4 * linux/include/linux/ide.h
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
9 #include <linux/init.h>
10 #include <linux/ioport.h>
11 #include <linux/hdreg.h>
12 #include <linux/hdsmart.h>
13 #include <linux/blkdev.h>
14 #include <linux/proc_fs.h>
15 #include <linux/interrupt.h>
16 #include <linux/bitops.h>
17 #include <linux/bio.h>
18 #include <linux/device.h>
19 #include <linux/pci.h>
20 #include <linux/completion.h>
21 #ifdef CONFIG_BLK_DEV_IDEACPI
22 #include <acpi/acpi.h>
24 #include <asm/byteorder.h>
25 #include <asm/system.h>
27 #include <asm/semaphore.h>
28 #include <asm/mutex.h>
30 #if defined(CRIS) || defined(FRV)
31 # define SUPPORT_VLB_SYNC 0
33 # define SUPPORT_VLB_SYNC 1
37 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
41 #define IDE_NO_IRQ (-1)
43 typedef unsigned char byte; /* used everywhere */
46 * Probably not wise to fiddle with these
48 #define ERROR_MAX 8 /* Max read/write errors per sector */
49 #define ERROR_RESET 3 /* Reset controller every 4th retry */
50 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
55 #define IDE_TUNE_NOAUTO 2
56 #define IDE_TUNE_AUTO 1
57 #define IDE_TUNE_DEFAULT 0
63 #define DMA_PIO_RETRY 1 /* retrying in PIO */
65 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
66 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
69 * Definitions for accessing IDE controller registers
71 #define IDE_NR_PORTS (10)
73 #define IDE_DATA_OFFSET (0)
74 #define IDE_ERROR_OFFSET (1)
75 #define IDE_NSECTOR_OFFSET (2)
76 #define IDE_SECTOR_OFFSET (3)
77 #define IDE_LCYL_OFFSET (4)
78 #define IDE_HCYL_OFFSET (5)
79 #define IDE_SELECT_OFFSET (6)
80 #define IDE_STATUS_OFFSET (7)
81 #define IDE_CONTROL_OFFSET (8)
82 #define IDE_IRQ_OFFSET (9)
84 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
85 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
87 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
88 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
89 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
90 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
91 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
92 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
93 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
94 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
95 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
96 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
98 #define IDE_FEATURE_REG IDE_ERROR_REG
99 #define IDE_COMMAND_REG IDE_STATUS_REG
100 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
101 #define IDE_IREASON_REG IDE_NSECTOR_REG
102 #define IDE_BCOUNTL_REG IDE_LCYL_REG
103 #define IDE_BCOUNTH_REG IDE_HCYL_REG
105 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
106 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
107 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
108 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
109 #define DRIVE_READY (READY_STAT | SEEK_STAT)
110 #define DATA_READY (DRQ_STAT)
112 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
114 #define SATA_NR_PORTS (3) /* 16 possible ?? */
116 #define SATA_STATUS_OFFSET (0)
117 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
118 #define SATA_ERROR_OFFSET (1)
119 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
120 #define SATA_CONTROL_OFFSET (2)
121 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
123 #define SATA_MISC_OFFSET (0)
124 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
125 #define SATA_PHY_OFFSET (1)
126 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
127 #define SATA_IEN_OFFSET (2)
128 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
131 * Our Physical Region Descriptor (PRD) table should be large enough
132 * to handle the biggest I/O request we are likely to see. Since requests
133 * can have no more than 256 sectors, and since the typical blocksize is
134 * two or more sectors, we could get by with a limit of 128 entries here for
135 * the usual worst case. Most requests seem to include some contiguous blocks,
136 * further reducing the number of table entries required.
138 * The driver reverts to PIO mode for individual requests that exceed
139 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
140 * 100% of all crazy scenarios here is not necessary.
142 * As it turns out though, we must allocate a full 4KB page for this,
143 * so the two PRD tables (ide0 & ide1) will each get half of that,
144 * allowing each to have about 256 entries (8 bytes each) from this.
147 #define PRD_ENTRIES 256
150 * Some more useful definitions
152 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
153 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
154 #define SECTOR_SIZE 512
155 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
156 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
159 * Timeouts for various operations:
161 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
162 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
163 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
164 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
165 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
166 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
169 * Check for an interrupt and acknowledge the interrupt status
172 typedef int (ide_ack_intr_t)(struct hwif_s *);
175 * hwif_chipset_t is used to keep track of the specific hardware
176 * chipset used by each IDE interface, if known.
178 enum { ide_unknown, ide_generic, ide_pci,
179 ide_cmd640, ide_dtc2278, ide_ali14xx,
180 ide_qd65xx, ide_umc8672, ide_ht6560b,
181 ide_rz1000, ide_trm290,
182 ide_cmd646, ide_cy82c693, ide_4drives,
183 ide_pmac, ide_etrax100, ide_acorn,
184 ide_au1xxx, ide_forced
187 typedef u8 hwif_chipset_t;
190 * Structure to hold all information about the location of this port
192 typedef struct hw_regs_s {
193 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
194 int irq; /* our irq number */
195 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
196 hwif_chipset_t chipset;
200 struct hwif_s * ide_find_port(unsigned long);
202 int ide_register_hw(hw_regs_t *, void (*)(struct hwif_s *), int,
205 void ide_setup_ports( hw_regs_t *hw,
210 ide_ack_intr_t *ack_intr,
216 static inline void ide_std_init_ports(hw_regs_t *hw,
217 unsigned long io_addr,
218 unsigned long ctl_addr)
222 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
223 hw->io_ports[i] = io_addr++;
225 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
230 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
232 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
235 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
236 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
237 # define ide_default_io_base(index) (0)
238 # define ide_default_irq(base) (0)
239 # define ide_init_default_irq(base) (0)
242 #ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
243 static inline void ide_init_hwif_ports(hw_regs_t *hw,
244 unsigned long io_addr,
245 unsigned long ctl_addr,
249 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
251 ide_std_init_ports(hw, io_addr, ctl_addr);
256 hw->io_ports[IDE_IRQ_OFFSET] = 0;
259 if (ppc_ide_md.ide_init_hwif)
260 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
264 static inline void ide_init_hwif_ports(hw_regs_t *hw,
265 unsigned long io_addr,
266 unsigned long ctl_addr,
269 if (io_addr || ctl_addr)
270 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
272 #endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
274 /* Currently only m68k, apus and m8xx need it */
275 #ifndef IDE_ARCH_ACK_INTR
276 # define ide_ack_intr(hwif) (1)
279 /* Currently only Atari needs it */
280 #ifndef IDE_ARCH_LOCK
281 # define ide_release_lock() do {} while (0)
282 # define ide_get_lock(hdlr, data) do {} while (0)
283 #endif /* IDE_ARCH_LOCK */
286 * Now for the data we need to maintain per-drive: ide_drive_t
289 #define ide_scsi 0x21
290 #define ide_disk 0x20
291 #define ide_optical 0x7
292 #define ide_cdrom 0x5
294 #define ide_floppy 0x0
297 * Special Driver Flags
299 * set_geometry : respecify drive geometry
300 * recalibrate : seek to cyl 0
301 * set_multmode : set multmode count
302 * set_tune : tune interface for drive
303 * serviced : service command
309 unsigned set_geometry : 1;
310 unsigned recalibrate : 1;
311 unsigned set_multmode : 1;
312 unsigned set_tune : 1;
313 unsigned serviced : 1;
314 unsigned reserved : 3;
319 * ATA DATA Register Special.
320 * ATA NSECTOR Count Register().
321 * ATAPI Byte Count Register.
326 #if defined(__LITTLE_ENDIAN_BITFIELD)
327 unsigned low :8; /* LSB */
328 unsigned high :8; /* MSB */
329 #elif defined(__BIG_ENDIAN_BITFIELD)
330 unsigned high :8; /* MSB */
331 unsigned low :8; /* LSB */
333 #error "Please fix <asm/byteorder.h>"
336 } ata_nsector_t, ata_data_t, atapi_bcount_t;
339 * ATA-IDE Select Register, aka Device-Head
341 * head : always zeros here
342 * unit : drive select number: 0/1
344 * lba : using LBA instead of CHS
350 #if defined(__LITTLE_ENDIAN_BITFIELD)
356 #elif defined(__BIG_ENDIAN_BITFIELD)
363 #error "Please fix <asm/byteorder.h>"
366 } select_t, ata_select_t;
369 * ATAPI Feature Register
371 * dma : Using DMA or PIO
372 * reserved321 : Reserved
373 * reserved654 : Reserved (Tag Type)
374 * reserved7 : Reserved
379 #if defined(__LITTLE_ENDIAN_BITFIELD)
381 unsigned reserved321 :3;
382 unsigned reserved654 :3;
383 unsigned reserved7 :1;
384 #elif defined(__BIG_ENDIAN_BITFIELD)
385 unsigned reserved7 :1;
386 unsigned reserved654 :3;
387 unsigned reserved321 :3;
390 #error "Please fix <asm/byteorder.h>"
396 * ATAPI Interrupt Reason Register.
398 * cod : Information transferred is command (1) or data (0)
399 * io : The device requests us to read (1) or write (0)
400 * reserved : Reserved
405 #if defined(__LITTLE_ENDIAN_BITFIELD)
408 unsigned reserved :6;
409 #elif defined(__BIG_ENDIAN_BITFIELD)
410 unsigned reserved :6;
414 #error "Please fix <asm/byteorder.h>"
420 * The ATAPI error register.
422 * ili : Illegal Length Indication
423 * eom : End Of Media Detected
424 * abrt : Aborted command - As defined by ATA
425 * mcr : Media Change Requested - As defined by ATA
426 * sense_key : Sense key of the last failed packet command
431 #if defined(__LITTLE_ENDIAN_BITFIELD)
436 unsigned sense_key :4;
437 #elif defined(__BIG_ENDIAN_BITFIELD)
438 unsigned sense_key :4;
444 #error "Please fix <asm/byteorder.h>"
450 * Status returned from various ide_ functions
453 ide_stopped, /* no drive operation was started */
454 ide_started, /* a drive operation was started, handler was set */
458 struct ide_settings_s;
460 #ifdef CONFIG_BLK_DEV_IDEACPI
461 struct ide_acpi_drive_link;
462 struct ide_acpi_hwif_link;
465 typedef struct ide_drive_s {
466 char name[4]; /* drive name, such as "hda" */
467 char driver_req[10]; /* requests specific driver */
469 struct request_queue *queue; /* request queue */
471 struct request *rq; /* current request */
472 struct ide_drive_s *next; /* circular list of hwgroup drives */
473 void *driver_data; /* extra driver data */
474 struct hd_driveid *id; /* drive model identification info */
475 #ifdef CONFIG_IDE_PROC_FS
476 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
477 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
479 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
481 unsigned long sleep; /* sleep until this time */
482 unsigned long service_start; /* time we started last request */
483 unsigned long service_time; /* service time of last request */
484 unsigned long timeout; /* max time to wait for irq */
486 special_t special; /* special action flags */
487 select_t select; /* basic drive/head select reg value */
489 u8 keep_settings; /* restore settings after drive reset */
490 u8 using_dma; /* disk is using dma for read/write */
491 u8 retry_pio; /* retrying dma capable host in pio */
492 u8 state; /* retry state */
493 u8 waiting_for_dma; /* dma currently in progress */
494 u8 unmask; /* okay to unmask other irqs */
495 u8 bswap; /* byte swap data */
496 u8 noflush; /* don't attempt flushes */
497 u8 dsc_overlap; /* DSC overlap */
498 u8 nice1; /* give potential excess bandwidth */
500 unsigned present : 1; /* drive is physically present */
501 unsigned dead : 1; /* device ejected hint */
502 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
503 unsigned noprobe : 1; /* from: hdx=noprobe */
504 unsigned removable : 1; /* 1 if need to do check_media_change */
505 unsigned attach : 1; /* needed for removable devices */
506 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
507 unsigned no_unmask : 1; /* disallow setting unmask bit */
508 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
509 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
510 unsigned nice0 : 1; /* give obvious excess bandwidth */
511 unsigned nice2 : 1; /* give a share in our own bandwidth */
512 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
513 unsigned nodma : 1; /* disallow DMA */
514 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
515 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
516 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
517 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
518 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
519 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
520 unsigned post_reset : 1;
521 unsigned udma33_warned : 1;
523 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
524 u8 quirk_list; /* considered quirky, set for a specific host */
525 u8 init_speed; /* transfer rate set at boot */
526 u8 current_speed; /* current transfer rate set */
527 u8 desired_speed; /* desired transfer rate set */
528 u8 dn; /* now wide spread use */
529 u8 wcache; /* status of write cache */
530 u8 acoustic; /* acoustic management */
531 u8 media; /* disk, cdrom, tape, floppy, ... */
532 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
533 u8 ready_stat; /* min status value for drive ready */
534 u8 mult_count; /* current multiple sector setting */
535 u8 mult_req; /* requested multiple sector setting */
536 u8 tune_req; /* requested drive tuning setting */
537 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
538 u8 bad_wstat; /* used for ignoring WRERR_STAT */
539 u8 nowerr; /* used for ignoring WRERR_STAT */
540 u8 sect0; /* offset of first sector for DM6:DDO */
541 u8 head; /* "real" number of heads */
542 u8 sect; /* "real" sectors per track */
543 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
544 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
546 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
547 unsigned int cyl; /* "real" number of cyls */
548 unsigned int drive_data; /* used by set_pio_mode/selectproc */
549 unsigned int failures; /* current failure count */
550 unsigned int max_failures; /* maximum allowed failure count */
551 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
553 u64 capacity64; /* total number of sectors */
555 int lun; /* logical unit */
556 int crc_count; /* crc counter to reduce drive speed */
557 #ifdef CONFIG_BLK_DEV_IDEACPI
558 struct ide_acpi_drive_link *acpidata;
560 struct list_head list;
561 struct device gendev;
562 struct completion gendev_rel_comp; /* to deal with device release() */
565 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
567 #define IDE_CHIPSET_PCI_MASK \
568 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
569 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
571 struct ide_port_info;
573 typedef struct hwif_s {
574 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
575 struct hwif_s *mate; /* other hwif from same PCI chip */
576 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
577 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
579 char name[6]; /* name of interface, eg. "ide0" */
581 /* task file registers for pata and sata */
582 unsigned long io_ports[IDE_NR_PORTS];
583 unsigned long sata_scr[SATA_NR_PORTS];
584 unsigned long sata_misc[SATA_NR_PORTS];
586 ide_drive_t drives[MAX_DRIVES]; /* drive info */
588 u8 major; /* our major number */
589 u8 index; /* 0 for ide0; 1 for ide1; ... */
590 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
591 u8 straight8; /* Alan's straight 8 check */
592 u8 bus_state; /* power state of the IDE bus */
602 u8 cbl; /* cable type */
604 hwif_chipset_t chipset; /* sub-module for tuning.. */
606 struct pci_dev *pci_dev; /* for pci chipsets */
607 const struct ide_port_info *cds; /* chipset device struct */
609 ide_ack_intr_t *ack_intr;
611 void (*rw_disk)(ide_drive_t *, struct request *);
614 ide_hwif_ops_t *hwifops;
616 /* routine to program host for PIO mode */
617 void (*set_pio_mode)(ide_drive_t *, const u8);
618 /* routine to program host for DMA mode */
619 void (*set_dma_mode)(ide_drive_t *, const u8);
620 /* tweaks hardware to select drive */
621 void (*selectproc)(ide_drive_t *);
622 /* chipset polling based on hba specifics */
623 int (*reset_poll)(ide_drive_t *);
624 /* chipset specific changes to default for device-hba resets */
625 void (*pre_reset)(ide_drive_t *);
626 /* routine to reset controller after a disk reset */
627 void (*resetproc)(ide_drive_t *);
628 /* special interrupt handling for shared pci interrupts */
629 void (*intrproc)(ide_drive_t *);
630 /* special host masking for drive selection */
631 void (*maskproc)(ide_drive_t *, int);
632 /* check host's drive quirk list */
633 int (*quirkproc)(ide_drive_t *);
634 /* driver soft-power interface */
635 int (*busproc)(ide_drive_t *, int);
637 u8 (*mdma_filter)(ide_drive_t *);
638 u8 (*udma_filter)(ide_drive_t *);
640 void (*fixup)(struct hwif_s *);
642 void (*ata_input_data)(ide_drive_t *, void *, u32);
643 void (*ata_output_data)(ide_drive_t *, void *, u32);
645 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
646 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
648 int (*dma_setup)(ide_drive_t *);
649 void (*dma_exec_cmd)(ide_drive_t *, u8);
650 void (*dma_start)(ide_drive_t *);
651 int (*ide_dma_end)(ide_drive_t *drive);
652 int (*ide_dma_on)(ide_drive_t *drive);
653 void (*dma_off_quietly)(ide_drive_t *drive);
654 int (*ide_dma_test_irq)(ide_drive_t *drive);
655 void (*ide_dma_clear_irq)(ide_drive_t *drive);
656 void (*dma_host_on)(ide_drive_t *drive);
657 void (*dma_host_off)(ide_drive_t *drive);
658 void (*dma_lost_irq)(ide_drive_t *drive);
659 void (*dma_timeout)(ide_drive_t *drive);
661 void (*OUTB)(u8 addr, unsigned long port);
662 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
663 void (*OUTW)(u16 addr, unsigned long port);
664 void (*OUTSW)(unsigned long port, void *addr, u32 count);
665 void (*OUTSL)(unsigned long port, void *addr, u32 count);
667 u8 (*INB)(unsigned long port);
668 u16 (*INW)(unsigned long port);
669 void (*INSW)(unsigned long port, void *addr, u32 count);
670 void (*INSL)(unsigned long port, void *addr, u32 count);
672 /* dma physical region descriptor table (cpu view) */
673 unsigned int *dmatable_cpu;
674 /* dma physical region descriptor table (dma view) */
675 dma_addr_t dmatable_dma;
676 /* Scatter-gather list used to build the above */
677 struct scatterlist *sg_table;
678 int sg_max_nents; /* Maximum number of entries in it */
679 int sg_nents; /* Current number of entries in it */
680 int sg_dma_direction; /* dma transfer direction */
682 /* data phase of the active command (currently only valid for PIO/DMA) */
687 struct scatterlist *cursg;
688 unsigned int cursg_ofs;
690 int rqsize; /* max sectors per request */
691 int irq; /* our irq number */
693 unsigned long dma_base; /* base addr for dma ports */
694 unsigned long dma_command; /* dma command register */
695 unsigned long dma_vendor1; /* dma vendor 1 register */
696 unsigned long dma_status; /* dma status register */
697 unsigned long dma_vendor3; /* dma vendor 3 register */
698 unsigned long dma_prdtable; /* actual prd table address */
700 unsigned long config_data; /* for use by chipset-specific code */
701 unsigned long select_data; /* for use by chipset-specific code */
703 unsigned long extra_base; /* extra addr for dma ports */
704 unsigned extra_ports; /* number of extra dma ports */
706 unsigned noprobe : 1; /* don't probe for this interface */
707 unsigned present : 1; /* this interface exists */
708 unsigned hold : 1; /* this interface is always present */
709 unsigned serialized : 1; /* serialized all channel operation */
710 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
711 unsigned reset : 1; /* reset after probe */
712 unsigned auto_poll : 1; /* supports nop auto-poll */
713 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
714 unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
715 unsigned mmio : 1; /* host uses MMIO */
717 struct device gendev;
718 struct completion gendev_rel_comp; /* To deal with device release() */
720 void *hwif_data; /* extra hwif data */
724 #ifdef CONFIG_BLK_DEV_IDEACPI
725 struct ide_acpi_hwif_link *acpidata;
727 } ____cacheline_internodealigned_in_smp ide_hwif_t;
730 * internal ide interrupt handler type
732 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
733 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
734 typedef int (ide_expiry_t)(ide_drive_t *);
736 typedef struct hwgroup_s {
737 /* irq handler, if active */
738 ide_startstop_t (*handler)(ide_drive_t *);
739 /* irq handler, suspended if active */
740 ide_startstop_t (*handler_save)(ide_drive_t *);
741 /* BOOL: protects all fields below */
743 /* BOOL: wake us up on timer expiry */
744 unsigned int sleeping : 1;
745 /* BOOL: polling active & poll_timeout field valid */
746 unsigned int polling : 1;
747 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
748 unsigned int resetting : 1;
752 /* ptr to current hwif in linked-list */
755 /* for pci chipsets */
756 struct pci_dev *pci_dev;
758 /* current request */
761 struct timer_list timer;
762 /* local copy of current write rq */
764 /* timeout value during long polls */
765 unsigned long poll_timeout;
766 /* queried upon timeouts */
767 int (*expiry)(ide_drive_t *);
768 /* ide_system_bus_speed */
773 unsigned char cmd_buf[4];
776 typedef struct ide_driver_s ide_driver_t;
778 extern struct mutex ide_setting_mtx;
780 int set_io_32bit(ide_drive_t *, int);
781 int set_pio_mode(ide_drive_t *, int);
782 int set_using_dma(ide_drive_t *, int);
784 #ifdef CONFIG_IDE_PROC_FS
786 * configurable drive settings
793 #define SETTING_READ (1 << 0)
794 #define SETTING_WRITE (1 << 1)
795 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
797 typedef int (ide_procset_t)(ide_drive_t *, int);
798 typedef struct ide_settings_s {
809 struct ide_settings_s *next;
812 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
815 * /proc/ide interface
820 read_proc_t *read_proc;
821 write_proc_t *write_proc;
824 void proc_ide_create(void);
825 void proc_ide_destroy(void);
826 void ide_proc_register_port(ide_hwif_t *);
827 void ide_proc_unregister_port(ide_hwif_t *);
828 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
829 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
831 void ide_add_generic_settings(ide_drive_t *);
833 read_proc_t proc_ide_read_capacity;
834 read_proc_t proc_ide_read_geometry;
836 #ifdef CONFIG_BLK_DEV_IDEPCI
837 void ide_pci_create_host_proc(const char *, get_info_t *);
841 * Standard exit stuff:
843 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
852 *start = page + off; \
856 static inline void proc_ide_create(void) { ; }
857 static inline void proc_ide_destroy(void) { ; }
858 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
859 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
860 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
861 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
862 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
863 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
867 * Power Management step value (rq->pm->pm_step).
869 * The step value starts at 0 (ide_pm_state_start_suspend) for a
870 * suspend operation or 1000 (ide_pm_state_start_resume) for a
873 * For each step, the core calls the subdriver start_power_step() first.
875 * - ide_stopped : In this case, the core calls us back again unless
876 * step have been set to ide_power_state_completed.
877 * - ide_started : In this case, the channel is left busy until an
878 * async event (interrupt) occurs.
879 * Typically, start_power_step() will issue a taskfile request with
882 * Upon reception of the interrupt, the core will call complete_power_step()
883 * with the error code if any. This routine should update the step value
884 * and return. It should not start a new request. The core will call
885 * start_power_step for the new step value, unless step have been set to
886 * ide_power_state_completed.
888 * Subdrivers are expected to define their own additional power
889 * steps from 1..999 for suspend and from 1001..1999 for resume,
890 * other values are reserved for future use.
894 ide_pm_state_completed = -1,
895 ide_pm_state_start_suspend = 0,
896 ide_pm_state_start_resume = 1000,
900 * Subdrivers support.
902 * The gendriver.owner field should be set to the module owner of this driver.
903 * The gendriver.name field should be set to the name of this driver
905 struct ide_driver_s {
908 unsigned supports_dsc_overlap : 1;
909 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
910 int (*end_request)(ide_drive_t *, int, int);
911 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
912 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
913 struct device_driver gen_driver;
914 int (*probe)(ide_drive_t *);
915 void (*remove)(ide_drive_t *);
916 void (*resume)(ide_drive_t *);
917 void (*shutdown)(ide_drive_t *);
918 #ifdef CONFIG_IDE_PROC_FS
919 ide_proc_entry_t *proc;
923 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
925 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
928 * ide_hwifs[] is the master data structure used to keep track
929 * of just about everything in ide.c. Whenever possible, routines
930 * should be using pointers to a drive (ide_drive_t *) or
931 * pointers to a hwif (ide_hwif_t *), rather than indexing this
932 * structure directly (the allocation/layout may change!).
936 extern ide_hwif_t ide_hwifs[]; /* master data repository */
938 extern int noautodma;
940 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
941 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
942 int uptodate, int nr_sectors);
944 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
946 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
949 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
951 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
953 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
955 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
957 extern void ide_fix_driveid(struct hd_driveid *);
959 extern void ide_fixstring(u8 *, const int, const int);
961 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
963 extern ide_startstop_t ide_do_reset (ide_drive_t *);
965 extern void ide_init_drive_cmd (struct request *rq);
968 * "action" parameter type for ide_do_drive_cmd() below.
971 ide_wait, /* insert rq at end of list, and wait for it */
972 ide_preempt, /* insert rq in front of current request */
973 ide_head_wait, /* insert rq in front of current request and wait for it */
974 ide_end /* insert rq at end of list, but don't wait for it */
977 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
979 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
982 * Issue ATA command and wait for completion.
983 * Use for implementing commands in kernel
985 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
987 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
990 IDE_TFLAG_LBA48 = (1 << 0),
991 IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
992 IDE_TFLAG_FLAGGED = (1 << 2),
993 IDE_TFLAG_OUT_DATA = (1 << 3),
994 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
995 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
996 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
997 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
998 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
999 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
1000 IDE_TFLAG_OUT_HOB_NSECT |
1001 IDE_TFLAG_OUT_HOB_LBAL |
1002 IDE_TFLAG_OUT_HOB_LBAM |
1003 IDE_TFLAG_OUT_HOB_LBAH,
1004 IDE_TFLAG_OUT_FEATURE = (1 << 9),
1005 IDE_TFLAG_OUT_NSECT = (1 << 10),
1006 IDE_TFLAG_OUT_LBAL = (1 << 11),
1007 IDE_TFLAG_OUT_LBAM = (1 << 12),
1008 IDE_TFLAG_OUT_LBAH = (1 << 13),
1009 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
1010 IDE_TFLAG_OUT_NSECT |
1011 IDE_TFLAG_OUT_LBAL |
1012 IDE_TFLAG_OUT_LBAM |
1014 IDE_TFLAG_OUT_DEVICE = (1 << 14),
1017 struct ide_taskfile {
1018 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
1020 u8 hob_feature; /* 1-5: additional data to support LBA48 */
1026 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
1029 u8 error; /* read: error */
1030 u8 feature; /* write: feature */
1033 u8 nsect; /* 8: number of sectors */
1034 u8 lbal; /* 9: LBA low */
1035 u8 lbam; /* 10: LBA mid */
1036 u8 lbah; /* 11: LBA high */
1038 u8 device; /* 12: device select */
1041 u8 status; /*  read: status  */
1042 u8 command; /* write: command */
1046 typedef struct ide_task_s {
1048 struct ide_taskfile tf;
1052 ide_reg_valid_t tf_in_flags;
1055 ide_pre_handler_t *prehandler;
1056 ide_handler_t *handler;
1057 struct request *rq; /* copy of request */
1058 void *special; /* valid_t generally */
1061 void ide_tf_load(ide_drive_t *, ide_task_t *);
1063 extern u32 ide_read_24(ide_drive_t *);
1065 extern void SELECT_DRIVE(ide_drive_t *);
1066 extern void SELECT_INTERRUPT(ide_drive_t *);
1067 extern void SELECT_MASK(ide_drive_t *, int);
1068 extern void QUIRK_LIST(ide_drive_t *);
1070 extern int drive_is_ready(ide_drive_t *);
1073 * taskfile io for disks for now...and builds request from ide_ioctl
1075 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1078 * Special Flagged Register Validation Caller
1080 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1082 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1083 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1084 extern ide_startstop_t recal_intr(ide_drive_t *);
1085 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1086 extern ide_startstop_t task_in_intr(ide_drive_t *);
1087 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1089 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1091 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1093 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1094 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1095 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1097 extern int system_bus_clock(void);
1099 extern int ide_driveid_update(ide_drive_t *);
1100 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1101 extern int ide_config_drive_speed(ide_drive_t *, u8);
1102 extern u8 eighty_ninty_three (ide_drive_t *);
1103 extern int set_transfer(ide_drive_t *, ide_task_t *);
1104 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1106 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1108 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1110 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1111 extern void ide_timer_expiry(unsigned long);
1112 extern irqreturn_t ide_intr(int irq, void *dev_id);
1113 extern void do_ide_request(struct request_queue *);
1115 void ide_init_disk(struct gendisk *, ide_drive_t *);
1117 extern int ideprobe_init(void);
1119 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1120 extern void ide_scan_pcibus(int scan_direction) __init;
1121 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1122 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1124 #define ide_pci_register_driver(d) pci_register_driver(d)
1127 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1128 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1130 extern void default_hwif_iops(ide_hwif_t *);
1131 extern void default_hwif_mmiops(ide_hwif_t *);
1132 extern void default_hwif_transport(ide_hwif_t *);
1134 typedef struct ide_pci_enablebit_s {
1135 u8 reg; /* byte pci reg holding the enable-bit */
1136 u8 mask; /* mask to isolate the enable-bit */
1137 u8 val; /* value of masked reg when "enabled" */
1138 } ide_pci_enablebit_t;
1141 /* Uses ISA control ports not PCI ones. */
1142 IDE_HFLAG_ISA_PORTS = (1 << 0),
1143 /* single port device */
1144 IDE_HFLAG_SINGLE = (1 << 1),
1145 /* don't use legacy PIO blacklist */
1146 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1147 /* don't use conservative PIO "downgrade" */
1148 IDE_HFLAG_PIO_NO_DOWNGRADE = (1 << 3),
1149 /* use PIO8/9 for prefetch off/on */
1150 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1151 /* use PIO6/7 for fast-devsel off/on */
1152 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1153 /* use 100-102 and 200-202 PIO values to set DMA modes */
1154 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1156 * keep DMA setting when programming PIO mode, may be used only
1157 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1159 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1160 /* program host for the transfer mode after programming device */
1161 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1162 /* don't program host/device for the transfer mode ("smart" hosts) */
1163 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1164 /* trust BIOS for programming chipset/device for DMA */
1165 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1166 /* host uses VDMA */
1167 IDE_HFLAG_VDMA = (1 << 11),
1168 /* ATAPI DMA is unsupported */
1169 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1170 /* set if host is a "bootable" controller */
1171 IDE_HFLAG_BOOTABLE = (1 << 13),
1172 /* host doesn't support DMA */
1173 IDE_HFLAG_NO_DMA = (1 << 14),
1174 /* check if host is PCI IDE device before allowing DMA */
1175 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1176 /* host is CS5510/CS5520 */
1177 IDE_HFLAG_CS5520 = (1 << 16),
1179 IDE_HFLAG_NO_LBA48 = (1 << 17),
1181 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1182 /* data FIFO is cleared by an error */
1183 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1184 /* serialize ports */
1185 IDE_HFLAG_SERIALIZE = (1 << 20),
1186 /* use legacy IRQs */
1187 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1188 /* force use of legacy IRQs */
1189 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1190 /* limit LBA48 requests to 256 sectors */
1191 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1192 /* use 32-bit I/O ops */
1193 IDE_HFLAG_IO_32BIT = (1 << 24),
1195 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1198 #ifdef CONFIG_BLK_DEV_OFFBOARD
1199 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_BOOTABLE
1201 # define IDE_HFLAG_OFF_BOARD 0
1204 struct ide_port_info {
1206 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1207 void (*init_iops)(ide_hwif_t *);
1208 void (*init_hwif)(ide_hwif_t *);
1209 void (*init_dma)(ide_hwif_t *, unsigned long);
1210 void (*fixup)(ide_hwif_t *);
1211 ide_pci_enablebit_t enablebits[2];
1212 hwif_chipset_t chipset;
1221 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1222 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1224 void ide_map_sg(ide_drive_t *, struct request *);
1225 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1227 #define BAD_DMA_DRIVE 0
1228 #define GOOD_DMA_DRIVE 1
1230 struct drive_list_entry {
1231 const char *id_model;
1232 const char *id_firmware;
1235 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1237 #ifdef CONFIG_BLK_DEV_IDEDMA
1238 int __ide_dma_bad_drive(ide_drive_t *);
1239 int ide_id_dma_bug(ide_drive_t *);
1241 u8 ide_find_dma_mode(ide_drive_t *, u8);
1243 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1245 return ide_find_dma_mode(drive, XFER_UDMA_6);
1248 void ide_dma_off(ide_drive_t *);
1249 int ide_set_dma(ide_drive_t *);
1250 ide_startstop_t ide_dma_intr(ide_drive_t *);
1252 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1253 extern int ide_build_sglist(ide_drive_t *, struct request *);
1254 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1255 extern void ide_destroy_dmatable(ide_drive_t *);
1256 extern int ide_release_dma(ide_hwif_t *);
1257 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1259 void ide_dma_host_off(ide_drive_t *);
1260 void ide_dma_off_quietly(ide_drive_t *);
1261 void ide_dma_host_on(ide_drive_t *);
1262 extern int __ide_dma_on(ide_drive_t *);
1263 extern int ide_dma_setup(ide_drive_t *);
1264 extern void ide_dma_start(ide_drive_t *);
1265 extern int __ide_dma_end(ide_drive_t *);
1266 extern void ide_dma_lost_irq(ide_drive_t *);
1267 extern void ide_dma_timeout(ide_drive_t *);
1268 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1271 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1272 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1273 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1274 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1275 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1276 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1277 #endif /* CONFIG_BLK_DEV_IDEDMA */
1279 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1280 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1283 #ifdef CONFIG_BLK_DEV_IDEACPI
1284 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1285 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1286 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1287 extern void ide_acpi_init(ide_hwif_t *hwif);
1288 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1290 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1291 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1292 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1293 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1294 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1297 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1298 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1299 extern void ide_unregister (unsigned int index);
1301 void ide_register_region(struct gendisk *);
1302 void ide_unregister_region(struct gendisk *);
1304 void ide_undecoded_slave(ide_hwif_t *);
1306 int ide_device_add(u8 idx[4]);
1308 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1310 return hwif->hwif_data;
1313 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1315 hwif->hwif_data = data;
1318 const char *ide_xfer_verbose(u8 mode);
1319 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1320 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1322 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1324 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1327 static inline int ide_dev_is_sata(struct hd_driveid *id)
1330 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1331 * verifying that word 80 by casting it to a signed type --
1332 * this trick allows us to filter out the reserved values of
1333 * 0x0000 and 0xffff along with the earlier ATA revisions...
1335 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1340 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1342 typedef struct ide_pio_timings_s {
1343 int setup_time; /* Address setup (ns) minimum */
1344 int active_time; /* Active pulse (ns) minimum */
1345 int cycle_time; /* Cycle time (ns) minimum = */
1346 /* active + recovery (+ setup for some chips) */
1347 } ide_pio_timings_t;
1349 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1350 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1351 extern const ide_pio_timings_t ide_pio_timings[6];
1353 int ide_set_pio_mode(ide_drive_t *, u8);
1354 int ide_set_dma_mode(ide_drive_t *, u8);
1356 void ide_set_pio(ide_drive_t *, u8);
1358 static inline void ide_set_max_pio(ide_drive_t *drive)
1360 ide_set_pio(drive, 255);
1363 extern spinlock_t ide_lock;
1364 extern struct mutex ide_cfg_mtx;
1366 * Structure locking:
1368 * ide_cfg_mtx and ide_lock together protect changes to
1369 * ide_hwif_t->{next,hwgroup}
1372 * ide_hwgroup_t->busy: ide_lock
1373 * ide_hwgroup_t->hwif: ide_lock
1374 * ide_hwif_t->mate: constant, no locking
1375 * ide_drive_t->hwif: constant, no locking
1378 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1380 extern struct bus_type ide_bus_type;
1382 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1383 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1385 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1386 #define ide_id_has_flush_cache_ext(id) \
1387 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1389 static inline int hwif_to_node(ide_hwif_t *hwif)
1391 struct pci_dev *dev = hwif->pci_dev;
1392 return dev ? pcibus_to_node(dev->bus) : -1;
1395 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1397 ide_hwif_t *hwif = HWIF(drive);
1399 return &hwif->drives[(drive->dn ^ 1) & 1];