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linux_dsm_epyc7002/include/linux/ide.h
David Howells 7d12e780e0 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 15:10:12 +01:00

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#ifndef _IDE_H
#define _IDE_H
/*
* linux/include/linux/ide.h
*
* Copyright (C) 1994-2002 Linus Torvalds & authors
*/
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/hdreg.h>
#include <linux/hdsmart.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/bio.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/completion.h>
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/semaphore.h>
/******************************************************************************
* IDE driver configuration options (play with these as desired):
*
* REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
*/
#define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
#ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
#define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
#endif
#ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
#define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
#endif
#ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
#define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
#endif
#ifndef DISABLE_IRQ_NOSYNC
#define DISABLE_IRQ_NOSYNC 0
#endif
/*
* Used to indicate "no IRQ", should be a value that cannot be an IRQ
* number.
*/
#define IDE_NO_IRQ (-1)
/*
* "No user-serviceable parts" beyond this point :)
*****************************************************************************/
typedef unsigned char byte; /* used everywhere */
/*
* Probably not wise to fiddle with these
*/
#define ERROR_MAX 8 /* Max read/write errors per sector */
#define ERROR_RESET 3 /* Reset controller every 4th retry */
#define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
/*
* Tune flags
*/
#define IDE_TUNE_NOAUTO 2
#define IDE_TUNE_AUTO 1
#define IDE_TUNE_DEFAULT 0
/*
* state flags
*/
#define DMA_PIO_RETRY 1 /* retrying in PIO */
#define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
#define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
/*
* Definitions for accessing IDE controller registers
*/
#define IDE_NR_PORTS (10)
#define IDE_DATA_OFFSET (0)
#define IDE_ERROR_OFFSET (1)
#define IDE_NSECTOR_OFFSET (2)
#define IDE_SECTOR_OFFSET (3)
#define IDE_LCYL_OFFSET (4)
#define IDE_HCYL_OFFSET (5)
#define IDE_SELECT_OFFSET (6)
#define IDE_STATUS_OFFSET (7)
#define IDE_CONTROL_OFFSET (8)
#define IDE_IRQ_OFFSET (9)
#define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
#define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
#define IDE_CONTROL_OFFSET_HOB (7)
#define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
#define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
#define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
#define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
#define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
#define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
#define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
#define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
#define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
#define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
#define IDE_FEATURE_REG IDE_ERROR_REG
#define IDE_COMMAND_REG IDE_STATUS_REG
#define IDE_ALTSTATUS_REG IDE_CONTROL_REG
#define IDE_IREASON_REG IDE_NSECTOR_REG
#define IDE_BCOUNTL_REG IDE_LCYL_REG
#define IDE_BCOUNTH_REG IDE_HCYL_REG
#define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
#define BAD_R_STAT (BUSY_STAT | ERR_STAT)
#define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
#define BAD_STAT (BAD_R_STAT | DRQ_STAT)
#define DRIVE_READY (READY_STAT | SEEK_STAT)
#define DATA_READY (DRQ_STAT)
#define BAD_CRC (ABRT_ERR | ICRC_ERR)
#define SATA_NR_PORTS (3) /* 16 possible ?? */
#define SATA_STATUS_OFFSET (0)
#define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
#define SATA_ERROR_OFFSET (1)
#define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
#define SATA_CONTROL_OFFSET (2)
#define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
#define SATA_MISC_OFFSET (0)
#define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
#define SATA_PHY_OFFSET (1)
#define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
#define SATA_IEN_OFFSET (2)
#define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
/*
* Our Physical Region Descriptor (PRD) table should be large enough
* to handle the biggest I/O request we are likely to see. Since requests
* can have no more than 256 sectors, and since the typical blocksize is
* two or more sectors, we could get by with a limit of 128 entries here for
* the usual worst case. Most requests seem to include some contiguous blocks,
* further reducing the number of table entries required.
*
* The driver reverts to PIO mode for individual requests that exceed
* this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
* 100% of all crazy scenarios here is not necessary.
*
* As it turns out though, we must allocate a full 4KB page for this,
* so the two PRD tables (ide0 & ide1) will each get half of that,
* allowing each to have about 256 entries (8 bytes each) from this.
*/
#define PRD_BYTES 8
#define PRD_ENTRIES 256
/*
* Some more useful definitions
*/
#define PARTN_BITS 6 /* number of minor dev bits for partitions */
#define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
#define SECTOR_SIZE 512
#define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
#define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
/*
* Timeouts for various operations:
*/
#define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
#define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
#define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
#define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
#define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
#define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
/*
* Check for an interrupt and acknowledge the interrupt status
*/
struct hwif_s;
typedef int (ide_ack_intr_t)(struct hwif_s *);
#ifndef NO_DMA
#define NO_DMA 255
#endif
/*
* hwif_chipset_t is used to keep track of the specific hardware
* chipset used by each IDE interface, if known.
*/
typedef enum { ide_unknown, ide_generic, ide_pci,
ide_cmd640, ide_dtc2278, ide_ali14xx,
ide_qd65xx, ide_umc8672, ide_ht6560b,
ide_rz1000, ide_trm290,
ide_cmd646, ide_cy82c693, ide_4drives,
ide_pmac, ide_etrax100, ide_acorn,
ide_au1xxx, ide_forced
} hwif_chipset_t;
/*
* Structure to hold all information about the location of this port
*/
typedef struct hw_regs_s {
unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
int irq; /* our irq number */
int dma; /* our dma entry */
ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
hwif_chipset_t chipset;
struct device *dev;
} hw_regs_t;
/*
* Register new hardware with ide
*/
int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
int ide_register_hw_with_fixup(hw_regs_t *, struct hwif_s **, void (*)(struct hwif_s *));
/*
* Set up hw_regs_t structure before calling ide_register_hw (optional)
*/
void ide_setup_ports( hw_regs_t *hw,
unsigned long base,
int *offsets,
unsigned long ctrl,
unsigned long intr,
ide_ack_intr_t *ack_intr,
#if 0
ide_io_ops_t *iops,
#endif
int irq);
static inline void ide_std_init_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr)
{
unsigned int i;
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
hw->io_ports[i] = io_addr++;
hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
}
#include <asm/ide.h>
#if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
#undef MAX_HWIFS
#define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
#endif
/* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
#ifndef IDE_ARCH_OBSOLETE_DEFAULTS
# define ide_default_io_base(index) (0)
# define ide_default_irq(base) (0)
# define ide_init_default_irq(base) (0)
#endif
/*
* ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series.
* New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>.
*/
#ifdef IDE_ARCH_OBSOLETE_INIT
static inline void ide_init_hwif_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr,
int *irq)
{
if (!ctl_addr)
ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
else
ide_std_init_ports(hw, io_addr, ctl_addr);
if (irq)
*irq = 0;
hw->io_ports[IDE_IRQ_OFFSET] = 0;
#ifdef CONFIG_PPC32
if (ppc_ide_md.ide_init_hwif)
ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
#endif
}
#else
static inline void ide_init_hwif_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr,
int *irq)
{
if (io_addr || ctl_addr)
printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
}
#endif /* IDE_ARCH_OBSOLETE_INIT */
/* Currently only m68k, apus and m8xx need it */
#ifndef IDE_ARCH_ACK_INTR
# define ide_ack_intr(hwif) (1)
#endif
/* Currently only Atari needs it */
#ifndef IDE_ARCH_LOCK
# define ide_release_lock() do {} while (0)
# define ide_get_lock(hdlr, data) do {} while (0)
#endif /* IDE_ARCH_LOCK */
/*
* Now for the data we need to maintain per-drive: ide_drive_t
*/
#define ide_scsi 0x21
#define ide_disk 0x20
#define ide_optical 0x7
#define ide_cdrom 0x5
#define ide_tape 0x1
#define ide_floppy 0x0
/*
* Special Driver Flags
*
* set_geometry : respecify drive geometry
* recalibrate : seek to cyl 0
* set_multmode : set multmode count
* set_tune : tune interface for drive
* serviced : service command
* reserved : unused
*/
typedef union {
unsigned all : 8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned set_geometry : 1;
unsigned recalibrate : 1;
unsigned set_multmode : 1;
unsigned set_tune : 1;
unsigned serviced : 1;
unsigned reserved : 3;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved : 3;
unsigned serviced : 1;
unsigned set_tune : 1;
unsigned set_multmode : 1;
unsigned recalibrate : 1;
unsigned set_geometry : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} special_t;
/*
* ATA DATA Register Special.
* ATA NSECTOR Count Register().
* ATAPI Byte Count Register.
* Channel index ordering pairs.
*/
typedef union {
unsigned all :16;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned low :8; /* LSB */
unsigned high :8; /* MSB */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned high :8; /* MSB */
unsigned low :8; /* LSB */
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
/*
* ATA-IDE Select Register, aka Device-Head
*
* head : always zeros here
* unit : drive select number: 0/1
* bit5 : always 1
* lba : using LBA instead of CHS
* bit7 : always 1
*/
typedef union {
unsigned all : 8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned head : 4;
unsigned unit : 1;
unsigned bit5 : 1;
unsigned lba : 1;
unsigned bit7 : 1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bit7 : 1;
unsigned lba : 1;
unsigned bit5 : 1;
unsigned unit : 1;
unsigned head : 4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} select_t, ata_select_t;
/*
* The ATA-IDE Status Register.
* The ATAPI Status Register.
*
* check : Error occurred
* idx : Index Error
* corr : Correctable error occurred
* drq : Data is request by the device
* dsc : Disk Seek Complete : ata
* : Media access command finished : atapi
* df : Device Fault : ata
* : Reserved : atapi
* drdy : Ready, Command Mode Capable : ata
* : Ignored for ATAPI commands : atapi
* bsy : Disk is Busy
* : The device has access to the command block
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned check :1;
unsigned idx :1;
unsigned corr :1;
unsigned drq :1;
unsigned dsc :1;
unsigned df :1;
unsigned drdy :1;
unsigned bsy :1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bsy :1;
unsigned drdy :1;
unsigned df :1;
unsigned dsc :1;
unsigned drq :1;
unsigned corr :1;
unsigned idx :1;
unsigned check :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} ata_status_t, atapi_status_t;
/*
* ATAPI Feature Register
*
* dma : Using DMA or PIO
* reserved321 : Reserved
* reserved654 : Reserved (Tag Type)
* reserved7 : Reserved
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned dma :1;
unsigned reserved321 :3;
unsigned reserved654 :3;
unsigned reserved7 :1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved7 :1;
unsigned reserved654 :3;
unsigned reserved321 :3;
unsigned dma :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_feature_t;
/*
* ATAPI Interrupt Reason Register.
*
* cod : Information transferred is command (1) or data (0)
* io : The device requests us to read (1) or write (0)
* reserved : Reserved
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned cod :1;
unsigned io :1;
unsigned reserved :6;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved :6;
unsigned io :1;
unsigned cod :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_ireason_t;
/*
* The ATAPI error register.
*
* ili : Illegal Length Indication
* eom : End Of Media Detected
* abrt : Aborted command - As defined by ATA
* mcr : Media Change Requested - As defined by ATA
* sense_key : Sense key of the last failed packet command
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned ili :1;
unsigned eom :1;
unsigned abrt :1;
unsigned mcr :1;
unsigned sense_key :4;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned sense_key :4;
unsigned mcr :1;
unsigned abrt :1;
unsigned eom :1;
unsigned ili :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_error_t;
/*
* Status returned from various ide_ functions
*/
typedef enum {
ide_stopped, /* no drive operation was started */
ide_started, /* a drive operation was started, handler was set */
} ide_startstop_t;
struct ide_driver_s;
struct ide_settings_s;
typedef struct ide_drive_s {
char name[4]; /* drive name, such as "hda" */
char driver_req[10]; /* requests specific driver */
request_queue_t *queue; /* request queue */
struct request *rq; /* current request */
struct ide_drive_s *next; /* circular list of hwgroup drives */
void *driver_data; /* extra driver data */
struct hd_driveid *id; /* drive model identification info */
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
struct ide_settings_s *settings;/* /proc/ide/ drive settings */
struct hwif_s *hwif; /* actually (ide_hwif_t *) */
unsigned long sleep; /* sleep until this time */
unsigned long service_start; /* time we started last request */
unsigned long service_time; /* service time of last request */
unsigned long timeout; /* max time to wait for irq */
special_t special; /* special action flags */
select_t select; /* basic drive/head select reg value */
u8 keep_settings; /* restore settings after drive reset */
u8 autodma; /* device can safely use dma on host */
u8 using_dma; /* disk is using dma for read/write */
u8 retry_pio; /* retrying dma capable host in pio */
u8 state; /* retry state */
u8 waiting_for_dma; /* dma currently in progress */
u8 unmask; /* okay to unmask other irqs */
u8 bswap; /* byte swap data */
u8 noflush; /* don't attempt flushes */
u8 dsc_overlap; /* DSC overlap */
u8 nice1; /* give potential excess bandwidth */
unsigned present : 1; /* drive is physically present */
unsigned dead : 1; /* device ejected hint */
unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
unsigned noprobe : 1; /* from: hdx=noprobe */
unsigned removable : 1; /* 1 if need to do check_media_change */
unsigned attach : 1; /* needed for removable devices */
unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
unsigned no_unmask : 1; /* disallow setting unmask bit */
unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
unsigned nice0 : 1; /* give obvious excess bandwidth */
unsigned nice2 : 1; /* give a share in our own bandwidth */
unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
unsigned addressing; /* : 3;
* 0=28-bit
* 1=48-bit
* 2=48-bit doing 28-bit
* 3=64-bit
*/
unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
unsigned post_reset : 1;
u8 quirk_list; /* considered quirky, set for a specific host */
u8 init_speed; /* transfer rate set at boot */
u8 pio_speed; /* unused by core, used by some drivers for fallback from DMA */
u8 current_speed; /* current transfer rate set */
u8 dn; /* now wide spread use */
u8 wcache; /* status of write cache */
u8 acoustic; /* acoustic management */
u8 media; /* disk, cdrom, tape, floppy, ... */
u8 ctl; /* "normal" value for IDE_CONTROL_REG */
u8 ready_stat; /* min status value for drive ready */
u8 mult_count; /* current multiple sector setting */
u8 mult_req; /* requested multiple sector setting */
u8 tune_req; /* requested drive tuning setting */
u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
u8 bad_wstat; /* used for ignoring WRERR_STAT */
u8 nowerr; /* used for ignoring WRERR_STAT */
u8 sect0; /* offset of first sector for DM6:DDO */
u8 head; /* "real" number of heads */
u8 sect; /* "real" sectors per track */
u8 bios_head; /* BIOS/fdisk/LILO number of heads */
u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
unsigned int cyl; /* "real" number of cyls */
unsigned int drive_data; /* use by tuneproc/selectproc */
unsigned int usage; /* current "open()" count for drive */
unsigned int failures; /* current failure count */
unsigned int max_failures; /* maximum allowed failure count */
u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
u64 capacity64; /* total number of sectors */
int lun; /* logical unit */
int crc_count; /* crc counter to reduce drive speed */
struct list_head list;
struct device gendev;
struct completion gendev_rel_comp; /* to deal with device release() */
} ide_drive_t;
#define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
#define IDE_CHIPSET_PCI_MASK \
((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
#define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
struct ide_pci_device_s;
typedef struct hwif_s {
struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
struct hwif_s *mate; /* other hwif from same PCI chip */
struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
char name[6]; /* name of interface, eg. "ide0" */
/* task file registers for pata and sata */
unsigned long io_ports[IDE_NR_PORTS];
unsigned long sata_scr[SATA_NR_PORTS];
unsigned long sata_misc[SATA_NR_PORTS];
hw_regs_t hw; /* Hardware info */
ide_drive_t drives[MAX_DRIVES]; /* drive info */
u8 major; /* our major number */
u8 index; /* 0 for ide0; 1 for ide1; ... */
u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
u8 straight8; /* Alan's straight 8 check */
u8 bus_state; /* power state of the IDE bus */
u8 atapi_dma; /* host supports atapi_dma */
u8 ultra_mask;
u8 mwdma_mask;
u8 swdma_mask;
hwif_chipset_t chipset; /* sub-module for tuning.. */
struct pci_dev *pci_dev; /* for pci chipsets */
struct ide_pci_device_s *cds; /* chipset device struct */
void (*rw_disk)(ide_drive_t *, struct request *);
#if 0
ide_hwif_ops_t *hwifops;
#else
/* routine to tune PIO mode for drives */
void (*tuneproc)(ide_drive_t *, u8);
/* routine to retune DMA modes for drives */
int (*speedproc)(ide_drive_t *, u8);
/* tweaks hardware to select drive */
void (*selectproc)(ide_drive_t *);
/* chipset polling based on hba specifics */
int (*reset_poll)(ide_drive_t *);
/* chipset specific changes to default for device-hba resets */
void (*pre_reset)(ide_drive_t *);
/* routine to reset controller after a disk reset */
void (*resetproc)(ide_drive_t *);
/* special interrupt handling for shared pci interrupts */
void (*intrproc)(ide_drive_t *);
/* special host masking for drive selection */
void (*maskproc)(ide_drive_t *, int);
/* check host's drive quirk list */
int (*quirkproc)(ide_drive_t *);
/* driver soft-power interface */
int (*busproc)(ide_drive_t *, int);
// /* host rate limiter */
// u8 (*ratemask)(ide_drive_t *);
// /* device rate limiter */
// u8 (*ratefilter)(ide_drive_t *, u8);
#endif
void (*ata_input_data)(ide_drive_t *, void *, u32);
void (*ata_output_data)(ide_drive_t *, void *, u32);
void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
int (*dma_setup)(ide_drive_t *);
void (*dma_exec_cmd)(ide_drive_t *, u8);
void (*dma_start)(ide_drive_t *);
int (*ide_dma_end)(ide_drive_t *drive);
int (*ide_dma_check)(ide_drive_t *drive);
int (*ide_dma_on)(ide_drive_t *drive);
int (*ide_dma_off_quietly)(ide_drive_t *drive);
int (*ide_dma_test_irq)(ide_drive_t *drive);
int (*ide_dma_host_on)(ide_drive_t *drive);
int (*ide_dma_host_off)(ide_drive_t *drive);
int (*ide_dma_lostirq)(ide_drive_t *drive);
int (*ide_dma_timeout)(ide_drive_t *drive);
void (*OUTB)(u8 addr, unsigned long port);
void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
void (*OUTW)(u16 addr, unsigned long port);
void (*OUTL)(u32 addr, unsigned long port);
void (*OUTSW)(unsigned long port, void *addr, u32 count);
void (*OUTSL)(unsigned long port, void *addr, u32 count);
u8 (*INB)(unsigned long port);
u16 (*INW)(unsigned long port);
u32 (*INL)(unsigned long port);
void (*INSW)(unsigned long port, void *addr, u32 count);
void (*INSL)(unsigned long port, void *addr, u32 count);
/* dma physical region descriptor table (cpu view) */
unsigned int *dmatable_cpu;
/* dma physical region descriptor table (dma view) */
dma_addr_t dmatable_dma;
/* Scatter-gather list used to build the above */
struct scatterlist *sg_table;
int sg_max_nents; /* Maximum number of entries in it */
int sg_nents; /* Current number of entries in it */
int sg_dma_direction; /* dma transfer direction */
/* data phase of the active command (currently only valid for PIO/DMA) */
int data_phase;
unsigned int nsect;
unsigned int nleft;
unsigned int cursg;
unsigned int cursg_ofs;
int mmio; /* hosts iomio (0) or custom (2) select */
int rqsize; /* max sectors per request */
int irq; /* our irq number */
unsigned long dma_master; /* reference base addr dmabase */
unsigned long dma_base; /* base addr for dma ports */
unsigned long dma_command; /* dma command register */
unsigned long dma_vendor1; /* dma vendor 1 register */
unsigned long dma_status; /* dma status register */
unsigned long dma_vendor3; /* dma vendor 3 register */
unsigned long dma_prdtable; /* actual prd table address */
unsigned long config_data; /* for use by chipset-specific code */
unsigned long select_data; /* for use by chipset-specific code */
unsigned long extra_base; /* extra addr for dma ports */
unsigned extra_ports; /* number of extra dma ports */
unsigned noprobe : 1; /* don't probe for this interface */
unsigned present : 1; /* this interface exists */
unsigned hold : 1; /* this interface is always present */
unsigned serialized : 1; /* serialized all channel operation */
unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
unsigned reset : 1; /* reset after probe */
unsigned autodma : 1; /* auto-attempt using DMA at boot */
unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */
unsigned no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */
unsigned auto_poll : 1; /* supports nop auto-poll */
unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
unsigned err_stops_fifo : 1; /* 1=data FIFO is cleared by an error */
struct device gendev;
struct completion gendev_rel_comp; /* To deal with device release() */
void *hwif_data; /* extra hwif data */
unsigned dma;
void (*led_act)(void *data, int rw);
} ____cacheline_internodealigned_in_smp ide_hwif_t;
/*
* internal ide interrupt handler type
*/
typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
typedef int (ide_expiry_t)(ide_drive_t *);
typedef struct hwgroup_s {
/* irq handler, if active */
ide_startstop_t (*handler)(ide_drive_t *);
/* irq handler, suspended if active */
ide_startstop_t (*handler_save)(ide_drive_t *);
/* BOOL: protects all fields below */
volatile int busy;
/* BOOL: wake us up on timer expiry */
unsigned int sleeping : 1;
/* BOOL: polling active & poll_timeout field valid */
unsigned int polling : 1;
/* BOOL: in a polling reset situation. Must not trigger another reset yet */
unsigned int resetting : 1;
/* current drive */
ide_drive_t *drive;
/* ptr to current hwif in linked-list */
ide_hwif_t *hwif;
/* for pci chipsets */
struct pci_dev *pci_dev;
/* chipset device struct */
struct ide_pci_device_s *cds;
/* current request */
struct request *rq;
/* failsafe timer */
struct timer_list timer;
/* local copy of current write rq */
struct request wrq;
/* timeout value during long polls */
unsigned long poll_timeout;
/* queried upon timeouts */
int (*expiry)(ide_drive_t *);
/* ide_system_bus_speed */
int pio_clock;
unsigned char cmd_buf[4];
} ide_hwgroup_t;
/* structure attached to the request for IDE_TASK_CMDS */
/*
* configurable drive settings
*/
#define TYPE_INT 0
#define TYPE_INTA 1
#define TYPE_BYTE 2
#define TYPE_SHORT 3
#define SETTING_READ (1 << 0)
#define SETTING_WRITE (1 << 1)
#define SETTING_RW (SETTING_READ | SETTING_WRITE)
typedef int (ide_procset_t)(ide_drive_t *, int);
typedef struct ide_settings_s {
char *name;
int rw;
int read_ioctl;
int write_ioctl;
int data_type;
int min;
int max;
int mul_factor;
int div_factor;
void *data;
ide_procset_t *set;
int auto_remove;
struct ide_settings_s *next;
} ide_settings_t;
extern struct semaphore ide_setting_sem;
extern int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set);
extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
extern void ide_add_generic_settings(ide_drive_t *drive);
/*
* /proc/ide interface
*/
typedef struct {
const char *name;
mode_t mode;
read_proc_t *read_proc;
write_proc_t *write_proc;
} ide_proc_entry_t;
#ifdef CONFIG_PROC_FS
extern struct proc_dir_entry *proc_ide_root;
extern void proc_ide_create(void);
extern void proc_ide_destroy(void);
extern void create_proc_ide_interfaces(void);
void destroy_proc_ide_interface(ide_hwif_t *);
extern void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
extern void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
read_proc_t proc_ide_read_capacity;
read_proc_t proc_ide_read_geometry;
#ifdef CONFIG_BLK_DEV_IDEPCI
void ide_pci_create_host_proc(const char *, get_info_t *);
#endif
/*
* Standard exit stuff:
*/
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
{ \
len -= off; \
if (len < count) { \
*eof = 1; \
if (len <= 0) \
return 0; \
} else \
len = count; \
*start = page + off; \
return len; \
}
#else
static inline void create_proc_ide_interfaces(void) { ; }
static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; }
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
#endif
/*
* Power Management step value (rq->pm->pm_step).
*
* The step value starts at 0 (ide_pm_state_start_suspend) for a
* suspend operation or 1000 (ide_pm_state_start_resume) for a
* resume operation.
*
* For each step, the core calls the subdriver start_power_step() first.
* This can return:
* - ide_stopped : In this case, the core calls us back again unless
* step have been set to ide_power_state_completed.
* - ide_started : In this case, the channel is left busy until an
* async event (interrupt) occurs.
* Typically, start_power_step() will issue a taskfile request with
* do_rw_taskfile().
*
* Upon reception of the interrupt, the core will call complete_power_step()
* with the error code if any. This routine should update the step value
* and return. It should not start a new request. The core will call
* start_power_step for the new step value, unless step have been set to
* ide_power_state_completed.
*
* Subdrivers are expected to define their own additional power
* steps from 1..999 for suspend and from 1001..1999 for resume,
* other values are reserved for future use.
*/
enum {
ide_pm_state_completed = -1,
ide_pm_state_start_suspend = 0,
ide_pm_state_start_resume = 1000,
};
/*
* Subdrivers support.
*
* The gendriver.owner field should be set to the module owner of this driver.
* The gendriver.name field should be set to the name of this driver
*/
typedef struct ide_driver_s {
const char *version;
u8 media;
unsigned supports_dsc_overlap : 1;
ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
int (*end_request)(ide_drive_t *, int, int);
ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
ide_proc_entry_t *proc;
struct device_driver gen_driver;
int (*probe)(ide_drive_t *);
void (*remove)(ide_drive_t *);
void (*shutdown)(ide_drive_t *);
} ide_driver_t;
#define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
/*
* ide_hwifs[] is the master data structure used to keep track
* of just about everything in ide.c. Whenever possible, routines
* should be using pointers to a drive (ide_drive_t *) or
* pointers to a hwif (ide_hwif_t *), rather than indexing this
* structure directly (the allocation/layout may change!).
*
*/
#ifndef _IDE_C
extern ide_hwif_t ide_hwifs[]; /* master data repository */
#endif
extern int noautodma;
extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
int uptodate, int nr_sectors);
/*
* This is used on exit from the driver to designate the next irq handler
* and also to start the safety timer.
*/
extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
/*
* This is used on exit from the driver to designate the next irq handler
* and start the safety time safely and atomically from the IRQ handler
* with respect to the command issue (which it also does)
*/
extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
/*
* ide_error() takes action based on the error returned by the controller.
* The caller should return immediately after invoking this.
*
* (drive, msg, status)
*/
ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
/*
* Abort a running command on the controller triggering the abort
* from a host side, non error situation
* (drive, msg)
*/
extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
extern void ide_fix_driveid(struct hd_driveid *);
/*
* ide_fixstring() cleans up and (optionally) byte-swaps a text string,
* removing leading/trailing blanks and compressing internal blanks.
* It is primarily used to tidy up the model name/number fields as
* returned by the WIN_[P]IDENTIFY commands.
*
* (s, bytecount, byteswap)
*/
extern void ide_fixstring(u8 *, const int, const int);
/*
* This routine busy-waits for the drive status to be not "busy".
* It then checks the status for all of the "good" bits and none
* of the "bad" bits, and if all is okay it returns 0. All other
* cases return 1 after doing "*startstop = ide_error()", and the
* caller should return the updated value of "startstop" in this case.
* "startstop" is unchanged when the function returns 0;
* (startstop, drive, good, bad, timeout)
*/
extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
/*
* Start a reset operation for an IDE interface.
* The caller should return immediately after invoking this.
*/
extern ide_startstop_t ide_do_reset (ide_drive_t *);
/*
* This function is intended to be used prior to invoking ide_do_drive_cmd().
*/
extern void ide_init_drive_cmd (struct request *rq);
/*
* this function returns error location sector offset in case of a write error
*/
extern u64 ide_get_error_location(ide_drive_t *, char *);
/*
* "action" parameter type for ide_do_drive_cmd() below.
*/
typedef enum {
ide_wait, /* insert rq at end of list, and wait for it */
ide_preempt, /* insert rq in front of current request */
ide_head_wait, /* insert rq in front of current request and wait for it */
ide_end /* insert rq at end of list, but don't wait for it */
} ide_action_t;
extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
/*
* Clean up after success/failure of an explicit drive cmd.
* stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
* stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
*
* (ide_drive_t *drive, u8 stat, u8 err)
*/
extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
/*
* Issue ATA command and wait for completion.
* Use for implementing commands in kernel
*
* (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
*/
extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
typedef struct ide_task_s {
/*
* struct hd_drive_task_hdr tf;
* task_struct_t tf;
* struct hd_drive_hob_hdr hobf;
* hob_struct_t hobf;
*/
task_ioreg_t tfRegister[8];
task_ioreg_t hobRegister[8];
ide_reg_valid_t tf_out_flags;
ide_reg_valid_t tf_in_flags;
int data_phase;
int command_type;
ide_pre_handler_t *prehandler;
ide_handler_t *handler;
struct request *rq; /* copy of request */
void *special; /* valid_t generally */
} ide_task_t;
extern u32 ide_read_24(ide_drive_t *);
extern void SELECT_DRIVE(ide_drive_t *);
extern void SELECT_INTERRUPT(ide_drive_t *);
extern void SELECT_MASK(ide_drive_t *, int);
extern void QUIRK_LIST(ide_drive_t *);
extern int drive_is_ready(ide_drive_t *);
extern int wait_for_ready(ide_drive_t *, int /* timeout */);
/*
* taskfile io for disks for now...and builds request from ide_ioctl
*/
extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
/*
* Special Flagged Register Validation Caller
*/
extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
extern ide_startstop_t set_multmode_intr(ide_drive_t *);
extern ide_startstop_t set_geometry_intr(ide_drive_t *);
extern ide_startstop_t recal_intr(ide_drive_t *);
extern ide_startstop_t task_no_data_intr(ide_drive_t *);
extern ide_startstop_t task_in_intr(ide_drive_t *);
extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
extern int system_bus_clock(void);
extern int ide_driveid_update(ide_drive_t *);
extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
extern int ide_config_drive_speed(ide_drive_t *, u8);
extern u8 eighty_ninty_three (ide_drive_t *);
extern int set_transfer(ide_drive_t *, ide_task_t *);
extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
/*
* ide_stall_queue() can be used by a drive to give excess bandwidth back
* to the hwgroup by sleeping for timeout jiffies.
*/
extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
extern int ide_spin_wait_hwgroup(ide_drive_t *);
extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id);
extern void do_ide_request(request_queue_t *);
void ide_init_disk(struct gendisk *, ide_drive_t *);
extern int ideprobe_init(void);
extern void ide_scan_pcibus(int scan_direction) __init;
extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner);
#define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE)
void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);
extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
extern void default_hwif_iops(ide_hwif_t *);
extern void default_hwif_mmiops(ide_hwif_t *);
extern void default_hwif_transport(ide_hwif_t *);
void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
#define ON_BOARD 1
#define NEVER_BOARD 0
#ifdef CONFIG_BLK_DEV_OFFBOARD
# define OFF_BOARD ON_BOARD
#else /* CONFIG_BLK_DEV_OFFBOARD */
# define OFF_BOARD NEVER_BOARD
#endif /* CONFIG_BLK_DEV_OFFBOARD */
#define NODMA 0
#define NOAUTODMA 1
#define AUTODMA 2
typedef struct ide_pci_enablebit_s {
u8 reg; /* byte pci reg holding the enable-bit */
u8 mask; /* mask to isolate the enable-bit */
u8 val; /* value of masked reg when "enabled" */
} ide_pci_enablebit_t;
enum {
/* Uses ISA control ports not PCI ones. */
IDEPCI_FLAG_ISA_PORTS = (1 << 0),
};
typedef struct ide_pci_device_s {
char *name;
int (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
unsigned int (*init_chipset)(struct pci_dev *, const char *);
void (*init_iops)(ide_hwif_t *);
void (*init_hwif)(ide_hwif_t *);
void (*init_dma)(ide_hwif_t *, unsigned long);
void (*fixup)(ide_hwif_t *);
u8 channels;
u8 autodma;
ide_pci_enablebit_t enablebits[2];
u8 bootable;
unsigned int extra;
struct ide_pci_device_s *next;
u8 flags;
} ide_pci_device_t;
extern int ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
extern int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
void ide_map_sg(ide_drive_t *, struct request *);
void ide_init_sg_cmd(ide_drive_t *, struct request *);
#define BAD_DMA_DRIVE 0
#define GOOD_DMA_DRIVE 1
#ifdef CONFIG_BLK_DEV_IDEDMA
struct drive_list_entry {
const char *id_model;
const char *id_firmware;
};
int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
int __ide_dma_bad_drive(ide_drive_t *);
int __ide_dma_good_drive(ide_drive_t *);
int ide_use_dma(ide_drive_t *);
int __ide_dma_off(ide_drive_t *);
void ide_dma_verbose(ide_drive_t *);
ide_startstop_t ide_dma_intr(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
extern int ide_build_sglist(ide_drive_t *, struct request *);
extern int ide_build_dmatable(ide_drive_t *, struct request *);
extern void ide_destroy_dmatable(ide_drive_t *);
extern int ide_release_dma(ide_hwif_t *);
extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
extern int __ide_dma_host_off(ide_drive_t *);
extern int __ide_dma_off_quietly(ide_drive_t *);
extern int __ide_dma_host_on(ide_drive_t *);
extern int __ide_dma_on(ide_drive_t *);
extern int __ide_dma_check(ide_drive_t *);
extern int ide_dma_setup(ide_drive_t *);
extern void ide_dma_start(ide_drive_t *);
extern int __ide_dma_end(ide_drive_t *);
extern int __ide_dma_lostirq(ide_drive_t *);
extern int __ide_dma_timeout(ide_drive_t *);
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
#else
static inline int ide_use_dma(ide_drive_t *drive) { return 0; }
static inline int __ide_dma_off(ide_drive_t *drive) { return 0; }
static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
#endif /* CONFIG_BLK_DEV_IDEDMA */
#ifndef CONFIG_BLK_DEV_IDEDMA_PCI
static inline void ide_release_dma(ide_hwif_t *drive) {;}
#endif
extern int ide_hwif_request_regions(ide_hwif_t *hwif);
extern void ide_hwif_release_regions(ide_hwif_t* hwif);
extern void ide_unregister (unsigned int index);
void ide_register_region(struct gendisk *);
void ide_unregister_region(struct gendisk *);
void ide_undecoded_slave(ide_hwif_t *);
int probe_hwif_init_with_fixup(ide_hwif_t *, void (*)(ide_hwif_t *));
extern int probe_hwif_init(ide_hwif_t *);
static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
{
return hwif->hwif_data;
}
static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
{
hwif->hwif_data = data;
}
/* ide-lib.c */
extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode);
extern u8 ide_rate_filter(u8 mode, u8 speed);
extern int ide_dma_enable(ide_drive_t *drive);
extern char *ide_xfer_verbose(u8 xfer_rate);
extern void ide_toggle_bounce(ide_drive_t *drive, int on);
extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
u8 ide_dump_status(ide_drive_t *, const char *, u8);
typedef struct ide_pio_timings_s {
int setup_time; /* Address setup (ns) minimum */
int active_time; /* Active pulse (ns) minimum */
int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */
} ide_pio_timings_t;
typedef struct ide_pio_data_s {
u8 pio_mode;
u8 use_iordy;
u8 overridden;
u8 blacklisted;
unsigned int cycle_time;
} ide_pio_data_t;
extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
extern const ide_pio_timings_t ide_pio_timings[6];
extern spinlock_t ide_lock;
extern struct semaphore ide_cfg_sem;
/*
* Structure locking:
*
* ide_cfg_sem and ide_lock together protect changes to
* ide_hwif_t->{next,hwgroup}
* ide_drive_t->next
*
* ide_hwgroup_t->busy: ide_lock
* ide_hwgroup_t->hwif: ide_lock
* ide_hwif_t->mate: constant, no locking
* ide_drive_t->hwif: constant, no locking
*/
#define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
extern struct bus_type ide_bus_type;
/* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
#define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
/* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
#define ide_id_has_flush_cache_ext(id) \
(((id)->cfs_enable_2 & 0x2400) == 0x2400)
static inline int hwif_to_node(ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
return dev ? pcibus_to_node(dev->bus) : -1;
}
#endif /* _IDE_H */
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