4 * linux/include/linux/ide.h
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
9 #include <linux/config.h>
10 #include <linux/init.h>
11 #include <linux/ioport.h>
12 #include <linux/hdreg.h>
13 #include <linux/hdsmart.h>
14 #include <linux/blkdev.h>
15 #include <linux/proc_fs.h>
16 #include <linux/interrupt.h>
17 #include <linux/bitops.h>
18 #include <linux/bio.h>
19 #include <linux/device.h>
20 #include <linux/pci.h>
21 #include <asm/byteorder.h>
22 #include <asm/system.h>
24 #include <asm/semaphore.h>
27 * This is the multiple IDE interface driver, as evolved from hd.c.
28 * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
29 * There can be up to two drives per interface, as per the ATA-2 spec.
31 * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64
32 * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
33 * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64
34 * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64
37 /******************************************************************************
38 * IDE driver configuration options (play with these as desired):
40 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
42 #define REALLY_FAST_IO /* define if ide ports are perfect */
43 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
45 #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
46 #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
48 #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
49 #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
51 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
52 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
55 #ifndef DISABLE_IRQ_NOSYNC
56 #define DISABLE_IRQ_NOSYNC 0
60 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
64 #define IDE_NO_IRQ (-1)
67 * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
69 #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
71 #define IDE_DRIVE_TASK 98
74 * IDE_DRIVE_TASKFILE is used to implement many features needed for raw tasks
76 #define IDE_DRIVE_TASKFILE 97
79 * "No user-serviceable parts" beyond this point :)
80 *****************************************************************************/
82 typedef unsigned char byte; /* used everywhere */
85 * Probably not wise to fiddle with these
87 #define ERROR_MAX 8 /* Max read/write errors per sector */
88 #define ERROR_RESET 3 /* Reset controller every 4th retry */
89 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
94 #define IDE_TUNE_NOAUTO 2
95 #define IDE_TUNE_AUTO 1
96 #define IDE_TUNE_DEFAULT 0
102 #define DMA_PIO_RETRY 1 /* retrying in PIO */
105 * Ensure that various configuration flags have compatible settings
107 #ifdef REALLY_SLOW_IO
108 #undef REALLY_FAST_IO
111 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
112 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
115 * Definitions for accessing IDE controller registers
117 #define IDE_NR_PORTS (10)
119 #define IDE_DATA_OFFSET (0)
120 #define IDE_ERROR_OFFSET (1)
121 #define IDE_NSECTOR_OFFSET (2)
122 #define IDE_SECTOR_OFFSET (3)
123 #define IDE_LCYL_OFFSET (4)
124 #define IDE_HCYL_OFFSET (5)
125 #define IDE_SELECT_OFFSET (6)
126 #define IDE_STATUS_OFFSET (7)
127 #define IDE_CONTROL_OFFSET (8)
128 #define IDE_IRQ_OFFSET (9)
130 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
131 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
133 #define IDE_CONTROL_OFFSET_HOB (7)
135 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
136 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
137 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
138 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
139 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
140 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
141 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
142 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
143 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
144 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
146 #define IDE_FEATURE_REG IDE_ERROR_REG
147 #define IDE_COMMAND_REG IDE_STATUS_REG
148 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
149 #define IDE_IREASON_REG IDE_NSECTOR_REG
150 #define IDE_BCOUNTL_REG IDE_LCYL_REG
151 #define IDE_BCOUNTH_REG IDE_HCYL_REG
153 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
154 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
155 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
156 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
157 #define DRIVE_READY (READY_STAT | SEEK_STAT)
158 #define DATA_READY (DRQ_STAT)
160 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
162 #define SATA_NR_PORTS (3) /* 16 possible ?? */
164 #define SATA_STATUS_OFFSET (0)
165 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
166 #define SATA_ERROR_OFFSET (1)
167 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
168 #define SATA_CONTROL_OFFSET (2)
169 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
171 #define SATA_MISC_OFFSET (0)
172 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
173 #define SATA_PHY_OFFSET (1)
174 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
175 #define SATA_IEN_OFFSET (2)
176 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
179 * Our Physical Region Descriptor (PRD) table should be large enough
180 * to handle the biggest I/O request we are likely to see. Since requests
181 * can have no more than 256 sectors, and since the typical blocksize is
182 * two or more sectors, we could get by with a limit of 128 entries here for
183 * the usual worst case. Most requests seem to include some contiguous blocks,
184 * further reducing the number of table entries required.
186 * The driver reverts to PIO mode for individual requests that exceed
187 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
188 * 100% of all crazy scenarios here is not necessary.
190 * As it turns out though, we must allocate a full 4KB page for this,
191 * so the two PRD tables (ide0 & ide1) will each get half of that,
192 * allowing each to have about 256 entries (8 bytes each) from this.
195 #define PRD_ENTRIES 256
198 * Some more useful definitions
200 #define IDE_MAJOR_NAME "hd" /* the same for all i/f; see also genhd.c */
201 #define MAJOR_NAME IDE_MAJOR_NAME
202 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
203 #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */
204 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
205 #define SECTOR_SIZE 512
206 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
207 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
210 * Timeouts for various operations:
212 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
213 #if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE)
214 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
216 #define WAIT_READY (HZ/10) /* 100msec - should be instantaneous */
217 #endif /* CONFIG_APM || CONFIG_APM_MODULE */
218 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
219 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
220 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
221 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
223 #define HOST(hwif,chipset) \
225 return ((hwif)->chipset == chipset) ? 1 : 0; \
229 * Check for an interrupt and acknowledge the interrupt status
232 typedef int (ide_ack_intr_t)(struct hwif_s *);
239 * hwif_chipset_t is used to keep track of the specific hardware
240 * chipset used by each IDE interface, if known.
242 typedef enum { ide_unknown, ide_generic, ide_pci,
243 ide_cmd640, ide_dtc2278, ide_ali14xx,
244 ide_qd65xx, ide_umc8672, ide_ht6560b,
245 ide_pdc4030, ide_rz1000, ide_trm290,
246 ide_cmd646, ide_cy82c693, ide_4drives,
247 ide_pmac, ide_etrax100, ide_acorn,
252 * Structure to hold all information about the location of this port
254 typedef struct hw_regs_s {
255 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
256 int irq; /* our irq number */
257 int dma; /* our dma entry */
258 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
259 void *priv; /* interface specific data */
260 hwif_chipset_t chipset;
261 unsigned long sata_scr[SATA_NR_PORTS];
262 unsigned long sata_misc[SATA_NR_PORTS];
266 * Register new hardware with ide
268 int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
269 int ide_register_hw_with_fixup(hw_regs_t *hw, struct hwif_s **hwifp, void (*fixup)(struct hwif_s *));
272 * Set up hw_regs_t structure before calling ide_register_hw (optional)
274 void ide_setup_ports( hw_regs_t *hw,
279 ide_ack_intr_t *ack_intr,
285 static inline void ide_std_init_ports(hw_regs_t *hw,
286 unsigned long io_addr,
287 unsigned long ctl_addr)
291 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
292 hw->io_ports[i] = io_addr++;
294 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
299 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
300 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
301 # define ide_default_io_base(index) (0)
302 # define ide_default_irq(base) (0)
303 # define ide_init_default_irq(base) (0)
307 * ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series.
308 * New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>.
310 #ifdef IDE_ARCH_OBSOLETE_INIT
311 static inline void ide_init_hwif_ports(hw_regs_t *hw,
312 unsigned long io_addr,
313 unsigned long ctl_addr,
317 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
319 ide_std_init_ports(hw, io_addr, ctl_addr);
324 hw->io_ports[IDE_IRQ_OFFSET] = 0;
327 if (ppc_ide_md.ide_init_hwif)
328 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
332 static inline void ide_init_hwif_ports(hw_regs_t *hw,
333 unsigned long io_addr,
334 unsigned long ctl_addr,
337 if (io_addr || ctl_addr)
338 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
340 #endif /* IDE_ARCH_OBSOLETE_INIT */
342 /* Currently only m68k, apus and m8xx need it */
343 #ifndef IDE_ARCH_ACK_INTR
344 # define ide_ack_intr(hwif) (1)
347 /* Currently only Atari needs it */
348 #ifndef IDE_ARCH_LOCK
349 # define ide_release_lock() do {} while (0)
350 # define ide_get_lock(hdlr, data) do {} while (0)
351 #endif /* IDE_ARCH_LOCK */
354 * Now for the data we need to maintain per-drive: ide_drive_t
357 #define ide_scsi 0x21
358 #define ide_disk 0x20
359 #define ide_optical 0x7
360 #define ide_cdrom 0x5
362 #define ide_floppy 0x0
365 * Special Driver Flags
367 * set_geometry : respecify drive geometry
368 * recalibrate : seek to cyl 0
369 * set_multmode : set multmode count
370 * set_tune : tune interface for drive
371 * serviced : service command
377 #if defined(__LITTLE_ENDIAN_BITFIELD)
378 unsigned set_geometry : 1;
379 unsigned recalibrate : 1;
380 unsigned set_multmode : 1;
381 unsigned set_tune : 1;
382 unsigned serviced : 1;
383 unsigned reserved : 3;
384 #elif defined(__BIG_ENDIAN_BITFIELD)
385 unsigned reserved : 3;
386 unsigned serviced : 1;
387 unsigned set_tune : 1;
388 unsigned set_multmode : 1;
389 unsigned recalibrate : 1;
390 unsigned set_geometry : 1;
392 #error "Please fix <asm/byteorder.h>"
398 * ATA DATA Register Special.
399 * ATA NSECTOR Count Register().
400 * ATAPI Byte Count Register.
401 * Channel index ordering pairs.
406 #if defined(__LITTLE_ENDIAN_BITFIELD)
407 unsigned low :8; /* LSB */
408 unsigned high :8; /* MSB */
409 #elif defined(__BIG_ENDIAN_BITFIELD)
410 unsigned high :8; /* MSB */
411 unsigned low :8; /* LSB */
413 #error "Please fix <asm/byteorder.h>"
416 } ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
419 * ATA-IDE Error Register
421 * mark : Bad address mark
422 * tzero : Couldn't find track 0
423 * abrt : Aborted Command
424 * mcr : Media Change Request
425 * id : ID field not found
426 * mce : Media Change Event
427 * ecc : Uncorrectable ECC error
433 #if defined(__LITTLE_ENDIAN_BITFIELD)
442 #elif defined(__BIG_ENDIAN_BITFIELD)
452 #error "Please fix <asm/byteorder.h>"
458 * ATA-IDE Select Register, aka Device-Head
460 * head : always zeros here
461 * unit : drive select number: 0/1
463 * lba : using LBA instead of CHS
469 #if defined(__LITTLE_ENDIAN_BITFIELD)
475 #elif defined(__BIG_ENDIAN_BITFIELD)
482 #error "Please fix <asm/byteorder.h>"
485 } select_t, ata_select_t;
488 * The ATA-IDE Status Register.
489 * The ATAPI Status Register.
491 * check : Error occurred
493 * corr : Correctable error occurred
494 * drq : Data is request by the device
495 * dsc : Disk Seek Complete : ata
496 * : Media access command finished : atapi
497 * df : Device Fault : ata
499 * drdy : Ready, Command Mode Capable : ata
500 * : Ignored for ATAPI commands : atapi
502 * : The device has access to the command block
507 #if defined(__LITTLE_ENDIAN_BITFIELD)
516 #elif defined(__BIG_ENDIAN_BITFIELD)
526 #error "Please fix <asm/byteorder.h>"
529 } ata_status_t, atapi_status_t;
532 * ATA-IDE Control Register
534 * bit0 : Should be set to zero
535 * nIEN : device INTRQ to host
536 * SRST : host soft reset bit
537 * bit3 : ATA-2 thingy, Should be set to 1
538 * reserved456 : Reserved
539 * HOB : 48-bit address ordering, High Ordered Bit
544 #if defined(__LITTLE_ENDIAN_BITFIELD)
549 unsigned reserved456 : 3;
551 #elif defined(__BIG_ENDIAN_BITFIELD)
553 unsigned reserved456 : 3;
559 #error "Please fix <asm/byteorder.h>"
565 * ATAPI Feature Register
567 * dma : Using DMA or PIO
568 * reserved321 : Reserved
569 * reserved654 : Reserved (Tag Type)
570 * reserved7 : Reserved
575 #if defined(__LITTLE_ENDIAN_BITFIELD)
577 unsigned reserved321 :3;
578 unsigned reserved654 :3;
579 unsigned reserved7 :1;
580 #elif defined(__BIG_ENDIAN_BITFIELD)
581 unsigned reserved7 :1;
582 unsigned reserved654 :3;
583 unsigned reserved321 :3;
586 #error "Please fix <asm/byteorder.h>"
592 * ATAPI Interrupt Reason Register.
594 * cod : Information transferred is command (1) or data (0)
595 * io : The device requests us to read (1) or write (0)
596 * reserved : Reserved
601 #if defined(__LITTLE_ENDIAN_BITFIELD)
604 unsigned reserved :6;
605 #elif defined(__BIG_ENDIAN_BITFIELD)
606 unsigned reserved :6;
610 #error "Please fix <asm/byteorder.h>"
616 * The ATAPI error register.
618 * ili : Illegal Length Indication
619 * eom : End Of Media Detected
620 * abrt : Aborted command - As defined by ATA
621 * mcr : Media Change Requested - As defined by ATA
622 * sense_key : Sense key of the last failed packet command
627 #if defined(__LITTLE_ENDIAN_BITFIELD)
632 unsigned sense_key :4;
633 #elif defined(__BIG_ENDIAN_BITFIELD)
634 unsigned sense_key :4;
640 #error "Please fix <asm/byteorder.h>"
646 * ATAPI floppy Drive Select Register
648 * sam_lun : Logical unit number
649 * reserved3 : Reserved
650 * drv : The responding drive will be drive 0 (0) or drive 1 (1)
651 * one5 : Should be set to 1
652 * reserved6 : Reserved
653 * one7 : Should be set to 1
658 #if defined(__LITTLE_ENDIAN_BITFIELD)
660 unsigned reserved3 :1;
663 unsigned reserved6 :1;
665 #elif defined(__BIG_ENDIAN_BITFIELD)
667 unsigned reserved6 :1;
670 unsigned reserved3 :1;
673 #error "Please fix <asm/byteorder.h>"
679 * Status returned from various ide_ functions
682 ide_stopped, /* no drive operation was started */
683 ide_started, /* a drive operation was started, handler was set */
687 struct ide_settings_s;
689 typedef struct ide_drive_s {
690 char name[4]; /* drive name, such as "hda" */
691 char driver_req[10]; /* requests specific driver */
693 request_queue_t *queue; /* request queue */
695 struct request *rq; /* current request */
696 struct ide_drive_s *next; /* circular list of hwgroup drives */
697 struct ide_driver_s *driver;/* (ide_driver_t *) */
698 void *driver_data; /* extra driver data */
699 struct hd_driveid *id; /* drive model identification info */
700 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
701 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
702 char devfs_name[64]; /* devfs crap */
704 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
706 unsigned long sleep; /* sleep until this time */
707 unsigned long service_start; /* time we started last request */
708 unsigned long service_time; /* service time of last request */
709 unsigned long timeout; /* max time to wait for irq */
711 special_t special; /* special action flags */
712 select_t select; /* basic drive/head select reg value */
714 u8 keep_settings; /* restore settings after drive reset */
715 u8 autodma; /* device can safely use dma on host */
716 u8 using_dma; /* disk is using dma for read/write */
717 u8 retry_pio; /* retrying dma capable host in pio */
718 u8 state; /* retry state */
719 u8 waiting_for_dma; /* dma currently in progress */
720 u8 unmask; /* okay to unmask other irqs */
721 u8 bswap; /* byte swap data */
722 u8 dsc_overlap; /* DSC overlap */
723 u8 nice1; /* give potential excess bandwidth */
725 unsigned present : 1; /* drive is physically present */
726 unsigned dead : 1; /* device ejected hint */
727 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
728 unsigned noprobe : 1; /* from: hdx=noprobe */
729 unsigned removable : 1; /* 1 if need to do check_media_change */
730 unsigned attach : 1; /* needed for removable devices */
731 unsigned is_flash : 1; /* 1 if probed as flash */
732 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
733 unsigned no_unmask : 1; /* disallow setting unmask bit */
734 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
735 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
736 unsigned nice0 : 1; /* give obvious excess bandwidth */
737 unsigned nice2 : 1; /* give a share in our own bandwidth */
738 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
739 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
740 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
741 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
742 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
743 unsigned stroke : 1; /* from: hdx=stroke */
744 unsigned addressing; /* : 3;
747 * 2=48-bit doing 28-bit
750 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
752 u8 quirk_list; /* considered quirky, set for a specific host */
753 u8 suspend_reset; /* drive suspend mode flag, soft-reset recovers */
754 u8 init_speed; /* transfer rate set at boot */
755 u8 pio_speed; /* unused by core, used by some drivers for fallback from DMA */
756 u8 current_speed; /* current transfer rate set */
757 u8 dn; /* now wide spread use */
758 u8 wcache; /* status of write cache */
759 u8 acoustic; /* acoustic management */
760 u8 media; /* disk, cdrom, tape, floppy, ... */
761 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
762 u8 ready_stat; /* min status value for drive ready */
763 u8 mult_count; /* current multiple sector setting */
764 u8 mult_req; /* requested multiple sector setting */
765 u8 tune_req; /* requested drive tuning setting */
766 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
767 u8 bad_wstat; /* used for ignoring WRERR_STAT */
768 u8 nowerr; /* used for ignoring WRERR_STAT */
769 u8 sect0; /* offset of first sector for DM6:DDO */
770 u8 head; /* "real" number of heads */
771 u8 sect; /* "real" sectors per track */
772 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
773 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
774 u8 doing_barrier; /* state, 1=currently doing flush */
776 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
777 unsigned int cyl; /* "real" number of cyls */
778 unsigned int drive_data; /* use by tuneproc/selectproc */
779 unsigned int usage; /* current "open()" count for drive */
780 unsigned int failures; /* current failure count */
781 unsigned int max_failures; /* maximum allowed failure count */
783 u64 capacity64; /* total number of sectors */
784 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
786 int lun; /* logical unit */
787 int crc_count; /* crc counter to reduce drive speed */
788 struct list_head list;
789 struct device gendev;
790 struct semaphore gendev_rel_sem; /* to deal with device release() */
791 struct gendisk *disk;
795 * mapping stuff, prepare for highmem...
797 * temporarily mapping a (possible) highmem bio for PIO transfer
799 #ifndef CONFIG_IDE_TASKFILE_IO
801 #define ide_rq_offset(rq) \
802 (((rq)->hard_cur_sectors - (rq)->current_nr_sectors) << 9)
804 static inline void *ide_map_buffer(struct request *rq, unsigned long *flags)
806 return bio_kmap_irq(rq->bio, flags) + ide_rq_offset(rq);
809 static inline void ide_unmap_buffer(struct request *rq, char *buffer, unsigned long *flags)
811 bio_kunmap_irq(buffer, flags);
813 #endif /* !CONFIG_IDE_TASKFILE_IO */
815 #define IDE_CHIPSET_PCI_MASK \
816 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
817 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
819 struct ide_pci_device_s;
822 typedef struct hwif_s {
823 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
824 struct hwif_s *mate; /* other hwif from same PCI chip */
825 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
826 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
828 u16 key; /* /proc persistent keying */
829 char name[6]; /* name of interface, eg. "ide0" */
831 /* task file registers for pata and sata */
832 unsigned long io_ports[IDE_NR_PORTS];
833 unsigned long sata_scr[SATA_NR_PORTS];
834 unsigned long sata_misc[SATA_NR_PORTS];
836 hw_regs_t hw; /* Hardware info */
837 ide_drive_t drives[MAX_DRIVES]; /* drive info */
839 u8 major; /* our major number */
840 u8 index; /* 0 for ide0; 1 for ide1; ... */
841 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
842 u8 straight8; /* Alan's straight 8 check */
843 u8 bus_state; /* power state of the IDE bus */
845 u8 atapi_dma; /* host supports atapi_dma */
850 hwif_chipset_t chipset; /* sub-module for tuning.. */
852 struct pci_dev *pci_dev; /* for pci chipsets */
853 struct ide_pci_device_s *cds; /* chipset device struct */
855 ide_startstop_t (*rw_disk)(ide_drive_t *, struct request *, sector_t);
858 ide_hwif_ops_t *hwifops;
860 /* routine is for HBA specific IDENTITY operations */
861 int (*identify)(ide_drive_t *);
862 /* routine to tune PIO mode for drives */
863 void (*tuneproc)(ide_drive_t *, u8);
864 /* routine to retune DMA modes for drives */
865 int (*speedproc)(ide_drive_t *, u8);
866 /* tweaks hardware to select drive */
867 void (*selectproc)(ide_drive_t *);
868 /* chipset polling based on hba specifics */
869 int (*reset_poll)(ide_drive_t *);
870 /* chipset specific changes to default for device-hba resets */
871 void (*pre_reset)(ide_drive_t *);
872 /* routine to reset controller after a disk reset */
873 void (*resetproc)(ide_drive_t *);
874 /* special interrupt handling for shared pci interrupts */
875 void (*intrproc)(ide_drive_t *);
876 /* special host masking for drive selection */
877 void (*maskproc)(ide_drive_t *, int);
878 /* check host's drive quirk list */
879 int (*quirkproc)(ide_drive_t *);
880 /* driver soft-power interface */
881 int (*busproc)(ide_drive_t *, int);
882 // /* host rate limiter */
883 // u8 (*ratemask)(ide_drive_t *);
884 // /* device rate limiter */
885 // u8 (*ratefilter)(ide_drive_t *, u8);
886 /* hwif remove hook, called on unload/pci remove paths*/
887 void (*remove)(struct hwif_s *);
888 /* allow command filter/control */
889 int (*raw_taskfile)(ide_drive_t *, struct ide_task_s *, u8 *);
892 void (*ata_input_data)(ide_drive_t *, void *, u32);
893 void (*ata_output_data)(ide_drive_t *, void *, u32);
895 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
896 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
898 int (*ide_dma_read)(ide_drive_t *drive);
899 int (*ide_dma_write)(ide_drive_t *drive);
900 int (*ide_dma_begin)(ide_drive_t *drive);
901 int (*ide_dma_end)(ide_drive_t *drive);
902 int (*ide_dma_check)(ide_drive_t *drive);
903 int (*ide_dma_on)(ide_drive_t *drive);
904 int (*ide_dma_off_quietly)(ide_drive_t *drive);
905 int (*ide_dma_test_irq)(ide_drive_t *drive);
906 int (*ide_dma_host_on)(ide_drive_t *drive);
907 int (*ide_dma_host_off)(ide_drive_t *drive);
908 int (*ide_dma_verbose)(ide_drive_t *drive);
909 int (*ide_dma_lostirq)(ide_drive_t *drive);
910 int (*ide_dma_timeout)(ide_drive_t *drive);
912 void (*OUTB)(u8 addr, unsigned long port);
913 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
914 void (*OUTW)(u16 addr, unsigned long port);
915 void (*OUTL)(u32 addr, unsigned long port);
916 void (*OUTSW)(unsigned long port, void *addr, u32 count);
917 void (*OUTSL)(unsigned long port, void *addr, u32 count);
919 u8 (*INB)(unsigned long port);
920 u16 (*INW)(unsigned long port);
921 u32 (*INL)(unsigned long port);
922 void (*INSW)(unsigned long port, void *addr, u32 count);
923 void (*INSL)(unsigned long port, void *addr, u32 count);
925 /* dma physical region descriptor table (cpu view) */
926 unsigned int *dmatable_cpu;
927 /* dma physical region descriptor table (dma view) */
928 dma_addr_t dmatable_dma;
929 /* Scatter-gather list used to build the above */
930 struct scatterlist *sg_table;
931 int sg_nents; /* Current number of entries in it */
932 int sg_dma_direction; /* dma transfer direction */
934 /* data phase of the active command (currently only valid for PIO/DMA) */
937 int mmio; /* hosts iomio (0) or custom (2) select */
938 int rqsize; /* max sectors per request */
939 int irq; /* our irq number */
941 unsigned long dma_master; /* reference base addr dmabase */
942 unsigned long dma_base; /* base addr for dma ports */
943 unsigned long dma_command; /* dma command register */
944 unsigned long dma_vendor1; /* dma vendor 1 register */
945 unsigned long dma_status; /* dma status register */
946 unsigned long dma_vendor3; /* dma vendor 3 register */
947 unsigned long dma_prdtable; /* actual prd table address */
948 unsigned long dma_base2; /* extended base addr for dma ports */
950 unsigned dma_extra; /* extra addr for dma ports */
951 unsigned long config_data; /* for use by chipset-specific code */
952 unsigned long select_data; /* for use by chipset-specific code */
954 unsigned noprobe : 1; /* don't probe for this interface */
955 unsigned present : 1; /* this interface exists */
956 unsigned configured : 1; /* this hwif exists and is set up (may not be "present") */
957 unsigned hold : 1; /* this interface is always present */
958 unsigned user_dev : 1; /* user ioctl created device */
959 unsigned serialized : 1; /* serialized all channel operation */
960 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
961 unsigned reset : 1; /* reset after probe */
962 unsigned autodma : 1; /* auto-attempt using DMA at boot */
963 unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
964 unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */
965 unsigned no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
966 unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */
967 unsigned auto_poll : 1; /* supports nop auto-poll */
969 struct device gendev;
970 struct semaphore gendev_rel_sem; /* To deal with device release() */
972 void *hwif_data; /* extra hwif data */
976 void (*led_act)(void *data, int rw);
980 * internal ide interrupt handler type
982 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
983 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
984 typedef int (ide_expiry_t)(ide_drive_t *);
986 typedef struct hwgroup_s {
987 /* irq handler, if active */
988 ide_startstop_t (*handler)(ide_drive_t *);
989 /* irq handler, suspended if active */
990 ide_startstop_t (*handler_save)(ide_drive_t *);
991 /* BOOL: protects all fields below */
993 /* BOOL: wake us up on timer expiry */
997 /* ptr to current hwif in linked-list */
1000 /* for pci chipsets */
1001 struct pci_dev *pci_dev;
1002 /* chipset device struct */
1003 struct ide_pci_device_s *cds;
1005 /* current request */
1007 /* failsafe timer */
1008 struct timer_list timer;
1009 /* local copy of current write rq */
1011 /* timeout value during long polls */
1012 unsigned long poll_timeout;
1013 /* queried upon timeouts */
1014 int (*expiry)(ide_drive_t *);
1015 /* ide_system_bus_speed */
1018 unsigned char cmd_buf[4];
1021 /* structure attached to the request for IDE_TASK_CMDS */
1024 * configurable drive settings
1030 #define TYPE_SHORT 3
1032 #define SETTING_READ (1 << 0)
1033 #define SETTING_WRITE (1 << 1)
1034 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
1036 typedef int (ide_procset_t)(ide_drive_t *, int);
1037 typedef struct ide_settings_s {
1050 struct ide_settings_s *next;
1053 extern struct semaphore ide_setting_sem;
1054 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);
1055 extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
1056 extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
1057 extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
1058 extern void ide_add_generic_settings(ide_drive_t *drive);
1060 extern void *ide_drive_to_key(ide_drive_t *drive);
1061 extern ide_drive_t *ide_drive_from_key(void *);
1062 extern void *ide_hwif_to_key(ide_hwif_t *hwif);
1063 extern ide_hwif_t *ide_hwif_from_key(void *);
1066 * /proc/ide interface
1071 read_proc_t *read_proc;
1072 write_proc_t *write_proc;
1075 #ifdef CONFIG_PROC_FS
1076 extern struct proc_dir_entry *proc_ide_root;
1078 extern void proc_ide_create(void);
1079 extern void proc_ide_destroy(void);
1080 extern void destroy_proc_ide_drives(ide_hwif_t *);
1081 extern void destroy_proc_ide_interface(ide_hwif_t *);
1082 extern void create_proc_ide_interfaces(void);
1083 extern void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
1084 extern void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
1085 read_proc_t proc_ide_read_capacity;
1086 read_proc_t proc_ide_read_geometry;
1088 #ifdef CONFIG_BLK_DEV_IDEPCI
1089 void ide_pci_create_host_proc(const char *, get_info_t *);
1093 * Standard exit stuff:
1095 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
1098 if (len < count) { \
1104 *start = page + off; \
1108 static inline void create_proc_ide_interfaces(void) { ; }
1109 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
1113 * Power Management step value (rq->pm->pm_step).
1115 * The step value starts at 0 (ide_pm_state_start_suspend) for a
1116 * suspend operation or 1000 (ide_pm_state_start_resume) for a
1119 * For each step, the core calls the subdriver start_power_step() first.
1121 * - ide_stopped : In this case, the core calls us back again unless
1122 * step have been set to ide_power_state_completed.
1123 * - ide_started : In this case, the channel is left busy until an
1124 * async event (interrupt) occurs.
1125 * Typically, start_power_step() will issue a taskfile request with
1128 * Upon reception of the interrupt, the core will call complete_power_step()
1129 * with the error code if any. This routine should update the step value
1130 * and return. It should not start a new request. The core will call
1131 * start_power_step for the new step value, unless step have been set to
1132 * ide_power_state_completed.
1134 * Subdrivers are expected to define their own additional power
1135 * steps from 1..999 for suspend and from 1001..1999 for resume,
1136 * other values are reserved for future use.
1140 ide_pm_state_completed = -1,
1141 ide_pm_state_start_suspend = 0,
1142 ide_pm_state_start_resume = 1000,
1146 * Subdrivers support.
1148 typedef struct ide_driver_s {
1149 struct module *owner;
1151 const char *version;
1154 unsigned supports_dsc_overlap : 1;
1155 int (*cleanup)(ide_drive_t *);
1156 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
1157 int (*end_request)(ide_drive_t *, int, int);
1158 u8 (*sense)(ide_drive_t *, const char *, u8);
1159 ide_startstop_t (*error)(ide_drive_t *, const char *, u8);
1160 ide_startstop_t (*abort)(ide_drive_t *, const char *);
1161 int (*ioctl)(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
1162 void (*pre_reset)(ide_drive_t *);
1163 sector_t (*capacity)(ide_drive_t *);
1164 ide_startstop_t (*special)(ide_drive_t *);
1165 ide_proc_entry_t *proc;
1166 int (*attach)(ide_drive_t *);
1167 void (*ata_prebuilder)(ide_drive_t *);
1168 void (*atapi_prebuilder)(ide_drive_t *);
1169 ide_startstop_t (*start_power_step)(ide_drive_t *, struct request *);
1170 void (*complete_power_step)(ide_drive_t *, struct request *, u8, u8);
1171 struct device_driver gen_driver;
1172 struct list_head drives;
1173 struct list_head drivers;
1176 #define DRIVER(drive) ((drive)->driver)
1178 extern int generic_ide_ioctl(struct file *, struct block_device *, unsigned, unsigned long);
1181 * ide_hwifs[] is the master data structure used to keep track
1182 * of just about everything in ide.c. Whenever possible, routines
1183 * should be using pointers to a drive (ide_drive_t *) or
1184 * pointers to a hwif (ide_hwif_t *), rather than indexing this
1185 * structure directly (the allocation/layout may change!).
1189 extern ide_hwif_t ide_hwifs[]; /* master data repository */
1191 extern int noautodma;
1193 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1194 extern int ide_end_dequeued_request (ide_drive_t *drive, struct request *rq, int uptodate, int nrsecs);
1197 * This is used on exit from the driver to designate the next irq handler
1198 * and also to start the safety timer.
1200 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1203 * This is used on exit from the driver to designate the next irq handler
1204 * and start the safety time safely and atomically from the IRQ handler
1205 * with respect to the command issue (which it also does)
1207 extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
1210 * Error reporting, in human readable form (luxurious, but a memory hog).
1212 * (drive, msg, status)
1214 byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat);
1217 * ide_error() takes action based on the error returned by the controller.
1218 * The caller should return immediately after invoking this.
1220 * (drive, msg, status)
1222 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1225 * Abort a running command on the controller triggering the abort
1226 * from a host side, non error situation
1229 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1232 * Issue a simple drive command
1233 * The drive must be selected beforehand.
1235 * (drive, command, nsector, handler)
1237 extern void ide_cmd(ide_drive_t *, u8, u8, ide_handler_t *);
1239 extern void ide_fix_driveid(struct hd_driveid *);
1241 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
1242 * removing leading/trailing blanks and compressing internal blanks.
1243 * It is primarily used to tidy up the model name/number fields as
1244 * returned by the WIN_[P]IDENTIFY commands.
1246 * (s, bytecount, byteswap)
1248 extern void ide_fixstring(u8 *, const int, const int);
1251 * This routine busy-waits for the drive status to be not "busy".
1252 * It then checks the status for all of the "good" bits and none
1253 * of the "bad" bits, and if all is okay it returns 0. All other
1254 * cases return 1 after doing "*startstop = ide_error()", and the
1255 * caller should return the updated value of "startstop" in this case.
1256 * "startstop" is unchanged when the function returns 0;
1257 * (startstop, drive, good, bad, timeout)
1259 extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1262 * Return the current idea about the total capacity of this drive.
1264 extern sector_t current_capacity (ide_drive_t *drive);
1267 * Start a reset operation for an IDE interface.
1268 * The caller should return immediately after invoking this.
1270 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1273 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1275 extern void ide_init_drive_cmd (struct request *rq);
1278 * this function returns error location sector offset in case of a write error
1280 extern u64 ide_get_error_location(ide_drive_t *, char *);
1283 * "action" parameter type for ide_do_drive_cmd() below.
1286 ide_wait, /* insert rq at end of list, and wait for it */
1287 ide_next, /* insert rq immediately after current request */
1288 ide_preempt, /* insert rq in front of current request */
1289 ide_head_wait, /* insert rq in front of current request and wait for it */
1290 ide_end /* insert rq at end of list, but don't wait for it */
1294 * This function issues a special IDE device request
1295 * onto the request queue.
1297 * If action is ide_wait, then the rq is queued at the end of the
1298 * request queue, and the function sleeps until it has been processed.
1299 * This is for use when invoked from an ioctl handler.
1301 * If action is ide_preempt, then the rq is queued at the head of
1302 * the request queue, displacing the currently-being-processed
1303 * request and this function returns immediately without waiting
1304 * for the new rq to be completed. This is VERY DANGEROUS, and is
1305 * intended for careful use by the ATAPI tape/cdrom driver code.
1307 * If action is ide_next, then the rq is queued immediately after
1308 * the currently-being-processed-request (if any), and the function
1309 * returns without waiting for the new rq to be completed. As above,
1310 * This is VERY DANGEROUS, and is intended for careful use by the
1311 * ATAPI tape/cdrom driver code.
1313 * If action is ide_end, then the rq is queued at the end of the
1314 * request queue, and the function returns immediately without waiting
1315 * for the new rq to be completed. This is again intended for careful
1316 * use by the ATAPI tape/cdrom driver code.
1318 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1321 * Clean up after success/failure of an explicit drive cmd.
1322 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
1323 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
1325 * (ide_drive_t *drive, u8 stat, u8 err)
1327 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1329 extern void try_to_flush_leftover_data(ide_drive_t *);
1332 * Issue ATA command and wait for completion.
1333 * Use for implementing commands in kernel
1335 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1337 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1339 typedef struct ide_task_s {
1341 * struct hd_drive_task_hdr tf;
1343 * struct hd_drive_hob_hdr hobf;
1344 * hob_struct_t hobf;
1346 task_ioreg_t tfRegister[8];
1347 task_ioreg_t hobRegister[8];
1348 ide_reg_valid_t tf_out_flags;
1349 ide_reg_valid_t tf_in_flags;
1352 ide_pre_handler_t *prehandler;
1353 ide_handler_t *handler;
1354 struct request *rq; /* copy of request */
1355 void *special; /* valid_t generally */
1358 typedef struct pkt_task_s {
1360 * struct hd_drive_task_hdr pktf;
1361 * task_struct_t pktf;
1364 task_ioreg_t tfRegister[8];
1367 ide_handler_t *handler;
1368 struct request *rq; /* copy of request */
1372 extern u32 ide_read_24(ide_drive_t *);
1374 extern void SELECT_DRIVE(ide_drive_t *);
1375 extern void SELECT_INTERRUPT(ide_drive_t *);
1376 extern void SELECT_MASK(ide_drive_t *, int);
1377 extern void QUIRK_LIST(ide_drive_t *);
1379 extern void ata_input_data(ide_drive_t *, void *, u32);
1380 extern void ata_output_data(ide_drive_t *, void *, u32);
1381 extern void atapi_input_bytes(ide_drive_t *, void *, u32);
1382 extern void atapi_output_bytes(ide_drive_t *, void *, u32);
1383 extern void taskfile_input_data(ide_drive_t *, void *, u32);
1384 extern void taskfile_output_data(ide_drive_t *, void *, u32);
1386 #define IDE_PIO_IN 0
1387 #define IDE_PIO_OUT 1
1389 static inline void __task_sectors(ide_drive_t *drive, char *buf,
1390 unsigned nsect, unsigned rw)
1393 * IRQ can happen instantly after reading/writing
1394 * last sector of the datablock.
1396 if (rw == IDE_PIO_OUT)
1397 taskfile_output_data(drive, buf, nsect * SECTOR_WORDS);
1399 taskfile_input_data(drive, buf, nsect * SECTOR_WORDS);
1402 #ifdef CONFIG_IDE_TASKFILE_IO
1403 static inline void task_bio_sectors(ide_drive_t *drive, struct request *rq,
1404 unsigned nsect, unsigned rw)
1406 unsigned long flags;
1407 char *buf = rq_map_buffer(rq, &flags);
1409 process_that_request_first(rq, nsect);
1410 __task_sectors(drive, buf, nsect, rw);
1411 rq_unmap_buffer(buf, &flags);
1413 #endif /* CONFIG_IDE_TASKFILE_IO */
1415 extern int drive_is_ready(ide_drive_t *);
1416 extern int wait_for_ready(ide_drive_t *, int /* timeout */);
1419 * taskfile io for disks for now...and builds request from ide_ioctl
1421 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1424 * Special Flagged Register Validation Caller
1426 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1428 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1429 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1430 extern ide_startstop_t recal_intr(ide_drive_t *);
1431 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1432 extern ide_startstop_t task_in_intr(ide_drive_t *);
1433 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1434 extern ide_startstop_t task_out_intr(ide_drive_t *);
1436 extern int ide_diag_taskfile(ide_drive_t *, ide_task_t *, unsigned long, u8 *);
1437 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1439 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1440 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1441 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1443 extern int system_bus_clock(void);
1445 extern u8 ide_auto_reduce_xfer(ide_drive_t *);
1446 extern int ide_driveid_update(ide_drive_t *);
1447 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1448 extern int ide_config_drive_speed(ide_drive_t *, u8);
1449 extern u8 eighty_ninty_three (ide_drive_t *);
1450 extern int set_transfer(ide_drive_t *, ide_task_t *);
1451 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1453 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1454 ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block);
1457 * ide_system_bus_speed() returns what we think is the system VESA/PCI
1458 * bus speed (in MHz). This is used for calculating interface PIO timings.
1459 * The default is 40 for known PCI systems, 50 otherwise.
1460 * The "idebus=xx" parameter can be used to override this value.
1462 extern int ide_system_bus_speed(void);
1465 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1466 * to the hwgroup by sleeping for timeout jiffies.
1468 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1470 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1471 extern void ide_timer_expiry(unsigned long);
1472 extern irqreturn_t ide_intr(int irq, void *dev_id, struct pt_regs *regs);
1473 extern void do_ide_request(request_queue_t *);
1474 extern void ide_init_subdrivers(void);
1476 extern struct block_device_operations ide_fops[];
1477 extern ide_proc_entry_t generic_subdriver_entries[];
1479 extern int ata_attach(ide_drive_t *);
1481 extern int ideprobe_init(void);
1483 extern void ide_scan_pcibus(int scan_direction) __init;
1484 extern int ide_pci_register_driver(struct pci_driver *driver);
1485 extern void ide_pci_unregister_driver(struct pci_driver *driver);
1486 extern void ide_pci_setup_ports(struct pci_dev *dev, struct ide_pci_device_s *d, int autodma, int pciirq, ata_index_t *index);
1487 extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
1488 extern void ide_pci_remove_hwifs(struct pci_dev *dev);
1490 extern void default_hwif_iops(ide_hwif_t *);
1491 extern void default_hwif_mmiops(ide_hwif_t *);
1492 extern void removed_hwif_iops(ide_hwif_t *);
1493 extern void default_hwif_transport(ide_hwif_t *);
1495 int ide_register_driver(ide_driver_t *driver);
1496 void ide_unregister_driver(ide_driver_t *driver);
1497 int ide_register_subdriver(ide_drive_t *, ide_driver_t *);
1498 int ide_unregister_subdriver (ide_drive_t *drive);
1499 int ide_replace_subdriver(ide_drive_t *drive, const char *driver);
1502 #define NEVER_BOARD 0
1504 #ifdef CONFIG_BLK_DEV_OFFBOARD
1505 # define OFF_BOARD ON_BOARD
1506 #else /* CONFIG_BLK_DEV_OFFBOARD */
1507 # define OFF_BOARD NEVER_BOARD
1508 #endif /* CONFIG_BLK_DEV_OFFBOARD */
1514 typedef struct ide_pci_enablebit_s {
1515 u8 reg; /* byte pci reg holding the enable-bit */
1516 u8 mask; /* mask to isolate the enable-bit */
1517 u8 val; /* value of masked reg when "enabled" */
1518 } ide_pci_enablebit_t;
1521 /* Uses ISA control ports not PCI ones. */
1522 IDEPCI_FLAG_ISA_PORTS = (1 << 0),
1524 IDEPCI_FLAG_FORCE_MASTER = (1 << 1),
1525 IDEPCI_FLAG_FORCE_PDC = (1 << 2),
1528 typedef struct ide_pci_device_s {
1530 void (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
1531 void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
1532 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1533 void (*init_iops)(ide_hwif_t *);
1534 void (*init_hwif)(ide_hwif_t *);
1535 void (*init_dma)(ide_hwif_t *, unsigned long);
1536 void (*fixup)(ide_hwif_t *);
1539 ide_pci_enablebit_t enablebits[2];
1542 struct ide_pci_device_s *next;
1546 extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
1547 extern void ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
1549 #define BAD_DMA_DRIVE 0
1550 #define GOOD_DMA_DRIVE 1
1552 #ifdef CONFIG_BLK_DEV_IDEDMA
1553 int __ide_dma_bad_drive(ide_drive_t *);
1554 int __ide_dma_good_drive(ide_drive_t *);
1555 int __ide_dma_off(ide_drive_t *);
1557 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1558 extern int ide_build_sglist(ide_drive_t *, struct request *);
1559 extern int ide_raw_build_sglist(ide_drive_t *, struct request *);
1560 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1561 extern void ide_destroy_dmatable(ide_drive_t *);
1562 extern ide_startstop_t ide_dma_intr(ide_drive_t *);
1563 extern int ide_release_dma(ide_hwif_t *);
1564 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1565 extern int ide_start_dma(ide_hwif_t *, ide_drive_t *, int);
1567 extern int __ide_dma_host_off(ide_drive_t *);
1568 extern int __ide_dma_off_quietly(ide_drive_t *);
1569 extern int __ide_dma_host_on(ide_drive_t *);
1570 extern int __ide_dma_on(ide_drive_t *);
1571 extern int __ide_dma_check(ide_drive_t *);
1572 extern int __ide_dma_read(ide_drive_t *);
1573 extern int __ide_dma_write(ide_drive_t *);
1574 extern int __ide_dma_begin(ide_drive_t *);
1575 extern int __ide_dma_end(ide_drive_t *);
1576 extern int __ide_dma_test_irq(ide_drive_t *);
1577 extern int __ide_dma_verbose(ide_drive_t *);
1578 extern int __ide_dma_lostirq(ide_drive_t *);
1579 extern int __ide_dma_timeout(ide_drive_t *);
1580 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1583 static inline int __ide_dma_off(ide_drive_t *drive) { return 0; }
1584 #endif /* CONFIG_BLK_DEV_IDEDMA */
1586 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1587 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1590 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1591 extern void ide_hwif_release_regions(ide_hwif_t *hwif);
1592 extern int ide_unregister_hwif(ide_hwif_t *hwif);
1593 extern int __ide_unregister_hwif(ide_hwif_t *hwif);
1595 extern void ide_undecoded_slave(ide_hwif_t *hwif);
1597 extern int probe_hwif_init(ide_hwif_t *hwif);
1598 extern int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif));
1600 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1602 return hwif->hwif_data;
1605 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1607 hwif->hwif_data = data;
1611 extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode);
1612 extern u8 ide_rate_filter(u8 mode, u8 speed);
1613 extern int ide_dma_enable(ide_drive_t *drive);
1614 extern char *ide_xfer_verbose(u8 xfer_rate);
1615 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1616 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1617 extern byte ide_dump_atapi_status(ide_drive_t *drive, const char *msg, byte stat);
1619 typedef struct ide_pio_timings_s {
1620 int setup_time; /* Address setup (ns) minimum */
1621 int active_time; /* Active pulse (ns) minimum */
1622 int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */
1623 } ide_pio_timings_t;
1625 typedef struct ide_pio_data_s {
1630 unsigned int cycle_time;
1633 extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
1634 extern const ide_pio_timings_t ide_pio_timings[6];
1637 extern spinlock_t ide_lock;
1638 extern struct semaphore ide_cfg_sem;
1640 * Structure locking:
1642 * ide_cfg_sem and ide_lock together protect changes to
1643 * ide_hwif_t->{next,hwgroup}
1646 * ide_hwgroup_t->busy: ide_lock
1647 * ide_hwgroup_t->hwif: ide_lock
1648 * ide_hwif_t->mate: constant, no locking
1649 * ide_drive_t->hwif: constant, no locking
1652 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable(); } while (0)
1654 extern struct bus_type ide_bus_type;
1656 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1657 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1659 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1660 #define ide_id_has_flush_cache_ext(id) \
1661 (((id)->cfs_enable_2 & 0x2400) == 0x2400)