| #ifndef _IDE_H |
| #define _IDE_H |
| |
| /* |
| * Copyright (C) 1994-2002 Linus Torvalds & authors |
| */ |
| |
| #include <linux/config.h> |
| #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/device.h> |
| #include <linux/devfs_fs_kernel.h> |
| #include <linux/interrupt.h> |
| #include <linux/bitops.h> |
| #include <linux/bio.h> |
| #include <asm/byteorder.h> |
| #include <asm/hdreg.h> |
| |
| /* |
| * This is the multiple IDE interface driver, as evolved from hd.c. |
| * It supports up to four IDE interfaces, on one or more IRQs (usually 14, 15). |
| * There can be up to two drives per interface, as per the ATA-2 spec. |
| * |
| * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64 |
| * Secondary i/f: ide1: major=22; (hdc) minor=0; (hdd) minor=64 |
| * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64 |
| * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64 |
| */ |
| |
| /****************************************************************************** |
| * IDE driver configuration options (play with these as desired): |
| */ |
| #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 FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */ |
| # define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */ |
| #endif |
| #ifndef DISABLE_IRQ_NOSYNC |
| # define DISABLE_IRQ_NOSYNC 0 |
| #endif |
| |
| /* |
| * "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 */ |
| |
| /* |
| * State flags. |
| */ |
| #define DMA_PIO_RETRY 1 /* retrying in PIO */ |
| |
| /* |
| * Definitions for accessing IDE controller registers. |
| */ |
| |
| enum { |
| IDE_DATA_OFFSET = 0, |
| IDE_ERROR_OFFSET = 1, |
| IDE_FEATURE_OFFSET = 1, |
| IDE_NSECTOR_OFFSET = 2, |
| IDE_SECTOR_OFFSET = 3, |
| IDE_LCYL_OFFSET = 4, |
| IDE_HCYL_OFFSET = 5, |
| IDE_SELECT_OFFSET = 6, |
| IDE_STATUS_OFFSET = 7, |
| IDE_COMMAND_OFFSET = 7, |
| IDE_CONTROL_OFFSET = 8, |
| IDE_ALTSTATUS_OFFSET = 8, |
| IDE_IRQ_OFFSET = 9, |
| IDE_NR_PORTS = 10 |
| }; |
| |
| |
| #define IDE_DATA_REG (drive->channel->io_ports[IDE_DATA_OFFSET]) |
| #define IDE_ERROR_REG (drive->channel->io_ports[IDE_ERROR_OFFSET]) |
| #define IDE_NSECTOR_REG (drive->channel->io_ports[IDE_NSECTOR_OFFSET]) |
| #define IDE_SECTOR_REG (drive->channel->io_ports[IDE_SECTOR_OFFSET]) |
| #define IDE_LCYL_REG (drive->channel->io_ports[IDE_LCYL_OFFSET]) |
| #define IDE_HCYL_REG (drive->channel->io_ports[IDE_HCYL_OFFSET]) |
| #define IDE_SELECT_REG (drive->channel->io_ports[IDE_SELECT_OFFSET]) |
| #define IDE_COMMAND_REG (drive->channel->io_ports[IDE_STATUS_OFFSET]) |
| #define IDE_IRQ_REG (drive->channel->io_ports[IDE_IRQ_OFFSET]) |
| |
| #define IDE_FEATURE_REG IDE_ERROR_REG |
| #define IDE_IREASON_REG IDE_NSECTOR_REG |
| #define IDE_BCOUNTL_REG IDE_LCYL_REG |
| #define IDE_BCOUNTH_REG IDE_HCYL_REG |
| |
| #define GET_ERR() IN_BYTE(IDE_ERROR_REG) |
| #define GET_ALTSTAT() IN_BYTE(drive->channel->io_ports[IDE_CONTROL_OFFSET]) |
| #define GET_FEAT() IN_BYTE(IDE_NSECTOR_REG) |
| |
| #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) |
| |
| /* |
| * 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. |
| * |
| * 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 (PAGE_SIZE / (2 * PRD_BYTES)) |
| |
| /* |
| * Some more useful definitions |
| */ |
| #define IDE_MAJOR_NAME "hd" /* the same for all i/f; see also genhd.c */ |
| #define MAJOR_NAME IDE_MAJOR_NAME |
| #define PARTN_BITS 6 /* number of minor dev bits for partitions */ |
| #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */ |
| #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 */ |
| |
| /* |
| * Timeouts for various operations: |
| */ |
| #define WAIT_DRQ (5*HZ/100) /* 50msec - 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 ata_channel; |
| typedef int (ide_ack_intr_t)(struct ata_channel *); |
| |
| #ifndef NO_DMA |
| # define NO_DMA 255 |
| #endif |
| |
| /* |
| * This is used to keep track of the specific hardware chipset used by each IDE |
| * interface, if known. Please note that we don't discriminate between |
| * different PCI host chips here. |
| */ |
| typedef enum { |
| ide_unknown, |
| ide_generic, |
| ide_pci, |
| ide_cmd640, |
| ide_dtc2278, |
| ide_ali14xx, |
| ide_qd65xx, |
| ide_umc8672, |
| ide_ht6560b, |
| ide_pdc4030, |
| ide_rz1000, |
| ide_trm290, |
| ide_cmd646, |
| ide_cy82c693, |
| ide_pmac, |
| ide_etrax100, |
| ide_acorn |
| } hwif_chipset_t; |
| |
| |
| #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) |
| |
| /* |
| * Structure to hold all information about the location of this port |
| */ |
| typedef struct hw_regs_s { |
| ide_ioreg_t io_ports[IDE_NR_PORTS]; /* task file registers */ |
| int irq; /* our irq number */ |
| int dma; /* our dma entry */ |
| int (*ack_intr)(struct ata_channel *); /* acknowledge interrupt */ |
| hwif_chipset_t chipset; |
| } hw_regs_t; |
| |
| /* |
| * Set up hw_regs_t structure before calling ide_register_hw (optional) |
| */ |
| extern void ide_setup_ports(hw_regs_t *hw, |
| ide_ioreg_t base, int *offsets, |
| ide_ioreg_t ctrl, ide_ioreg_t intr, |
| int (*ack_intr)(struct ata_channel *), |
| int irq); |
| |
| #include <asm/ide.h> |
| |
| /* Currently only m68k, apus and m8xx need it */ |
| #ifdef ATA_ARCH_ACK_INTR |
| extern int ide_irq_lock; |
| # define ide_ack_intr(hwif) (hwif->hw.ack_intr ? hwif->hw.ack_intr(hwif) : 1) |
| #else |
| # define ide_ack_intr(hwif) (1) |
| #endif |
| |
| /* Currently only Atari needs it */ |
| #ifndef ATA_ARCH_LOCK |
| # define ide_release_lock(lock) do {} while (0) |
| # define ide_get_lock(lock, hdlr, data) do {} while (0) |
| #endif |
| |
| /* |
| * If the arch-dependant ide.h did not declare/define any OUT_BYTE or IN_BYTE |
| * functions, we make some defaults here. The only architecture currently |
| * needing this is Cris. |
| */ |
| |
| #ifndef HAVE_ARCH_IN_OUT |
| # define OUT_BYTE(b,p) outb((b),(p)) |
| # define OUT_WORD(w,p) outw((w),(p)) |
| # define IN_BYTE(p) (u8)inb(p) |
| # define IN_WORD(p) (u16)inw(p) |
| #endif |
| |
| /* |
| * Device types - the nomenclature is analogous to SCSI code. |
| */ |
| |
| #define ATA_DISK 0x20 |
| #define ATA_TAPE 0x01 |
| #define ATA_ROM 0x05 /* CD-ROM */ |
| #define ATA_MOD 0x07 /* optical */ |
| #define ATA_FLOPPY 0x00 |
| #define ATA_SCSI 0x21 |
| #define ATA_NO_LUN 0x7f |
| |
| typedef union { |
| unsigned all : 8; /* all of the bits together */ |
| struct { |
| #if defined(__LITTLE_ENDIAN_BITFIELD) |
| unsigned head : 4; /* always zeros here */ |
| unsigned unit : 1; /* drive select number: 0/1 */ |
| unsigned bit5 : 1; /* always 1 */ |
| unsigned lba : 1; /* using LBA instead of CHS */ |
| unsigned bit7 : 1; /* always 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/ATAPI device structure : |
| */ |
| struct ata_device { |
| struct ata_channel * channel; |
| char name[6]; /* device name */ |
| |
| unsigned int usage; /* current "open()" count for drive */ |
| char type; /* distingiush different devices: disk, cdrom, tape, floppy, ... */ |
| |
| request_queue_t queue; /* per device request queue */ |
| struct request *rq; /* current request */ |
| |
| unsigned long sleep; /* sleep until this time */ |
| |
| byte retry_pio; /* retrying dma capable host in pio */ |
| byte state; /* retry state */ |
| |
| unsigned using_dma : 1; /* disk is using dma for read/write */ |
| unsigned using_tcq : 1; /* disk is using queueing */ |
| unsigned dsc_overlap : 1; /* flag: DSC overlap */ |
| |
| unsigned busy : 1; /* currently doing revalidate_disk() */ |
| unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */ |
| |
| unsigned present : 1; /* drive is physically present */ |
| unsigned noprobe : 1; /* from: hdx=noprobe */ |
| unsigned removable : 1; /* 1 if need to do check_media_change */ |
| unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */ |
| unsigned nobios : 1; /* flag: do not probe bios for drive */ |
| unsigned revalidate : 1; /* request revalidation */ |
| unsigned atapi_overlap : 1; /* flag: ATAPI overlap (not supported) */ |
| unsigned doorlocking : 1; /* flag: for removable only: door lock/unlock works */ |
| unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */ |
| unsigned remap_0_to_1 : 2; /* 0=remap if ezdrive, 1=remap, 2=noremap */ |
| unsigned ata_flash : 1; /* 1=present, 0=default */ |
| unsigned addressing; /* : 2; 0=28-bit, 1=48-bit, 2=64-bit */ |
| byte scsi; /* 0=default, 1=skip current ide-subdriver for ide-scsi emulation */ |
| |
| select_t select; /* basic drive/head select reg value */ |
| u8 status; /* last retrived status value for device */ |
| |
| byte ready_stat; /* min status value for drive ready */ |
| byte mult_count; /* current multiple sector setting */ |
| byte bad_wstat; /* used for ignoring WRERR_STAT */ |
| byte nowerr; /* used for ignoring WRERR_STAT */ |
| byte sect0; /* offset of first sector for DM6:DDO */ |
| byte head; /* "real" number of heads */ |
| byte sect; /* "real" sectors per track */ |
| byte bios_head; /* BIOS/fdisk/LILO number of heads */ |
| byte 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 */ |
| u64 capacity; /* total number of sectors */ |
| unsigned int drive_data; /* for use by tuneproc/selectproc as needed */ |
| |
| wait_queue_head_t wqueue; /* used to wait for drive in open() */ |
| |
| struct hd_driveid *id; /* drive model identification info */ |
| struct hd_struct *part; /* drive partition table */ |
| |
| struct ata_operations *driver; |
| |
| void *driver_data; /* extra driver data */ |
| devfs_handle_t de; /* directory for device */ |
| |
| char driver_req[10]; /* requests specific driver */ |
| |
| int last_lun; /* last logical unit */ |
| int forced_lun; /* if hdxlun was given at boot */ |
| int lun; /* logical unit */ |
| |
| int crc_count; /* crc counter to reduce drive speed */ |
| byte quirk_list; /* drive is considered quirky if set for a specific host */ |
| byte suspend_reset; /* drive suspend mode flag, soft-reset recovers */ |
| byte current_speed; /* current transfer rate set */ |
| byte dn; /* now wide spread use */ |
| byte wcache; /* status of write cache */ |
| byte acoustic; /* acoustic management */ |
| byte queue_depth; /* max queue depth */ |
| unsigned int failures; /* current failure count */ |
| unsigned int max_failures; /* maximum allowed failure count */ |
| struct device dev; /* global device tree handle */ |
| |
| /* |
| * tcq statistics |
| */ |
| unsigned long immed_rel; |
| unsigned long immed_comp; |
| int max_last_depth; |
| int max_depth; |
| }; |
| |
| /* |
| * Status returned by various functions. |
| */ |
| typedef enum { |
| ATA_OP_FINISHED, /* no drive operation was started */ |
| ATA_OP_CONTINUES, /* a drive operation was started, and a handler was set */ |
| ATA_OP_RELEASED, /* started and released bus */ |
| ATA_OP_READY, /* indicate status poll finished fine */ |
| } ide_startstop_t; |
| |
| /* |
| * Interrupt and timeout handler type. |
| */ |
| typedef ide_startstop_t (ata_handler_t)(struct ata_device *, struct request *); |
| typedef ide_startstop_t (ata_expiry_t)(struct ata_device *, struct request *, unsigned long *); |
| |
| enum { |
| ATA_PRIMARY = 0, |
| ATA_SECONDARY = 1 |
| }; |
| |
| enum { |
| IDE_BUSY, /* awaiting an interrupt */ |
| IDE_SLEEP, |
| IDE_PIO, /* PIO in progress */ |
| IDE_DMA /* DMA in progress */ |
| }; |
| |
| struct ata_channel { |
| struct device dev; /* device handle */ |
| int unit; /* channel number */ |
| |
| /* This lock is used to serialize requests on the same device queue or |
| * between differen queues sharing the same irq line. |
| */ |
| spinlock_t *lock; |
| unsigned long *active; /* active processing request */ |
| ide_startstop_t (*handler)(struct ata_device *, struct request *); /* irq handler, if active */ |
| |
| /* FIXME: Only still used in PDC4030. Localize this code there by |
| * replacing with busy waits. |
| */ |
| struct timer_list timer; /* failsafe timer */ |
| ide_startstop_t (*expiry)(struct ata_device *, struct request *, unsigned long *); /* irq handler, if active */ |
| unsigned long poll_timeout; /* timeout value during polled operations */ |
| |
| struct ata_device *drive; /* last serviced drive */ |
| |
| |
| ide_ioreg_t io_ports[IDE_NR_PORTS]; /* task file registers */ |
| hw_regs_t hw; /* hardware info */ |
| #ifdef CONFIG_PCI |
| struct pci_dev *pci_dev; /* for pci chipsets */ |
| #endif |
| struct ata_device drives[MAX_DRIVES]; /* drive info */ |
| struct gendisk *gd; /* gendisk structure */ |
| |
| /* |
| * Routines to tune PIO and DMA mode for drives. |
| * |
| * A value of 255 indicates that the function should choose the optimal |
| * mode itself. |
| */ |
| |
| /* setup disk on a channel for a particular PIO transfer mode */ |
| void (*tuneproc) (struct ata_device *, byte pio); |
| |
| /* setup the chipset timing for a particular transfer mode */ |
| int (*speedproc) (struct ata_device *, byte pio); |
| |
| /* tweaks hardware to select drive */ |
| void (*selectproc) (struct ata_device *); |
| |
| /* routine to reset controller after a disk reset */ |
| void (*resetproc) (struct ata_device *); |
| |
| /* special interrupt handling for shared pci interrupts */ |
| void (*intrproc) (struct ata_device *); |
| |
| /* special host masking for drive selection */ |
| void (*maskproc) (struct ata_device *); |
| |
| /* check host's drive quirk list */ |
| int (*quirkproc) (struct ata_device *); |
| |
| /* driver soft-power interface */ |
| int (*busproc)(struct ata_device *, int); |
| |
| /* CPU-polled transfer routines */ |
| void (*ata_read)(struct ata_device *, void *, unsigned int); |
| void (*ata_write)(struct ata_device *, void *, unsigned int); |
| void (*atapi_read)(struct ata_device *, void *, unsigned int); |
| void (*atapi_write)(struct ata_device *, void *, unsigned int); |
| |
| int (*udma_setup)(struct ata_device *, int); |
| |
| void (*udma_enable)(struct ata_device *, int, int); |
| void (*udma_start) (struct ata_device *, struct request *); |
| int (*udma_stop) (struct ata_device *); |
| int (*udma_init) (struct ata_device *, struct request *); |
| int (*udma_irq_status) (struct ata_device *); |
| void (*udma_timeout) (struct ata_device *); |
| void (*udma_irq_lost) (struct ata_device *); |
| |
| unsigned int *dmatable_cpu; /* dma physical region descriptor table (cpu view) */ |
| dma_addr_t dmatable_dma; /* dma physical region descriptor table (dma view) */ |
| struct scatterlist *sg_table; /* Scatter-gather list used to build the above */ |
| int sg_nents; /* Current number of entries in it */ |
| int sg_dma_direction; /* dma transfer direction */ |
| unsigned long dma_base; /* base addr for dma ports */ |
| unsigned dma_extra; /* extra addr for dma ports */ |
| unsigned long config_data; /* for use by chipset-specific code */ |
| unsigned long select_data; /* for use by chipset-specific code */ |
| struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ |
| int irq; /* our irq number */ |
| int major; /* our major number */ |
| char name[8]; /* name of interface */ |
| int index; /* 0 for ide0; 1 for ide1; ... */ |
| hwif_chipset_t chipset; /* sub-module for tuning.. */ |
| unsigned noprobe : 1; /* don't probe for this interface */ |
| unsigned present : 1; /* there is a device on this interface */ |
| unsigned serialized : 1; /* serialized operation between channels */ |
| unsigned sharing_irq : 1; /* 1 = sharing irq with another hwif */ |
| unsigned reset : 1; /* reset after probe */ |
| unsigned autodma : 1; /* automatically try to enable DMA at boot */ |
| unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */ |
| unsigned highmem : 1; /* can do full 32-bit dma */ |
| unsigned straight8 : 1; /* Alan's straight 8 check */ |
| unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */ |
| unsigned no_unmask : 1; /* disallow setting unmask bit */ |
| unsigned auto_poll : 1; /* supports nop auto-poll */ |
| unsigned unmask : 1; /* flag: okay to unmask other irqs */ |
| unsigned slow : 1; /* flag: slow data port */ |
| unsigned io_32bit : 1; /* 0=16-bit, 1=32-bit */ |
| unsigned no_atapi_autodma : 1; /* flag: use auto DMA only for disks */ |
| unsigned char bus_state; /* power state of the IDE bus */ |
| int modes_map; /* map of supported transfer modes */ |
| }; |
| |
| /* |
| * Register new hardware with ide |
| */ |
| extern int ide_register_hw(hw_regs_t *hw); |
| extern void ide_unregister(struct ata_channel *); |
| |
| #define IDE_MAX_TAG 32 |
| |
| #ifdef CONFIG_BLK_DEV_IDE_TCQ |
| static inline int ata_pending_commands(struct ata_device *drive) |
| { |
| if (drive->using_tcq) |
| return blk_queue_tag_depth(&drive->queue); |
| |
| return 0; |
| } |
| |
| static inline int ata_can_queue(struct ata_device *drive) |
| { |
| if (drive->using_tcq) |
| return blk_queue_tag_queue(&drive->queue); |
| |
| return 1; |
| } |
| #else |
| # define ata_pending_commands(drive) (0) |
| # define ata_can_queue(drive) (1) |
| #endif |
| |
| /* FIXME: kill this as soon as possible */ |
| #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0; |
| |
| /* |
| * This structure describes the operations possible on a particular device type |
| * (CD-ROM, tape, DISK and so on). |
| * |
| * This is the main hook for device type support submodules. |
| */ |
| |
| struct ata_operations { |
| struct module *owner; |
| void (*attach) (struct ata_device *); |
| int (*cleanup)(struct ata_device *); |
| int (*standby)(struct ata_device *); |
| ide_startstop_t (*do_request)(struct ata_device *, struct request *, sector_t); |
| int (*end_request)(struct ata_device *, struct request *, int); |
| |
| int (*ioctl)(struct ata_device *, struct inode *, struct file *, unsigned int, unsigned long); |
| int (*open)(struct inode *, struct file *, struct ata_device *); |
| void (*release)(struct inode *, struct file *, struct ata_device *); |
| int (*check_media_change)(struct ata_device *); |
| void (*revalidate)(struct ata_device *); |
| |
| sector_t (*capacity)(struct ata_device *); |
| |
| /* linked list of rgistered device type drivers */ |
| struct ata_operations *next; |
| }; |
| |
| /* Alas, no aliases. Too much hassle with bringing module.h everywhere */ |
| #define ata_get(ata) \ |
| (((ata) && (ata)->owner) \ |
| ? ( try_inc_mod_count((ata)->owner) ? (ata) : NULL ) \ |
| : (ata)) |
| |
| #define ata_put(ata) \ |
| do { \ |
| if ((ata) && (ata)->owner) \ |
| __MOD_DEC_USE_COUNT((ata)->owner); \ |
| } while(0) |
| |
| extern sector_t ata_capacity(struct ata_device *drive); |
| |
| extern void unregister_ata_driver(struct ata_operations *driver); |
| extern int register_ata_driver(struct ata_operations *driver); |
| static inline int ata_driver_module(struct ata_operations *driver) |
| { |
| #ifdef MODULE |
| if (register_ata_driver(driver) <= 0) { |
| unregister_ata_driver(driver); |
| return -ENODEV; |
| } |
| #else |
| register_ata_driver(driver); |
| #endif |
| return 0; |
| } |
| |
| #define ata_ops(drive) ((drive)->driver) |
| |
| extern struct ata_channel ide_hwifs[]; /* master data repository */ |
| extern int noautodma; |
| |
| /* |
| * We need blk.h, but we replace its end_request by our own version. |
| */ |
| #define IDE_DRIVER /* Toggle some magic bits in blk.h */ |
| #define LOCAL_END_REQUEST /* Don't generate end_request in blk.h */ |
| #define DEVICE_NR(device) (minor(device) >> PARTN_BITS) |
| #include <linux/blk.h> |
| |
| extern int ata_end_request(struct ata_device *, struct request *, int, unsigned int); |
| extern void ata_set_handler(struct ata_device *drive, ata_handler_t handler, |
| unsigned long timeout, ata_expiry_t expiry); |
| |
| extern u8 ata_dump(struct ata_device *, struct request *, const char *); |
| extern ide_startstop_t ata_error(struct ata_device *, struct request *rq, const char *); |
| |
| extern void ide_fixstring(char *s, const int bytecount, const int byteswap); |
| |
| /* |
| * This routine is called from the partition-table code in genhd.c |
| * to "convert" a drive to a logical geometry with fewer than 1024 cyls. |
| */ |
| int ide_xlate_1024(kdev_t, int, int, const char *); |
| |
| /* |
| * Convert kdev_t structure into struct ata_device * one. |
| */ |
| struct ata_device *get_info_ptr(kdev_t i_rdev); |
| |
| /* |
| * temporarily mapping a (possible) highmem bio for PIO transfer |
| */ |
| #define ide_rq_offset(rq) (((rq)->hard_cur_sectors - (rq)->current_nr_sectors) << 9) |
| |
| struct ata_taskfile { |
| struct hd_drive_task_hdr taskfile; |
| struct hd_drive_task_hdr hobfile; |
| u8 cmd; /* actual ATA command */ |
| int command_type; |
| ide_startstop_t (*XXX_handler)(struct ata_device *, struct request *); |
| }; |
| |
| extern void ata_read(struct ata_device *, void *, unsigned int); |
| extern void ata_write(struct ata_device *, void *, unsigned int); |
| |
| extern int ide_raw_taskfile(struct ata_device *, struct ata_taskfile *, char *); |
| extern int ide_config_drive_speed(struct ata_device *, byte); |
| extern byte eighty_ninty_three(struct ata_device *); |
| |
| extern void ide_stall_queue(struct ata_device *, unsigned long); |
| |
| extern int system_bus_speed; |
| |
| /* |
| * CompactFlash cards and their brethern pretend to be removable hard disks, |
| * but they never have a slave unit, and they don't have doorlock mechanisms. |
| * This test catches them, and is invoked elsewhere when setting appropriate |
| * config bits. |
| */ |
| |
| extern int drive_is_flashcard(struct ata_device *); |
| |
| int ide_spin_wait_hwgroup(struct ata_device *); |
| void ide_timer_expiry (unsigned long data); |
| extern void ata_irq_request(int irq, void *data, struct pt_regs *regs); |
| void do_ide_request (request_queue_t * q); |
| void ide_init_subdrivers (void); |
| |
| extern struct block_device_operations ide_fops[]; |
| |
| /* Probe for devices attached to the systems host controllers. |
| */ |
| extern int ideprobe_init(void); |
| #ifdef CONFIG_BLK_DEV_IDEDISK |
| extern int idedisk_init (void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDECD |
| extern int ide_cdrom_init (void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDETAPE |
| extern int idetape_init (void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDEFLOPPY |
| extern int idefloppy_init (void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDESCSI |
| extern int idescsi_init (void); |
| #endif |
| |
| extern int ide_register_subdriver(struct ata_device *, struct ata_operations *); |
| extern int ide_unregister_subdriver(struct ata_device *drive); |
| extern int ata_revalidate(kdev_t i_rdev); |
| extern void ide_driver_module(void); |
| |
| #ifdef CONFIG_PCI |
| # define ON_BOARD 0 |
| # define NEVER_BOARD 1 |
| # ifdef CONFIG_BLK_DEV_OFFBOARD |
| # define OFF_BOARD ON_BOARD |
| # else |
| # define OFF_BOARD NEVER_BOARD |
| # endif |
| |
| void __init ide_scan_pcibus(int scan_direction); |
| #endif |
| |
| static inline void udma_enable(struct ata_device *drive, int on, int verbose) |
| { |
| drive->channel->udma_enable(drive, on, verbose); |
| } |
| |
| static inline void udma_start(struct ata_device *drive, struct request *rq) |
| { |
| drive->channel->udma_start(drive, rq); |
| } |
| |
| static inline int udma_stop(struct ata_device *drive) |
| { |
| int ret; |
| |
| ret = drive->channel->udma_stop(drive); |
| clear_bit(IDE_DMA, drive->channel->active); |
| |
| return ret; |
| } |
| |
| /* |
| * Initiate actual DMA data transfer. The direction is encoded in the request. |
| */ |
| static inline ide_startstop_t udma_init(struct ata_device *drive, struct request *rq) |
| { |
| int ret; |
| |
| set_bit(IDE_DMA, drive->channel->active); |
| ret = drive->channel->udma_init(drive, rq); |
| if (ret != ATA_OP_CONTINUES) |
| clear_bit(IDE_DMA, drive->channel->active); |
| |
| return ret; |
| } |
| |
| static inline int udma_irq_status(struct ata_device *drive) |
| { |
| return drive->channel->udma_irq_status(drive); |
| } |
| |
| static inline void udma_timeout(struct ata_device *drive) |
| { |
| return drive->channel->udma_timeout(drive); |
| } |
| |
| static inline void udma_irq_lost(struct ata_device *drive) |
| { |
| return drive->channel->udma_irq_lost(drive); |
| } |
| |
| #ifdef CONFIG_BLK_DEV_IDEDMA |
| |
| extern void udma_pci_enable(struct ata_device *drive, int on, int verbose); |
| extern void udma_pci_start(struct ata_device *drive, struct request *rq); |
| extern int udma_pci_stop(struct ata_device *drive); |
| extern int udma_pci_init(struct ata_device *drive, struct request *rq); |
| extern int udma_pci_irq_status(struct ata_device *drive); |
| extern void udma_pci_timeout(struct ata_device *drive); |
| extern void udma_pci_irq_lost(struct ata_device *); |
| extern int udma_pci_setup(struct ata_device *, int); |
| |
| extern int udma_generic_setup(struct ata_device *, int); |
| |
| extern int udma_new_table(struct ata_device *, struct request *); |
| extern void udma_destroy_table(struct ata_channel *); |
| extern void udma_print(struct ata_device *); |
| |
| extern int udma_black_list(struct ata_device *); |
| extern int udma_white_list(struct ata_device *); |
| |
| extern ide_startstop_t udma_tcq_init(struct ata_device *, struct request *); |
| extern int udma_tcq_enable(struct ata_device *, int); |
| |
| extern ide_startstop_t ide_dma_intr(struct ata_device *, struct request *); |
| extern int check_drive_lists(struct ata_device *, int good_bad); |
| extern void ide_release_dma(struct ata_channel *); |
| extern int ata_start_dma(struct ata_device *, struct request *rq); |
| |
| extern void ata_init_dma(struct ata_channel *, unsigned long) __init; |
| |
| #endif |
| |
| extern void ata_fix_driveid(struct hd_driveid *); |
| |
| extern spinlock_t ide_lock; |
| |
| #define DRIVE_LOCK(drive) ((drive)->queue.queue_lock) |
| |
| /* Low level device access functions. */ |
| |
| extern void ata_select(struct ata_device *, unsigned long); |
| extern void ata_mask(struct ata_device *); |
| extern int ata_status(struct ata_device *, u8, u8); |
| extern int ata_status_irq(struct ata_device *drive); |
| extern int ata_status_poll( struct ata_device *, u8, u8, |
| unsigned long, struct request *rq); |
| |
| extern int ata_irq_enable(struct ata_device *, int); |
| extern void ata_reset(struct ata_channel *); |
| extern void ata_out_regfile(struct ata_device *, struct hd_drive_task_hdr *); |
| extern void ata_in_regfile(struct ata_device *, struct hd_drive_task_hdr *); |
| |
| #endif |
