= (1 << 2),  /* no autopsy */
+	ATA_EHI_QUIET		= (1 << 3),  /* be quiet */
+	ATA_EHI_NO_RECOVERY	= (1 << 4),  /* no recovery */
+
+	ATA_EHI_DID_SOFTRESET	= (1 << 16), /* already soft-reset this port */
+	ATA_EHI_DID_HARDRESET	= (1 << 17), /* already soft-reset this port */
+	ATA_EHI_PRINTINFO	= (1 << 18), /* print configuration info */
+	ATA_EHI_SETMODE		= (1 << 19), /* configure transfer mode */
+	ATA_EHI_POST_SETMODE	= (1 << 20), /* revalidating after setmode */
+
+	ATA_EHI_DID_RESET	= ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
+
+	/* mask of flags to transfer *to* the slave link */
+	ATA_EHI_TO_SLAVE_MASK	= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
+
+	/* max tries if error condition is still set after ->error_handler */
+	ATA_EH_MAX_TRIES	= 5,
+
+	/* sometimes resuming a link requires several retries */
+	ATA_LINK_RESUME_TRIES	= 5,
+
+	/* how hard are we gonna try to probe/recover devices */
+	ATA_PROBE_MAX_TRIES	= 3,
+	ATA_EH_DEV_TRIES	= 3,
+	ATA_EH_PMP_TRIES	= 5,
+	ATA_EH_PMP_LINK_TRIES	= 3,
+
+	SATA_PMP_RW_TIMEOUT	= 3000,		/* PMP read/write timeout */
+
+	/* This should match the actual table size of
+	 * ata_eh_cmd_timeout_table in libata-eh.c.
+	 */
+	ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
+
+	/* Horkage types. May be set by libata or controller on drives
+	   (some horkage may be drive/controller pair dependent */
+
+	ATA_HORKAGE_DIAGNOSTIC	= (1 << 0),	/* Failed boot diag */
+	ATA_HORKAGE_NODMA	= (1 << 1),	/* DMA problems */
+	ATA_HORKAGE_NONCQ	= (1 << 2),	/* Don't use NCQ */
+	ATA_HORKAGE_MAX_SEC_128	= (1 << 3),	/* Limit max sects to 128 */
+	ATA_HORKAGE_BROKEN_HPA	= (1 << 4),	/* Broken HPA */
+	ATA_HORKAGE_DISABLE	= (1 << 5),	/* Disable it */
+	ATA_HORKAGE_HPA_SIZE	= (1 << 6),	/* native size off by one */
+	ATA_HORKAGE_IVB		= (1 << 8),	/* cbl det validity bit bugs */
+	ATA_HORKAGE_STUCK_ERR	= (1 << 9),	/* stuck ERR on next PACKET */
+	ATA_HORKAGE_BRIDGE_OK	= (1 << 10),	/* no bridge limits */
+	ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
+						    not multiple of 16 bytes */
+	ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),	/* firmware update warning */
+	ATA_HORKAGE_1_5_GBPS	= (1 << 13),	/* force 1.5 Gbps */
+	ATA_HORKAGE_NOSETXFER	= (1 << 14),	/* skip SETXFER, SATA only */
+	ATA_HORKAGE_BROKEN_FPDMA_AA	= (1 << 15),	/* skip AA */
+	ATA_HORKAGE_DUMP_ID	= (1 << 16),	/* dump IDENTIFY data */
+	ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),	/* Set max sects to 65535 */
+	ATA_HORKAGE_ATAPI_DMADIR = (1 << 18),	/* device requires dmadir */
+	ATA_HORKAGE_NO_NCQ_TRIM	= (1 << 19),	/* don't use queued TRIM */
+	ATA_HORKAGE_NOLPM	= (1 << 20),	/* don't use LPM */
+	ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),	/* some WDs have broken LPM */
+	ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
+	ATA_HORKAGE_NO_NCQ_LOG	= (1 << 23),	/* don't use NCQ for log read */
+	ATA_HORKAGE_NOTRIM	= (1 << 24),	/* don't use TRIM */
+	ATA_HORKAGE_MAX_SEC_1024 = (1 << 25),	/* Limit max sects to 1024 */
+
+	 /* DMA mask for user DMA control: User visible values; DO NOT
+	    renumber */
+	ATA_DMA_MASK_ATA	= (1 << 0),	/* DMA on ATA Disk */
+	ATA_DMA_MASK_ATAPI	= (1 << 1),	/* DMA on ATAPI */
+	ATA_DMA_MASK_CFA	= (1 << 2),	/* DMA on CF Card */
+
+	/* ATAPI command types */
+	ATAPI_READ		= 0,		/* READs */
+	ATAPI_WRITE		= 1,		/* WRITEs */
+	ATAPI_READ_CD		= 2,		/* READ CD [MSF] */
+	ATAPI_PASS_THRU		= 3,		/* SAT pass-thru */
+	ATAPI_MISC		= 4,		/* the rest */
+
+	/* Timing constants */
+	ATA_TIMING_SETUP	= (1 << 0),
+	ATA_TIMING_ACT8B	= (1 << 1),
+	ATA_TIMING_REC8B	= (1 << 2),
+	ATA_TIMING_CYC8B	= (1 << 3),
+	ATA_TIMING_8BIT		= ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
+				  ATA_TIMING_CYC8B,
+	ATA_TIMING_ACTIVE	= (1 << 4),
+	ATA_TIMING_RECOVER	= (1 << 5),
+	ATA_TIMING_DMACK_HOLD	= (1 << 6),
+	ATA_TIMING_CYCLE	= (1 << 7),
+	ATA_TIMING_UDMA		= (1 << 8),
+	ATA_TIMING_ALL		= ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
+				  ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
+				  ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
+				  ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
+				  ATA_TIMING_UDMA,
+
+	/* ACPI constants */
+	ATA_ACPI_FILTER_SETXFER	= 1 << 0,
+	ATA_ACPI_FILTER_LOCK	= 1 << 1,
+	ATA_ACPI_FILTER_DIPM	= 1 << 2,
+	ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3,	/* FPDMA non-zero offset */
+	ATA_ACPI_FILTER_FPDMA_AA = 1 << 4,	/* FPDMA auto activate */
+
+	ATA_ACPI_FILTER_DEFAULT	= ATA_ACPI_FILTER_SETXFER |
+				  ATA_ACPI_FILTER_LOCK |
+				  ATA_ACPI_FILTER_DIPM,
+};
+
+enum ata_xfer_mask {
+	ATA_MASK_PIO		= ((1LU << ATA_NR_PIO_MODES) - 1)
+					<< ATA_SHIFT_PIO,
+	ATA_MASK_MWDMA		= ((1LU << ATA_NR_MWDMA_MODES) - 1)
+					<< ATA_SHIFT_MWDMA,
+	ATA_MASK_UDMA		= ((1LU << ATA_NR_UDMA_MODES) - 1)
+					<< ATA_SHIFT_UDMA,
+};
+
+enum hsm_task_states {
+	HSM_ST_IDLE,		/* no command on going */
+	HSM_ST_FIRST,		/* (waiting the device to)
+				   write CDB or first data block */
+	HSM_ST,			/* (waiting the device to) transfer data */
+	HSM_ST_LAST,		/* (waiting the device to) complete command */
+	HSM_ST_ERR,		/* error */
+};
+
+enum ata_completion_errors {
+	AC_ERR_DEV		= (1 << 0), /* device reported error */
+	AC_ERR_HSM		= (1 << 1), /* host state machine violation */
+	AC_ERR_TIMEOUT		= (1 << 2), /* timeout */
+	AC_ERR_MEDIA		= (1 << 3), /* media error */
+	AC_ERR_ATA_BUS		= (1 << 4), /* ATA bus error */
+	AC_ERR_HOST_BUS		= (1 << 5), /* host bus error */
+	AC_ERR_SYSTEM		= (1 << 6), /* system error */
+	AC_ERR_INVALID		= (1 << 7), /* invalid argument */
+	AC_ERR_OTHER		= (1 << 8), /* unknown */
+	AC_ERR_NODEV_HINT	= (1 << 9), /* polling device detection hint */
+	AC_ERR_NCQ		= (1 << 10), /* marker for offending NCQ qc */
+};
+
+/*
+ * Link power management policy: If you alter this, you also need to
+ * alter libata-scsi.c (for the ascii descriptions)
+ */
+enum ata_lpm_policy {
+	ATA_LPM_UNKNOWN,
+	ATA_LPM_MAX_POWER,
+	ATA_LPM_FIRMWARE_DEFAULTS,
+	ATA_LPM_MED_POWER,
+	ATA_LPM_MIN_POWER,
+};
+
+enum ata_lpm_hints {
+	ATA_LPM_EMPTY		= (1 << 0), /* port empty/probing */
+	ATA_LPM_HIPM		= (1 << 1), /* may use HIPM */
+};
+
+/* forward declarations */
+struct scsi_device;
+struct ata_port_operations;
+struct ata_port;
+struct ata_link;
+struct ata_queued_cmd;
+
+/* typedefs */
+typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
+typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
+typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
+			      unsigned long deadline);
+typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
+
+extern struct device_attribute dev_attr_link_power_management_policy;
+extern struct device_attribute dev_attr_unload_heads;
+extern struct device_attribute dev_attr_em_message_type;
+extern struct device_attribute dev_attr_em_message;
+extern struct device_attribute dev_attr_sw_activity;
+
+enum sw_activity {
+	OFF,
+	BLINK_ON,
+	BLINK_OFF,
+};
+
+struct ata_taskfile {
+	unsigned long		flags;		/* ATA_TFLAG_xxx */
+	u8			protocol;	/* ATA_PROT_xxx */
+
+	u8			ctl;		/* control reg */
+
+	u8			hob_feature;	/* additional data */
+	u8			hob_nsect;	/* to support LBA48 */
+	u8			hob_lbal;
+	u8			hob_lbam;
+	u8			hob_lbah;
+
+	u8			feature;
+	u8			nsect;
+	u8			lbal;
+	u8			lbam;
+	u8			lbah;
+
+	u8			device;
+
+	u8			command;	/* IO operation */
+
+	u32			auxiliary;	/* auxiliary field */
+						/* from SATA 3.1 and */
+						/* ATA-8 ACS-3 */
+};
+
+#ifdef CONFIG_ATA_SFF
+struct ata_ioports {
+	void __iomem		*cmd_addr;
+	void __iomem		*data_addr;
+	void __iomem		*error_addr;
+	void __iomem		*feature_addr;
+	void __iomem		*nsect_addr;
+	void __iomem		*lbal_addr;
+	void __iomem		*lbam_addr;
+	void __iomem		*lbah_addr;
+	void __iomem		*device_addr;
+	void __iomem		*status_addr;
+	void __iomem		*command_addr;
+	void __iomem		*altstatus_addr;
+	void __iomem		*ctl_addr;
+#ifdef CONFIG_ATA_BMDMA
+	void __iomem		*bmdma_addr;
+#endif /* CONFIG_ATA_BMDMA */
+	void __iomem		*scr_addr;
+};
+#endif /* CONFIG_ATA_SFF */
+
+struct ata_host {
+	spinlock_t		lock;
+	struct device 		*dev;
+	void __iomem * const	*iomap;
+	unsigned int		n_ports;
+	unsigned int		n_tags;			/* nr of NCQ tags */
+	void			*private_data;
+	struct ata_port_operations *ops;
+	unsigned long		flags;
+
+	struct mutex		eh_mutex;
+	struct task_struct	*eh_owner;
+
+	struct ata_port		*simplex_claimed;	/* channel owning the DMA */
+	struct ata_port		*ports[0];
+};
+
+struct ata_queued_cmd {
+	struct ata_port		*ap;
+	struct ata_device	*dev;
+
+	struct scsi_cmnd	*scsicmd;
+	void			(*scsidone)(struct scsi_cmnd *);
+
+	struct ata_taskfile	tf;
+	u8			cdb[ATAPI_CDB_LEN];
+
+	unsigned long		flags;		/* ATA_QCFLAG_xxx */
+	unsigned int		tag;
+	unsigned int		n_elem;
+	unsigned int		orig_n_elem;
+
+	int			dma_dir;
+
+	unsigned int		sect_size;
+
+	unsigned int		nbytes;
+	unsigned int		extrabytes;
+	unsigned int		curbytes;
+
+	struct scatterlist	sgent;
+
+	struct scatterlist	*sg;
+
+	struct scatterlist	*cursg;
+	unsigned int		cursg_ofs;
+
+	unsigned int		err_mask;
+	struct ata_taskfile	result_tf;
+	ata_qc_cb_t		complete_fn;
+
+	void			*private_data;
+	void			*lldd_task;
+};
+
+struct ata_port_stats {
+	unsigned long		unhandled_irq;
+	unsigned long		idle_irq;
+	unsigned long		rw_reqbuf;
+};
+
+struct ata_ering_entry {
+	unsigned int		eflags;
+	unsigned int		err_mask;
+	u64			timestamp;
+};
+
+struct ata_ering {
+	int			cursor;
+	struct ata_ering_entry	ring[ATA_ERING_SIZE];
+};
+
+struct ata_device {
+	struct ata_link		*link;
+	unsigned int		devno;		/* 0 or 1 */
+	unsigned int		horkage;	/* List of broken features */
+	unsigned long		flags;		/* ATA_DFLAG_xxx */
+	struct scsi_device	*sdev;		/* attached SCSI device */
+	void			*private_data;
+#ifdef CONFIG_ATA_ACPI
+	union acpi_object	*gtf_cache;
+	unsigned int		gtf_filter;
+#endif
+#ifdef CONFIG_SATA_ZPODD
+	void			*zpodd;
+#endif
+	struct device		tdev;
+	/* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
+	u64			n_sectors;	/* size of device, if ATA */
+	u64			n_native_sectors; /* native size, if ATA */
+	unsigned int		class;		/* ATA_DEV_xxx */
+	unsigned long		unpark_deadline;
+
+	u8			pio_mode;
+	u8			dma_mode;
+	u8			xfer_mode;
+	unsigned int		xfer_shift;	/* ATA_SHIFT_xxx */
+
+	unsigned int		multi_count;	/* sectors count for
+						   READ/WRITE MULTIPLE */
+	unsigned int		max_sectors;	/* per-device max sectors */
+	unsigned int		cdb_len;
+
+	/* per-dev xfer mask */
+	unsigned long		pio_mask;
+	unsigned long		mwdma_mask;
+	unsigned long		udma_mask;
+
+	/* for CHS addressing */
+	u16			cylinders;	/* Number of cylinders */
+	u16			heads;		/* Number of heads */
+	u16			sectors;	/* Number of sectors per track */
+
+	union {
+		u16		id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
+		u32		gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
+	};
+
+	/* DEVSLP Timing Variables from Identify Device Data Log */
+	u8			devslp_timing[ATA_LOG_DEVSLP_SIZE];
+
+	/* NCQ send and receive log subcommand support */
+	u8			ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
+
+	/* error history */
+	int			spdn_cnt;
+	/* ering is CLEAR_END, read comment above CLEAR_END */
+	struct ata_ering	ering;
+	/* Initial DIPM configuration */
+	bool			init_dipm;
+};
+
+/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
+ * cleared to zero on ata_dev_init().
+ */
+#define ATA_DEVICE_CLEAR_BEGIN		offsetof(struct ata_device, n_sectors)
+#define ATA_DEVICE_CLEAR_END		offsetof(struct ata_device, ering)
+
+struct ata_eh_info {
+	struct ata_device	*dev;		/* offending device */
+	u32			serror;		/* SError from LLDD */
+	unsigned int		err_mask;	/* port-wide err_mask */
+	unsigned int		action;		/* ATA_EH_* action mask */
+	unsigned int		dev_action[ATA_MAX_DEVICES]; /* dev EH action */
+	unsigned int		flags;		/* ATA_EHI_* flags */
+
+	unsigned int		probe_mask;
+
+	char			desc[ATA_EH_DESC_LEN];
+	int			desc_len;
+};
+
+struct ata_eh_context {
+	struct ata_eh_info	i;
+	int			tries[ATA_MAX_DEVICES];
+	int			cmd_timeout_idx[ATA_MAX_DEVICES]
+					       [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
+	unsigned int		classes[ATA_MAX_DEVICES];
+	unsigned int		did_probe_mask;
+	unsigned int		unloaded_mask;
+	unsigned int		saved_ncq_enabled;
+	u8			saved_xfer_mode[ATA_MAX_DEVICES];
+	/* timestamp for the last reset attempt or success */
+	unsigned long		last_reset;
+};
+
+struct ata_acpi_drive
+{
+	u32 pio;
+	u32 dma;
+} __packed;
+
+struct ata_acpi_gtm {
+	struct ata_acpi_drive drive[2];
+	u32 flags;
+} __packed;
+
+struct ata_link {
+	struct ata_port		*ap;
+	int			pmp;		/* port multiplier port # */
+
+	struct device		tdev;
+	unsigned int		active_tag;	/* active tag on this link */
+	u32			sactive;	/* active NCQ commands */
+
+	unsigned int		flags;		/* ATA_LFLAG_xxx */
+
+	u32			saved_scontrol;	/* SControl on probe */
+	unsigned int		hw_sata_spd_limit;
+	unsigned int		sata_spd_limit;
+	unsigned int		sata_spd;	/* current SATA PHY speed */
+	enum ata_lpm_policy	lpm_policy;
+
+	/* record runtime error info, protected by host_set lock */
+	struct ata_eh_info	eh_info;
+	/* EH context */
+	struct ata_eh_context	eh_context;
+
+	struct ata_device	device[ATA_MAX_DEVICES];
+
+	u8			init_lpm; /* initial lpm configuration */
+	unsigned long		last_lpm_change; /* when last LPM change happened */
+};
+#define ATA_LINK_CLEAR_BEGIN		offsetof(struct ata_link, active_tag)
+#define ATA_LINK_CLEAR_END		offsetof(struct ata_link, device[0])
+
+struct ata_port {
+	struct Scsi_Host	*scsi_host; /* our co-allocated scsi host */
+	struct ata_port_operations *ops;
+	spinlock_t		*lock;
+	/* Flags owned by the EH context. Only EH should touch these once the
+	   port is active */
+	unsigned long		flags;	/* ATA_FLAG_xxx */
+	/* Flags that change dynamically, protected by ap->lock */
+	unsigned int		pflags; /* ATA_PFLAG_xxx */
+	unsigned int		print_id; /* user visible unique port ID */
+	unsigned int            local_port_no; /* host local port num */
+	unsigned int		port_no; /* 0 based port no. inside the host */
+
+#ifdef CONFIG_ATA_SFF
+	struct ata_ioports	ioaddr;	/* ATA cmd/ctl/dma register blocks */
+	u8			ctl;	/* cache of ATA control register */
+	u8			last_ctl;	/* Cache last written value */
+	struct ata_link*	sff_pio_task_link; /* link currently used */
+	struct delayed_work	sff_pio_task;
+#ifdef CONFIG_ATA_BMDMA
+	struct ata_bmdma_prd	*bmdma_prd;	/* BMDMA SG list */
+	dma_addr_t		bmdma_prd_dma;	/* and its DMA mapping */
+#endif /* CONFIG_ATA_BMDMA */
+#endif /* CONFIG_ATA_SFF */
+
+	unsigned int		pio_mask;
+	unsigned int		mwdma_mask;
+	unsigned int		udma_mask;
+	unsigned int		cbl;	/* cable type; ATA_CBL_xxx */
+
+	struct ata_queued_cmd	qcmd[ATA_MAX_QUEUE];
+	unsigned long		sas_tag_allocated; /* for sas tag allocation only */
+	unsigned int		qc_active;
+	int			nr_active_links; /* #links with active qcs */
+	unsigned int		sas_last_tag;	/* track next tag hw expects */
+
+	struct ata_link		link;		/* host default link */
+	struct ata_link		*slave_link;	/* see ata_slave_link_init() */
+
+	int			nr_pmp_links;	/* nr of available PMP links */
+	struct ata_link		*pmp_link;	/* array of PMP links */
+	struct ata_link		*excl_link;	/* for PMP qc exclusion */
+
+	struct ata_port_stats	stats;
+	struct ata_host		*host;
+	struct device 		*dev;
+	struct device		tdev;
+
+	struct mutex		scsi_scan_mutex;
+	struct delayed_work	hotplug_task;
+	struct work_struct	scsi_rescan_task;
+
+	unsigned int		hsm_task_state;
+
+	u32			msg_enable;
+	struct list_head	eh_done_q;
+	wait_queue_head_t	eh_wait_q;
+	int			eh_tries;
+	struct completion	park_req_pending;
+
+	pm_message_t		pm_mesg;
+	enum ata_lpm_policy	target_lpm_policy;
+
+	struct timer_list	fastdrain_timer;
+	unsigned long		fastdrain_cnt;
+
+	int			em_message_type;
+	void			*private_data;
+
+#ifdef CONFIG_ATA_ACPI
+	struct ata_acpi_gtm	__acpi_init_gtm; /* use ata_acpi_init_gtm() */
+#endif
+	/* owned by EH */
+	u8			sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
+};
+
+/* The following initializer overrides a method to NULL whether one of
+ * its parent has the method defined or not.  This is equivalent to
+ * ERR_PTR(-ENOENT).  Unfortunately, ERR_PTR doesn't render a constant
+ * expression and thus can't be used as an initializer.
+ */
+#define ATA_OP_NULL		(void *)(unsigned long)(-ENOENT)
+
+struct ata_port_operations {
+	/*
+	 * Command execution
+	 */
+	int  (*qc_defer)(struct ata_queued_cmd *qc);
+	int  (*check_atapi_dma)(struct ata_queued_cmd *qc);
+	void (*qc_prep)(struct ata_queued_cmd *qc);
+	unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
+	bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
+
+	/*
+	 * Configuration and exception handling
+	 */
+	int  (*cable_detect)(struct ata_port *ap);
+	unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
+	void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
+	void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
+	int  (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
+	unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
+
+	void (*dev_config)(struct ata_device *dev);
+
+	void (*freeze)(struct ata_port *ap);
+	void (*thaw)(struct ata_port *ap);
+	ata_prereset_fn_t	prereset;
+	ata_reset_fn_t		softreset;
+	ata_reset_fn_t		hardreset;
+	ata_postreset_fn_t	postreset;
+	ata_prereset_fn_t	pmp_prereset;
+	ata_reset_fn_t		pmp_softreset;
+	ata_reset_fn_t		pmp_hardreset;
+	ata_postreset_fn_t	pmp_postreset;
+	void (*error_handler)(struct ata_port *ap);
+	void (*lost_interrupt)(struct ata_port *ap);
+	void (*post_internal_cmd)(struct ata_queued_cmd *qc);
+	void (*sched_eh)(struct ata_port *ap);
+	void (*end_eh)(struct ata_port *ap);
+
+	/*
+	 * Optional features
+	 */
+	int  (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
+	int  (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
+	void (*pmp_attach)(struct ata_port *ap);
+	void (*pmp_detach)(struct ata_port *ap);
+	int  (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
+			unsigned hints);
+
+	/*
+	 * Start, stop, suspend and resume
+	 */
+	int  (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
+	int  (*port_resume)(struct ata_port *ap);
+	int  (*port_start)(struct ata_port *ap);
+	void (*port_stop)(struct ata_port *ap);
+	void (*host_stop)(struct ata_host *host);
+
+#ifdef CONFIG_ATA_SFF
+	/*
+	 * SFF / taskfile oriented ops
+	 */
+	void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
+	void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
+	u8   (*sff_check_status)(struct ata_port *ap);
+	u8   (*sff_check_altstatus)(struct ata_port *ap);
+	void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
+	void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
+	void (*sff_exec_command)(struct ata_port *ap,
+				 const struct ata_taskfile *tf);
+	unsigned int (*sff_data_xfer)(struct ata_device *dev,
+			unsigned char *buf, unsigned int buflen, int rw);
+	void (*sff_irq_on)(struct ata_port *);
+	bool (*sff_irq_check)(struct ata_port *);
+	void (*sff_irq_clear)(struct ata_port *);
+	void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
+
+#ifdef CONFIG_ATA_BMDMA
+	void (*bmdma_setup)(struct ata_queued_cmd *qc);
+	void (*bmdma_start)(struct ata_queued_cmd *qc);
+	void (*bmdma_stop)(struct ata_queued_cmd *qc);
+	u8   (*bmdma_status)(struct ata_port *ap);
+#endif /* CONFIG_ATA_BMDMA */
+#endif /* CONFIG_ATA_SFF */
+
+	ssize_t (*em_show)(struct ata_port *ap, char *buf);
+	ssize_t (*em_store)(struct ata_port *ap, const char *message,
+			    size_t size);
+	ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
+	ssize_t (*sw_activity_store)(struct ata_device *dev,
+				     enum sw_activity val);
+	ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
+					ssize_t size);
+
+	/*
+	 * Obsolete
+	 */
+	void (*phy_reset)(struct ata_port *ap);
+	void (*eng_timeout)(struct ata_port *ap);
+
+	/*
+	 * ->inherits must be the last field and all the preceding
+	 * fields must be pointers.
+	 */
+	const struct ata_port_operations	*inherits;
+};
+
+struct ata_port_info {
+	unsigned long		flags;
+	unsigned long		link_flags;
+	unsigned long		pio_mask;
+	unsigned long		mwdma_mask;
+	unsigned long		udma_mask;
+	struct ata_port_operations *port_ops;
+	void 			*private_data;
+};
+
+struct ata_timing {
+	unsigned short mode;		/* ATA mode */
+	unsigned short setup;		/* t1 */
+	unsigned short act8b;		/* t2 for 8-bit I/O */
+	unsigned short rec8b;		/* t2i for 8-bit I/O */
+	unsigned short cyc8b;		/* t0 for 8-bit I/O */
+	unsigned short active;		/* t2 or tD */
+	unsigned short recover;		/* t2i or tK */
+	unsigned short dmack_hold;	/* tj */
+	unsigned short cycle;		/* t0 */
+	unsigned short udma;		/* t2CYCTYP/2 */
+};
+
+/*
+ * Core layer - drivers/ata/libata-core.c
+ */
+extern const unsigned long sata_deb_timing_normal[];
+extern const unsigned long sata_deb_timing_hotplug[];
+extern const unsigned long sata_deb_timing_long[];
+
+extern struct ata_port_operations ata_dummy_port_ops;
+extern const struct ata_port_info ata_dummy_port_info;
+
+/*
+ * protocol tests
+ */
+static inline unsigned int ata_prot_flags(u8 prot)
+{
+	switch (prot) {
+	case ATA_PROT_NODATA:
+		return 0;
+	case ATA_PROT_PIO:
+		return ATA_PROT_FLAG_PIO;
+	case ATA_PROT_DMA:
+		return ATA_PROT_FLAG_DMA;
+	case ATA_PROT_NCQ:
+		return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
+	case ATAPI_PROT_NODATA:
+		return ATA_PROT_FLAG_ATAPI;
+	case ATAPI_PROT_PIO:
+		return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
+	case ATAPI_PROT_DMA:
+		return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
+	}
+	return 0;
+}
+
+static inline int ata_is_atapi(u8 prot)
+{
+	return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
+}
+
+static inline int ata_is_nodata(u8 prot)
+{
+	return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
+}
+
+static inline int ata_is_pio(u8 prot)
+{
+	return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
+}
+
+static inline int ata_is_dma(u8 prot)
+{
+	return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
+}
+
+static inline int ata_is_ncq(u8 prot)
+{
+	return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
+}
+
+static inline int ata_is_data(u8 prot)
+{
+	return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
+}
+
+static inline int is_multi_taskfile(struct ata_taskfile *tf)
+{
+	return (tf->command == ATA_CMD_READ_MULTI) ||
+	       (tf->command == ATA_CMD_WRITE_MULTI) ||
+	       (tf->command == ATA_CMD_READ_MULTI_EXT) ||
+	       (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
+	       (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
+}
+
+static inline const unsigned long *
+sata_ehc_deb_timing(struct ata_eh_context *ehc)
+{
+	if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
+		return sata_deb_timing_hotplug;
+	else
+		return sata_deb_timing_normal;
+}
+
+static inline int ata_port_is_dummy(struct ata_port *ap)
+{
+	return ap->ops == &ata_dummy_port_ops;
+}
+
+extern int sata_set_spd(struct ata_link *link);
+extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
+extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
+				int (*check_ready)(struct ata_link *link));
+extern int sata_link_debounce(struct ata_link *link,
+			const unsigned long *params, unsigned long deadline);
+extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
+			    unsigned long deadline);
+extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+			     bool spm_wakeup);
+extern int sata_link_hardreset(struct ata_link *link,
+			const unsigned long *timing, unsigned long deadline,
+			bool *online, int (*check_ready)(struct ata_link *));
+extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
+			      unsigned long deadline);
+extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
+
+extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
+extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
+			const struct ata_port_info * const * ppi, int n_ports);
+extern int ata_slave_link_init(struct ata_port *ap);
+extern int ata_host_start(struct ata_host *host);
+extern int ata_host_register(struct ata_host *host,
+			     struct scsi_host_template *sht);
+extern int ata_host_activate(struct ata_host *host, int irq,
+			     irq_handler_t irq_handler, unsigned long irq_flags,
+			     struct scsi_host_template *sht);
+extern void ata_host_detach(struct ata_host *host);
+extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
+extern int ata_scsi_detect(struct scsi_host_template *sht);
+extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
+extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
+extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
+			    int cmd, void __user *arg);
+extern void ata_sas_port_destroy(struct ata_port *);
+extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
+					   struct ata_port_info *, struct Scsi_Host *);
+extern void ata_sas_async_probe(struct ata_port *ap);
+extern int ata_sas_sync_probe(struct ata_port *ap);
+extern int ata_sas_port_init(struct ata_port *);
+extern int ata_sas_port_start(struct ata_port *ap);
+extern void ata_sas_port_stop(struct ata_port *ap);
+extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
+extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
+extern int sata_scr_valid(struct ata_link *link);
+extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
+extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
+extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
+extern bool ata_link_online(struct ata_link *link);
+extern bool ata_link_offline(struct ata_link *link);
+#ifdef CONFIG_PM
+extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
+extern void ata_host_resume(struct ata_host *host);
+extern void ata_sas_port_suspend(struct ata_port *ap);
+extern void ata_sas_port_resume(struct ata_port *ap);
+#else
+static inline void ata_sas_port_suspend(struct ata_port *ap)
+{
+}
+static inline void ata_sas_port_resume(struct ata_port *ap)
+{
+}
+#endif
+extern int ata_ratelimit(void);
+extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
+extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
+			u32 val, unsigned long interval, unsigned long timeout);
+extern int atapi_cmd_type(u8 opcode);
+extern void ata_tf_to_fis(const struct ata_taskfile *tf,
+			  u8 pmp, int is_cmd, u8 *fis);
+extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
+extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
+			unsigned long mwdma_mask, unsigned long udma_mask);
+extern void ata_unpack_xfermask(unsigned long xfer_mask,
+			unsigned long *pio_mask, unsigned long *mwdma_mask,
+			unsigned long *udma_mask);
+extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
+extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
+extern int ata_xfer_mode2shift(unsigned long xfer_mode);
+extern const char *ata_mode_string(unsigned long xfer_mask);
+extern unsigned long ata_id_xfermask(const u16 *id);
+extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
+extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
+extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
+		 unsigned int n_elem);
+extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
+extern void ata_dev_disable(struct ata_device *adev);
+extern void ata_id_string(const u16 *id, unsigned char *s,
+			  unsigned int ofs, unsigned int len);
+extern void ata_id_c_string(const u16 *id, unsigned char *s,
+			    unsigned int ofs, unsigned int len);
+extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
+					struct ata_taskfile *tf, u16 *id);
+extern void ata_qc_complete(struct ata_queued_cmd *qc);
+extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
+extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
+extern int ata_std_bios_param(struct scsi_device *sdev,
+			      struct block_device *bdev,
+			      sector_t capacity, int geom[]);
+extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
+extern int ata_scsi_slave_config(struct scsi_device *sdev);
+extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
+extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
+				       int queue_depth);
+extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
+				    int queue_depth);
+extern struct ata_device *ata_dev_pair(struct ata_device *adev);
+extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
+extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
+extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
+extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
+
+extern int ata_cable_40wire(struct ata_port *ap);
+extern int ata_cable_80wire(struct ata_port *ap);
+extern int ata_cable_sata(struct ata_port *ap);
+extern int ata_cable_ignore(struct ata_port *ap);
+extern int ata_cable_unknown(struct ata_port *ap);
+
+/* Timing helpers */
+extern unsigned int ata_pio_need_iordy(const struct ata_device *);
+extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
+extern int ata_timing_compute(struct ata_device *, unsigned short,
+			      struct ata_timing *, int, int);
+extern void ata_timing_merge(const struct ata_timing *,
+			     const struct ata_timing *, struct ata_timing *,
+			     unsigned int);
+extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
+
+/* PCI */
+#ifdef CONFIG_PCI
+struct pci_dev;
+
+struct pci_bits {
+	unsigned int		reg;	/* PCI config register to read */
+	unsigned int		width;	/* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
+	unsigned long		mask;
+	unsigned long		val;
+};
+
+extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
+extern void ata_pci_remove_one(struct pci_dev *pdev);
+
+#ifdef CONFIG_PM
+extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
+extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
+extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
+extern int ata_pci_device_resume(struct pci_dev *pdev);
+#endif /* CONFIG_PM */
+#endif /* CONFIG_PCI */
+
+struct platform_device;
+
+extern int ata_platform_remove_one(struct platform_device *pdev);
+
+/*
+ * ACPI - drivers/ata/libata-acpi.c
+ */
+#ifdef CONFIG_ATA_ACPI
+static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
+{
+	if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
+		return &ap->__acpi_init_gtm;
+	return NULL;
+}
+int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
+int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
+unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
+				    const struct ata_acpi_gtm *gtm);
+int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
+#else
+static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
+{
+	return NULL;
+}
+
+static inline int ata_acpi_stm(const struct ata_port *ap,
+			       struct ata_acpi_gtm *stm)
+{
+	return -ENOSYS;
+}
+
+static inline int ata_acpi_gtm(const struct ata_port *ap,
+			       struct ata_acpi_gtm *stm)
+{
+	return -ENOSYS;
+}
+
+static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
+					const struct ata_acpi_gtm *gtm)
+{
+	return 0;
+}
+
+static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
+				      const struct ata_acpi_gtm *gtm)
+{
+	return 0;
+}
+#endif
+
+/*
+ * EH - drivers/ata/libata-eh.c
+ */
+extern void ata_port_schedule_eh(struct ata_port *ap);
+extern void ata_port_wait_eh(struct ata_port *ap);
+extern int ata_link_abort(struct ata_link *link);
+extern int ata_port_abort(struct ata_port *ap);
+extern int ata_port_freeze(struct ata_port *ap);
+extern int sata_async_notification(struct ata_port *ap);
+
+extern void ata_eh_freeze_port(struct ata_port *ap);
+extern void ata_eh_thaw_port(struct ata_port *ap);
+
+extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
+extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
+extern void ata_eh_analyze_ncq_error(struct ata_link *link);
+
+extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
+		      ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+		      ata_postreset_fn_t postreset);
+extern void ata_std_error_handler(struct ata_port *ap);
+extern void ata_std_sched_eh(struct ata_port *ap);
+extern void ata_std_end_eh(struct ata_port *ap);
+extern int ata_link_nr_enabled(struct ata_link *link);
+
+/*
+ * Base operations to inherit from and initializers for sht
+ *
+ * Operations
+ *
+ * base  : Common to all libata drivers.
+ * sata  : SATA controllers w/ native interface.
+ * pmp   : SATA controllers w/ PMP support.
+ * sff   : SFF ATA controllers w/o BMDMA support.
+ * bmdma : SFF ATA controllers w/ BMDMA support.
+ *
+ * sht initializers
+ *
+ * BASE  : Common to all libata drivers.  The user must set
+ *	   sg_tablesize and dma_boundary.
+ * PIO   : SFF ATA controllers w/ only PIO support.
+ * BMDMA : SFF ATA controllers w/ BMDMA support.  sg_tablesize and
+ *	   dma_boundary are set to BMDMA limits.
+ * NCQ   : SATA controllers supporting NCQ.  The user must set
+ *	   sg_tablesize, dma_boundary and can_queue.
+ */
+extern const struct ata_port_operations ata_base_port_ops;
+extern const struct ata_port_operations sata_port_ops;
+extern struct device_attribute *ata_common_sdev_attrs[];
+
+/*
+ * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
+ * by the edge drivers.  Because the 'module' field of sht must be the
+ * edge driver's module reference, otherwise the driver can be unloaded
+ * even if the scsi_device is being accessed.
+ */
+#define ATA_BASE_SHT(drv_name)					\
+	.module			= THIS_MODULE,			\
+	.name			= drv_name,			\
+	.ioctl			= ata_scsi_ioctl,		\
+	.queuecommand		= ata_scsi_queuecmd,		\
+	.can_queue		= ATA_DEF_QUEUE,		\
+	.tag_alloc_policy	= BLK_TAG_ALLOC_RR,		\
+	.this_id		= ATA_SHT_THIS_ID,		\
+	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,		\
+	.emulated		= ATA_SHT_EMULATED,		\
+	.use_clustering		= ATA_SHT_USE_CLUSTERING,	\
+	.proc_name		= drv_name,			\
+	.slave_configure	= ata_scsi_slave_config,	\
+	.slave_destroy		= ata_scsi_slave_destroy,	\
+	.bios_param		= ata_std_bios_param,		\
+	.unlock_native_capacity	= ata_scsi_unlock_native_capacity, \
+	.sdev_attrs		= ata_common_sdev_attrs
+
+#define ATA_NCQ_SHT(drv_name)					\
+	ATA_BASE_SHT(drv_name),					\
+	.change_queue_depth	= ata_scsi_change_queue_depth
+
+/*
+ * PMP helpers
+ */
+#ifdef CONFIG_SATA_PMP
+static inline bool sata_pmp_supported(struct ata_port *ap)
+{
+	return ap->flags & ATA_FLAG_PMP;
+}
+
+static inline bool sata_pmp_attached(struct ata_port *ap)
+{
+	return ap->nr_pmp_links != 0;
+}
+
+static inline int ata_is_host_link(const struct ata_link *link)
+{
+	return link == &link->ap->link || link == link->ap->slave_link;
+}
+#else /* CONFIG_SATA_PMP */
+static inline bool sata_pmp_supported(struct ata_port *ap)
+{
+	return false;
+}
+
+static inline bool sata_pmp_attached(struct ata_port *ap)
+{
+	return false;
+}
+
+static inline int ata_is_host_link(const struct ata_link *link)
+{
+	return 1;
+}
+#endif /* CONFIG_SATA_PMP */
+
+static inline int sata_srst_pmp(struct ata_link *link)
+{
+	if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
+		return SATA_PMP_CTRL_PORT;
+	return link->pmp;
+}
+
+/*
+ * printk helpers
+ */
+__printf(3, 4)
+void ata_port_printk(const struct ata_port *ap, const char *level,
+		     const char *fmt, ...);
+__printf(3, 4)
+void ata_link_printk(const struct ata_link *link, const char *level,
+		     const char *fmt, ...);
+__printf(3, 4)
+void ata_dev_printk(const struct ata_device *dev, const char *level,
+		    const char *fmt, ...);
+
+#define ata_port_err(ap, fmt, ...)				\
+	ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
+#define ata_port_warn(ap, fmt, ...)				\
+	ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
+#define ata_port_notice(ap, fmt, ...)				\
+	ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
+#define ata_port_info(ap, fmt, ...)				\
+	ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
+#define ata_port_dbg(ap, fmt, ...)				\
+	ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
+
+#define ata_link_err(link, fmt, ...)				\
+	ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
+#define ata_link_warn(link, fmt, ...)				\
+	ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
+#define ata_link_notice(link, fmt, ...)				\
+	ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
+#define ata_link_info(link, fmt, ...)				\
+	ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
+#define ata_link_dbg(link, fmt, ...)				\
+	ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
+
+#define ata_dev_err(dev, fmt, ...)				\
+	ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
+#define ata_dev_warn(dev, fmt, ...)				\
+	ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
+#define ata_dev_notice(dev, fmt, ...)				\
+	ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
+#define ata_dev_info(dev, fmt, ...)				\
+	ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
+#define ata_dev_dbg(dev, fmt, ...)				\
+	ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
+
+void ata_print_version(const struct device *dev, const char *version);
+
+/*
+ * ata_eh_info helpers
+ */
+extern __printf(2, 3)
+void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
+extern __printf(2, 3)
+void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
+extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
+
+static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
+{
+	ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
+	ehi->flags |= ATA_EHI_HOTPLUGGED;
+	ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
+	ehi->err_mask |= AC_ERR_ATA_BUS;
+}
+
+/*
+ * port description helpers
+ */
+extern __printf(2, 3)
+void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
+#ifdef CONFIG_PCI
+extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
+			       const char *name);
+#endif
+
+static inline unsigned int ata_tag_valid(unsigned int tag)
+{
+	return (tag < ATA_MAX_QUEUE) ? 1 : 0;
+}
+
+static inline unsigned int ata_tag_internal(unsigned int tag)
+{
+	return tag == ATA_TAG_INTERNAL;
+}
+
+/*
+ * device helpers
+ */
+static inline unsigned int ata_class_enabled(unsigned int class)
+{
+	return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
+		class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
+		class == ATA_DEV_ZAC;
+}
+
+static inline unsigned int ata_class_disabled(unsigned int class)
+{
+	return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
+		class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
+}
+
+static inline unsigned int ata_class_absent(unsigned int class)
+{
+	return !ata_class_enabled(class) && !ata_class_disabled(class);
+}
+
+static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
+{
+	return ata_class_enabled(dev->class);
+}
+
+static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
+{
+	return ata_class_disabled(dev->class);
+}
+
+static inline unsigned int ata_dev_absent(const struct ata_device *dev)
+{
+	return ata_class_absent(dev->class);
+}
+
+/*
+ * link helpers
+ */
+static inline int ata_link_max_devices(const struct ata_link *link)
+{
+	if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
+		return 2;
+	return 1;
+}
+
+static inline int ata_link_active(struct ata_link *link)
+{
+	return ata_tag_valid(link->active_tag) || link->sactive;
+}
+
+/*
+ * Iterators
+ *
+ * ATA_LITER_* constants are used to select link iteration mode and
+ * ATA_DITER_* device iteration mode.
+ *
+ * For a custom iteration directly using ata_{link|dev}_next(), if
+ * @link or @dev, respectively, is NULL, the first element is
+ * returned.  @dev and @link can be any valid device or link and the
+ * next element according to the iteration mode will be returned.
+ * After the last element, NULL is returned.
+ */
+enum ata_link_iter_mode {
+	ATA_LITER_EDGE,		/* if present, PMP links only; otherwise,
+				 * host link.  no slave link */
+	ATA_LITER_HOST_FIRST,	/* host link followed by PMP or slave links */
+	ATA_LITER_PMP_FIRST,	/* PMP links followed by host link,
+				 * slave link still comes after host link */
+};
+
+enum ata_dev_iter_mode {
+	ATA_DITER_ENABLED,
+	ATA_DITER_ENABLED_REVERSE,
+	ATA_DITER_ALL,
+	ATA_DITER_ALL_REVERSE,
+};
+
+extern struct ata_link *ata_link_next(struct ata_link *link,
+				      struct ata_port *ap,
+				      enum ata_link_iter_mode mode);
+
+extern struct ata_device *ata_dev_next(struct ata_device *dev,
+				       struct ata_link *link,
+				       enum ata_dev_iter_mode mode);
+
+/*
+ * Shortcut notation for iterations
+ *
+ * ata_for_each_link() iterates over each link of @ap according to
+ * @mode.  @link points to the current link in the loop.  @link is
+ * NULL after loop termination.  ata_for_each_dev() works the same way
+ * except that it iterates over each device of @link.
+ *
+ * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
+ * specified when using the following shorthand notations.  Only the
+ * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
+ * specified.  This not only increases brevity but also makes it
+ * impossible to use ATA_LITER_* for device iteration or vice-versa.
+ */
+#define ata_for_each_link(link, ap, mode) \
+	for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
+	     (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
+
+#define ata_for_each_dev(dev, link, mode) \
+	for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
+	     (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
+
+/**
+ *	ata_ncq_enabled - Test whether NCQ is enabled
+ *	@dev: ATA device to test for
+ *
+ *	LOCKING:
+ *	spin_lock_irqsave(host lock)
+ *
+ *	RETURNS:
+ *	1 if NCQ is enabled for @dev, 0 otherwise.
+ */
+static inline int ata_ncq_enabled(struct ata_device *dev)
+{
+	return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
+			      ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
+}
+
+static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
+{
+	return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
+		(dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
+		 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
+}
+
+static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
+{
+	qc->tf.ctl |= ATA_NIEN;
+}
+
+static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
+						       unsigned int tag)
+{
+	if (likely(ata_tag_valid(tag)))
+		return &ap->qcmd[tag];
+	return NULL;
+}
+
+static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
+						     unsigned int tag)
+{
+	struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
+
+	if (unlikely(!qc) || !ap->ops->error_handler)
+		return qc;
+
+	if ((qc->flags & (ATA_QCFLAG_ACTIVE |
+			  ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
+		return qc;
+
+	return NULL;
+}
+
+static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
+{
+	return qc->nbytes - min(qc->extrabytes, qc->nbytes);
+}
+
+static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
+{
+	memset(tf, 0, sizeof(*tf));
+
+#ifdef CONFIG_ATA_SFF
+	tf->ctl = dev->link->ap->ctl;
+#else
+	tf->ctl = ATA_DEVCTL_OBS;
+#endif
+	if (dev->devno == 0)
+		tf->device = ATA_DEVICE_OBS;
+	else
+		tf->device = ATA_DEVICE_OBS | ATA_DEV1;
+}
+
+static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
+{
+	qc->dma_dir = DMA_NONE;
+	qc->sg = NULL;
+	qc->flags = 0;
+	qc->cursg = NULL;
+	qc->cursg_ofs = 0;
+	qc->nbytes = qc->extrabytes = qc->curbytes = 0;
+	qc->n_elem = 0;
+	qc->err_mask = 0;
+	qc->sect_size = ATA_SECT_SIZE;
+
+	ata_tf_init(qc->dev, &qc->tf);
+
+	/* init result_tf such that it indicates normal completion */
+	qc->result_tf.command = ATA_DRDY;
+	qc->result_tf.feature = 0;
+}
+
+static inline int ata_try_flush_cache(const struct ata_device *dev)
+{
+	return ata_id_wcache_enabled(dev->id) ||
+	       ata_id_has_flush(dev->id) ||
+	       ata_id_has_flush_ext(dev->id);
+}
+
+static inline unsigned int ac_err_mask(u8 status)
+{
+	if (status & (ATA_BUSY | ATA_DRQ))
+		return AC_ERR_HSM;
+	if (status & (ATA_ERR | ATA_DF))
+		return AC_ERR_DEV;
+	return 0;
+}
+
+static inline unsigned int __ac_err_mask(u8 status)
+{
+	unsigned int mask = ac_err_mask(status);
+	if (mask == 0)
+		return AC_ERR_OTHER;
+	return mask;
+}
+
+static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
+{
+	return *(struct ata_port **)&host->hostdata[0];
+}
+
+static inline int ata_check_ready(u8 status)
+{
+	if (!(status & ATA_BUSY))
+		return 1;
+
+	/* 0xff indicates either no device or device not ready */
+	if (status == 0xff)
+		return -ENODEV;
+
+	return 0;
+}
+
+static inline unsigned long ata_deadline(unsigned long from_jiffies,
+					 unsigned long timeout_msecs)
+{
+	return from_jiffies + msecs_to_jiffies(timeout_msecs);
+}
+
+/* Don't open code these in drivers as there are traps. Firstly the range may
+   change in future hardware and specs, secondly 0xFF means 'no DMA' but is
+   > UDMA_0. Dyma ddreigiau */
+
+static inline int ata_using_mwdma(struct ata_device *adev)
+{
+	if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
+		return 1;
+	return 0;
+}
+
+static inline int ata_using_udma(struct ata_device *adev)
+{
+	if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
+		return 1;
+	return 0;
+}
+
+static inline int ata_dma_enabled(struct ata_device *adev)
+{
+	return (adev->dma_mode == 0xFF ? 0 : 1);
+}
+
+/**************************************************************************
+ * PMP - drivers/ata/libata-pmp.c
+ */
+#ifdef CONFIG_SATA_PMP
+
+extern const struct ata_port_operations sata_pmp_port_ops;
+
+extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
+extern void sata_pmp_error_handler(struct ata_port *ap);
+
+#else /* CONFIG_SATA_PMP */
+
+#define sata_pmp_port_ops		sata_port_ops
+#define sata_pmp_qc_defer_cmd_switch	ata_std_qc_defer
+#define sata_pmp_error_handler		ata_std_error_handler
+
+#endif /* CONFIG_SATA_PMP */
+
+
+/**************************************************************************
+ * SFF - drivers/ata/libata-sff.c
+ */
+#ifdef CONFIG_ATA_SFF
+
+extern const struct ata_port_operations ata_sff_port_ops;
+extern const struct ata_port_operations ata_bmdma32_port_ops;
+
+/* PIO only, sg_tablesize and dma_boundary limits can be removed */
+#define ATA_PIO_SHT(drv_name)					\
+	ATA_BASE_SHT(drv_name),					\
+	.sg_tablesize		= LIBATA_MAX_PRD,		\
+	.dma_boundary		= ATA_DMA_BOUNDARY
+
+extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
+extern u8 ata_sff_check_status(struct ata_port *ap);
+extern void ata_sff_pause(struct ata_port *ap);
+extern void ata_sff_dma_pause(struct ata_port *ap);
+extern int ata_sff_busy_sleep(struct ata_port *ap,
+			      unsigned long timeout_pat, unsigned long timeout);
+extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
+extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
+extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
+extern void ata_sff_exec_command(struct ata_port *ap,
+				 const struct ata_taskfile *tf);
+extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
+			unsigned char *buf, unsigned int buflen, int rw);
+extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
+			unsigned char *buf, unsigned int buflen, int rw);
+extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
+			unsigned char *buf, unsigned int buflen, int rw);
+extern void ata_sff_irq_on(struct ata_port *ap);
+extern void ata_sff_irq_clear(struct ata_port *ap);
+extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
+			    u8 status, int in_wq);
+extern void ata_sff_queue_work(struct work_struct *work);
+extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
+		unsigned long delay);
+extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
+extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
+extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
+extern unsigned int ata_sff_port_intr(struct ata_port *ap,
+				      struct ata_queued_cmd *qc);
+extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
+extern void ata_sff_lost_interrupt(struct ata_port *ap);
+extern void ata_sff_freeze(struct ata_port *ap);
+extern void ata_sff_thaw(struct ata_port *ap);
+extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
+extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
+					  u8 *r_err);
+extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
+				    unsigned long deadline);
+extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
+			     unsigned long deadline);
+extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
+			       unsigned long deadline);
+extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
+extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
+extern void ata_sff_error_handler(struct ata_port *ap);
+extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
+#ifdef CONFIG_PCI
+extern int ata_pci_sff_init_host(struct ata_host *host);
+extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
+				    const struct ata_port_info * const * ppi,
+				    struct ata_host **r_host);
+extern int ata_pci_sff_activate_host(struct ata_host *host,
+				     irq_handler_t irq_handler,
+				     struct scsi_host_template *sht);
+extern int ata_pci_sff_init_one(struct pci_dev *pdev,
+		const struct ata_port_info * const * ppi,
+		struct scsi_host_template *sht, void *host_priv, int hflags);
+#endif /* CONFIG_PCI */
+
+#ifdef CONFIG_ATA_BMDMA
+
+extern const struct ata_port_operations ata_bmdma_port_ops;
+
+#define ATA_BMDMA_SHT(drv_name)					\
+	ATA_BASE_SHT(drv_name),					\
+	.sg_tablesize		= LIBATA_MAX_PRD,		\
+	.dma_boundary		= ATA_DMA_BOUNDARY
+
+extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
+extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
+extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
+extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
+				      struct ata_queued_cmd *qc);
+extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
+extern void ata_bmdma_error_handler(struct ata_port *ap);
+extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
+extern void ata_bmdma_irq_clear(struct ata_port *ap);
+extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
+extern void ata_bmdma_start(struct ata_queued_cmd *qc);
+extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
+extern u8 ata_bmdma_status(struct ata_port *ap);
+extern int ata_bmdma_port_start(struct ata_port *ap);
+extern int ata_bmdma_port_start32(struct ata_port *ap);
+
+#ifdef CONFIG_PCI
+extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
+extern void ata_pci_bmdma_init(struct ata_host *host);
+extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
+				      const struct ata_port_info * const * ppi,
+				      struct ata_host **r_host);
+extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
+				  const struct ata_port_info * const * ppi,
+				  struct scsi_host_template *sht,
+				  void *host_priv, int hflags);
+#endif /* CONFIG_PCI */
+#endif /* CONFIG_ATA_BMDMA */
+
+/**
+ *	ata_sff_busy_wait - Wait for a port status register
+ *	@ap: Port to wait for.
+ *	@bits: bits that must be clear
+ *	@max: number of 10uS waits to perform
+ *
+ *	Waits up to max*10 microseconds for the selected bits in the port's
+ *	status register to be cleared.
+ *	Returns final value of status register.
+ *
+ *	LOCKING:
+ *	Inherited from caller.
+ */
+static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
+				   unsigned int max)
+{
+	u8 status;
+
+	do {
+		udelay(10);
+		status = ap->ops->sff_check_status(ap);
+		max--;
+	} while (status != 0xff && (status & bits) && (max > 0));
+
+	return status;
+}
+
+/**
+ *	ata_wait_idle - Wait for a port to be idle.
+ *	@ap: Port to wait for.
+ *
+ *	Waits up to 10ms for port's BUSY and DRQ signals to clear.
+ *	Returns final value of status register.
+ *
+ *	LOCKING:
+ *	Inherited from caller.
+ */
+static inline u8 ata_wait_idle(struct ata_port *ap)
+{
+	u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
+
+#ifdef ATA_DEBUG
+	if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
+		ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
+				status);
+#endif
+
+	return status;
+}
+#endif /* CONFIG_ATA_SFF */
+
+#endif /* __LINUX_LIBATA_H__ */