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>
29 /******************************************************************************
30 * IDE driver configuration options (play with these as desired):
32 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
34 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
36 #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
37 #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
39 #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
40 #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
42 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
43 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
46 #ifndef DISABLE_IRQ_NOSYNC
47 #define DISABLE_IRQ_NOSYNC 0
51 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
55 #define IDE_NO_IRQ (-1)
58 * "No user-serviceable parts" beyond this point :)
59 *****************************************************************************/
61 typedef unsigned char byte; /* used everywhere */
64 * Probably not wise to fiddle with these
66 #define ERROR_MAX 8 /* Max read/write errors per sector */
67 #define ERROR_RESET 3 /* Reset controller every 4th retry */
68 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
73 #define IDE_TUNE_NOAUTO 2
74 #define IDE_TUNE_AUTO 1
75 #define IDE_TUNE_DEFAULT 0
81 #define DMA_PIO_RETRY 1 /* retrying in PIO */
83 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
84 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
87 * Definitions for accessing IDE controller registers
89 #define IDE_NR_PORTS (10)
91 #define IDE_DATA_OFFSET (0)
92 #define IDE_ERROR_OFFSET (1)
93 #define IDE_NSECTOR_OFFSET (2)
94 #define IDE_SECTOR_OFFSET (3)
95 #define IDE_LCYL_OFFSET (4)
96 #define IDE_HCYL_OFFSET (5)
97 #define IDE_SELECT_OFFSET (6)
98 #define IDE_STATUS_OFFSET (7)
99 #define IDE_CONTROL_OFFSET (8)
100 #define IDE_IRQ_OFFSET (9)
102 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
103 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
105 #define IDE_CONTROL_OFFSET_HOB (7)
107 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
108 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
109 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
110 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
111 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
112 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
113 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
114 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
115 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
116 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
118 #define IDE_FEATURE_REG IDE_ERROR_REG
119 #define IDE_COMMAND_REG IDE_STATUS_REG
120 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
121 #define IDE_IREASON_REG IDE_NSECTOR_REG
122 #define IDE_BCOUNTL_REG IDE_LCYL_REG
123 #define IDE_BCOUNTH_REG IDE_HCYL_REG
125 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
126 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
127 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
128 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
129 #define DRIVE_READY (READY_STAT | SEEK_STAT)
130 #define DATA_READY (DRQ_STAT)
132 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
134 #define SATA_NR_PORTS (3) /* 16 possible ?? */
136 #define SATA_STATUS_OFFSET (0)
137 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
138 #define SATA_ERROR_OFFSET (1)
139 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
140 #define SATA_CONTROL_OFFSET (2)
141 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
143 #define SATA_MISC_OFFSET (0)
144 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
145 #define SATA_PHY_OFFSET (1)
146 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
147 #define SATA_IEN_OFFSET (2)
148 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
151 * Our Physical Region Descriptor (PRD) table should be large enough
152 * to handle the biggest I/O request we are likely to see. Since requests
153 * can have no more than 256 sectors, and since the typical blocksize is
154 * two or more sectors, we could get by with a limit of 128 entries here for
155 * the usual worst case. Most requests seem to include some contiguous blocks,
156 * further reducing the number of table entries required.
158 * The driver reverts to PIO mode for individual requests that exceed
159 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
160 * 100% of all crazy scenarios here is not necessary.
162 * As it turns out though, we must allocate a full 4KB page for this,
163 * so the two PRD tables (ide0 & ide1) will each get half of that,
164 * allowing each to have about 256 entries (8 bytes each) from this.
167 #define PRD_ENTRIES 256
170 * Some more useful definitions
172 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
173 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
174 #define SECTOR_SIZE 512
175 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
176 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
179 * Timeouts for various operations:
181 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
182 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
183 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
184 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
185 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
186 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
189 * Check for an interrupt and acknowledge the interrupt status
192 typedef int (ide_ack_intr_t)(struct hwif_s *);
199 * hwif_chipset_t is used to keep track of the specific hardware
200 * chipset used by each IDE interface, if known.
202 typedef enum { ide_unknown, ide_generic, ide_pci,
203 ide_cmd640, ide_dtc2278, ide_ali14xx,
204 ide_qd65xx, ide_umc8672, ide_ht6560b,
205 ide_rz1000, ide_trm290,
206 ide_cmd646, ide_cy82c693, ide_4drives,
207 ide_pmac, ide_etrax100, ide_acorn,
208 ide_au1xxx, ide_forced
212 * Structure to hold all information about the location of this port
214 typedef struct hw_regs_s {
215 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
216 int irq; /* our irq number */
217 int dma; /* our dma entry */
218 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
219 hwif_chipset_t chipset;
224 * Register new hardware with ide
226 int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
227 int ide_register_hw_with_fixup(hw_regs_t *, struct hwif_s **, void (*)(struct hwif_s *));
230 * Set up hw_regs_t structure before calling ide_register_hw (optional)
232 void ide_setup_ports( hw_regs_t *hw,
237 ide_ack_intr_t *ack_intr,
243 static inline void ide_std_init_ports(hw_regs_t *hw,
244 unsigned long io_addr,
245 unsigned long ctl_addr)
249 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
250 hw->io_ports[i] = io_addr++;
252 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
257 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
259 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
262 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
263 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
264 # define ide_default_io_base(index) (0)
265 # define ide_default_irq(base) (0)
266 # define ide_init_default_irq(base) (0)
270 * ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series.
271 * New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>.
273 #ifdef IDE_ARCH_OBSOLETE_INIT
274 static inline void ide_init_hwif_ports(hw_regs_t *hw,
275 unsigned long io_addr,
276 unsigned long ctl_addr,
280 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
282 ide_std_init_ports(hw, io_addr, ctl_addr);
287 hw->io_ports[IDE_IRQ_OFFSET] = 0;
290 if (ppc_ide_md.ide_init_hwif)
291 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
295 static inline void ide_init_hwif_ports(hw_regs_t *hw,
296 unsigned long io_addr,
297 unsigned long ctl_addr,
300 if (io_addr || ctl_addr)
301 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
303 #endif /* IDE_ARCH_OBSOLETE_INIT */
305 /* Currently only m68k, apus and m8xx need it */
306 #ifndef IDE_ARCH_ACK_INTR
307 # define ide_ack_intr(hwif) (1)
310 /* Currently only Atari needs it */
311 #ifndef IDE_ARCH_LOCK
312 # define ide_release_lock() do {} while (0)
313 # define ide_get_lock(hdlr, data) do {} while (0)
314 #endif /* IDE_ARCH_LOCK */
317 * Now for the data we need to maintain per-drive: ide_drive_t
320 #define ide_scsi 0x21
321 #define ide_disk 0x20
322 #define ide_optical 0x7
323 #define ide_cdrom 0x5
325 #define ide_floppy 0x0
328 * Special Driver Flags
330 * set_geometry : respecify drive geometry
331 * recalibrate : seek to cyl 0
332 * set_multmode : set multmode count
333 * set_tune : tune interface for drive
334 * serviced : service command
340 #if defined(__LITTLE_ENDIAN_BITFIELD)
341 unsigned set_geometry : 1;
342 unsigned recalibrate : 1;
343 unsigned set_multmode : 1;
344 unsigned set_tune : 1;
345 unsigned serviced : 1;
346 unsigned reserved : 3;
347 #elif defined(__BIG_ENDIAN_BITFIELD)
348 unsigned reserved : 3;
349 unsigned serviced : 1;
350 unsigned set_tune : 1;
351 unsigned set_multmode : 1;
352 unsigned recalibrate : 1;
353 unsigned set_geometry : 1;
355 #error "Please fix <asm/byteorder.h>"
361 * ATA DATA Register Special.
362 * ATA NSECTOR Count Register().
363 * ATAPI Byte Count Register.
364 * Channel index ordering pairs.
369 #if defined(__LITTLE_ENDIAN_BITFIELD)
370 unsigned low :8; /* LSB */
371 unsigned high :8; /* MSB */
372 #elif defined(__BIG_ENDIAN_BITFIELD)
373 unsigned high :8; /* MSB */
374 unsigned low :8; /* LSB */
376 #error "Please fix <asm/byteorder.h>"
379 } ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
382 * ATA-IDE Select Register, aka Device-Head
384 * head : always zeros here
385 * unit : drive select number: 0/1
387 * lba : using LBA instead of CHS
393 #if defined(__LITTLE_ENDIAN_BITFIELD)
399 #elif defined(__BIG_ENDIAN_BITFIELD)
406 #error "Please fix <asm/byteorder.h>"
409 } select_t, ata_select_t;
412 * The ATA-IDE Status Register.
413 * The ATAPI Status Register.
415 * check : Error occurred
417 * corr : Correctable error occurred
418 * drq : Data is request by the device
419 * dsc : Disk Seek Complete : ata
420 * : Media access command finished : atapi
421 * df : Device Fault : ata
423 * drdy : Ready, Command Mode Capable : ata
424 * : Ignored for ATAPI commands : atapi
426 * : The device has access to the command block
431 #if defined(__LITTLE_ENDIAN_BITFIELD)
440 #elif defined(__BIG_ENDIAN_BITFIELD)
450 #error "Please fix <asm/byteorder.h>"
453 } ata_status_t, atapi_status_t;
456 * ATAPI Feature Register
458 * dma : Using DMA or PIO
459 * reserved321 : Reserved
460 * reserved654 : Reserved (Tag Type)
461 * reserved7 : Reserved
466 #if defined(__LITTLE_ENDIAN_BITFIELD)
468 unsigned reserved321 :3;
469 unsigned reserved654 :3;
470 unsigned reserved7 :1;
471 #elif defined(__BIG_ENDIAN_BITFIELD)
472 unsigned reserved7 :1;
473 unsigned reserved654 :3;
474 unsigned reserved321 :3;
477 #error "Please fix <asm/byteorder.h>"
483 * ATAPI Interrupt Reason Register.
485 * cod : Information transferred is command (1) or data (0)
486 * io : The device requests us to read (1) or write (0)
487 * reserved : Reserved
492 #if defined(__LITTLE_ENDIAN_BITFIELD)
495 unsigned reserved :6;
496 #elif defined(__BIG_ENDIAN_BITFIELD)
497 unsigned reserved :6;
501 #error "Please fix <asm/byteorder.h>"
507 * The ATAPI error register.
509 * ili : Illegal Length Indication
510 * eom : End Of Media Detected
511 * abrt : Aborted command - As defined by ATA
512 * mcr : Media Change Requested - As defined by ATA
513 * sense_key : Sense key of the last failed packet command
518 #if defined(__LITTLE_ENDIAN_BITFIELD)
523 unsigned sense_key :4;
524 #elif defined(__BIG_ENDIAN_BITFIELD)
525 unsigned sense_key :4;
531 #error "Please fix <asm/byteorder.h>"
537 * Status returned from various ide_ functions
540 ide_stopped, /* no drive operation was started */
541 ide_started, /* a drive operation was started, handler was set */
545 struct ide_settings_s;
547 #ifdef CONFIG_BLK_DEV_IDEACPI
548 struct ide_acpi_drive_link;
549 struct ide_acpi_hwif_link;
552 typedef struct ide_drive_s {
553 char name[4]; /* drive name, such as "hda" */
554 char driver_req[10]; /* requests specific driver */
556 request_queue_t *queue; /* request queue */
558 struct request *rq; /* current request */
559 struct ide_drive_s *next; /* circular list of hwgroup drives */
560 void *driver_data; /* extra driver data */
561 struct hd_driveid *id; /* drive model identification info */
562 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
563 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
565 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
567 unsigned long sleep; /* sleep until this time */
568 unsigned long service_start; /* time we started last request */
569 unsigned long service_time; /* service time of last request */
570 unsigned long timeout; /* max time to wait for irq */
572 special_t special; /* special action flags */
573 select_t select; /* basic drive/head select reg value */
575 u8 keep_settings; /* restore settings after drive reset */
576 u8 autodma; /* device can safely use dma on host */
577 u8 using_dma; /* disk is using dma for read/write */
578 u8 retry_pio; /* retrying dma capable host in pio */
579 u8 state; /* retry state */
580 u8 waiting_for_dma; /* dma currently in progress */
581 u8 unmask; /* okay to unmask other irqs */
582 u8 bswap; /* byte swap data */
583 u8 noflush; /* don't attempt flushes */
584 u8 dsc_overlap; /* DSC overlap */
585 u8 nice1; /* give potential excess bandwidth */
587 unsigned present : 1; /* drive is physically present */
588 unsigned dead : 1; /* device ejected hint */
589 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
590 unsigned noprobe : 1; /* from: hdx=noprobe */
591 unsigned removable : 1; /* 1 if need to do check_media_change */
592 unsigned attach : 1; /* needed for removable devices */
593 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
594 unsigned no_unmask : 1; /* disallow setting unmask bit */
595 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
596 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
597 unsigned nice0 : 1; /* give obvious excess bandwidth */
598 unsigned nice2 : 1; /* give a share in our own bandwidth */
599 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
600 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
601 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
602 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
603 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
604 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
605 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
606 unsigned post_reset : 1;
608 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
609 u8 quirk_list; /* considered quirky, set for a specific host */
610 u8 init_speed; /* transfer rate set at boot */
611 u8 current_speed; /* current transfer rate set */
612 u8 desired_speed; /* desired transfer rate set */
613 u8 dn; /* now wide spread use */
614 u8 wcache; /* status of write cache */
615 u8 acoustic; /* acoustic management */
616 u8 media; /* disk, cdrom, tape, floppy, ... */
617 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
618 u8 ready_stat; /* min status value for drive ready */
619 u8 mult_count; /* current multiple sector setting */
620 u8 mult_req; /* requested multiple sector setting */
621 u8 tune_req; /* requested drive tuning setting */
622 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
623 u8 bad_wstat; /* used for ignoring WRERR_STAT */
624 u8 nowerr; /* used for ignoring WRERR_STAT */
625 u8 sect0; /* offset of first sector for DM6:DDO */
626 u8 head; /* "real" number of heads */
627 u8 sect; /* "real" sectors per track */
628 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
629 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
631 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
632 unsigned int cyl; /* "real" number of cyls */
633 unsigned int drive_data; /* use by tuneproc/selectproc */
634 unsigned int failures; /* current failure count */
635 unsigned int max_failures; /* maximum allowed failure count */
636 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
638 u64 capacity64; /* total number of sectors */
640 int lun; /* logical unit */
641 int crc_count; /* crc counter to reduce drive speed */
642 #ifdef CONFIG_BLK_DEV_IDEACPI
643 struct ide_acpi_drive_link *acpidata;
645 struct list_head list;
646 struct device gendev;
647 struct completion gendev_rel_comp; /* to deal with device release() */
650 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
652 #define IDE_CHIPSET_PCI_MASK \
653 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
654 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
656 struct ide_pci_device_s;
658 typedef struct hwif_s {
659 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
660 struct hwif_s *mate; /* other hwif from same PCI chip */
661 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
662 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
664 char name[6]; /* name of interface, eg. "ide0" */
666 /* task file registers for pata and sata */
667 unsigned long io_ports[IDE_NR_PORTS];
668 unsigned long sata_scr[SATA_NR_PORTS];
669 unsigned long sata_misc[SATA_NR_PORTS];
671 hw_regs_t hw; /* Hardware info */
672 ide_drive_t drives[MAX_DRIVES]; /* drive info */
674 u8 major; /* our major number */
675 u8 index; /* 0 for ide0; 1 for ide1; ... */
676 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
677 u8 straight8; /* Alan's straight 8 check */
678 u8 bus_state; /* power state of the IDE bus */
680 u8 atapi_dma; /* host supports atapi_dma */
685 hwif_chipset_t chipset; /* sub-module for tuning.. */
687 struct pci_dev *pci_dev; /* for pci chipsets */
688 struct ide_pci_device_s *cds; /* chipset device struct */
690 void (*rw_disk)(ide_drive_t *, struct request *);
693 ide_hwif_ops_t *hwifops;
695 /* routine to tune PIO mode for drives */
696 void (*tuneproc)(ide_drive_t *, u8);
697 /* routine to retune DMA modes for drives */
698 int (*speedproc)(ide_drive_t *, u8);
699 /* tweaks hardware to select drive */
700 void (*selectproc)(ide_drive_t *);
701 /* chipset polling based on hba specifics */
702 int (*reset_poll)(ide_drive_t *);
703 /* chipset specific changes to default for device-hba resets */
704 void (*pre_reset)(ide_drive_t *);
705 /* routine to reset controller after a disk reset */
706 void (*resetproc)(ide_drive_t *);
707 /* special interrupt handling for shared pci interrupts */
708 void (*intrproc)(ide_drive_t *);
709 /* special host masking for drive selection */
710 void (*maskproc)(ide_drive_t *, int);
711 /* check host's drive quirk list */
712 int (*quirkproc)(ide_drive_t *);
713 /* driver soft-power interface */
714 int (*busproc)(ide_drive_t *, int);
716 u8 (*udma_filter)(ide_drive_t *);
718 void (*ata_input_data)(ide_drive_t *, void *, u32);
719 void (*ata_output_data)(ide_drive_t *, void *, u32);
721 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
722 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
724 int (*dma_setup)(ide_drive_t *);
725 void (*dma_exec_cmd)(ide_drive_t *, u8);
726 void (*dma_start)(ide_drive_t *);
727 int (*ide_dma_end)(ide_drive_t *drive);
728 int (*ide_dma_check)(ide_drive_t *drive);
729 int (*ide_dma_on)(ide_drive_t *drive);
730 void (*dma_off_quietly)(ide_drive_t *drive);
731 int (*ide_dma_test_irq)(ide_drive_t *drive);
732 void (*ide_dma_clear_irq)(ide_drive_t *drive);
733 void (*dma_host_on)(ide_drive_t *drive);
734 void (*dma_host_off)(ide_drive_t *drive);
735 int (*ide_dma_lostirq)(ide_drive_t *drive);
736 int (*ide_dma_timeout)(ide_drive_t *drive);
738 void (*OUTB)(u8 addr, unsigned long port);
739 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
740 void (*OUTW)(u16 addr, unsigned long port);
741 void (*OUTSW)(unsigned long port, void *addr, u32 count);
742 void (*OUTSL)(unsigned long port, void *addr, u32 count);
744 u8 (*INB)(unsigned long port);
745 u16 (*INW)(unsigned long port);
746 void (*INSW)(unsigned long port, void *addr, u32 count);
747 void (*INSL)(unsigned long port, void *addr, u32 count);
749 /* dma physical region descriptor table (cpu view) */
750 unsigned int *dmatable_cpu;
751 /* dma physical region descriptor table (dma view) */
752 dma_addr_t dmatable_dma;
753 /* Scatter-gather list used to build the above */
754 struct scatterlist *sg_table;
755 int sg_max_nents; /* Maximum number of entries in it */
756 int sg_nents; /* Current number of entries in it */
757 int sg_dma_direction; /* dma transfer direction */
759 /* data phase of the active command (currently only valid for PIO/DMA) */
765 unsigned int cursg_ofs;
767 int rqsize; /* max sectors per request */
768 int irq; /* our irq number */
770 unsigned long dma_master; /* reference base addr dmabase */
771 unsigned long dma_base; /* base addr for dma ports */
772 unsigned long dma_command; /* dma command register */
773 unsigned long dma_vendor1; /* dma vendor 1 register */
774 unsigned long dma_status; /* dma status register */
775 unsigned long dma_vendor3; /* dma vendor 3 register */
776 unsigned long dma_prdtable; /* actual prd table address */
778 unsigned long config_data; /* for use by chipset-specific code */
779 unsigned long select_data; /* for use by chipset-specific code */
781 unsigned long extra_base; /* extra addr for dma ports */
782 unsigned extra_ports; /* number of extra dma ports */
784 unsigned noprobe : 1; /* don't probe for this interface */
785 unsigned present : 1; /* this interface exists */
786 unsigned hold : 1; /* this interface is always present */
787 unsigned serialized : 1; /* serialized all channel operation */
788 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
789 unsigned reset : 1; /* reset after probe */
790 unsigned autodma : 1; /* auto-attempt using DMA at boot */
791 unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
792 unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */
793 unsigned no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
794 unsigned auto_poll : 1; /* supports nop auto-poll */
795 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
796 unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
797 unsigned err_stops_fifo : 1; /* 1=data FIFO is cleared by an error */
798 unsigned mmio : 1; /* host uses MMIO */
800 struct device gendev;
801 struct completion gendev_rel_comp; /* To deal with device release() */
803 void *hwif_data; /* extra hwif data */
807 #ifdef CONFIG_BLK_DEV_IDEACPI
808 struct ide_acpi_hwif_link *acpidata;
810 } ____cacheline_internodealigned_in_smp ide_hwif_t;
813 * internal ide interrupt handler type
815 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
816 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
817 typedef int (ide_expiry_t)(ide_drive_t *);
819 typedef struct hwgroup_s {
820 /* irq handler, if active */
821 ide_startstop_t (*handler)(ide_drive_t *);
822 /* irq handler, suspended if active */
823 ide_startstop_t (*handler_save)(ide_drive_t *);
824 /* BOOL: protects all fields below */
826 /* BOOL: wake us up on timer expiry */
827 unsigned int sleeping : 1;
828 /* BOOL: polling active & poll_timeout field valid */
829 unsigned int polling : 1;
830 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
831 unsigned int resetting : 1;
835 /* ptr to current hwif in linked-list */
838 /* for pci chipsets */
839 struct pci_dev *pci_dev;
840 /* chipset device struct */
841 struct ide_pci_device_s *cds;
843 /* current request */
846 struct timer_list timer;
847 /* local copy of current write rq */
849 /* timeout value during long polls */
850 unsigned long poll_timeout;
851 /* queried upon timeouts */
852 int (*expiry)(ide_drive_t *);
853 /* ide_system_bus_speed */
858 unsigned char cmd_buf[4];
861 /* structure attached to the request for IDE_TASK_CMDS */
864 * configurable drive settings
871 #define SETTING_READ (1 << 0)
872 #define SETTING_WRITE (1 << 1)
873 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
875 typedef int (ide_procset_t)(ide_drive_t *, int);
876 typedef struct ide_settings_s {
887 struct ide_settings_s *next;
890 extern struct semaphore ide_setting_sem;
891 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
892 extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
893 extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
894 extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
895 extern void ide_add_generic_settings(ide_drive_t *drive);
898 * /proc/ide interface
903 read_proc_t *read_proc;
904 write_proc_t *write_proc;
907 #ifdef CONFIG_IDE_PROC_FS
908 extern struct proc_dir_entry *proc_ide_root;
910 void proc_ide_create(void);
911 void proc_ide_destroy(void);
912 void create_proc_ide_interfaces(void);
913 void destroy_proc_ide_interface(ide_hwif_t *);
914 void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
915 void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
916 read_proc_t proc_ide_read_capacity;
917 read_proc_t proc_ide_read_geometry;
919 #ifdef CONFIG_BLK_DEV_IDEPCI
920 void ide_pci_create_host_proc(const char *, get_info_t *);
924 * Standard exit stuff:
926 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
935 *start = page + off; \
939 static inline void proc_ide_create(void) { ; }
940 static inline void proc_ide_destroy(void) { ; }
941 static inline void create_proc_ide_interfaces(void) { ; }
942 static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; }
943 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
947 * Power Management step value (rq->pm->pm_step).
949 * The step value starts at 0 (ide_pm_state_start_suspend) for a
950 * suspend operation or 1000 (ide_pm_state_start_resume) for a
953 * For each step, the core calls the subdriver start_power_step() first.
955 * - ide_stopped : In this case, the core calls us back again unless
956 * step have been set to ide_power_state_completed.
957 * - ide_started : In this case, the channel is left busy until an
958 * async event (interrupt) occurs.
959 * Typically, start_power_step() will issue a taskfile request with
962 * Upon reception of the interrupt, the core will call complete_power_step()
963 * with the error code if any. This routine should update the step value
964 * and return. It should not start a new request. The core will call
965 * start_power_step for the new step value, unless step have been set to
966 * ide_power_state_completed.
968 * Subdrivers are expected to define their own additional power
969 * steps from 1..999 for suspend and from 1001..1999 for resume,
970 * other values are reserved for future use.
974 ide_pm_state_completed = -1,
975 ide_pm_state_start_suspend = 0,
976 ide_pm_state_start_resume = 1000,
980 * Subdrivers support.
982 * The gendriver.owner field should be set to the module owner of this driver.
983 * The gendriver.name field should be set to the name of this driver
985 typedef struct ide_driver_s {
988 unsigned supports_dsc_overlap : 1;
989 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
990 int (*end_request)(ide_drive_t *, int, int);
991 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
992 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
993 ide_proc_entry_t *proc;
994 struct device_driver gen_driver;
995 int (*probe)(ide_drive_t *);
996 void (*remove)(ide_drive_t *);
997 void (*shutdown)(ide_drive_t *);
1000 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
1002 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
1005 * ide_hwifs[] is the master data structure used to keep track
1006 * of just about everything in ide.c. Whenever possible, routines
1007 * should be using pointers to a drive (ide_drive_t *) or
1008 * pointers to a hwif (ide_hwif_t *), rather than indexing this
1009 * structure directly (the allocation/layout may change!).
1013 extern ide_hwif_t ide_hwifs[]; /* master data repository */
1015 extern int noautodma;
1017 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1018 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
1019 int uptodate, int nr_sectors);
1022 * This is used on exit from the driver to designate the next irq handler
1023 * and also to start the safety timer.
1025 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1028 * This is used on exit from the driver to designate the next irq handler
1029 * and start the safety time safely and atomically from the IRQ handler
1030 * with respect to the command issue (which it also does)
1032 extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
1034 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1037 * ide_error() takes action based on the error returned by the controller.
1038 * The caller should return immediately after invoking this.
1040 * (drive, msg, status)
1042 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1044 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
1047 * Abort a running command on the controller triggering the abort
1048 * from a host side, non error situation
1051 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1053 extern void ide_fix_driveid(struct hd_driveid *);
1055 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
1056 * removing leading/trailing blanks and compressing internal blanks.
1057 * It is primarily used to tidy up the model name/number fields as
1058 * returned by the WIN_[P]IDENTIFY commands.
1060 * (s, bytecount, byteswap)
1062 extern void ide_fixstring(u8 *, const int, const int);
1065 * This routine busy-waits for the drive status to be not "busy".
1066 * It then checks the status for all of the "good" bits and none
1067 * of the "bad" bits, and if all is okay it returns 0. All other
1068 * cases return 1 after doing "*startstop = ide_error()", and the
1069 * caller should return the updated value of "startstop" in this case.
1070 * "startstop" is unchanged when the function returns 0;
1071 * (startstop, drive, good, bad, timeout)
1073 extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1076 * Start a reset operation for an IDE interface.
1077 * The caller should return immediately after invoking this.
1079 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1082 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1084 extern void ide_init_drive_cmd (struct request *rq);
1087 * this function returns error location sector offset in case of a write error
1089 extern u64 ide_get_error_location(ide_drive_t *, char *);
1092 * "action" parameter type for ide_do_drive_cmd() below.
1095 ide_wait, /* insert rq at end of list, and wait for it */
1096 ide_preempt, /* insert rq in front of current request */
1097 ide_head_wait, /* insert rq in front of current request and wait for it */
1098 ide_end /* insert rq at end of list, but don't wait for it */
1101 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1104 * Clean up after success/failure of an explicit drive cmd.
1105 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
1106 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
1108 * (ide_drive_t *drive, u8 stat, u8 err)
1110 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1113 * Issue ATA command and wait for completion.
1114 * Use for implementing commands in kernel
1116 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1118 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1120 typedef struct ide_task_s {
1122 * struct hd_drive_task_hdr tf;
1124 * struct hd_drive_hob_hdr hobf;
1125 * hob_struct_t hobf;
1127 task_ioreg_t tfRegister[8];
1128 task_ioreg_t hobRegister[8];
1129 ide_reg_valid_t tf_out_flags;
1130 ide_reg_valid_t tf_in_flags;
1133 ide_pre_handler_t *prehandler;
1134 ide_handler_t *handler;
1135 struct request *rq; /* copy of request */
1136 void *special; /* valid_t generally */
1139 extern u32 ide_read_24(ide_drive_t *);
1141 extern void SELECT_DRIVE(ide_drive_t *);
1142 extern void SELECT_INTERRUPT(ide_drive_t *);
1143 extern void SELECT_MASK(ide_drive_t *, int);
1144 extern void QUIRK_LIST(ide_drive_t *);
1146 extern int drive_is_ready(ide_drive_t *);
1147 extern int wait_for_ready(ide_drive_t *, int /* timeout */);
1150 * taskfile io for disks for now...and builds request from ide_ioctl
1152 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1155 * Special Flagged Register Validation Caller
1157 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1159 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1160 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1161 extern ide_startstop_t recal_intr(ide_drive_t *);
1162 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1163 extern ide_startstop_t task_in_intr(ide_drive_t *);
1164 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1166 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1168 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1169 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1170 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1172 extern int system_bus_clock(void);
1174 extern int ide_driveid_update(ide_drive_t *);
1175 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1176 extern int ide_config_drive_speed(ide_drive_t *, u8);
1177 extern u8 eighty_ninty_three (ide_drive_t *);
1178 extern int set_transfer(ide_drive_t *, ide_task_t *);
1179 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1181 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1184 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1185 * to the hwgroup by sleeping for timeout jiffies.
1187 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1189 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1190 extern void ide_timer_expiry(unsigned long);
1191 extern irqreturn_t ide_intr(int irq, void *dev_id);
1192 extern void do_ide_request(request_queue_t *);
1194 void ide_init_disk(struct gendisk *, ide_drive_t *);
1196 extern int ideprobe_init(void);
1198 extern void ide_scan_pcibus(int scan_direction) __init;
1199 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1200 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1201 void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);
1202 extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
1204 extern void default_hwif_iops(ide_hwif_t *);
1205 extern void default_hwif_mmiops(ide_hwif_t *);
1206 extern void default_hwif_transport(ide_hwif_t *);
1208 void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
1209 void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
1212 #define NEVER_BOARD 0
1214 #ifdef CONFIG_BLK_DEV_OFFBOARD
1215 # define OFF_BOARD ON_BOARD
1216 #else /* CONFIG_BLK_DEV_OFFBOARD */
1217 # define OFF_BOARD NEVER_BOARD
1218 #endif /* CONFIG_BLK_DEV_OFFBOARD */
1224 typedef struct ide_pci_enablebit_s {
1225 u8 reg; /* byte pci reg holding the enable-bit */
1226 u8 mask; /* mask to isolate the enable-bit */
1227 u8 val; /* value of masked reg when "enabled" */
1228 } ide_pci_enablebit_t;
1231 /* Uses ISA control ports not PCI ones. */
1232 IDEPCI_FLAG_ISA_PORTS = (1 << 0),
1235 typedef struct ide_pci_device_s {
1237 int (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
1238 void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
1239 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1240 void (*init_iops)(ide_hwif_t *);
1241 void (*init_hwif)(ide_hwif_t *);
1242 void (*init_dma)(ide_hwif_t *, unsigned long);
1243 void (*fixup)(ide_hwif_t *);
1246 ide_pci_enablebit_t enablebits[2];
1249 struct ide_pci_device_s *next;
1254 extern int ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
1255 extern int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
1257 void ide_map_sg(ide_drive_t *, struct request *);
1258 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1260 #define BAD_DMA_DRIVE 0
1261 #define GOOD_DMA_DRIVE 1
1263 #ifdef CONFIG_BLK_DEV_IDEDMA
1264 struct drive_list_entry {
1265 const char *id_model;
1266 const char *id_firmware;
1269 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1270 int __ide_dma_bad_drive(ide_drive_t *);
1271 int __ide_dma_good_drive(ide_drive_t *);
1272 int ide_use_dma(ide_drive_t *);
1273 u8 ide_max_dma_mode(ide_drive_t *);
1274 int ide_tune_dma(ide_drive_t *);
1275 void ide_dma_off(ide_drive_t *);
1276 void ide_dma_verbose(ide_drive_t *);
1277 int ide_set_dma(ide_drive_t *);
1278 ide_startstop_t ide_dma_intr(ide_drive_t *);
1280 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1281 extern int ide_build_sglist(ide_drive_t *, struct request *);
1282 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1283 extern void ide_destroy_dmatable(ide_drive_t *);
1284 extern int ide_release_dma(ide_hwif_t *);
1285 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1287 void ide_dma_host_off(ide_drive_t *);
1288 void ide_dma_off_quietly(ide_drive_t *);
1289 void ide_dma_host_on(ide_drive_t *);
1290 extern int __ide_dma_on(ide_drive_t *);
1291 extern int __ide_dma_check(ide_drive_t *);
1292 extern int ide_dma_setup(ide_drive_t *);
1293 extern void ide_dma_start(ide_drive_t *);
1294 extern int __ide_dma_end(ide_drive_t *);
1295 extern int __ide_dma_lostirq(ide_drive_t *);
1296 extern int __ide_dma_timeout(ide_drive_t *);
1297 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1300 static inline int ide_use_dma(ide_drive_t *drive) { return 0; }
1301 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1302 static inline int ide_tune_dma(ide_drive_t *drive) { return 0; }
1303 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1304 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1305 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1306 #endif /* CONFIG_BLK_DEV_IDEDMA */
1308 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1309 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1312 #ifdef CONFIG_BLK_DEV_IDEACPI
1313 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1314 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1315 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1316 extern void ide_acpi_init(ide_hwif_t *hwif);
1318 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1319 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1320 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1321 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1324 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1325 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1326 extern void ide_unregister (unsigned int index);
1328 void ide_register_region(struct gendisk *);
1329 void ide_unregister_region(struct gendisk *);
1331 void ide_undecoded_slave(ide_hwif_t *);
1333 int probe_hwif_init_with_fixup(ide_hwif_t *, void (*)(ide_hwif_t *));
1334 extern int probe_hwif_init(ide_hwif_t *);
1336 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1338 return hwif->hwif_data;
1341 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1343 hwif->hwif_data = data;
1347 u8 ide_rate_filter(ide_drive_t *, u8);
1348 extern int ide_dma_enable(ide_drive_t *drive);
1349 extern char *ide_xfer_verbose(u8 xfer_rate);
1350 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1351 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1352 int ide_use_fast_pio(ide_drive_t *);
1354 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1356 typedef struct ide_pio_timings_s {
1357 int setup_time; /* Address setup (ns) minimum */
1358 int active_time; /* Active pulse (ns) minimum */
1359 int cycle_time; /* Cycle time (ns) minimum = */
1360 /* active + recovery (+ setup for some chips) */
1361 } ide_pio_timings_t;
1363 typedef struct ide_pio_data_s {
1367 unsigned int cycle_time;
1370 extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
1371 extern const ide_pio_timings_t ide_pio_timings[6];
1374 extern spinlock_t ide_lock;
1375 extern struct semaphore ide_cfg_sem;
1377 * Structure locking:
1379 * ide_cfg_sem and ide_lock together protect changes to
1380 * ide_hwif_t->{next,hwgroup}
1383 * ide_hwgroup_t->busy: ide_lock
1384 * ide_hwgroup_t->hwif: ide_lock
1385 * ide_hwif_t->mate: constant, no locking
1386 * ide_drive_t->hwif: constant, no locking
1389 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1391 extern struct bus_type ide_bus_type;
1393 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1394 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1396 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1397 #define ide_id_has_flush_cache_ext(id) \
1398 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1400 static inline int hwif_to_node(ide_hwif_t *hwif)
1402 struct pci_dev *dev = hwif->pci_dev;
1403 return dev ? pcibus_to_node(dev->bus) : -1;