android_kernel_motorola_sm6225/include/linux/libata.h

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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/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/io.h>
#include <linux/ata.h>
#include <linux/workqueue.h>
2006-04-11 19:12:34 +02:00
#include <scsi/scsi_host.h>
#include <linux/acpi.h>
#include <linux/cdrom.h>
/*
* Define if arch has non-standard setup. This is a _PCI_ standard
* not a legacy or ISA standard.
*/
#ifdef CONFIG_ATA_NONSTANDARD
#include <asm/libata-portmap.h>
#else
#include <asm-generic/libata-portmap.h>
#endif
/*
* compile-time options: to be removed as soon as all the drivers are
* converted to the new debugging mechanism
*/
#undef ATA_DEBUG /* debugging output */
#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
#undef ATA_NDEBUG /* define to disable quick runtime checks */
/* note: prints function name for you */
#ifdef ATA_DEBUG
#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#ifdef ATA_VERBOSE_DEBUG
#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#else
#define VPRINTK(fmt, args...)
#endif /* ATA_VERBOSE_DEBUG */
#else
#define DPRINTK(fmt, args...)
#define VPRINTK(fmt, args...)
#endif /* ATA_DEBUG */
#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
/* NEW: debug levels */
#define HAVE_LIBATA_MSG 1
enum {
ATA_MSG_DRV = 0x0001,
ATA_MSG_INFO = 0x0002,
ATA_MSG_PROBE = 0x0004,
ATA_MSG_WARN = 0x0008,
ATA_MSG_MALLOC = 0x0010,
ATA_MSG_CTL = 0x0020,
ATA_MSG_INTR = 0x0040,
ATA_MSG_ERR = 0x0080,
};
#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
{
if (dval < 0 || dval >= (sizeof(u32) * 8))
return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
if (!dval)
return 0;
return (1 << dval) - 1;
}
/* defines only for the constants which don't work well as enums */
#define ATA_TAG_POISON 0xfafbfcfdU
enum {
/* various global constants */
LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
ATA_MAX_PORTS = 8,
ATA_DEF_QUEUE = 1,
/* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
ATA_MAX_QUEUE = 32,
ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
ATA_MAX_BUS = 2,
ATA_DEF_BUSY_WAIT = 10000,
ATA_SHORT_PAUSE = (HZ >> 6) + 1,
ATAPI_MAX_DRAIN = 16 << 10,
ATA_SHT_EMULATED = 1,
ATA_SHT_CMD_PER_LUN = 1,
ATA_SHT_THIS_ID = -1,
2005-10-22 06:19:33 +02:00
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_CFG_MASK = (1 << 12) - 1,
ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
ATA_DFLAG_DETACH = (1 << 24),
ATA_DFLAG_DETACHED = (1 << 25),
ATA_DEV_UNKNOWN = 0, /* unknown device */
ATA_DEV_ATA = 1, /* ATA device */
ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
ATA_DEV_ATAPI = 3, /* ATAPI device */
ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
ATA_DEV_PMP = 5, /* SATA port multiplier */
ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
ATA_DEV_SEMB = 7, /* SEMB */
ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
ATA_DEV_NONE = 9, /* no device */
/* struct ata_link flags */
ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
* Register FIS clearing BSY */
ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* 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_DEBUGMSG = (1 << 13),
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 */
/* 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_UNLOADING = (1 << 5), /* module is unloading */
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_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 */
/* 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_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 */
2006-08-31 06:02:15 +02:00
/* bits 24:31 of host->flags are reserved for LLD specific flags */
/* various lengths of time */
ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
ATA_TMOUT_INTERNAL = 30 * HZ,
ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
/* 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 = 4 * HZ / 5,
/* 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,
ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
/* 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),
ATA_EH_HARDRESET = (1 << 2),
ATA_EH_ENABLE_LINK = (1 << 3),
ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
/* ata_eh_info->flags */
ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
ATA_EHI_QUIET = (1 << 3), /* be quiet */
ATA_EHI_LPM = (1 << 4), /* link power management action */
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,
ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
/* max tries if error condition is still set after ->error_handler */
ATA_EH_MAX_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_SCR_TIMEOUT = 250,
[PATCH] libata-hp-prep: add prereset() method and implement ata_std_prereset() With hotplug, every reset might be a probing reset and thus something similar to probe_init() is needed. prereset() method is called before a series of resets to a port and is the counterpart of postreset(). prereset() can tell EH to use different type of reset or skip reset by modifying ehc->i.action. This patch also implements ata_std_prereset(). Most controllers should be able to use this function directly or with some wrapping. After hotplug, different controllers need different actions to resume the PHY and detect the newly attached device. Controllers can be categorized as follows. * Controllers which can wait for the first D2H FIS after hotplug. Note that if the waiting is implemented by polling TF status, there needs to be a way to set BSY on PHY status change. It can be implemented by hardware or with the help of the driver. * Controllers which can wait for the first D2H FIS after sending COMRESET. These controllers need to issue COMRESET to wait for the first FIS. Note that the received D2H FIS could be the first D2H FIS after POR (power-on-reset) or D2H FIS in response to the COMRESET. Some controllers use COMRESET as TF status synchronization point and clear TF automatically (sata_sil). * Controllers which cannot wait for the first D2H FIS reliably. Blindly issuing SRST to spinning-up device often results in command issue failure or timeout, causing extended delay. For these controllers, ata_std_prereset() explicitly waits ATA_SPINUP_WAIT (currently 8s) to give newly attached device time to spin up, then issues reset. Note that failing to getting ready in ATA_SPINUP_WAIT is not critical. libata will retry. So, the timeout needs to be long enough to spin up most devices. LLDDs can tell ata_std_prereset() which of above action is needed with ATA_FLAG_HRST_TO_RESUME and ATA_FLAG_SKIP_D2H_BSY flags. These flags are PHY-specific property and will be moved to ata_link later. While at it, this patch unifies function typedef's such that they all have named arguments. Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-05-31 11:27:48 +02:00
/* 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_SKIP_PM = (1 << 5), /* Skip PM operations */
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 */
/* 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_MISC = 3, /* the rest */
};
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,
libata: add deadline support to prereset and reset methods Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 08:50:52 +01:00
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 class_device_attribute class_device_attr_link_power_management_policy;
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;
};
struct ata_host {
spinlock_t lock;
struct device *dev;
void __iomem * const *iomap;
unsigned int n_ports;
void *private_data;
const 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 n_iter;
unsigned int mapped_n_elem;
int dma_dir;
unsigned int pad_len;
unsigned int sect_size;
unsigned int nbytes;
unsigned int raw_nbytes;
unsigned int curbytes;
struct scatterlist *cursg;
unsigned int cursg_ofs;
struct scatterlist *last_sg;
struct scatterlist saved_last_sg;
struct scatterlist sgent;
struct scatterlist extra_sg[2];
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 long flags; /* ATA_DFLAG_xxx */
unsigned int horkage; /* List of broken features */
struct scsi_device *sdev; /* attached SCSI device */
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
union acpi_object *gtf_cache;
#endif
/* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
u64 n_sectors; /* size of device, if ATA */
unsigned int class; /* ATA_DEV_xxx */
union {
u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
};
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 */
/* error history */
struct ata_ering ering;
libata: put some intelligence into EH speed down sequence The current EH speed down code is more of a proof that the EH framework is capable of adjusting transfer speed in response to error. This patch puts some intelligence into EH speed down sequence. The rules are.. * If there have been more than three timeout, HSM violation or unclassified DEV errors for known supported commands during last 10 mins, NCQ is turned off. * If there have been more than three timeout or HSM violation for known supported command, transfer mode is slowed down. If DMA is active, it is first slowered by one grade (e.g. UDMA133->100). If that doesn't help, it's slowered to 40c limit (UDMA33). If PIO is active, it's slowered by one grade first. If that doesn't help, PIO0 is forced. Note that this rule does not change transfer mode. DMA is never degraded into PIO by this rule. * If there have been more than ten ATA bus, timeout, HSM violation or unclassified device errors for known supported commands && speeding down DMA mode didn't help, the device is forced into PIO mode. Note that this rule is considered only for PATA devices and is pretty difficult to trigger. One error can only trigger one rule at a time. After a rule is triggered, error history is cleared such that the next speed down happens only after some number of errors are accumulated. This makes sense because now speed down is done in bigger stride. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 08:22:31 +01:00
int spdn_cnt;
};
/* Offset into struct ata_device. Fields above it are maintained
* acress device init. Fields below are zeroed.
*/
#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
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];
unsigned int classes[ATA_MAX_DEVICES];
unsigned int did_probe_mask;
unsigned int saved_ncq_enabled;
u8 saved_xfer_mode[ATA_MAX_DEVICES];
};
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 */
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 */
const struct ata_port_operations *ops;
spinlock_t *lock;
unsigned long flags; /* ATA_FLAG_xxx */
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 */
void *pad; /* array of DMA pad buffers */
dma_addr_t pad_dma;
struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
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 */
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;
2006-11-22 15:55:48 +01:00
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;
pm_message_t pm_mesg;
int *pm_result;
enum link_pm pm_policy;
struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
void *private_data;
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
#endif
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
};
struct ata_port_operations {
void (*dev_config) (struct ata_device *);
void (*set_piomode) (struct ata_port *, struct ata_device *);
void (*set_dmamode) (struct ata_port *, struct ata_device *);
unsigned long (*mode_filter) (struct ata_device *, unsigned long);
void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
u8 (*check_status)(struct ata_port *ap);
u8 (*check_altstatus)(struct ata_port *ap);
void (*dev_select)(struct ata_port *ap, unsigned int device);
void (*phy_reset) (struct ata_port *ap); /* obsolete */
int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
int (*cable_detect) (struct ata_port *ap);
int (*check_atapi_dma) (struct ata_queued_cmd *qc);
void (*bmdma_setup) (struct ata_queued_cmd *qc);
void (*bmdma_start) (struct ata_queued_cmd *qc);
unsigned int (*data_xfer) (struct ata_device *dev, unsigned char *buf,
unsigned int buflen, int rw);
int (*qc_defer) (struct ata_queued_cmd *qc);
void (*qc_prep) (struct ata_queued_cmd *qc);
unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
/* port multiplier */
void (*pmp_attach) (struct ata_port *ap);
void (*pmp_detach) (struct ata_port *ap);
/* Error handlers. ->error_handler overrides ->eng_timeout and
* indicates that new-style EH is in place.
*/
void (*eng_timeout) (struct ata_port *ap); /* obsolete */
void (*freeze) (struct ata_port *ap);
void (*thaw) (struct ata_port *ap);
void (*error_handler) (struct ata_port *ap);
void (*post_internal_cmd) (struct ata_queued_cmd *qc);
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:55:46 +02:00
irq_handler_t irq_handler;
void (*irq_clear) (struct ata_port *);
u8 (*irq_on) (struct ata_port *);
int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
int (*port_resume) (struct ata_port *ap);
int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
void (*disable_pm) (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);
void (*bmdma_stop) (struct ata_queued_cmd *qc);
u8 (*bmdma_status) (struct ata_port *ap);
};
struct ata_port_info {
struct scsi_host_template *sht;
unsigned long flags;
unsigned long link_flags;
unsigned long pio_mask;
unsigned long mwdma_mask;
unsigned long udma_mask;
const struct ata_port_operations *port_ops;
irq_handler_t irq_handler;
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 cycle; /* t0 */
unsigned short udma; /* t2CYCTYP/2 */
};
#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
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 const 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 sata_print_link_status(struct ata_link *link);
extern void ata_port_probe(struct ata_port *);
extern void ata_bus_reset(struct ata_port *ap);
extern int sata_set_spd(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 ata_std_prereset(struct ata_link *link, unsigned long deadline);
extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
libata: add deadline support to prereset and reset methods Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 08:50:52 +01:00
unsigned long deadline);
extern int sata_link_hardreset(struct ata_link *link,
const unsigned long *timing, unsigned long deadline);
extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
libata: add deadline support to prereset and reset methods Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 08:50:52 +01:00
unsigned long deadline);
extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
extern void ata_port_disable(struct ata_port *);
extern void ata_std_ports(struct ata_ioports *ioaddr);
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_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, const 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 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 unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
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 int ata_link_online(struct ata_link *link);
extern int 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 int ata_busy_sleep(struct ata_port *ap,
unsigned long timeout_pat, unsigned long timeout);
extern void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline);
libata: add deadline support to prereset and reset methods Add @deadline to prereset and reset methods and make them honor it. ata_wait_ready() which directly takes @deadline is implemented to be used as the wait function. This patch is in preparation for EH timing improvements. * ata_wait_ready() never does busy sleep. It's only used from EH and no wait in EH is that urgent. This function also prints 'be patient' message automatically after 5 secs of waiting if more than 3 secs is remaining till deadline. * ata_bus_post_reset() now fails with error code if any of its wait fails. This is important because earlier reset tries will have shorter timeout than the spec requires. If a device fails to respond before the short timeout, reset should be retried with longer timeout rather than silently ignoring the device. There are three behavior differences. 1. Timeout is applied to both devices at once, not separately. This is more consistent with what the spec says. 2. When a device passes devchk but fails to become ready before deadline. Previouly, post_reset would just succeed and let device classification remove the device. New code fails the reset thus causing reset retry. After a few times, EH will give up disabling the port. 3. When slave device passes devchk but fails to become accessible (TF-wise) after reset. Original code disables dev1 after 30s timeout and continues as if the device doesn't exist, while the patched code fails reset. When this happens, new code fails reset on whole port rather than proceeding with only the primary device. If the failing device is suffering transient problems, new code retries reset which is a better behavior. If the failing device is actually broken, the net effect is identical to it, but not to the other device sharing the channel. In the previous code, reset would have succeeded after 30s thus detecting the working one. In the new code, reset fails and whole port gets disabled. IMO, it's a pathological case anyway (broken device sharing bus with working one) and doesn't really matter. * ata_bus_softreset() is changed to return error code from ata_bus_post_reset(). It used to return 0 unconditionally. * Spin up waiting is to be removed and not converted to honor deadline. * To be on the safe side, deadline is set to 40s for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 08:50:52 +01:00
extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
unsigned long interval_msec,
unsigned long timeout_msec);
extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
u8 *r_err);
/*
* Default driver ops implementations
*/
extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
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 void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
extern void ata_std_dev_select(struct ata_port *ap, unsigned int device);
extern u8 ata_check_status(struct ata_port *ap);
extern u8 ata_altstatus(struct ata_port *ap);
extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
extern int ata_port_start(struct ata_port *ap);
extern int ata_sff_port_start(struct ata_port *ap);
extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
extern unsigned int ata_data_xfer(struct ata_device *dev,
unsigned char *buf, unsigned int buflen, int rw);
extern unsigned int ata_data_xfer_noirq(struct ata_device *dev,
unsigned char *buf, unsigned int buflen, int rw);
extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
extern void ata_qc_prep(struct ata_queued_cmd *qc);
extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
extern unsigned int ata_qc_issue_prot(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 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_bmdma_irq_clear(struct ata_port *ap);
extern void ata_bmdma_freeze(struct ata_port *ap);
extern void ata_bmdma_thaw(struct ata_port *ap);
[PATCH] libata-hp-prep: add prereset() method and implement ata_std_prereset() With hotplug, every reset might be a probing reset and thus something similar to probe_init() is needed. prereset() method is called before a series of resets to a port and is the counterpart of postreset(). prereset() can tell EH to use different type of reset or skip reset by modifying ehc->i.action. This patch also implements ata_std_prereset(). Most controllers should be able to use this function directly or with some wrapping. After hotplug, different controllers need different actions to resume the PHY and detect the newly attached device. Controllers can be categorized as follows. * Controllers which can wait for the first D2H FIS after hotplug. Note that if the waiting is implemented by polling TF status, there needs to be a way to set BSY on PHY status change. It can be implemented by hardware or with the help of the driver. * Controllers which can wait for the first D2H FIS after sending COMRESET. These controllers need to issue COMRESET to wait for the first FIS. Note that the received D2H FIS could be the first D2H FIS after POR (power-on-reset) or D2H FIS in response to the COMRESET. Some controllers use COMRESET as TF status synchronization point and clear TF automatically (sata_sil). * Controllers which cannot wait for the first D2H FIS reliably. Blindly issuing SRST to spinning-up device often results in command issue failure or timeout, causing extended delay. For these controllers, ata_std_prereset() explicitly waits ATA_SPINUP_WAIT (currently 8s) to give newly attached device time to spin up, then issues reset. Note that failing to getting ready in ATA_SPINUP_WAIT is not critical. libata will retry. So, the timeout needs to be long enough to spin up most devices. LLDDs can tell ata_std_prereset() which of above action is needed with ATA_FLAG_HRST_TO_RESUME and ATA_FLAG_SKIP_D2H_BSY flags. These flags are PHY-specific property and will be moved to ata_link later. While at it, this patch unifies function typedef's such that they all have named arguments. Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-05-31 11:27:48 +02:00
extern void ata_bmdma_drive_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_bmdma_error_handler(struct ata_port *ap);
extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
u8 status, int in_wq);
extern void ata_qc_complete(struct ata_queued_cmd *qc);
extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
void (*finish_qc)(struct ata_queued_cmd *));
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);
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 u8 ata_irq_on(struct ata_port *ap);
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);
enum {
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_CYCLE = (1 << 6),
ATA_TIMING_UDMA = (1 << 7),
ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
};
/* 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
#ifdef CONFIG_PCI
struct pci_dev;
extern int ata_pci_init_one(struct pci_dev *pdev,
const struct ata_port_info * const * ppi);
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
extern int ata_pci_clear_simplex(struct pci_dev *pdev);
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 ata_pci_init_sff_host(struct ata_host *host);
libata: clean up SFF init mess The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 12:43:58 +02:00
extern int ata_pci_init_bmdma(struct ata_host *host);
extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
const struct ata_port_info * const * ppi,
struct ata_host **r_host);
extern int ata_pci_activate_sff_host(struct ata_host *host,
irq_handler_t irq_handler,
struct scsi_host_template *sht);
extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
extern unsigned long ata_pci_default_filter(struct ata_device *dev,
unsigned long xfer_mask);
#endif /* CONFIG_PCI */
/*
* PMP
*/
extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
unsigned long deadline);
extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
extern void sata_pmp_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,
ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
/*
* EH
*/
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);
[PATCH] libata-hp-prep: add prereset() method and implement ata_std_prereset() With hotplug, every reset might be a probing reset and thus something similar to probe_init() is needed. prereset() method is called before a series of resets to a port and is the counterpart of postreset(). prereset() can tell EH to use different type of reset or skip reset by modifying ehc->i.action. This patch also implements ata_std_prereset(). Most controllers should be able to use this function directly or with some wrapping. After hotplug, different controllers need different actions to resume the PHY and detect the newly attached device. Controllers can be categorized as follows. * Controllers which can wait for the first D2H FIS after hotplug. Note that if the waiting is implemented by polling TF status, there needs to be a way to set BSY on PHY status change. It can be implemented by hardware or with the help of the driver. * Controllers which can wait for the first D2H FIS after sending COMRESET. These controllers need to issue COMRESET to wait for the first FIS. Note that the received D2H FIS could be the first D2H FIS after POR (power-on-reset) or D2H FIS in response to the COMRESET. Some controllers use COMRESET as TF status synchronization point and clear TF automatically (sata_sil). * Controllers which cannot wait for the first D2H FIS reliably. Blindly issuing SRST to spinning-up device often results in command issue failure or timeout, causing extended delay. For these controllers, ata_std_prereset() explicitly waits ATA_SPINUP_WAIT (currently 8s) to give newly attached device time to spin up, then issues reset. Note that failing to getting ready in ATA_SPINUP_WAIT is not critical. libata will retry. So, the timeout needs to be long enough to spin up most devices. LLDDs can tell ata_std_prereset() which of above action is needed with ATA_FLAG_HRST_TO_RESUME and ATA_FLAG_SKIP_D2H_BSY flags. These flags are PHY-specific property and will be moved to ata_link later. While at it, this patch unifies function typedef's such that they all have named arguments. Signed-off-by: Tejun Heo <htejun@gmail.com>
2006-05-31 11:27:48 +02:00
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);
/*
* 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 ((link)->ap->nr_pmp_links) \
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_schedule_probe(struct ata_eh_info *ehi)
{
ehi->flags |= ATA_EHI_RESUME_LINK;
ehi->action |= ATA_EH_SOFTRESET;
ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
}
static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
{
ata_ehi_schedule_probe(ehi);
ehi->flags |= ATA_EHI_HOTPLUGGED;
ehi->action |= 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_MAX_QUEUE - 1;
}
/*
* 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_is_host_link(const struct ata_link *link)
{
return link == &link->ap->link;
}
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;
}
static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
{
if (ap->nr_pmp_links)
return ap->pmp_link;
return &ap->link;
}
static inline struct ata_link *ata_port_next_link(struct ata_link *link)
{
struct ata_port *ap = link->ap;
if (link == &ap->link) {
if (!ap->nr_pmp_links)
return NULL;
return ap->pmp_link;
}
if (++link - ap->pmp_link < ap->nr_pmp_links)
return link;
return NULL;
}
#define __ata_port_for_each_link(lk, ap) \
for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
#define ata_port_for_each_link(link, ap) \
for ((link) = ata_port_first_link(ap); (link); \
(link) = ata_port_next_link(link))
#define ata_link_for_each_dev(dev, link) \
for ((dev) = (link)->device; \
(dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
(dev)++)
#define ata_link_for_each_dev_reverse(dev, link) \
for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
(dev) >= (link)->device || ((dev) = NULL); (dev)--)
static inline u8 ata_chk_status(struct ata_port *ap)
{
return ap->ops->check_status(ap);
}
/**
* 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;
}
2005-06-03 00:17:13 +02:00
/**
* ata_pause - Flush writes and pause 400 nanoseconds.
* @ap: Port to wait for.
*
* LOCKING:
* Inherited from caller.
*/
static inline void ata_pause(struct ata_port *ap)
{
ata_altstatus(ap);
ndelay(400);
}
2005-06-03 00:17:13 +02:00
/**
* ata_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
2005-06-03 00:17:13 +02:00
*
* 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_busy_wait(struct ata_port *ap, unsigned int bits,
unsigned int max)
{
u8 status;
do {
udelay(10);
status = ata_chk_status(ap);
max--;
} while (status != 0xff && (status & bits) && (max > 0));
return status;
}
2005-06-03 00:17:13 +02:00
/**
* 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_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;
}
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 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->raw_nbytes = qc->curbytes = 0;
qc->n_elem = 0;
qc->mapped_n_elem = 0;
qc->n_iter = 0;
qc->err_mask = 0;
qc->pad_len = 0;
qc->last_sg = NULL;
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 int atapi_cmd_type(u8 opcode)
{
switch (opcode) {
case GPCMD_READ_10:
case GPCMD_READ_12:
return ATAPI_READ;
case GPCMD_WRITE_10:
case GPCMD_WRITE_12:
case GPCMD_WRITE_AND_VERIFY_10:
return ATAPI_WRITE;
case GPCMD_READ_CD:
case GPCMD_READ_CD_MSF:
return ATAPI_READ_CD;
default:
return ATAPI_MISC;
}
}
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 int ata_pad_alloc(struct ata_port *ap, struct device *dev)
{
ap->pad_dma = 0;
ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
&ap->pad_dma, GFP_KERNEL);
return (ap->pad == NULL) ? -ENOMEM : 0;
}
static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
{
dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
}
2006-04-11 19:12:34 +02:00
static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
{
return *(struct ata_port **)&host->hostdata[0];
2006-04-11 19:12:34 +02:00
}
#endif /* __LINUX_LIBATA_H__ */