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remarkable-linux/include/linux/libata.h
Tejun Heo 445d211b0d libata: unlock HPA if device shrunk 
Some BIOSes don't configure HPA during boot but do so while resuming.
This causes harddrives to shrink during resume making libata detach
and reattach them.  This can be worked around by unlocking HPA if old
size equals native size.

Add ATA_DFLAG_UNLOCK_HPA so that HPA unlocking can be controlled
per-device and update ata_dev_revalidate() such that it sets
ATA_DFLAG_UNLOCK_HPA and fails with -EIO when the above condition is
detected.

This patch fixes the following bug.

  https://bugzilla.kernel.org/show_bug.cgi?id=15396

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Oleksandr Yermolenko <yaa.bta@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-04-06 10:55:33 -04:00

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/*
* 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>
/*
* 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)
/* 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_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_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_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_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 */
/* 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_LEGACY = (1 << 2), /* no legacy mode check */
ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
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_IPM = (1 << 20), /* driver can handle IPM */
ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
* management */
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
* led */
/* The following flag belongs to ap->pflags but is kept in
* ap->flags because it's referenced in many LLDs and will be
* removed in not-too-distant future.
*/
ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
/* 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 */
/* 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,
/* FIXME: GoVault needs 2s but we can't afford that without
* parallel probing. 800ms is enough for iVDR disk
* HHD424020F7SV00. Increase to 2secs when parallel probing
* is in place.
*/
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,
/* 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_LPM = (1 << 4), /* link power management action */
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_LPM,
/* 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_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), /* revaildating 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 dependant */
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_IPM = (1 << 7), /* Link PM problems */
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 */
/* 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 */
};
/* 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);
/*
* host pm policy: If you alter this, you also need to alter libata-scsi.c
* (for the ascii descriptions)
*/
enum link_pm {
NOT_AVAILABLE,
MIN_POWER,
MAX_PERFORMANCE,
MEDIUM_POWER,
};
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,
};
#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;
void __iomem *bmdma_addr;
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;
void *private_data;
struct ata_port_operations *ops;
unsigned long flags;
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
#endif
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 *cursg;
unsigned int cursg_ofs;
struct scatterlist sgent;
struct scatterlist *sg;
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
acpi_handle acpi_handle;
union acpi_object *gtf_cache;
unsigned int gtf_filter;
#endif
/* 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 */
};
/* error history */
int spdn_cnt;
/* ering is CLEAR_END, read comment above CLEAR_END */
struct ata_ering ering;
};
/* 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 # */
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 */
/* 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];
};
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 port_no; /* 0 based port no. inside the host */
struct ata_prd *prd; /* our SG list */
dma_addr_t prd_dma; /* and its DMA mapping */
#ifdef CONFIG_ATA_SFF
struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
#endif /* CONFIG_ATA_SFF */
u8 ctl; /* cache of ATA control register */
u8 last_ctl; /* Cache last written value */
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 qc_allocated;
unsigned int qc_active;
int nr_active_links; /* #links with active qcs */
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;
void *port_task_data;
struct delayed_work port_task;
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;
int *pm_result;
enum link_pm pm_policy;
struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
int em_message_type;
void *private_data;
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
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);
/*
* 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 (*enable_pm)(struct ata_port *ap, enum link_pm policy);
void (*disable_pm)(struct ata_port *ap);
/*
* 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);
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);
u8 (*sff_irq_on)(struct ata_port *);
bool (*sff_irq_check)(struct ata_port *);
void (*sff_irq_clear)(struct ata_port *);
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);
void (*drain_fifo)(struct ata_queued_cmd *qc);
#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);
/*
* 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;
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 void ata_port_probe(struct ata_port *);
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_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 void ata_port_disable(struct ata_port *);
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 *,
unsigned long, 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_cmnd *cmd, void (*done)(struct scsi_cmnd *));
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 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, void (*done)(struct scsi_cmnd *),
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);
#endif
extern int ata_ratelimit(void);
extern u32 ata_wait_register(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_port_start(struct ata_port *ap);
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,
void (*done)(struct scsi_cmnd *));
extern int ata_std_bios_param(struct scsi_device *sdev,
struct block_device *bdev,
sector_t capacity, int geom[]);
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, int reason);
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 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);
extern void ata_pio_queue_task(struct ata_port *ap, void *data,
unsigned long delay);
/* 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 */
/*
* 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 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);
/*
* 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[];
#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, \
.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, \
.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
*/
#define ata_port_printk(ap, lv, fmt, args...) \
printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
#define ata_link_printk(link, lv, fmt, args...) do { \
if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
(link)->pmp , ##args); \
else \
printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
} while(0)
#define ata_dev_printk(dev, lv, fmt, args...) \
printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
(dev)->link->pmp + (dev)->devno , ##args)
/*
* ata_eh_info helpers
*/
extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
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 void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
#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;
}
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 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));
tf->ctl = dev->link->ap->ctl;
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_bmdma_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
#define ATA_BMDMA_SHT(drv_name) \
ATA_BASE_SHT(drv_name), \
.sg_tablesize = LIBATA_MAX_PRD, \
.dma_boundary = ATA_DMA_BOUNDARY
extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
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 u8 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 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_host_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_post_internal_cmd(struct ata_queued_cmd *qc);
extern int ata_sff_port_start(struct ata_port *ap);
extern int ata_sff_port_start32(struct ata_port *ap);
extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
unsigned long xfer_mask);
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 void ata_bus_reset(struct ata_port *ap);
#ifdef CONFIG_PCI
extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
extern int ata_pci_bmdma_init(struct ata_host *host);
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 */
/**
* 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__ */
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